Today's Message Index:
----------------------
1. 12:12 AM - Re: Interference Becker 4201 radio (Jan Mevis)
2. 12:13 AM - Re: Interference Becker 4201 radio (Hans Oortman)
3. 06:10 AM - Re: Interference Becker 4201 radio (Jim Bernier)
4. 11:14 AM - ANR conversion (doug sapp)
5. 11:36 AM - Re: ANR conversion (vectorwarbirds@aol.com)
6. 11:47 AM - Re: ANR conversion (Frank Stelwagon)
7. 11:51 AM - Re: ANR conversion (Roger Kemp M.D.)
8. 11:52 AM - Replacing -52 compressor (Bill1200)
9. 12:17 PM - Re: Replacing -52 compressor (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
10. 12:41 PM - Re: Interference Becker 4201 radio (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
11. 12:50 PM - Re: Interference Becker 4201 radio (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
12. 12:58 PM - Re: Interference Becker 4201 radio (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
13. 01:06 PM - Re: Interference Becker 4201 radio (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
14. 01:37 PM - Recall: ANR conversion (Rieder, David A (AZ76))
15. 01:37 PM - Re: ANR conversion (Rieder, David A (AZ76))
16. 01:51 PM - Re: Replacing -52 compressor (Jan Mevis)
17. 04:39 PM - Re: ANR conversion (Jim Griffin)
18. 06:16 PM - Re: ANR conversion (A. Dennis Savarese)
19. 09:31 PM - Re: Replacing -52 compressor (Bill1200)
Message 1
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| Subject: | Interference Becker 4201 radio |
That's correct, Mark! It's the small 10 amp model, and I have a big
electrolytic capacitor behind the rectifier/regulator.
Jan
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 juli 2009 22:20
Subject: RE: Yak-List: Interference Becker 4201 radio
MALS-14 64E" <mark.bitterlich@navy.mil>
Jan, it is very likely with that model that you have installed a big
filter capacitor with the system. Big Blue thing. Usually comes with
the over-voltage protection kit for the small B&C. Do you have the 10
amp PMG model, or the 35 amp with a field wire?
Don't limit it to just the generator versus alternator Jan. No one has
yet determined the exact source for all this noise that everyone is
reporting. Doc has installed filters that help, but that does not
really identify what is causing it. It may help in determining how it
is getting INTO the radio. Craig seems to indicate it is coming in the
antenna. Doc seems to indicate it is coming in via the power wiring.
No one really knows what is making the noise to begin with.
Consider yourself lucky.
Mark Bitterlich
P.s. Install the digital tach using the P lead connections and see what
happens.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, July 08, 2009 3:48 PM
Subject: RE: Yak-List: Interference Becker 4201 radio
I have a DC-DC- convertor on the battery, and NO filter on the 12 volts
line to the radio. The Becker 4201 on my Yak 50 works perfectly well.
Perhaps one major difference: I have a B&C alternator and thus electric
voltage regulator ? Is it possible that this generates far less noise
than the Russian generator and Russian voltage regulator ?
Jan
YK50
RA2005K
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 juli 2009 21:33
Subject: RE: Yak-List: Interference Becker 4201 radio
--> Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
Just a note to Hans and anyone else.
What Hans found (thanks to Dennis for remembering to check for it) is a
12 volt radio connected in-between two 12 volt batteries connected in
series to provide 24 volts.
Actually Hans, doing it that way does allow the battery to act as a
fairly good filter (of sorts) to generator noise, and it still does not
explain in any way why connecting your GPS cable did what it did. That
little phenomenon is another strong bit of evidence that the Becker
noise is all coming in from the DC power line and not the antenna.
That aside, hooking any 12 volt accessory up like this is very do-able,
and will work just fine, for awhile.
What eventually happens is that you end up putting more load on one
battery than the other one as they are operated. Eventually, the one
battery won't charge quite as perfectly as it should. This can be very
hard to detect, because your cockpit meter is looking at BOTH of them
and not just the one that is powering your radio, or whatever else.
Eventually, the batteries start to charge unevenly, and the voltage on
the one supplying the 12 volts starts to fail faster than the other one.
The end result is unpredictable voltage to the "12 volt device(s)".
This can damage them. Not right away. It takes awhile.
Another thing that can happen is that as you put on a heavy 28 volt
load, the voltage in the middle of the 2 batteries goes even more off,
again giving the potential for voltages being present that you would
never use intentionally, and that you know very little about.
If you change the batteries regularly, you can get away with this
approach, but it really is a bad design choice.
As Hans has noted, the best choice is to use a DC to DC converter, that
runs off of 28 volts, and steps down to 12 volts. It also then is a
good idea to put a line filter and a good sized cap on the output line
for further filtering. Then put a switch on the INPUT to this DC to DC
converter to allow it to be turned OFF when you want it to be. Or have
it wired to a circuit breaker.. Whatever.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Wednesday, July 08, 2009 10:13 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
I'm going to try to install the in line filter during the coming
weekend. I wanna have this solved. In the meantime, thanks to Dennis, I
found that the Becker 12v is connected directly to the series connection
wire of the 12v batteries, i.e. there is no DC-DC converter used and
this means that the "dirty" power from the generator will go unfiltered
in to the Becker.
I did some measurements here at my company and found the Becker to be a
poor performer from an RF point of view, but there is nothing I can do
about that then buy myself another one from a different brand that
is....
However, before I get to that point I'll try a real dc-dc converter in
combination with the Lonestar in-line filter.
I'll keep you guys posted on the progress.
Hans Oortman, MBA, Ph.D.
CEO
STN BV
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Roger Kemp M.D.
Verzonden: woensdag 8 juli 2009 15:46
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Han's,
This is a problem that I have with my 50. There are three connections on
the filter. One goes to ground, one to the DC power supply and the other
to the power supply in line to the Becker Radio. I simply inserted the
filter into the power supply line from the DC converter to the radio. I
have my Buss Bar wired so the com switch takes 24 volt current to the DC
converter first with obviously the outline from the converter carrying
12 volt current to the Becker.
Agree, do not know why the Becker is so sensitive to RF noise. I even
changed out the radio for another Becker I had on the shelf. They both
did the same thing. The filters have helped immensely.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 9:23 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
Yeah...I do have the in line filter as well as the capacitor for the
generator but did not install it yet. Have not found a place to install
it safely. I need to do that. I assume you installed it close to the
busbar in the area of the switches on the left side of the plane and
then with a shielded wire to the VHF??
What I don't understand though is why the Becker radio is so sensitive
for noise on the dc supply??
Hans
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Roger Kemp M.D.
Verzonden: vrijdag 3 juli 2009 15:45
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Hans,
I also added a filter in line with the power supply from my converter to
the Becker radio. It to came from Lone Star Avionics.
http://www.lonestaraviation.com/product_details.asp?Product_Name=The
Eliminator. With the mag filters and the DC filter in line, the noise
has been pretty much eliminated.
The other place to check in your Tack generator shielding.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 8:02 AM
Subject: Yak-List: Interference Becker 4201 radio
Mark,
I finally made the time available to do the tests/modifications we have
talked about with respect to the interference on a Becker VHF radio in
my Yak52.
I installed the Lonestar P-lead filters on both mags. Found that both
screens of the p-leads are in perfect condition but installed the
filters , just to make sure.
The screening can now be called perfect. I have made a special copper
"plug"
to fill up for the thinner wires on the filters. The screens of the
filter wires have been soldered to those "plugs" and locked in the mags.
Everything has been fixed thoroughly and inspected for grounding.
All OK so far. Started the engine and found no difference on the VHF,
i.e.
the interference is still there. That means: the squelch is opened by
the interference. Switching off the squelch it appears that there is no
constant noise level but more of a kind of rattling noise which opens
the squelch.
Checked antenna...found no problem or loose wires. Swr is within the
airband
1 : 1.5 max.
So in my humble opinion there is only 1 thing left: the interference is
going into the vhf via the power supply or the power is that "dirty"
that it is picked up by the vhf antenna.....
I know that the Becker gets its power via a dc-dc converter of some
sort, after all the Yak has 24v standard power. Is the 12 volts present
on any standard Yak or is there a built in down converter somewhere??
What is the "voltage adjustment" screw meant for in the front cockpit??
Did some tests with the GPS also. When the GPS is connected to the power
plug and switched on, the noise level on the VHF opens the squelch which
makes it unuseable in flight.
Switched off gps: noise is reduced but squelch is still opened 6 out of
10 sec. Disconnected power supply lead from GPS but kept it connected to
the plane, same result as GPS being switched off, i.e. the VHF is
picking up interference via its antenna but the noise is generated one
way or the other on the power bus??
I have come to a point of saturation in my mind about the cause of this.
Taking a scope into the cockpit is probably the only way to find out
whether there is any noise on the power bus.
Probably another way is to power the VHF via the cigarette ligher
connector with another dc-dc converter. Thus bypassing the present
circuitry but still using the power on board.
Any suggestions, thoughts are welcomed!
Hans
RA3326K
Mob: +31 653 286022
Message 2
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| Subject: | Interference Becker 4201 radio |
Guys,
This is what I did: I purchased a good DC-DC converter and will install that
in the next few days. In addition to the converter I'll install the Lonestar
Eliminator power line filter in line with the output from the converter.
This combination should eliminate any noise on the dc line to the 4201.
Just out of technical curiosity I checked the Lonestar filter on a HP
Network Analyzer and found that the Eliminator is basically a High Pass
Filter. (See attached plot)
Any frequency below 3.5 Mhz is cut off with at least 40dB. This means that
any ingition noise is cut off very well. It also means that it will "stop"
the 60KHz oscillation frequency of my DC-DC converter reaching the Becker
radio. Technically it should work...now I'll install it and w'll see what
happens....
I'll keep you all posted!.
Hans
RA3326K
_____
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens A. Dennis Savarese
Verzonden: donderdag 9 juli 2009 0:28
Aan: yak-list@matronics.com
Onderwerp: Re: Yak-List: Interference Becker 4201 radio
I believe Doc's solution was a combination of the DC power line filter AND
the P-lead filters. If I remember correctly, first the DC filter was
installed which reduced the noise level substantially. Then the P-lead
filters were installed and with the combination of both types of filters,
the noise has been basically eliminated.
Dennis
----- Original Message -----
From: Roger <mailto:viperdoc@mindspring.com> Kemp M.D.
Sent: Wednesday, July 08, 2009 4:47 PM
Subject: RE: Yak-List: Interference Becker 4201 radio
Mark,
Mine was power input noise. Changing the antenna coax did nothing for it.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Wednesday, July 08, 2009 2:21 PM
Subject: RE: Yak-List: Interference Becker 4201 radio
MALS-14 64E" <mark.bitterlich@navy.mil>
It seems there are two different things going on here. I get the idea
from Craig that he is saying it is coming in from the antenna coax.
I get the readback from you Doc, that it is clearly coming in on the DC
supply line. If it is coming in from the DC supply line, the fix is
easy and very do-able. If it is coming in from the antenna, it gets
much more complex.
Which one is it?
Antenna noise?
Power input noise?
Both?
Mark Bitterlich
P.s. Hans, CLEARLY filter the DC input. Fact is, it worked for Doc,
and that can not be refuted.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: Wednesday, July 08, 2009 9:46 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Han's,
This is a problem that I have with my 50. There are three connections on
the filter. One goes to ground, one to the DC power supply and the other
to the power supply in line to the Becker Radio. I simply inserted the
filter into the power supply line from the DC converter to the radio. I
have my Buss Bar wired so the com switch takes 24 volt current to the DC
converter first with obviously the outline from the converter carrying
12 volt current to the Becker.
Agree, do not know why the Becker is so sensitive to RF noise. I even
changed out the radio for another Becker I had on the shelf. They both
did the same thing. The filters have helped immensely.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 9:23 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
Yeah...I do have the in line filter as well as the capacitor for the
generator but did not install it yet. Have not found a place to install
it safely. I need to do that. I assume you installed it close to the
busbar in the area of the switches on the left side of the plane and
then with a shielded wire to the VHF??
What I don't understand though is why the Becker radio is so sensitive
for noise on the dc supply??
Hans
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Roger Kemp M.D.
Verzonden: vrijdag 3 juli 2009 15:45
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Hans,
I also added a filter in line with the power supply from my converter to
the Becker radio. It to came from Lone Star Avionics.
http://www.lonestaraviation.com/product_details.asp?Product_Name=The
Eliminator. With the mag filters and the DC filter in line, the noise
has been pretty much eliminated.
The other place to check in your Tack generator shielding.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 8:02 AM
Subject: Yak-List: Interference Becker 4201 radio
Mark,
I finally made the time available to do the tests/modifications we have
talked about with respect to the interference on a Becker VHF radio in
my Yak52.
I installed the Lonestar P-lead filters on both mags. Found that both
screens of the p-leads are in perfect condition but installed the
filters , just to make sure.
The screening can now be called perfect. I have made a special copper
"plug"
to fill up for the thinner wires on the filters. The screens of the
filter wires have been soldered to those "plugs" and locked in the mags.
Everything has been fixed thoroughly and inspected for grounding.
All OK so far. Started the engine and found no difference on the VHF,
i.e.
the interference is still there. That means: the squelch is opened by
the interference. Switching off the squelch it appears that there is no
constant noise level but more of a kind of rattling noise which opens
the squelch.
Checked antenna...found no problem or loose wires. Swr is within the
airband
1 : 1.5 max.
So in my humble opinion there is only 1 thing left: the interference is
going into the vhf via the power supply or the power is that "dirty"
that it is picked up by the vhf antenna.....
I know that the Becker gets its power via a dc-dc converter of some
sort, after all the Yak has 24v standard power. Is the 12 volts present
on any standard Yak or is there a built in down converter somewhere??
What is the "voltage adjustment" screw meant for in the front cockpit??
Did some tests with the GPS also. When the GPS is connected to the power
plug and switched on, the noise level on the VHF opens the squelch which
makes it unuseable in flight.
Switched off gps: noise is reduced but squelch is still opened 6 out of
10 sec. Disconnected power supply lead from GPS but kept it connected to
the plane, same result as GPS being switched off, i.e. the VHF is
picking up interference via its antenna but the noise is generated one
way or the other on the power bus??
I have come to a point of saturation in my mind about the cause of this.
Taking a scope into the cockpit is probably the only way to find out
whether there is any noise on the power bus.
Probably another way is to power the VHF via the cigarette ligher
connector with another dc-dc converter. Thus bypassing the present
circuitry but still using the power on board.
Any suggestions, thoughts are welcomed!
Hans
RA3326K
Mob: +31 653 286022
http://www.matronics========================<; via the Web
href="http://forums.matronics.com">http://forums.matronics.com
_p; generous bsp;
href="http://www.matronics.com/contribution">http://www.matronics.com/c====
===========
Message 3
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| Subject: | Interference Becker 4201 radio |
Guys
We have another option with the DC - DC converter. In my case I used it as
a battery balancer. I still tapped off the 12 volt battery to supply the
12 volt buss. And since the energy draw was uneven, I placed the battery
balancer/converter between the two 12 volt batteries in order to supply
more power to the 12 volt bussed battery. It works great. No problem at
all. And if the converter goes down I still have power to the radio and
others. I can turn off the balancer with a remote switch. I monitor the 12
volt buss with the volt meter. I have an auto 24 volt alternator that I
can turn on and off remotely. This allows me to tell if the alternator is
working just by the voltage jump when I turn it on. The balancer is
checked the same way, a slight voltage jump when turned on. I didn't
choose a Becker, I have the XCOM radio.
Jim B
Message 4
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Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html ?
$169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 5
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| Subject: | Re: ANR conversion |
Esteemed One!
I have done four converts with their units, two in David Clarks and two in helmets.
They work great, never failed, no problems. Its been about four and five
years now.? Of course they are not Bose but then... They do have a slight amount
of background hiss, but slight as I said.? I researched this before I did the
next two and found this is a common problem unless you are spending the big
dollars.? It has never bothered me as I am hearing voices anyway.? Hopefully
the pink elephants will stop talking soon.
Hope this helps!
Bunndini
One thing I did do is put a dab of silicone on the small wires on where they are
soldered to the circuit boards, as I did break one off installing once. So just
sercured them here and there for the future.
-----Original Message-----
From: doug sapp <dougsappllc@gmail.com>
Sent: Thu, Jul 9, 2009 11:13 am
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using ?the ANR conversion kit from?http://www.anr-headsets.com/Html_folder/ANRKits.html?? ?$169.00 to convert to ANR. ?
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 6
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| Subject: | Re: ANR conversion |
Doug,
I have seen the kits and they are not bad and appear fairly easy to
install. I have talked to people who have used them and the biggest
problem seems to be the quality of the original headset they converted.
If it wasn't a good passive set it didn't work out to be a great ANR
set. As the prices of the ANR sets are coming down somewhat and the
current economic situation, it may be worth while to try and deal with
your favorite supplier.
Frank Stelwagon
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Thursday, July 09, 2009 11:13 AM
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html
? $169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 7
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Talk to Dennis Savarese about that. He has done that for his headset and
seems to like it.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Thursday, July 09, 2009 1:14 PM
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html ?
$169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 8
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| Subject: | Replacing -52 compressor |
Wasn't getting pressure to build up while flying again. (last time was the snot
valve not seating) This time I disconnected the line from the compressor to the
snot valve, started it up, no pressure coming from compressor, zero. So, question
is how difficult is it to remove and replace the compressor, looks incredibly
difficult to get at all the attachment bolts.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252326#252326
Message 9
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| Subject: | Replacing -52 compressor |
I am not qualified to discuss the compressor removal Bill, as I only
watched it being replaced one time, BUT ....
It very well could be your compressor that is bad, but before you go
yanking it, one of the things I usually do is to hook up 500 psi air and
blow it back in the line you just disconnected at the snot valve, but
blow it in BACKWARDS! I mean, reverse pressurize the line so it is
putting pressure back towards the compressor.
Why?
Because it is very easy to have a cracked line .... The line that runs
from the compressor to the snot valve breaks ALL THE TIME. So much so
that Doug Sapp sells a hose to replace the original one with a flex
line. Smart thing to do by the way in my opinion, but some disagree.
Whatever. The bottom line is that you could easily have a cracked line,
a broken flare, etc.
Another place to be especially aware of is the BANJO FITTING! This
thing leaks ALL the time! If you are testing this thing by running the
engine and putting your finger over the line to see if any air is coming
out, this can easily lead you to believe you have a bad compressor when
in fact what you might have is just a bad leak.
Hooking up air and blowing it backwards into that line will allow you to
listen for leaks. There may be other ways to do it, but that is what I
have done personally. There is a one way check valve up past the Banjo
fitting on the compressor that will keep the air from going back into
the compressor.
So yes.. It could be a bad compressor... But if you haven't checked
carefully... It could also be a leaking line.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bill1200
Sent: Thursday, July 09, 2009 2:52 PM
Subject: Yak-List: Replacing -52 compressor
Wasn't getting pressure to build up while flying again. (last time was
the snot valve not seating) This time I disconnected the line from the
compressor to the snot valve, started it up, no pressure coming from
compressor, zero. So, question is how difficult is it to remove and
replace the compressor, looks incredibly difficult to get at all the
attachment bolts.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252326#252326
Message 10
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| Subject: | Interference Becker 4201 radio |
Interesting idea. I have never done it, but it makes sense.
I also have the XCOM in my UTVA-66 and it is a great radio.
Thanks for this posting Jim.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jim Bernier
Sent: Thursday, July 09, 2009 9:04 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Guys
We have another option with the DC - DC converter. In my case I used it
as a battery balancer. I still tapped off the 12 volt battery to supply
the 12 volt buss. And since the energy draw was uneven, I placed the
battery balancer/converter between the two 12 volt batteries in order to
supply more power to the 12 volt bussed battery. It works great. No
problem at all. And if the converter goes down I still have power to the
radio and others. I can turn off the balancer with a remote switch. I
monitor the 12 volt buss with the volt meter. I have an auto 24 volt
alternator that I can turn on and off remotely. This allows me to tell
if the alternator is working just by the voltage jump when I turn it on.
The balancer is checked the same way, a slight voltage jump when turned
on. I didn't choose a Becker, I have the XCOM radio.
Jim B
Message 11
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| Subject: | Interference Becker 4201 radio |
That is another tidbit in the puzzle Jan. Your device is really just a
basic PMG alternator. Uses a bridge rectifier and a big filter
electrolytic cap plus a basic voltage regulator... And you have no
noise. I really am thinking just adding a big ole cap to the 12 volt
side might really help with the noise.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis
Sent: Thursday, July 09, 2009 3:03 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
That's correct, Mark! It's the small 10 amp model, and I have a big
electrolytic capacitor behind the rectifier/regulator.
Jan
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 juli 2009 22:20
Subject: RE: Yak-List: Interference Becker 4201 radio
--> Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
Jan, it is very likely with that model that you have installed a big
filter capacitor with the system. Big Blue thing. Usually comes with
the over-voltage protection kit for the small B&C. Do you have the 10
amp PMG model, or the 35 amp with a field wire?
Don't limit it to just the generator versus alternator Jan. No one has
yet determined the exact source for all this noise that everyone is
reporting. Doc has installed filters that help, but that does not
really identify what is causing it. It may help in determining how it
is getting INTO the radio. Craig seems to indicate it is coming in the
antenna. Doc seems to indicate it is coming in via the power wiring.
No one really knows what is making the noise to begin with.
Consider yourself lucky.
Mark Bitterlich
P.s. Install the digital tach using the P lead connections and see what
happens.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Jan Mevis
Sent: Wednesday, July 08, 2009 3:48 PM
Subject: RE: Yak-List: Interference Becker 4201 radio
I have a DC-DC- convertor on the battery, and NO filter on the 12 volts
line to the radio. The Becker 4201 on my Yak 50 works perfectly well.
Perhaps one major difference: I have a B&C alternator and thus electric
voltage regulator ? Is it possible that this generates far less noise
than the Russian generator and Russian voltage regulator ?
Jan
YK50
RA2005K
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 8 juli 2009 21:33
Subject: RE: Yak-List: Interference Becker 4201 radio
--> Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
Just a note to Hans and anyone else.
What Hans found (thanks to Dennis for remembering to check for it) is a
12 volt radio connected in-between two 12 volt batteries connected in
series to provide 24 volts.
Actually Hans, doing it that way does allow the battery to act as a
fairly good filter (of sorts) to generator noise, and it still does not
explain in any way why connecting your GPS cable did what it did. That
little phenomenon is another strong bit of evidence that the Becker
noise is all coming in from the DC power line and not the antenna.
That aside, hooking any 12 volt accessory up like this is very do-able,
and will work just fine, for awhile.
What eventually happens is that you end up putting more load on one
battery than the other one as they are operated. Eventually, the one
battery won't charge quite as perfectly as it should. This can be very
hard to detect, because your cockpit meter is looking at BOTH of them
and not just the one that is powering your radio, or whatever else.
Eventually, the batteries start to charge unevenly, and the voltage on
the one supplying the 12 volts starts to fail faster than the other one.
The end result is unpredictable voltage to the "12 volt device(s)".
This can damage them. Not right away. It takes awhile.
Another thing that can happen is that as you put on a heavy 28 volt
load, the voltage in the middle of the 2 batteries goes even more off,
again giving the potential for voltages being present that you would
never use intentionally, and that you know very little about.
If you change the batteries regularly, you can get away with this
approach, but it really is a bad design choice.
As Hans has noted, the best choice is to use a DC to DC converter, that
runs off of 28 volts, and steps down to 12 volts. It also then is a
good idea to put a line filter and a good sized cap on the output line
for further filtering. Then put a switch on the INPUT to this DC to DC
converter to allow it to be turned OFF when you want it to be. Or have
it wired to a circuit breaker.. Whatever.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Wednesday, July 08, 2009 10:13 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
I'm going to try to install the in line filter during the coming
weekend. I wanna have this solved. In the meantime, thanks to Dennis, I
found that the Becker 12v is connected directly to the series connection
wire of the 12v batteries, i.e. there is no DC-DC converter used and
this means that the "dirty" power from the generator will go unfiltered
in to the Becker.
I did some measurements here at my company and found the Becker to be a
poor performer from an RF point of view, but there is nothing I can do
about that then buy myself another one from a different brand that
is....
However, before I get to that point I'll try a real dc-dc converter in
combination with the Lonestar in-line filter.
I'll keep you guys posted on the progress.
Hans Oortman, MBA, Ph.D.
CEO
STN BV
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Roger Kemp M.D.
Verzonden: woensdag 8 juli 2009 15:46
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Han's,
This is a problem that I have with my 50. There are three connections on
the filter. One goes to ground, one to the DC power supply and the other
to the power supply in line to the Becker Radio. I simply inserted the
filter into the power supply line from the DC converter to the radio. I
have my Buss Bar wired so the com switch takes 24 volt current to the DC
converter first with obviously the outline from the converter carrying
12 volt current to the Becker.
Agree, do not know why the Becker is so sensitive to RF noise. I even
changed out the radio for another Becker I had on the shelf. They both
did the same thing. The filters have helped immensely.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 9:23 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
Yeah...I do have the in line filter as well as the capacitor for the
generator but did not install it yet. Have not found a place to install
it safely. I need to do that. I assume you installed it close to the
busbar in the area of the switches on the left side of the plane and
then with a shielded wire to the VHF??
What I don't understand though is why the Becker radio is so sensitive
for noise on the dc supply??
Hans
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Roger Kemp M.D.
Verzonden: vrijdag 3 juli 2009 15:45
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Hans,
I also added a filter in line with the power supply from my converter to
the Becker radio. It to came from Lone Star Avionics.
http://www.lonestaraviation.com/product_details.asp?Product_Name=The
Eliminator. With the mag filters and the DC filter in line, the noise
has been pretty much eliminated.
The other place to check in your Tack generator shielding.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 8:02 AM
Subject: Yak-List: Interference Becker 4201 radio
Mark,
I finally made the time available to do the tests/modifications we have
talked about with respect to the interference on a Becker VHF radio in
my Yak52.
I installed the Lonestar P-lead filters on both mags. Found that both
screens of the p-leads are in perfect condition but installed the
filters , just to make sure.
The screening can now be called perfect. I have made a special copper
"plug"
to fill up for the thinner wires on the filters. The screens of the
filter wires have been soldered to those "plugs" and locked in the mags.
Everything has been fixed thoroughly and inspected for grounding.
All OK so far. Started the engine and found no difference on the VHF,
i.e.
the interference is still there. That means: the squelch is opened by
the interference. Switching off the squelch it appears that there is no
constant noise level but more of a kind of rattling noise which opens
the squelch.
Checked antenna...found no problem or loose wires. Swr is within the
airband
1 : 1.5 max.
So in my humble opinion there is only 1 thing left: the interference is
going into the vhf via the power supply or the power is that "dirty"
that it is picked up by the vhf antenna.....
I know that the Becker gets its power via a dc-dc converter of some
sort, after all the Yak has 24v standard power. Is the 12 volts present
on any standard Yak or is there a built in down converter somewhere??
What is the "voltage adjustment" screw meant for in the front cockpit??
Did some tests with the GPS also. When the GPS is connected to the power
plug and switched on, the noise level on the VHF opens the squelch which
makes it unuseable in flight.
Switched off gps: noise is reduced but squelch is still opened 6 out of
10 sec. Disconnected power supply lead from GPS but kept it connected to
the plane, same result as GPS being switched off, i.e. the VHF is
picking up interference via its antenna but the noise is generated one
way or the other on the power bus??
I have come to a point of saturation in my mind about the cause of this.
Taking a scope into the cockpit is probably the only way to find out
whether there is any noise on the power bus.
Probably another way is to power the VHF via the cigarette ligher
connector with another dc-dc converter. Thus bypassing the present
circuitry but still using the power on board.
Any suggestions, thoughts are welcomed!
Hans
RA3326K
Mob: +31 653 286022
Message 12
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| Subject: | Interference Becker 4201 radio |
I have about 15 different Astron power supplies.
I have seen the one you mention.
Every single product from this company is some of the best stuff made at
a fair price. They are also very easy to repair.
Highly concur with Gary's commments.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of
nc69666@aol.com
Sent: Thursday, July 09, 2009 1:56 AM
Subject: Re: Yak-List: Interference Becker 4201 radio
Guys, I have a inexpensive and very reliable solution to you clean 12
Volts power needs. About 13 years ago when I wanted 12 Volts in my CJ I
went to the local Ham Radio Store, and purchased a DC power converter,
it is manufactured by Astron, it converts 24V to 12V, 20 amps output,
extremely reliable and very highly filtered, I have never had any noise
or interference in my 12 V electrical supply, radios are happy as can
be, it gives you all the 12 V you should ever need. The cost at that
time was about $85.00.. Very simple solution.. Best of Luck.
Gary Gabbard
Las Vegas, NV
CJ, N22YK
-----Original Message-----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mark.bitterlich@navy.mil>
Sent: Wed, Jul 8, 2009 12:32 pm
Subject: RE: Yak-List: Interference Becker 4201 radio
--> Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
Just a note to Hans and anyone else.
What Hans found (thanks to Dennis for remembering to check for it) is a
12 volt radio connected in-between two 12 volt batteries connected in
series to provide 24 volts.20
Actually Hans, doing it that way does allow the battery to act as a
fairly good filter (of sorts) to generator noise, and it still does not
explain in any way why connecting your GPS cable did what it did. That
little phenomenon is another strong bit of evidence that the Becker
noise is all coming in from the DC power line and not the antenna.
That aside, hooking any 12 volt accessory up like this is very do-able,
and will work just fine, for awhile.
What eventually happens is that you end up putting more load on one
battery than the other one as they are operated. Eventually, the one
battery won't charge quite as perfectly as it should. This can be very
hard to detect, because your cockpit meter is looking at BOTH of them
and not just the one that is powering your radio, or whatever else.
Eventually, the batteries start to charge unevenly, and the voltage on
the one supplying the 12 volts starts to fail faster than the other one.
The end result is unpredictable voltage to the "12 volt device(s)".
This can damage them. Not right away. It takes awhile.
Another thing that can happen is that as you put on a heavy 28 volt
load, the voltage in the middle of the 2 batteries goes even more off,
again giving the potential for voltages being present that you would
never use intentionally, and that you know very little about.
If you change the batteries regularly, you can get away with this
approach, but it really is a bad design choice.
As Hans has noted, the best choice is to use a DC to DC converter, that
runs off of 28 volts, and steps down to 12 volts. It also then is a
good idea to put a line filter and a good sized cap on the output line
for further filtering. Then put a switch on the INPUT to this DC to DC
converter to allow it to be turned OFF when you want it to be. Or have
it wired to a circuit breaker.. Whatever.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] On Behalf Of Hans
Oortman
Sent: Wednesday, July 08, 2009 10:13 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
I'm going to try to install the in line filter during the coming
weekend. I wanna have this solved. In the meantime, thanks to Dennis, I
found that the Becker 12v is connected directly to the series connection
wire of the 12v batteries, i.e. there is no DC-DC converter used and
this means that the "dirty" power from the generator will go unfiltered
in to the Becker.
I did some measurements here at my company and found the Becker to be a
poor performer from an RF point of view, but there is nothing I can do
about that then buy myself another one from a different brand that
is....
However, before I get to that point I'll try a real dc-dc converter in
combination with the Lonestar in-line filter.
I'll keep you guys posted on the progress.
Hans Oortman, MBA, Ph.D.
CEO
STN BV
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] Namens Roger Kemp M.D.
Verzonden: woensdag 8 juli 2009 15:46
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Han's,
This is a problem that I have with my 50. There are three connections on
the filter. One goes to ground, one to the DC power supply and the other
to the power supply in line to the Becker Radio. I simply inserted the
filter into the power supply line from the DC converter to the radio. I
have my Buss Bar wired so the com switch takes 24 volt current to the DC
converter first with obviously the outline from the converter carrying
12 volt current to the Becker.
Agree, do not know why the Becker is so sensitive to RF noise. I even
changed out the radio for another Becker I had on the shelf. They both
did the same thing. The filters have helped immensely.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com <mailto:owner
-yak-list-server@matronics.com?> ] On Behalf Of Hans Oortman
Sent: Friday, July 03, 2009 9:23 AM
Subject: RE: Yak-List: Interference Becker 4201 radio
Doc,
Yeah...I do have the in line filter as well as the capacitor for the
generator but did not install it yet. Have not found a place to install
it safely. I need to do that. I assume you installed it close to the
busbar in the area of the switches on the left side of the plane and
then with a shielded wire to the VHF??
What I don't understand though is why the Becker radio is so sensitive
for noise on the dc supply??
Hans
-----Oorspronkelijk bericht-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] Namens Roger Kemp M.D.
Verzonden: vrijdag 3 juli 2009 15:45
Aan: yak-list@matronics.com
Onderwerp: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Hans,
I also added a filter in line with the power supply from my converter to
the Becker radio. It to came from Lone Star Avionics.
http://www.lonestaraviation.com/product_details.a
sp?Product_Name=The
<http://www.lonestaraviation.com/product_details.asp?Product_Name=The>
Eliminator. With the mag filters and the DC filter in line, the noise
has been pretty much eliminated.
The other place to check in your Tack generator shielding.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] On Behalf Of Hans
Oortman
Sent: Friday, July 03, 2009 8:02 AM
Subject: Yak-List: Interference Becker 4201 radio
Mark,
I finally made the time available to do the tests/modifications we have
talked about with respect to the interference on a Becker VHF radio in
my Yak52.
I installed the Lonestar P-lead filters on both mags. Found that both
screens of the p-leads are in perfect condition but installed the
filters , just to make sure.
The screening can now be called perfect. I have made a special copper
"plug"
to fill up for the thinner wires on the filters. The screens of the
filter wires have been soldered to those "plugs" and locked in the mags.
Everything has been fixed thoroughly and inspected for grounding.
All OK so far. Started the engine and found no difference on the VHF,
i.e.
the interference is still there. That means: the squelch is opened by
the interference. Switching off the squelch it appears that there is no
constant noise level but more of a kind o f rattling noise which opens
the squelch.
Checked antenna...found no problem or loose wires. Swr is within the
airband
1 : 1.5 max.
So in my humble opinion there is only 1 thing left: the interference is
going into the vhf via the power supply or the power is that "dirty"
that it is picked up by the vhf antenna.....
I know that the Becker gets its power via a dc-dc converter of some
sort, after all the Yak has 24v standard power. Is the 12 volts present
on any standard Yak or is there a built in down converter somewhere??
What is the "voltage adjustment" screw meant for in the front cockpit??
Did some tests with the GPS also. When the GPS is connected to the power
plug and switched on, the noise level on the VHF opens the squelch which
makes it unuseable in flight.
Switched off gps: noise is reduced but squelch is still opened 6 out of
10 sec. Disconnected power supply lead from GPS but kept it connected to
the plane, same result as GPS being switched off, i.e. the VHF is
picking up interference via its antenna but the noise is generated one
way or the other on the power bus??
I have come to a point of saturation in my mind about the cause of this.
Taking a scope into the cockpit is probably the only way to find out
whether there is any noise on the power bus.
Probably another way is to power the VHF via the cigarette ligher
connector with another dc-dc converter. Thus bypassing the present
circuitry but still using the power on board.
Any suggestions, t
houghts are welcomed!
Hans
RA3326K
Mob: +31 653 286022
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get="_blank">http://www.matronics.com/Navigator?Yak-List
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=======================
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Stay cool with this summer's hottest movies. Moviefone brings you
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Message 13
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| Subject: | Interference Becker 4201 radio |
Roger that.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
M.D.
Sent: Wednesday, July 08, 2009 5:47 PM
Subject: RE: Yak-List: Interference Becker 4201 radio
--> <viperdoc@mindspring.com>
Mark,
Mine was power input noise. Changing the antenna coax did nothing for
it.
Doc
Message 14
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Rieder, David A (AZ76) would like to recall the message, "Yak-List: ANR
conversion".
Message 15
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Just checking to make sure the plate isn't lost in the mail.
As efficient as you are I'm sure it is on it's way. :>).
Hope all is well. What's the next trip?
Magoo
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of
vectorwarbirds@aol.com
Sent: Thursday, July 09, 2009 11:36 AM
Subject: Re: Yak-List: ANR conversion
Esteemed One!
I have done four converts with their units, two in David Clarks and two
in helmets. They work great, never failed, no problems. Its been about
four and five years now. Of course they are not Bose but then... They
do have a slight amount of background hiss, but slight as I said. I
researched this before I did the next two and found this is a common
problem unless you are spending the big dollars. It has never bothered
me as I am hearing voices anyway. Hopefully the pink elephants will
stop talking soon.
Hope this helps!
Bunndini
One thing I did do is put a dab of silicone on the small wires on where
they are soldered to the circuit boards, as I did break one off
installing once. So just sercured them here and there for the future.
-----Original Message-----
From: doug sapp <dougsappllc@gmail.com>
Sent: Thu, Jul 9, 2009 11:13 am
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html
? $169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
________________________________
Stay cool with this summer's hottest movies. Moviefone brings you
trailers, celebrities, movie showtimes and tickets
<http://www.moviefone.com/summer-movies?ncid=emlweusmovi00000004> !
Message 16
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| Subject: | Replacing -52 compressor |
It can also be the shear pin coupling. So the compressor may still be ok,
but you have to unmount it to check or replace the shear pin (after having
done the tests Mark indicated). Replacing the compressor takes quite some
time if you don't have the Russian tools (and even with the Russian tools,
it's a time demanding job; you'll need a lot of patience). Only six bolts,
but three of them of course at an inaccessible place.
Jan
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: donderdag 9 juli 2009 21:15
Subject: RE: Yak-List: Replacing -52 compressor
MALS-14 64E" <mark.bitterlich@navy.mil>
I am not qualified to discuss the compressor removal Bill, as I only
watched it being replaced one time, BUT ....
It very well could be your compressor that is bad, but before you go
yanking it, one of the things I usually do is to hook up 500 psi air and
blow it back in the line you just disconnected at the snot valve, but
blow it in BACKWARDS! I mean, reverse pressurize the line so it is
putting pressure back towards the compressor.
Why?
Because it is very easy to have a cracked line .... The line that runs
from the compressor to the snot valve breaks ALL THE TIME. So much so
that Doug Sapp sells a hose to replace the original one with a flex
line. Smart thing to do by the way in my opinion, but some disagree.
Whatever. The bottom line is that you could easily have a cracked line,
a broken flare, etc.
Another place to be especially aware of is the BANJO FITTING! This
thing leaks ALL the time! If you are testing this thing by running the
engine and putting your finger over the line to see if any air is coming
out, this can easily lead you to believe you have a bad compressor when
in fact what you might have is just a bad leak.
Hooking up air and blowing it backwards into that line will allow you to
listen for leaks. There may be other ways to do it, but that is what I
have done personally. There is a one way check valve up past the Banjo
fitting on the compressor that will keep the air from going back into
the compressor.
So yes.. It could be a bad compressor... But if you haven't checked
carefully... It could also be a leaking line.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bill1200
Sent: Thursday, July 09, 2009 2:52 PM
Subject: Yak-List: Replacing -52 compressor
Wasn't getting pressure to build up while flying again. (last time was
the snot valve not seating) This time I disconnected the line from the
compressor to the snot valve, started it up, no pressure coming from
compressor, zero. So, question is how difficult is it to remove and
replace the compressor, looks incredibly difficult to get at all the
attachment bolts.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252326#252326
Message 17
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| Subject: | Re: ANR conversion |
Hi Doug
I have that system in 2 helmets and a Dave Clark headset and it works
great in my T-6. It's almost overkill in the CJ. I would go with the
manufacturer in TX. your listed outfit is a distributor. I have gotten
great service including free replacement parts from them. It is
headsetsinc.com.
Jim Griffin
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Thursday, July 09, 2009 1:13 PM
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html
? $169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 18
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| Subject: | Re: ANR conversion |
Works great and doesn't take very long to install the conversion. Maybe
less than 2 hours if you do a really neat job. You will definitely need
a "pencil" soldering iron to do it properly.
Dennis
----- Original Message -----
From: Roger Kemp M.D.
To: yak-list@matronics.com
Sent: Thursday, July 09, 2009 1:51 PM
Subject: RE: Yak-List: ANR conversion
Talk to Dennis Savarese about that. He has done that for his headset
and seems to like it.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of doug sapp
Sent: Thursday, July 09, 2009 1:14 PM
To: yak-list@matronics.com
Subject: Yak-List: ANR conversion
Has anyone out there used, or know the pros and cons of using the ANR
conversion kit from http://www.anr-headsets.com/Html_folder/ANRKits.html
? $169.00 to convert to ANR.
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
http://www.matronics.com/Navigator?Yak-Listhttp://forums.matronics.comhtt
p://www.matronics.com/contribution
Message 19
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| Subject: | Re: Replacing -52 compressor |
Thanks guys, have been talking with Doug. Disconnected the banjo fitting and cleaned
it out. Ran the engine with the banjo fitting off. No air coming from compressor.
One other thing he suggested was a stuck valve in the piston itself.
Will work on that Saturday, not looking good. Appreciate the help.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252408#252408
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