Today's Message Index:
----------------------
1. 01:08 AM - aileron slop (Jon Boede)
2. 05:06 AM - Re: radio noise after installing plug conversion kit (A. Dennis Savarese)
3. 05:39 AM - Re: aileron slop (A. Dennis Savarese)
4. 07:27 AM - Re: radio noise after installing plug conversion kit (Rick Basiliere)
5. 09:02 AM - Re: aileron slop (Doug Sapp)
6. 05:49 PM - Re: aileron slop (Craig Payne)
7. 06:35 PM - Re: radio noise after installing plug conversion kit (Roger Kemp)
8. 06:43 PM - Re: radio noise after installing plug conversion kit (Roger Kemp)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
If you "clamp" one aileron from moving and then wiggle the other one, how
much movement is "ok" before you should consider getting new links?
I have determined that all the slop is being allowed in the last linkage to
the aileron. When I hold one and move the other I can jiggle it about
3/16ths of an inch. Makes me a little nervous.
Jon
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: radio noise after installing plug conversion kit |
Thanks Jan for posting the solution. I'm sure it will help others in the
future.
Dennis
----- Original Message -----
From: "Jan Mevis" <jan.mevis@informavia.be>
Sent: Thursday, February 22, 2007 3:20 PM
Subject: Yak-List: radio noise after installing plug conversion kit
>
> Dear Mark,
>
> THANKS A LOT! Your advise helped me solve the problem : the BNC-connector
> of
> the antenna cable got disassembled! So I HEREBY CONFIRM : THE PLUG
> CONVERSION KIT CABLES ARE NOT THE SOURCE OF THE RADIO NOISE IN MY PLANE!
>
> I was mislead because my radio showed the noise problem after I did the
> plug
> conversion, so it was logical to assume that there was a correlation. For
> one reason or another the antenna cable could move around a bit. And all
> things that are not well strapped in a Yak will cause problems sooner or
> later. I did the test as you suggested, and bingo, problem diagnosed !
>
> Once again, thanks a lot!
>
>
> Jan Mevis
> RA2005K
> YK50
>
> -----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: dinsdag 20 februari 2007 22:48
> To: yak-list@matronics.com
> Subject: RE: Yak-List: White Paper on Russian Generator System
>
> MALS-14 64E" <mark.bitterlich@navy.mil>
>
> Jan,
>
> Let me repeat one thing if I may. If the noise to your radio goes away
> completely when you disconnect the (almost) BNC connector on the back of
> the radio that connects the antenna, then there is absolutely no use in
> messing with the radios wiring what-so-over. Trust me on this one.
> Radio noise can come in via a few different sources. The wires you
> speak of, or the antenna, or both. If you disconnect the coax
> connection to the radio, AT the radio, and all noise goes away
> completely, then all noise is coming in from the antenna itself. Noise
> filters will NEVER stop this type of noise. That is because the radio
> is actually RECEIVING what it is SUPPOSED to be receiving. I.E. "RF
> ENERGY".
>
> As for spark energy.... You mention the spark plug cables. I agree ...
> More or less.... But don't forget that the spark plugs now being used
> are much MUCH better than anything being used before. Leaps and bounds
> better.
>
> If the shielding on the Tach Generator becomes completely disconnected,
> the resultant noise can be so strong that it actually causes DAMAGE to
> the receiver front end in a Balken-5 (sp) model radio flying in a 52. I
> have actually seen that happen and have repaired the damage myself....
> So believe me, it's true.
>
> Pulling the antenna connector off the radio will tell the story.
>
> Mark
>
> P.s. There is ONE very REMOTE possibility that can help if all noise
> STOPS when you pull off the coax cable connector from the radio, and
> that is called "common mode interference". In cases like that, noise
> comes down the shield of the coax and gets into the radio THAT way.
> This can be eliminated by using torroidal chokes on the exerior of the
> coax close to the radio. They look like small donuts, and using the
> right ones are important. Regardless, this still presumes that all
> noise goes away when you disconnect the antenna coax from the radio.
>
> If that does as I expect it to do, and all noise goes away, then put the
> coax back on the radio, and disconnect the connection from the antenna
> itself. It the noise is still gone, it is NOT common mode interference,
> and you either need to turn up the squelch, or eliminate the noise at
> the source.... Not radio wiring.
>
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: aileron slop |
Jon,
IMHO, no slop is acceptable. The slop you've identified may be caused by a
damaged bearing either on one of the bellcranks or at the aileron itself.
Many of the bearings are self aligning bearings and if not properly
maintained over the years (pre Jon Boede), especially the ones exposed to
the elements, can literally fall apart. Dirt and grit are a bearing's worst
enemy. If it were my airplane, I would confirm the cause of the slop and
correct it immediately.
Dennis
----- Original Message -----
From: "Jon Boede" <jonboede@hotmail.com>
Sent: Friday, February 23, 2007 3:06 AM
Subject: Yak-List: aileron slop
>
> If you "clamp" one aileron from moving and then wiggle the other one, how
> much movement is "ok" before you should consider getting new links?
>
> I have determined that all the slop is being allowed in the last linkage
> to the aileron. When I hold one and move the other I can jiggle it about
> 3/16ths of an inch. Makes me a little nervous.
>
> Jon
>
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | radio noise after installing plug conversion kit |
Did my SU-29 about a year ago with auto wires and plugs. Had KX-135 and absolutely
no noise before or after. Installed a GNS430 (Yes, inverted approaches!!!)
flew first yesterday. Beautiful performance. Lovin' it
Rick b
-----Original Message-----
>From: Roger Kemp <viperdoc@mindspring.com>
>Sent: Feb 22, 2007 3:51 PM
>To: yak-list@matronics.com
>Subject: RE: Yak-List: radio noise after installing plug conversion kit
>
>
>Jan,
>Have been lurking and probably should have added something to this issue
>earlier. I did the plug conversion on my 50 also. Had a lot of
>interference/ "buzzing" on the radio. Could only get good signal (clear
>transmissions) from A/C close by or near the AF. Traced it down to the
>Russian radio cable and B/C connectors. I changed out to R 146 cable and
>new B&C connectors with marked improvement. I have a Becker VHF installed
>since I had pulled the Briz radio over a year ago. Had no problems until
>after I did the plug conversion. I had already changed out the antenna from
>the Russian so I knew it was not a West vs East technology issue.. or so I
>thought. I had continued to use the Ru radio cable with new B&C connectors.
>Once I changed the RU cable for R 146 all improved.
>Now I have a buzz and pop at the ends of transmissions. If I turn the
>automatic squelch off I have a continuous buzzing that is only present with
>the engine running. It is not associated with throttle changes. So guess I
>am now going to add a filter to the DC line into the radio to see if that
>fixes it.
>Doc
>
>
>> [Original Message]
>> From: Jan Mevis <jan.mevis@informavia.be>
>> To: <yak-list@matronics.com>
>> Date: 2/22/2007 3:53:21 PM
>> Subject: Yak-List: radio noise after installing plug conversion kit
>>
>>
>> Dear Mark,
>>
>> THANKS A LOT! Your advise helped me solve the problem : the BNC-connector
>of
>> the antenna cable got disassembled! So I HEREBY CONFIRM : THE PLUG
>> CONVERSION KIT CABLES ARE NOT THE SOURCE OF THE RADIO NOISE IN MY PLANE!
>>
>> I was mislead because my radio showed the noise problem after I did the
>plug
>> conversion, so it was logical to assume that there was a correlation. For
>> one reason or another the antenna cable could move around a bit. And all
>> things that are not well strapped in a Yak will cause problems sooner or
>> later. I did the test as you suggested, and bingo, problem diagnosed !
>>
>> Once again, thanks a lot!
>>
>>
>>
>> Jan Mevis
>> RA2005K
>> YK50
>>
>> -----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: dinsdag 20 februari 2007 22:48
>> To: yak-list@matronics.com
>> Subject: RE: Yak-List: White Paper on Russian Generator System
>>
>> MALS-14 64E" <mark.bitterlich@navy.mil>
>>
>> Jan,
>>
>> Let me repeat one thing if I may. If the noise to your radio goes away
>> completely when you disconnect the (almost) BNC connector on the back of
>> the radio that connects the antenna, then there is absolutely no use in
>> messing with the radios wiring what-so-over. Trust me on this one.
>> Radio noise can come in via a few different sources. The wires you
>> speak of, or the antenna, or both. If you disconnect the coax
>> connection to the radio, AT the radio, and all noise goes away
>> completely, then all noise is coming in from the antenna itself. Noise
>> filters will NEVER stop this type of noise. That is because the radio
>> is actually RECEIVING what it is SUPPOSED to be receiving. I.E. "RF
>> ENERGY".
>>
>> As for spark energy.... You mention the spark plug cables. I agree ...
>> More or less.... But don't forget that the spark plugs now being used
>> are much MUCH better than anything being used before. Leaps and bounds
>> better.
>>
>> If the shielding on the Tach Generator becomes completely disconnected,
>> the resultant noise can be so strong that it actually causes DAMAGE to
>> the receiver front end in a Balken-5 (sp) model radio flying in a 52. I
>> have actually seen that happen and have repaired the damage myself....
>> So believe me, it's true.
>>
>> Pulling the antenna connector off the radio will tell the story.
>>
>> Mark
>>
>> P.s. There is ONE very REMOTE possibility that can help if all noise
>> STOPS when you pull off the coax cable connector from the radio, and
>> that is called "common mode interference". In cases like that, noise
>> comes down the shield of the coax and gets into the radio THAT way.
>> This can be eliminated by using torroidal chokes on the exerior of the
>> coax close to the radio. They look like small donuts, and using the
>> right ones are important. Regardless, this still presumes that all
>> noise goes away when you disconnect the antenna coax from the radio.
>>
>> If that does as I expect it to do, and all noise goes away, then put the
>> coax back on the radio, and disconnect the connection from the antenna
>> itself. It the noise is still gone, it is NOT common mode interference,
>> and you either need to turn up the squelch, or eliminate the noise at
>> the source.... Not radio wiring.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: aileron slop |
Jon,
Slop in the ailerons can come from three places. One or more pivot
bearings on the ail are totally gutted, OR the bearing in the end plate
on the inbd end of the aileron is loose (This can jamb the ailerons in
flight if it comes loose), OR your aileron links are shot, which is my
guess. The aileron links H2-5316-00 (actually called #7 pull rod in the
parts book) have 2 bearings in each of them. There are however two
types of aileron links, thin (for earlier CJ's, and thick for the later
CJ's. The bearings can wear out rather rapidly if your aileron stop
bolts are not properly adjusted or the rubber tips are crushed or
missing. The stop bolts are the little bolts which have rubber tips on
them, there is one on each side of the stick in the front cockpit, they
have a lock nut on them, this is where you adjust/limit the travel of
the aileron. There are also stop bolts on the rudder peddles which
limit the travel of the rudder . It takes a while but not using your
gust locks also tends to help destroy the rubber tips on the stop bolts
when the ailerons bang in the wind. I do not know of any published
"slop tolerances" that are acceptable in either the ailerons or the
rudder. That's not saying that your going to fall out of the sky if
you don't fix the problem immediately, but this condition should not go
long without someone taking a very serious look at where the slop is
actually coming from.
Hope all this helps,
Always Yakin,
Doug Sapp
Jon Boede wrote:
>
> If you "clamp" one aileron from moving and then wiggle the other one,
> how much movement is "ok" before you should consider getting new links?
>
> I have determined that all the slop is being allowed in the last
> linkage to the aileron. When I hold one and move the other I can
> jiggle it about 3/16ths of an inch. Makes me a little nervous.
>
> Jon
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: aileron slop |
Doug wrote:
>
> It takes a while but not using your
> gust locks also tends to help destroy the rubber tips on the stop bolts
> when the ailerons bang in the wind.
>
Exactly! That's why I made up industrial strength gust locks that relieve the strain
from the control system. Helps me to sleep at night when "baby" is on the
tiedown. I'm such a firm believer that I now offer these gust locks for sale.
The stuff you buy from Spruce or Sporty's only concentrates loads on a small
area of each control surface; little comfort from wind or snow/ice loads when
outside.
I even put them on when parked in group hangers. I've seen more damage to my airplanes
in group hangers than I have on tiedowns.
Once I saw what the propwash from a DC-3 did to a C-175 owned by a friend, nasty
damage on the empennage. He used the yoke pin type lock that did nothing to
protect the actual surfaces or cable system.
Craig Payne
cpayne@joimail.com
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | radio noise after installing plug conversion kit |
Rick,
Just remember to push not pull at the MAP!
Doc
> [Original Message]
> From: Rick Basiliere <discrab@earthlink.net>
> To: <yak-list@matronics.com>
> Date: 2/23/2007 9:36:26 AM
> Subject: RE: Yak-List: radio noise after installing plug conversion kit
>
>
> Did my SU-29 about a year ago with auto wires and plugs. Had KX-135 and
absolutely no noise before or after. Installed a GNS430 (Yes, inverted
approaches!!!) flew first yesterday. Beautiful performance. Lovin' it
> Rick b
>
> -----Original Message-----
> >From: Roger Kemp <viperdoc@mindspring.com>
> >Sent: Feb 22, 2007 3:51 PM
> >To: yak-list@matronics.com
> >Subject: RE: Yak-List: radio noise after installing plug conversion kit
> >
> >
> >Jan,
> >Have been lurking and probably should have added something to this issue
> >earlier. I did the plug conversion on my 50 also. Had a lot of
> >interference/ "buzzing" on the radio. Could only get good signal (clear
> >transmissions) from A/C close by or near the AF. Traced it down to the
> >Russian radio cable and B/C connectors. I changed out to R 146 cable and
> >new B&C connectors with marked improvement. I have a Becker VHF installed
> >since I had pulled the Briz radio over a year ago. Had no problems until
> >after I did the plug conversion. I had already changed out the antenna
from
> >the Russian so I knew it was not a West vs East technology issue.. or so
I
> >thought. I had continued to use the Ru radio cable with new B&C
connectors.
> >Once I changed the RU cable for R 146 all improved.
> >Now I have a buzz and pop at the ends of transmissions. If I turn the
> >automatic squelch off I have a continuous buzzing that is only present
with
> >the engine running. It is not associated with throttle changes. So guess
I
> >am now going to add a filter to the DC line into the radio to see if that
> >fixes it.
> >Doc
> >
> >
> >> [Original Message]
> >> From: Jan Mevis <jan.mevis@informavia.be>
> >> To: <yak-list@matronics.com>
> >> Date: 2/22/2007 3:53:21 PM
> >> Subject: Yak-List: radio noise after installing plug conversion kit
> >>
> >>
> >> Dear Mark,
> >>
> >> THANKS A LOT! Your advise helped me solve the problem : the
BNC-connector
> >of
> >> the antenna cable got disassembled! So I HEREBY CONFIRM : THE PLUG
> >> CONVERSION KIT CABLES ARE NOT THE SOURCE OF THE RADIO NOISE IN MY
PLANE!
> >>
> >> I was mislead because my radio showed the noise problem after I did the
> >plug
> >> conversion, so it was logical to assume that there was a correlation.
For
> >> one reason or another the antenna cable could move around a bit. And
all
> >> things that are not well strapped in a Yak will cause problems sooner
or
> >> later. I did the test as you suggested, and bingo, problem diagnosed !
> >>
> >> Once again, thanks a lot!
> >>
> >>
> >>
> >> Jan Mevis
> >> RA2005K
> >> YK50
> >>
> >> -----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: dinsdag 20 februari 2007 22:48
> >> To: yak-list@matronics.com
> >> Subject: RE: Yak-List: White Paper on Russian Generator System
> >>
Point,
> >> MALS-14 64E" <mark.bitterlich@navy.mil>
> >>
> >> Jan,
> >>
> >> Let me repeat one thing if I may. If the noise to your radio goes away
> >> completely when you disconnect the (almost) BNC connector on the back
of
> >> the radio that connects the antenna, then there is absolutely no use in
> >> messing with the radios wiring what-so-over. Trust me on this one.
> >> Radio noise can come in via a few different sources. The wires you
> >> speak of, or the antenna, or both. If you disconnect the coax
> >> connection to the radio, AT the radio, and all noise goes away
> >> completely, then all noise is coming in from the antenna itself. Noise
> >> filters will NEVER stop this type of noise. That is because the radio
> >> is actually RECEIVING what it is SUPPOSED to be receiving. I.E. "RF
> >> ENERGY".
> >>
> >> As for spark energy.... You mention the spark plug cables. I agree ...
> >> More or less.... But don't forget that the spark plugs now being used
> >> are much MUCH better than anything being used before. Leaps and bounds
> >> better.
> >>
> >> If the shielding on the Tach Generator becomes completely disconnected,
> >> the resultant noise can be so strong that it actually causes DAMAGE to
> >> the receiver front end in a Balken-5 (sp) model radio flying in a 52.
I
> >> have actually seen that happen and have repaired the damage myself....
> >> So believe me, it's true.
> >>
> >> Pulling the antenna connector off the radio will tell the story.
> >>
> >> Mark
> >>
> >> P.s. There is ONE very REMOTE possibility that can help if all noise
> >> STOPS when you pull off the coax cable connector from the radio, and
> >> that is called "common mode interference". In cases like that, noise
> >> comes down the shield of the coax and gets into the radio THAT way.
> >> This can be eliminated by using torroidal chokes on the exerior of the
> >> coax close to the radio. They look like small donuts, and using the
> >> right ones are important. Regardless, this still presumes that all
> >> noise goes away when you disconnect the antenna coax from the radio.
> >>
> >> If that does as I expect it to do, and all noise goes away, then put
the
> >> coax back on the radio, and disconnect the connection from the antenna
> >> itself. It the noise is still gone, it is NOT common mode
interference,
> >> and you either need to turn up the squelch, or eliminate the noise at
> >> the source.... Not radio wiring.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
>
>
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | radio noise after installing plug conversion kit |
Jan,
Hope you do not have to do that. I suspect my issues were coincidental also.
Doc
> [Original Message]
> From: Jan Mevis <jan.mevis@informavia.be>
> To: <yak-list@matronics.com>
> Date: 2/23/2007 1:19:00 AM
> Subject: RE: Yak-List: radio noise after installing plug conversion kit
>
>
> Doc,
>
> It is as if you've got to change it all : either the whole Russian radio
> system, or a complete western system. Maybe a problem with impedance
changes
> etc? I had to modify the microphone connections so that I could use a Dave
> Clark headset (the Russian push-to-talk system did not put one connector
of
> the microphone to ground when speaking).
>
> My Briz (which I put in place for a Ziabrik) works reasonably well. But I
> had the trouble putting a BNC connector on the Russian antenna cable (the
> ziabrik needed a very small connector, comparable to what is used in WIFI
> equipment). Unfortunately until now I could not find a connector that
really
> fits. That's also the reason why the connector got damaged on my plane
after
> 5 months of intensive use. It's an absolute coincidence that this happened
> just after changing the plug cables.
>
> But I do also only have clear transmissions when I'm close by or near
other
> radio stations. So I 'd better change the whole antenna system, I fear.
>
> Thanks for the input! This is also very helpful!
>
> All the best,
>
> Jan
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
> Sent: donderdag 22 februari 2007 23:52
> To: yak-list@matronics.com
> Subject: RE: Yak-List: radio noise after installing plug conversion kit
>
>
> Jan,
> Have been lurking and probably should have added something to this issue
> earlier. I did the plug conversion on my 50 also. Had a lot of
> interference/ "buzzing" on the radio. Could only get good signal (clear
> transmissions) from A/C close by or near the AF. Traced it down to the
> Russian radio cable and B/C connectors. I changed out to R 146 cable and
> new B&C connectors with marked improvement. I have a Becker VHF installed
> since I had pulled the Briz radio over a year ago. Had no problems until
> after I did the plug conversion. I had already changed out the antenna
from
> the Russian so I knew it was not a West vs East technology issue.. or so I
> thought. I had continued to use the Ru radio cable with new B&C
connectors.
> Once I changed the RU cable for R 146 all improved.
> Now I have a buzz and pop at the ends of transmissions. If I turn the
> automatic squelch off I have a continuous buzzing that is only present
with
> the engine running. It is not associated with throttle changes. So guess I
> am now going to add a filter to the DC line into the radio to see if that
> fixes it.
> Doc
>
>
> > [Original Message]
> > From: Jan Mevis <jan.mevis@informavia.be>
> > To: <yak-list@matronics.com>
> > Date: 2/22/2007 3:53:21 PM
> > Subject: Yak-List: radio noise after installing plug conversion kit
> >
> >
> > Dear Mark,
> >
> > THANKS A LOT! Your advise helped me solve the problem : the
BNC-connector
> of
> > the antenna cable got disassembled! So I HEREBY CONFIRM : THE PLUG
> > CONVERSION KIT CABLES ARE NOT THE SOURCE OF THE RADIO NOISE IN MY PLANE!
> >
> > I was mislead because my radio showed the noise problem after I did the
> plug
> > conversion, so it was logical to assume that there was a correlation.
For
> > one reason or another the antenna cable could move around a bit. And all
> > things that are not well strapped in a Yak will cause problems sooner or
> > later. I did the test as you suggested, and bingo, problem diagnosed !
> >
> > Once again, thanks a lot!
> >
> >
> >
> > Jan Mevis
> > RA2005K
> > YK50
> >
> > -----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: dinsdag 20 februari 2007 22:48
> > To: yak-list@matronics.com
> > Subject: RE: Yak-List: White Paper on Russian Generator System
> >
Point,
> > MALS-14 64E" <mark.bitterlich@navy.mil>
> >
> > Jan,
> >
> > Let me repeat one thing if I may. If the noise to your radio goes away
> > completely when you disconnect the (almost) BNC connector on the back of
> > the radio that connects the antenna, then there is absolutely no use in
> > messing with the radios wiring what-so-over. Trust me on this one.
> > Radio noise can come in via a few different sources. The wires you
> > speak of, or the antenna, or both. If you disconnect the coax
> > connection to the radio, AT the radio, and all noise goes away
> > completely, then all noise is coming in from the antenna itself. Noise
> > filters will NEVER stop this type of noise. That is because the radio
> > is actually RECEIVING what it is SUPPOSED to be receiving. I.E. "RF
> > ENERGY".
> >
> > As for spark energy.... You mention the spark plug cables. I agree ...
> > More or less.... But don't forget that the spark plugs now being used
> > are much MUCH better than anything being used before. Leaps and bounds
> > better.
> >
> > If the shielding on the Tach Generator becomes completely disconnected,
> > the resultant noise can be so strong that it actually causes DAMAGE to
> > the receiver front end in a Balken-5 (sp) model radio flying in a 52. I
> > have actually seen that happen and have repaired the damage myself....
> > So believe me, it's true.
> >
> > Pulling the antenna connector off the radio will tell the story.
> >
> > Mark
> >
> > P.s. There is ONE very REMOTE possibility that can help if all noise
> > STOPS when you pull off the coax cable connector from the radio, and
> > that is called "common mode interference". In cases like that, noise
> > comes down the shield of the coax and gets into the radio THAT way.
> > This can be eliminated by using torroidal chokes on the exerior of the
> > coax close to the radio. They look like small donuts, and using the
> > right ones are important. Regardless, this still presumes that all
> > noise goes away when you disconnect the antenna coax from the radio.
> >
> > If that does as I expect it to do, and all noise goes away, then put the
> > coax back on the radio, and disconnect the connection from the antenna
> > itself. It the noise is still gone, it is NOT common mode interference,
> > and you either need to turn up the squelch, or eliminate the noise at
> > the source.... Not radio wiring.
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|