Today's Message Index:
----------------------
1. 07:00 AM - 2 comms 1 antenna (Greg Scott)
2. 09:38 AM - Re: Aspen Avionics panel: Too good to be true? (Rob Housman)
3. 05:06 PM - Battery Contactors (Noel Karppinen)
4. 05:27 PM - Re: Battery Contactors (Ron Quillin)
5. 05:59 PM - Re: Battery Contactors (Richard T. Schaefer)
6. 07:20 PM - Re: Battery Question? (BobsV35B@aol.com)
7. 07:27 PM - Re: ANL 60 (Kevin Boddicker)
8. 07:36 PM - Re: Aspen Avionics panel: Too good to be true? (Michael Pereira)
9. 08:43 PM - Re: Battery Question? (Richard E. Tasker)
Message 1
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Subject: | 2 comms 1 antenna |
Hi,
A newcomer to this list so forgive me if this question(or similar) has
been posed before. I am building an RV9 with 2 comm radio's, a Microair
M760 with an ICOM A210 and both thru a PM3000 Intercom. My plan is to
have a single Antenna and use a 4 pole 2 way switch, 3 poles to switch
the audio and the 3rd. to control a 50 Ohm Coax switching relay to
connect the antenna. Any forseen problems with this? if so should I use
2 Antenna? this I thought would risk damage to the receiver input of the
non transmitting Comm.
Greg Scott
RV4 G - RVIV
U.K.
Message 2
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Subject: | Aspen Avionics panel: Too good to be true? |
In re: HDMI cable
I bought a short (1.5 ft) HDMI cable for US$5.25. Longer cables are similarly
inexpensive at http://www.mycablemart.com/
Best regards,
Rob Housman
Irvine, California
Europa XS Tri-Gear
S/N A070
Airframe complete
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
psiegel@fuse.net
Sent: Saturday, December 15, 2007 4:12 AM
Subject: AeroElectric-List: Aspen Avionics panel: Too good to be true?
I'm finding it impossible to keep a vacuum driven artificial horizon healthy
in the panel of my 180 horse Super Cub. The new Aspen Avionics all electric
Horizon/HSI looks like a great alternative! And compared to other similar
avionics packages, it is very economical! Anybody have thoughts on the Aspen
unit?
Speaking of economical...while looking at plasma TV's and HD video players the
other day, I discovered that they want over a hundred bucks just for the cable
that runs between the two units!!! Is that cable made of unobtainium or what?
I sense a consumer rip-off, but the nice salesperson assure me of the fact
that the quality of the picture is dependent on getting the ex$pensive cable!
And I thought avionics stuff was cost intensive!
Paul Siegel N4431Z
Message 3
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Subject: | Battery Contactors |
I have just started wiring up a Jabiru 3300 installation, which includes a
battery contactor. I wanted to test that the basic power wiring was OK
before going too far with the wiring, so I connected a bench power supply
to the input side of the contactor, and selected the battery position on
the master switch. Everything seemed to be working correctly, except that
the contactor became quite hot to touch once it had been on for a while.
(There was no load on the main bus at this stage, the only current through
the contactor was the coil current.) I removed it and replaced it with a
second borrowed contactor, with the same result. I also took the
contactors out of the aircraft, and checked them on the bench, and again,
they became quite hot. Both contactors drew a coil current of about 750
mA.
Is it normal for battery contactors to run hot, or have I encountered two
faulty contactors?
Noel Karppinen
Message 4
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Subject: | Re: Battery Contactors |
At 16:59 12/17/2007, you wrote:
>Is it normal for battery contactors to run hot, or have I
>encountered two faulty contactors?
>
>Noel Karppinen
Do you perhaps have contactors rated for intermittent (starter)
service rather than continuous (battery) service?
Ron Q.
Message 5
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Subject: | Battery Contactors |
It's normal for them to be a little too warm to touch.
The current is about right.
Look at this at a 10W heater. It will get warm!
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Noel
Karppinen
Sent: Monday, December 17, 2007 6:59 PM
Subject: AeroElectric-List: Battery Contactors
I have just started wiring up a Jabiru 3300 installation, which includes a
battery contactor. I wanted to test that the basic power wiring was OK
before going too far with the wiring, so I connected a bench power supply to
the input side of the contactor, and selected the battery position on the
master switch. Everything seemed to be working correctly, except that the
contactor became quite hot to touch once it had been on for a while. (There
was no load on the main bus at this stage, the only current through the
contactor was the coil current.) I removed it and replaced it with a second
borrowed contactor, with the same result. I also took the contactors out of
the aircraft, and checked them on the bench, and again, they became quite
hot. Both contactors drew a coil current of about 750 mA.
Is it normal for battery contactors to run hot, or have I encountered two
faulty contactors?
Noel Karppinen
Message 6
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Subject: | Re: Battery Question? |
Good Evening Bob,
Wow!!
I had no idea it would take that much effort.
I do have a contactor that may work. It is a 6041H189 from a V35B.
I'll start gathering the rest of the needed materials. Thanks for all the
information.
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Air Park LL22
Downers Grove, IL 60516
630 985-8503
In a message dated 12/16/2007 11:57:29 P.M. Central Standard Time,
nuckolls.bob@cox.net writes:
Okay, you need to build up a "shop power
cart" consisting of two 12v batteries + the
HP power supply. I had just such a critter
for 1K1 while we owned it.
I got a metal "projector cart" on wheels at
Sam's Club. Office supply stores have them
too. Or you can built it out of wood. I'll
suggest that the 18 a.h. RG batteries that
you mentioned would be MINIMUM. These will have
tabs you can bolt up to. See:
**************************************See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)
Message 7
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|
Bob and others that responded.
Today I was able to get the ANL 60 replaced, and checked the B lead
wire.
It was indeed touching the firewall and appeared to be grounding out
there. Via the aluminum sheet on the FW back to engine ground. I did
not fire it up, as it was dark by then and only 20=B0F. If I have
further trouble I will post again.
Thanks for all the replies.
Kevin Boddicker
Tri Q 200 N7868B 79.6 hours
Luana, IA.
On Dec 5, 2007, at 11:54 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@cox.net>
>
> At 05:05 PM 12/5/2007 -0600, you wrote:
>
>> Bob,
>> I have burned two ANL 60 series limiters in six months. I have no
>> idea why.
>> The circumstances were the same both times though. I had just put
>> my engine back on the plane after some maintenance. After start up
>> I excite the field. This has been my method to check that the
>> alternator is working. Both times the LV light has remained on.
>> With no indication of charging. I thought my battery might have
>> been low, but putting on the charger this morning indicated not.
>> Not a huge deal, but at $20 a copy it is getting old.
>> Any suggestions?
>> Using a 55 amp DN IR alt. with crowbar OV.
>
>
> If you have 70+ hours on the airplane, do I presume
> correctly that the system HAS functioned most of
> the time without blowing the limiter?
>
> Normally, there's but two things that will open
> this limiter. (1) hard fault on the alternator
> side of the limiter. I.e. shorted diodes in
> alternator or shorted wiring between alternator
> and b-lead terminal or (2) battery in backwards.
> or external battery connected to system is
> jumper cabled in backwards.
>
> If you have an internally regulated alternator
> do I also presume correctly that you're using
> Z-24 with b-lead contactor as the ov disconnect
> scheme?
>
> Bob . . .
>
>
Message 8
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Subject: | Aspen Avionics panel: Too good to be true? |
> Speaking of economical...while looking at plasma TV's and HD video players the
> other day, I discovered that they want over a hundred bucks just for the cable
> that runs between the two units!!! Is that cable made of unobtainium or what?
> I sense a consumer rip-off, but the nice salesperson assure me of the fact
> that the quality of the picture is dependent on getting the ex$pensive cable!
> And I thought avionics stuff was cost intensive!
Yeah well, the salesperson was just repeating what she was told. Since hdmi is
digital
the picture either works or it doesn't. I buy the cheapest hdmi and dvi cables
I can
find.
Fyi, sometimes you can walk over to the computer section of the store and find
the
same cable marketed as a monitor cable for much less money.
c'ya,
Mike
-----
mjpnj@yahoo.com
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
Message 9
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Subject: | Re: Battery Question? |
Not to knock down Bob's suggestion, but I am not sure that you actually
need to go to quite that much trouble. It really depends on what you
want to do, how long you want your test batteries to last (both in the
sense of supplying power and in the sense of lifetime until they are
disposable). What Bob is suggesting would be great if you were to go
into the airplane avionics test and installation business.
You have to decide how sophisticated you want to get and how much
versatility and protection you need.
I suspect that what you need is a couple of batteries and a battery
charger. Use the batteries to do your testing and then connect them to
a charger overnight to be ready the next day. Alternately, just use
your 25A supply and forget the batteries. If you do need more than 25A
then you would need the batteries, but if not just keep it simple. The
HP supply is a good one and should do just fine up to it's maximum load.
My $0.02.
Do not archive.
Dick Tasker
BobsV35B@aol.com wrote:
> Good Evening Bob,
>
> Wow!!
>
> I had no idea it would take that much effort.
>
> I do have a contactor that may work. It is a 6041H189 from a V35B.
>
> I'll start gathering the rest of the needed materials. Thanks for all
> the information.
>
> Happy Skies,
>
> Old Bob
> AKA
> Bob Siegfried
> Ancient Aviator
> Stearman N3977A
> Brookeridge Air Park LL22
> Downers Grove, IL 60516
> 630 985-8503
>
> In a message dated 12/16/2007 11:57:29 P.M. Central Standard Time,
> nuckolls.bob@cox.net writes:
>
> Okay, you need to build up a "shop power
> cart" consisting of two 12v batteries + the
> HP power supply. I had just such a critter
> for 1K1 while we owned it.
>
> I got a metal "projector cart" on wheels at
> Sam's Club. Office supply stores have them
> too. Or you can built it out of wood. I'll
> suggest that the 18 a.h. RG batteries that
> you mentioned would be MINIMUM. These will have
> tabs you can bolt up to. See:
>
>
> ------------------------------------------------------------------------
> See AOL's top rated recipes
> <http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004> and
> easy ways to stay in shape
> <http://body.aol.com/fitness/winter-exercise?NCID=aoltop00030000000003>
> for winter.
> *
>
>
> *
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