Today's Message Index:
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0. 10:15 AM - Just 3 Days Left - Please Make Your List Contribution Today! (Matt Dralle)
1. 06:46 AM - Re: Wiring handheld scanner into intercom ()
2. 06:58 AM - VDO Fuel gauge wild reading... (SIDESLIP)
3. 02:20 PM - Re: VDO Fuel gauge wild reading... (Robert L. Nuckolls, III)
4. 03:29 PM - Re: VDO Fuel gauge wild reading... (SIDESLIP)
5. 06:21 PM - Re: Re: VDO Fuel gauge wild reading... (Robert L. Nuckolls, III)
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Subject: | Just 3 Days Left - Please Make Your List Contribution |
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Subject: | Wiring handheld scanner into intercom |
Geoff,
I claim no knowledge of audio connections but I would like to add to that a related
issue with my Icom. I have a transceiver model (forgot which 1), which accepts
and adapter plug for my headphones. If needed I can plug into the adapter
and listen to whatever. The problem I have is that whenever I have the Icom
on and engine is running, the noise level sets off the auto-mic and places into
transceiver mode. Regardless of how I set the sensitivity, it just doesn't cooperate.
In manual mode the mic picks up lots of background and makes my transmission
unrecognizable (when flying). I think the designers build these things
primarily with ground crew in mind.
I too would like to add some sort of adapter to my AUX option on the panel such that I could plug directly in and bypass the handheld mic. I've not asked my cable guys (http://www.approachfaststack.com/), but I'm sure they have a solution (or will make 1). You'll need to give up a $100 bucks or so for a result, but it will work.
Glenn
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of geoffwinter
Sent: Wednesday, November 28, 2012 12:05 AM
Subject: AeroElectric-List: Wiring handheld scanner into intercom
Hi, the airfield I fly out of has a UHF-only ATIS which I currently monitor via
a handheld scanner with a 3-conductor 1/8" 8 output (Icom IC-R5). I use bud-style
earphones and simply put one of the ear pieces into my ear underneath my
headset when I need to hear the scanner. Not exactly the most convenient solution,
so what I'd like to do is wire in the output from the scanner directly
into the output from my KY97A comm radio so that both are permanently going into
my headset. That way, all I need to do is turn on the scanner to hear it,
then turn it off when finished. I'm guessing I need to match the impedances
to make this work - I understand the standard David Clarke headset is usually
100 ohm? Could anyone please advise what (electrically) I need to do to make
this work? Apologies for being a complete avionics/electrical numpty!
Regards
Geoff, NSW AUS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=389239#389239
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Subject: | VDO Fuel gauge wild reading... |
Hello all...
Got another little "issue". I've got the 912 gauges in my 601XL-B. I've got a single
fuel gauge with a left/right tank switch. When flipped to the right tank,
the needle slowly winds its way past 1/1. Bad ground? Bad sender? It's a top
mounted sending unit, but that is the extent of my knowledge on this subject.
If it was a bad ground, would the needle not slam itself to its full swing past
full? The fact it takes a bit has me wondering.
Thanks in advance!
Chad
--------
C-GYXQ. 912ULS. 601XL-B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=389255#389255
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Subject: | Re: VDO Fuel gauge wild reading... |
At 08:56 AM 11/28/2012, you wrote:
>
>Hello all...
>
>Got another little "issue". I've got the 912 gauges in my 601XL-B.
>I've got a single fuel gauge with a left/right tank switch. When
>flipped to the right tank, the needle slowly winds its way past 1/1.
>Bad ground? Bad sender? It's a top mounted sending unit, but that is
>the extent of my knowledge on this subject. If it was a bad ground,
>would the needle not slam itself to its full swing past full? The
>fact it takes a bit has me wondering.
Get out your ohmmeter and find the DIFFERENCE
between the two senders. The slow motion of the
gauge is not uncommon. At Cessna back in the 60's
we 'dopped' the pivots on Stewart Warner gauge
clusters with a drop of high viscosity silicon
oil. This didn't affect accuracy but it stopped
needle jitter due to mechanical and/or electrical
stimulus.
Bob . . .
---------------------------------------
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
---------------------------------------
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Subject: | Re: VDO Fuel gauge wild reading... |
Difference? Well, the tanks are full, so the only thing I could establish MAYBE,
is the current resistance at the gauge for each of the senders.
Is that what you mean?
Thanks Bob!
Chad
--------
C-GYXQ. 912ULS. 601XL-B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=389373#389373
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Subject: | Re: VDO Fuel gauge wild reading... |
At 05:28 PM 11/28/2012, you wrote:
>
>Difference? Well, the tanks are full, so the only thing I could
>establish MAYBE, is the current resistance at the gauge for each of
>the senders.
>
>Is that what you mean?
Sure. You have one side that reads
right, the other one wrong. The only
difference is their position on the
selector switch. So in comparing the two
sides with each other, one of them has
a loose connection, bad sender resistance,
or perhaps the switch itself is bad.
Having one side that works and one that
doesn't really narrows down the possibilities
and offers the opportunity for comparative
analysis.
Bob . . .
---------------------------------------
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
---------------------------------------
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