jgamtmann2(at)gmail.com
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 Posted: Thu Sep 16, 2021 5:21 am Post subject: AeroElectric-List Digest: 1 Msgs - 09/15/21 |
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Thanks Bob, for your analysis. Makes me much more confident about plugging the radio back into the panel and having communication while flying off my hours. Jürgen Amtmann
On Thu, Sep 16, 2021 at 12:46 AM AeroElectric-List Digest Server <aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)> wrote:
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Total Messages Posted Wed 09/15/21: 1
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Today's Message Index:
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1. 01:00 PM - Re: COM radio failure (Robert L. Nuckolls, III)
________________________________ Message 1 _____________________________________
Time: 01:00:38 PM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>
Subject: Re: COM radio failure
At 04:50 PM 9/1/2021, you wrote:
>>Bob,
>>
>>You answered my question about my inoperative GX65 a couple
>>of weeks ago. It came back from repair with the failed
>>component (taped to the chassis) that looks like a small
>>capacitor, not surface mount. It has burn marks on the side,
>>I can't imagine how I missed it when I looked over the boards
>>with a 3X loupe. If I sent it to you, (and where would I
>>send it?) could you possibly identify how this could have
>>failed? I'm assuming that the radio now works, I have
>>not installed it yet.
Got a chance to look over the fried capacitor you
sent. Yes, the darkened condition is strong evidence
of failure (shorted leading to overheating).
This style of tantalum chip capacitor is almost
vintage . . . very early package style that was
replaced with a more robust configuration. Yes,
it's a surface mounted part. That little pigtail
is not the remnant of a lead-wire.
I suspect that the replacement part was a
more modern design but yeah, this was quite
probably root cause of the radio failure.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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