jpx(at)Qenesis.com
Guest
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 Posted: Thu Aug 13, 2009 5:24 am Post subject: AeroElectric-List Digest: Re: Radio Noise |
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| Quote: | Is the radio's rf connector making contact with the jack in the rack?
Hard to check, but rather important.
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This is definitely a point we are suspicious of. Unfortunately, the
connector is rivetted to the frame, so we can't easily take it out to
either test it or replace it. We might have to though.
Yesterday we patched the handheld to the antenna connector in the rack
and it worked perfectly, so the antenna and all cabling is good.
We looked at the wiring to the connector at the back of the radio. Without
tracing every wire, things looked reasonable.
Curiously, there is a 10watt 4 ohm wirewound resistor connected from the
speaker output to ground. There is no speaker in the aircraft, only
headsets. It appeared like the connection to the radio was intermittent.
Does this radio really need a speaker load if no speaker is installed ?
Without it, could the amplifier section add a lot of noise ?
Yesterday we were distracted with a stuck mic problem. It turned out to
be a sticky switch. I was truly amazed at how patient the controller was
considering he was unable to talk to aircraft in the circuit for up to
30 seconds at a time. After it happened the third time, he politely
requested the aircraft head back to the hangar.
Jeff Page
Dream Aircraft Tundra #10
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