eHam
eHam Forums => Repeaters => Topic started by: KE4AIF on May 22, 2022, 05:40:02 PM
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Tested today. Not used I a few years . Waco Cans.
Unit transmits fine very quiet until audio is applied. The audio is very garbled and not readable.
Looking for someone in west KY that could troubleshoot and repair.
Thanks for any help.
KE4AIF
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The audio is very garbled and not readable.
Sounds like your RX drifted off frequency.
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Other possibilities are:
1. One or more stages being overdriven. Normally that results in distortion affecting later stages in a manner which can be described as "garbling."
2. A power filtering problem injecting noise that interferes with the audio. The noise may not be audible.
3. Some component is about to completely fail between the receiver and transmitter.
You should be able to narrow it down by:
1. Listening to ONLY the audio output of the receiver receiving a known GOOD signal, without tone or digital squelch encoding problems.
2. If number 1. sounds good, the problem is with the interface/controller and/or the transmiiter.
3. If number 1. does not sound good, the receiver must be troubleshooted.
Possibly beyond your expertise: especially if the repeater has been unused for a long time, one or more capacitors have failed and/or one or more resistors have changed value too much for proper operation. Failed capacitors can, under some cases, "garble" audio.
Sorry, I'm quite distant from you. If you could supply an audio file of a repeated known good signal (on frequency, with no audio problems) I might be able to narrow down the problem area.
Mike WBØDZX