Re: Troubleshooting audio and mic issues
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This may or may not be part of your problem, but I remember hearing that both of the leads going to the speaker/headphones MUST be insulated from ground or the output chip can be fried. Most adapters assume that grounding one side of the speaker is OK, so be sure that the both speaker leads are floating from ground. Frying the output chip is no good!
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73, Kevin K3OX
From: Szymon <szymon@...>
To: Lab599 <[email protected]>
Date: Thursday, 3 October 2024 5:27 PM EDT
Subject: [Lab599] Troubleshooting audio and mic issues
Hello,
I have a couple of issues that I noticed on on my recent SOTA outing, and I am hoping to get some help with.
>>Issue 1<<
I am trying to replace the stock speaker-mic with something lighter. Should I expect the 6-pin adapter to work with regular earphones? Based on a short glipse from the following video it seems like it should work:
https://youtu.be/LitUhrdochQ?si=Osdk7iLesIIQ5Pyy&t=116
Unfortunately, when I try it with my earphones I hear a loud noise:
https://youtu.be/JFLTgs26gdw
My setup in that video is:
- Pretty standard earphones with an inline mic, their connector is TRRS
- Pretty standard headphone/mic splitter: TRRS to 2xTRS
- GX12 6-pin adapter that came with the radio
Same results with another headset I tried.
>>Issue 2<<
Last week I was activating a SOTA summit. I was using the speaker-mic that comes with the radio. I also had headphones plugged in. I was using the MON function as well as the VOM1 to compare recorded audio. This was with the gain and compresion settings that have been verified at home.
- On 10m my recorded voice was a bit scratchy, but readable.
- On 15m my monitored voice was just garbled noise.
I unplugged the headphones, tried again.
- On 15m my voice was quite distorted, but not as bad as with the headphones plugged in.
I was using an EFHW cut for 40m - a proven, trouble-free performer with IC-705 and KX2. Had a 3m feedline to the radio. Attaching picture of how I was setup on the summit.
Thanks for any insights!
Szymon WV0X
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