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skuep / AIOC

Ham Radio All-in-one-Cable
MIT License
711 stars 56 forks source link

"Pop" sound on RX start and end #79

Closed W1BTR closed 1 week ago

W1BTR commented 2 months ago

When the squelch opens for RX, there is a loud "pop" sound that is a good 6db louder than any signal. This "pop" sound also occurs at the end when the squelch closes.

Anyone know of any good ways to isolate the audio circuit to reduce this noise? One possible use for the AIOC is to make a repeater, but this pop sound makes it difficult.

skuep commented 2 months ago

You have to give me some clues about your setup... It might be that the radio switches off the DC level on the speaker output during idle if I understand you correctly. Then each time it switches the amplifier on it off, the AC decoupling cap needs to be charged again.

I am not sure if there is anything I can do there. 🤔

W1BTR commented 2 months ago

Hm not sure what's causing it exactly. On all radios Ive tried (UV-5R, UV-K5, GA-510, and some custom connected radios like the ic-2820h) this happens with the AIOC going into voicemeeter or a recording software, but not when the radio is connected to a speaker or speaker mic. Ill have to record a vid at some point

skuep commented 1 week ago

If you can, it would be best to post a picture or video of your setup and the problem. In the meantime I am closing this issue due to inactivity, but you can reopen it anytime in the future.