Re: Micro BitX No Audio TDA2822?
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Ron N4RT
Scroll to the bottom for the full schematic.
Arv? K7HKL
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On Wed, Mar 7, 2018 at 8:32 AM, Ron Thomas <n4rt@...> wrote: Ok, I am new to this group and have just assembled my micro bitx.? I sent an earlier message to the group explaining that I have no audio.?
After reading some of the posts regarding the TDA2822 chip, is it possible that I have somehow blown the audio amp while plugging in headphones or external speaker using the supplied audio jack?
I've not heard any noise from the speaker or headphones at any time... no pops or other noises at all.
The rig powers up and appears to tune just fine (I haven't tried to transmit yet) but after not getting any audio, I stopped at that point.
Where should I probe with voltmeter or oscope to see where I'm losing audio?? Any troubleshooting tips anyone could share would be most appreciated.
Is there a schematic of the board somewhere that I can download?
Sorry for all the questions but I don't know much about this rig.
73,
Ron N4RT
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