What was the logo on the fried U1?
Does it? say "WX TDA2822"?
Does it say "FCI TDA2822"?
This is important.
I suspect that a good TDA2822 will not fry with a short unless you have the volume turned way way up.
And that you have the WX clone.
But I could be wrong.
Here's the latest news regarding the bad chips:
? ??
/g/BITX20/message/44394? ??
You can probably find an LM386 locally or in some older project that can be hacked in there temporarily
till you get a new TDA2822 in from Mouser or Tayda or similar.
Choosing a $109 all HF band SSB transceiver means you get to deal with this sort of thing.
Jerry
On Wed, Mar 14, 2018 at 10:31 am, <WA9GQT@...> wrote:
I was very cautious and finally got the uBITX?wiring correct after looking at all the posts.? It was receiving great until I unplugged my headphones and
plugged in a speaker.? I fried U1!? My speaker plug was not stereo it was mono plug!? So that's why U1 audio amp fried.? So I just ordered 2 TDA2822M's
from Amazon.com.? I am unable to use the uBITX until I replace U1.
I am very upset about this audio circuit design!? This circuit seems to be the Achilles heal of this radio, including a?very loud popping between?receive/
transmit.? I would?like to use a speaker in the future.? I will?be sure to be very careful of the wiring of any?speaker.? I hope to have my first contact soon!
A very unhappy
Rod, WA9GQT
