开云体育

With pot at mid range, a finger on the middle pot wire that feeds the TDA2822 should definitely make some noise.

Yes, the pot in the photograph in the wire-up instructions shows a pot without a power switch,
different than the one that comes with the kit.? The one in the kit is 10k, though that is not critical.

The pot ground lug is whatever lug gets the green wire, you could wire it to the lug on the opposite side
from what is shown in the picture but then fully clockwise would be minimum volume.

As stated before but worth repeating, the picture is correct with wires in green-orange-yellow order,
the diagram at the top of the page incorrectly shows orange and yellow swapped.

What TDA2822 do you have on the board?? Does it have a WX or FCI brand marking?
The WX parts have been rather unreliable, the FCI seems to work, I believe all boards
from hfsignals thus far have been using one or the other.
May be other clone manufacturers besides WX that give trouble, I wouldn't buy anything
for which you can't obtain a datasheet.??

If you happen to have an LM386 on hand, check this post and the thread around it:
? ??/g/BITX20/message/43156
You may want a 1uF cap between pins 1 and 8 of the LM386, this post incorrectly suggests 0.1uF:
? ??/g/BITX20/message/43189

Alternately, could take that wire from the center lug of the volume pot and run it
into a known good LM386 amp in some other gear instead of into the uBitx's TDA2822.
You will also need a ground wire over to that other gear.

Jerry, KE7ER