开云体育

Take a look at this post:? ?/g/BITX20/message/51448
where Allison suggests replacing all three of Q20,21,22 on the transmit side.?
A bit surprising, but then we need a fair bit of current gain at Q21,Q22
even though?there's no voltage gain.

Could be the loss in gain is not terribly significant on receive, and we're not so worried about spurs.
But my guess is it's worth swapping out Q10,11,12? too.?

Ideally, do tests before and after.

And if feeling squeamish about burning the board up with a heat gun for no good reason,
perhaps wait till Allison weights in.

Jerry