Farhan,
You didn't specify where or details.? This is the revised sBitx or some proto?
What the bias when cold and after immediately after a keydown session?
While my amps do not exhibit this, I've seen it in others especially when??
heating is an issue.? ?
Examples are the usual Ebay "70" watt amps?and similar copies.
--
Allison
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Please use the forum, offline and private will go to bit bucket.