Hi Mike!
Yes - in my experience that is about what you can expect from a used SB220/221.
New tubes might help a bit on 10M. The power supply is pretty marginal. There
are things you can do to help it (Harbach) and many articles about it - a
better transformer would help - but most likely won't fit in the case. I have
a power supply you can have if you pick it up (😊) Its about the size of R2D2.
Better off with a better amp.
David B. Ritchie, W6DR
dbritchie@gmail.com
+1-650-862-6400
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