[Amps] sb-220 on 17 meters

[peter <lecutis2@netscape.net>]

I recently aquired a sb-220.  When I try to tune up the amp on 17 meters
using the 15 meter band switch I get only 300 watts out and both tubes
really are working hard.  I get 1kw out on 15 meters and 20 meters.  Is
my plate choke resonating about 18 mhz ?  Any help would be appreciated.
Peter
KC0NYG



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