[Amps] SB221 (220) Input SWR

[William Spickler]

I have an SB221 with the SB220 mods for 10 mtrs that recently developed a high SWR on 15 mtrs only.  I can tune it down with a tuner between the driver and the Amp although I'm not sure that's good for the grids.  I have replaced the 115 pf and 150 pf caps in the input circuit on 15 mtrs and I have cleaned the contacts on the bandswitch with no improvement.  Mechanically everything looks okay.

I suppose my next step will be to pull the coil out and see if it is okay, but I'm hesitant to do that because I don't know where I would find a replacement.  Does anyone have any other suggestions or does anyone know where I can find these coils.  

Please reply directly to bill at spickler.net

Tnx es 73s

Bill