[Amps] SB221 (220) Input SWR

[Vic Rosenthal]

Gudguyham at aol.com wrote:

> It is pretty difficult to adjust a coil while the amp is on, some
> fancy ingenuity is in order, but it should be adjusted.  Contact me if you 
> decide you want a coil.  73 Louie W1QJ

Difficult and dangerous.  However, one can temporarily put a carbon 
resistor whose value is the same as the input impedance under operating 
conditions of a pair of 3-500z's (I don't recall but someone will know) 
from cathode to ground, and use an antenna analyzer to adjust the coil 
for minimum SWR with the amp off.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco