[Amps] SB-220 parasitic suppressors

[Vic Rosenthal]

One reason that an SB-220 can develop VHF parasitics is the following:  the 
original suppressors use 2-watt carbon composition resistors.  These resistors 
tend to increase in value when they age, and especially when they are heated. 
If an SB-220 has been used heavily, especially on 10 meters or -- worst case -- 
on 10 (or 11!) meter AM, the resistors will have gotten quite hot and may have 
changed significantly in value, or even opened up.

If the resistors are discolored, they should definitely be replaced.

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