In a message dated 6/1/2006 9:04:13 P.M. Eastern Standard Time, r@somis.org
writes:
I'd even go a step farther - I took the nichrome out of my SB-220,
> substituted traditional suppressors, and picked up about 50 watts
> output on 10 meters. Not a significant amount, but indicative of
> the amount of additional heat and potential reliability problems.
> The amp remains very stable.
>
> 73, Pete N4ZR
I have had dozens of Sb-220 amps in my almost 40 years as a ham. Most of
the parasitic suppressors I have changed had their carbon resistors change
value enough to make them not as effective as suppressors should be. Most of
the
time a change of resistors will tame a quirky Sb-220. Anyone who has used
an Sb-220 a lot on 10 meters would eventually see little bubbles on the carbon
suppressor resistors, figure they need replacing and use Rick's suppressors
as replacements. Of the dozens I have had, at least 50% of them had his
supressors. No doubt they work.
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