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[Amps] High Input Swr SB-220

To: <amps@contesting.com>
Subject: [Amps] High Input Swr SB-220
From: n4zr at contesting.com (Pete Smith)
Date: Wed Mar 26 12:50:08 2003
At 08:22 AM 3/26/03 -0800, Rich wrote:
> > The fix is to up the design Q of the Pi tuned input to something that
> > solid-state radios will take.  This is covered in the Nov./Dec., 1990 QST
> > article. [orig manuscript on my Web site]

I don't doubt this is the optimum solution, but necessary?  My TS-930 is 
perfectly happy driving my unmodified SB-220 on all bands including 12 and 
17 meters.  My Mark 5 is happy with it on every band but 40m, where the 
power folds back a little because of the input SWR.  Again, it works fine 
on 12 and 17m even though the input circuits were never designed for these 
bands.


73, Pete N4ZR
The World HF Contest Station Database was updated 23 Feb 03.
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