[Amps] sb-220 tuning question - closing in

Pete Smith n4zr at contesting.com
Thu Mar 4 08:19:00 EST 2004


Isn't this all getting a little over-complicated?  If both tune and load 
controls are adjusted for maximum output at rated drive (~100 watts), there 
should be no arcing and performance should be nominal.  If you want, add a 
little loading (clockwise) past peak output for better IMD 
performance.  Once you're peaked, tape an index card behind the knobs and 
mark the settings for each band.  You'll discover that on 80-20 meters, 
setting to the marks will be close enough, while on 20-10 a 2-second 
touch-up on the tune cap is all that's really needed.

73, Pete N4ZR



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