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Re: [Amps] SB-220 Plate Tuning Capacitor

Subject: Re: [Amps] SB-220 Plate Tuning Capacitor
From: Peter Chadwick <>
Date: Tue, 6 Jun 2006 18:03:56 +0200 (CEST)
List-post: <>
>From what Colin told me in a private email, it seems to me that the SB220 
>bandswitch is right on edge for the kW input power level, and too small at 
>1500 watts for safety. Really needs a bigger one, with a heavier indexing 
>mechanism. Now this isw ithout any parasitics, changing band instead of tuning 
>or anything else. Then there's a problem for people who get arthritis in their 
>hands, and that really needs a bar type knob or even a door handle type 
>arrangement. I can't say that as a general rule, I particularly like round 
>knobs on switches - I prefer the bar types such as on the old TU units for the 
>BC191. They also have the advantage that you know immediately if you grab the 
>bandswitch.  I believe that's called 'ergonomics'.

Peter G3RZP
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