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Re: [Amps] SB200 on 30m

To: jerome schatten <>
Subject: Re: [Amps] SB200 on 30m
From: Vic Rosenthal <>
Date: Fri, 6 Oct 2017 08:47:24 +0300
List-post: <>
Just move the 20m tap to about halfway between its original location and the 
40m tap. This should have no effect on 80/40 at all.

Vic 4X6GP 

> On 6 Oct 2017, at 5:58, jerome schatten <> wrote:
> Hi…
> On 30m using the 20m band-switch position, I’m able to get about 200w out 
> into a dummy load/wattmeter before the grid current rises faster than the 
> plate current. On 80/40 I can get over 400w out.  Since I’m only interested 
> in using the amp on 80/40/30, I thought to improve the 30m situation a bit by 
> adding a few turns to the total pi-network inductance in the 20m position.
> I’m willing to sacrifice a bit of efficiency on 80/40 to bring up 30 and 
> sacrifice 20/15/10 entirely. The goal here would be 300+ watts on 80/40/30 
> with ease. I have already taken care of the input matching for 30 in the 20m 
> position.
> I would appreciate any suggestions.
> Jerome - va7vv/ve7ass
> Vancouver
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