[Amps] SB200 on 30m

[Vic Rosenthal]

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 <romers at shaw.ca> 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