I don't know the rules in Canada, but 30 meters is a shared allocation and
in the U.S. the power limit is 200 watts PEP. 300 watts on 30 meters is
illegal in the U.S. Check your local regulations.
Chris, AB6QK
Message: 2
Date: Thu, 5 Oct 2017 19:58:59 -0700
From: jerome schatten <romers@shaw.ca>
To: amps@contesting.com
Subject: [Amps] SB200 on 30m
Message-ID: <52EBEC9F-4193-4891-A923-8A0404A526C9@shaw.ca>
Content-Type: text/plain; charset=utf-8
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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