Date: Thu, 19 May 2011 12:35:34 +0200
From: "DF3KV" <df3kv@t-online.de>
Subject: Re: [Amps] PA efficiency
To: <amps@contesting.com>
Message-ID: <FEA683BECF23454DAAA59CE16E1C6ABB@shack>
Content-Type: text/plain; charset="us-ascii"
You might have a hard time to reach even 60% efficiency from a VHF/UHF amp
73
Peter
## point well taken. I was ref to a hf amp, low bands. You get the point
though.
One should be able to by careful measurement, be able to calculate eff within
a few percent.... not within 20%.
## I have a friend in W7 land who built a hb 6m 8877 amp... and eff
was lousy. He rebuilt that tank circuit twice again...and a buch of other
mods...
and managed to get it up by a few percent....but it was still lousy. Turns out
his bird slug was out to lunch, not even close. With a known, accurate
slug... indicated po went from 1500w up to 2200 w.
Jim
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Jim Thomson
If I built an amp that I thought had 68% eff.... then found out it was
really only 48%... I'd go nuts. Not good enough.
later.. Jim VE7RF
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|