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Re: [Amps] Pi vs Pi-L

To: Theo Bellamy <theo.bellamy@spirittelecom.com>,Amps <amps@contesting.com>
Subject: Re: [Amps] Pi vs Pi-L
From: jkearman@att.net (Jim Kearman)
Date: Wed, 01 Feb 2006 19:05:36 +0000
List-post: <mailto:amps@contesting.com>
From: Theo Bellamy <theo.bellamy@spirittelecom.com>

> So, if Mr. Averageham wants to build an amp with a Pi network tank, and he
> uses a multi-band antenna, will using an antenna tuner between the amp and
> the antenna insure that his harmonics are sufficiently suppressed?

The ubiquitous t-network tuner with series capacitors and a shunt inductor 
(like the MFJs) is a high-pass filter, so it won't help a bit. The old Johnson 
Matchboxes with parallel-tuned inputs would probably do some good. The pi-L is 
the way of the future, and multi-section bandswitches will be a hot item.

73,

Jim, KR1S
http://kr1s.kearman.com/
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