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Re: [Amps] New SB-200 owner

To: amps@contesting.com
Subject: Re: [Amps] New SB-200 owner
From: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Reply-to: g3rzp@g3rzp.wanadoo.co.uk
Date: Thu, 27 Sep 2007 06:16:03 +0200 (CEST)
List-post: <mailto:amps@contesting.com>
Roger said:
>More than likely I'd move on to the ARRL Handbook and build a PI-L network 
for the desired Q at the operating frequency which in this case is 50 to 54 
MHz.<

Is there any advantage in using a pi-L, rather than a straight pi and suitable 
low pass or bandpass filtering to get the harmonics down? Especially since 
we're talking of a single band amplifier that needs to have the second harmonic 
at least 70dB down, and I doubt a pi-L will do that on its own
Does the pi-L give a greater impedance matching range for any given Q variation 
or something? Although I'd have thought that on 6, you'd be looking at pretty 
low SWR anyway.

73
Peter G3RZP
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