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Re: [Amps] low pass filter fail

To: "Ian White" <gm3sek@ifwtech.co.uk>, <amps@contesting.com>, "'Benedikt Sveinsson'" <benedikt@ok.is>
Subject: Re: [Amps] low pass filter fail
From: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 29 Apr 2014 03:26:25 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>


-----Original Message----- From: Ian White
Sent: Tuesday, April 29, 2014 3:14 AM
To: 'Jim Thomson' ; amps@contesting.com ; 'Benedikt Sveinsson'
Subject: RE: [Amps] low pass filter fail


##  Do you really require a LP filter ?

Nope - you should only need to attenuate the harmonics of the driver
signal, so a harmonic notch filter should be fine. (Any non-harmonically
related spurious signals must be coming from the driver, and should be
removed before the reach the PA.)
73 from Ian GM3SEK


##  whoa.  The amp generates harmonics.... it doesn’t amplify harmonics from
the driver.

Jim VE7RF
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