[Top] [All Lists]

Re: [Amps] suppressors

Subject: Re: [Amps] suppressors
From: Peter Chadwick <>
Date: Sat, 14 Jul 2007 11:00:29 +0200 (CEST)
List-post: <>
Carl said:
>However there are instances, for whatever reason, that a resistive material 
solves the problem.<

Very definitely. There's a book now out of print called 'Radio Transmitters' by 
Brown of Marconi. He has quite a lot on parasitic suppression in big 
transmitters - and points out that the box can be a VHF resonant cavity (we're 
talking 50 -100kW transmitters or more) and resistive loading by having such a 
thing as an 80 ohm carbon resistor - Globar type, 12 inches long, 1 inch 
diameter -  with one end connected to the anode and the otehr in free space can 
privide enough resistive loading to kill a VHF parasitic. Or even several of 
them at various angles.
Rather out of our legal power levels.......

Peter G3RZP
Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>