[Amps] 572's

[Carl]

Ive converted several 2500's to 8121's when they were readily available from 
surplused TV translator service. Took the screen voltage off the HV and used 
a SS regulator with current and voltage limiting control. The horizontal 
cooling worked fine with a fiberglass shroud to direct the flow and ran cool 
at 1000-1200W out.

Carl
KM1H



----- Original Message ----- 
From: "Roger Parsons" <ve3zi at yahoo.com>
To: "Amps" <amps at contesting.com>
Sent: Friday, May 03, 2013 9:17 AM
Subject: Re: [Amps] 572's


> "I have been running a Dentron MLA 2500, modified this way, for about 
> three years (Not the
> QSK). with absolutely no problems.  My concern with this mod was mounting 
> the tube
> horizontally.  This has not been an issue, up to this point.  Comments?
>
> 73 de Lon, K5JV"
>
> I have also been using an MLA2500 modified with a horizontally mounted 
> 3CX800A7 for
> over 10 years. It works fine - and the tube cost me $100 as although it 
> was new it had
> been dropped and has a dented plate! Don't know about the other types of 
> amplifiers mentioned.
>
> 73 Roger
> VE3ZI
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