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@yahoo.com>
To: "Amps" <amps@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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