[Amps] MLA-2500 Tube Conversion

[Carl]

The GI-7B is fine if all you care about is CHEEEEEP.

It also is a horrible tube for a linear and would sound great on 11M


----- Original Message ----- 
From: "Roger Parsons via Amps" <amps at contesting.com>
To: "Amps" <amps at contesting.com>
Sent: Sunday, October 10, 2021 5:41 PM
Subject: [Amps] MLA-2500 Tube Conversion


>I converted an MLA2500 to a single 3CX800A7 some years ago, and it works 
>fine. If I was doing it again I think I would probably use a pair of GI7Bs 
>which are much cheaper.
>
> I don't think you need an extra filament transformer - the existing 
> transformer has a 12V 4A winding which is plenty. (As others have 
> mentioned, the voltage will probably be too high and a series resistor is 
> called for.) The 6V winding can then have a voltage doubler on it to 
> supply relays and and LEDs.
>
> 73 Roger
> VE3ZI
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> Amps at contesting.com
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