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Re: [Amps] Drake L-7 amplifier power supply requirements

To: A Lawrence Fibich <>
Subject: Re: [Amps] Drake L-7 amplifier power supply requirements
From: Mickey Baker <>
Date: Mon, 17 Jan 2022 23:30:44 -0500
List-post: <>

You’ll find a manual and a schematic here:

Hope that helps.


Mickey Baker N4MB
Palm Beach Gardens, FL

On Sat, Jan 15, 2022 at 1:24 PM A Lawrence Fibich <>

> I could use assistance from anyone who knows this Drake Amplifier and it's
> power supply. 1st I have advertized widely for an original one to buy -
> nothing.2ndly I did get a 'home built' power supply but at a road block as
> how to connect parts of it.  The HV section OK, and a secondary transformer
> provides a 120VAC to run through the on/off switch of the Amp to work the
> finals heaters circuit.  But I come to 'stop' in trying to know/figure out
> what more it needs into the circuits to the right of the finals on the
> schematic - like the interlock, ALC, meter, etc.  This homebuilt power
> supply does put out 5 VAC on the secondary but I don't know how to connect
> that to the Amp.Any assistance really appreciated.
> 73Larry FW6EFFair Oaks, CA (Sub of Sacramento, CA)
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