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[Amps] Drake L-7 amplifier power supply requirements

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Subject: [Amps] Drake L-7 amplifier power supply requirements
From: A Lawrence Fibich <>
Reply-to: A Lawrence Fibich <>
Date: Sat, 15 Jan 2022 18:24:27 +0000 (UTC)
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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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