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Hoffman Amps Forum image Author Topic: Marshall 3315 power transformer?  (Read 1783 times)

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Offline Searing

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Marshall 3315 power transformer?
« on: September 04, 2020, 12:31:27 pm »
I cannot find a replacement for this amp.  The Marshall 3315.  Its 100w and needs a new power transformer.  Any suggestions please?  Thanks.
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Offline sluckey

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Re: Marshall 3315 power transformer?
« Reply #1 on: September 04, 2020, 12:38:50 pm »
Probably not much help but here's the schematic...

     https://el34world.com/charts/Schematics/files/Marshall/Marshall_150w_3315_5150.pdf
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A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pdf64

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Re: Marshall 3315 power transformer?
« Reply #2 on: September 04, 2020, 03:14:00 pm »
If you don’t know a friendly, Marshall approved tech to order an OEM replacement, looks like like you’ll be needing something with two secondary windings, each of 30-32Vac at around 2.5Aac.
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Offline shooter

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Re: Marshall 3315 power transformer?
« Reply #3 on: September 04, 2020, 03:44:52 pm »
fwiw;
used this in a SS audio PS


DC on my rail is ~ 45-48vdc each rail, rated at 10A



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Offline DummyLoad

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Re: Marshall 3315 power transformer?
« Reply #4 on: September 04, 2020, 04:19:54 pm »
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