Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Searing on September 04, 2020, 12:31:27 pm

Title: Marshall 3315 power transformer?
Post by: Searing 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.

Title: Re: Marshall 3315 power transformer?
Post by: sluckey 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

Title: Re: Marshall 3315 power transformer?
Post by: pdf64 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.

Title: Re: Marshall 3315 power transformer?
Post by: shooter 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

Title: Re: Marshall 3315 power transformer?
Post by: DummyLoad on September 04, 2020, 04:19:54 pm

https://www.antekinc.com/as-3432-300va-32v-transformer/

https://www.mouser.com/ProductDetail/Bel-Signal-Transformer/68-6?qs=0%2F2GmT7MRM8SMFNA2hL2%252Bg%3D%3D



--pete