Author Topic: Looking for Power Transformer  (Read 304 times)

0 Members and 1 Guest are viewing this topic.

Offline Kossandr

  • Jr. Member
  • **
  • Posts: 7
Looking for Power Transformer
« on: December 29, 2016, 08:17:58 pm »
Anyone by chance have an old 28-2350, or 28-2351 power transformer they'd be willing to part ways with? I need to replace a fried one in one of my Sun Solos.

Offline _peter

  • Jr. Member
  • **
  • Posts: 18
Re: Looking for Power Transformer
« Reply #1 on: December 30, 2016, 04:50:07 pm »
Hi,

how about a 28-2360?

Best,
Peter

Offline Kossandr

  • Jr. Member
  • **
  • Posts: 7
Re: Looking for Power Transformer
« Reply #2 on: December 30, 2016, 05:44:48 pm »
I sure wish I could find some good documentation in these old parts :-)

The best I can tell from what I can find on the internet, the 28-2360 is a 60 watt power transformer. I can't find a good schematic the lists all the voltage outputs of it either. I know from testing a functional 28-2351 that it runs:


Blue: 260 vac
Red: 68 vac
Green: 6 vac (tube heaters)
Black: 120vac (input)

And from what I can tell the amp I'm trying to replace the PT in (a Sunn Solos) is an 80 watt amp. So I'm thinking the 28-2360 might not work.

Offline _peter

  • Jr. Member
  • **
  • Posts: 18
Re: Looking for Power Transformer
« Reply #3 on: December 30, 2016, 09:19:34 pm »
Oh, my bad, I thought you are looking for a tube amp transformer while the Solos is a transistor amp.

Then I can't help you, sorry.

Offline Kossandr

  • Jr. Member
  • **
  • Posts: 7
Re: Looking for Power Transformer
« Reply #4 on: December 30, 2016, 10:29:24 pm »
It's a Solos, which is actually a hybrid tube preamp, solid state power. The later Solos II's were all solid state. But yeah, I think (from what I can gather from reading online) the power transformers Sunn used in their all tube amps were different.

Unless someone on here knows something different than what I've managed to uncover...

Offline Lefty Bass Player

  • Jr. Member
  • **
  • Posts: 1
Re: Looking for Power Transformer
« Reply #5 on: January 18, 2017, 11:29:18 pm »
I have some NOS Sunn hybrid PT, these are from the 70s and the manufactures part #394-P6
...8318203 here are the secondary voltages, these are large transformers

2xblue=114vrms.....for the tube preamp
3 wire=red-red/yel-red=42.8vrmsx2....for the solid state power amp
2xyellow=28.5vrms....for?
2xgreen=8.57vrms....tube filament

Hope this helps: Martin