Marstran RS Output Transformor Wiring Help

Get support and show off your MetroAmp JTM 45 kit builds.

Moderator: VelvetGeorge

Post Reply
RockinRocket
Senior Member
Posts: 235
Joined: Thu Aug 07, 2014 10:44 pm
Just the numbers in order: 13492

Marstran RS Output Transformor Wiring Help

Post by RockinRocket » Wed Jan 09, 2019 9:40 pm

I'm confused about how to wire this sucker up.
Here is the link to the schematic. I'm interested in 8 ohm.

http://marstran.com/Wiring%20Diagrams.html

'Im extremely confused why the Black wire and Yellow are linked? Blue and brown linked too?
What reason are these connected if so?

But Id like to know how every wire up.
Thanks guys :)

danman
Senior Member
Posts: 803
Joined: Tue Sep 10, 2013 9:09 pm
Just the numbers in order: 13492

Re: Marstran RS Output Transformor Wiring Help

Post by danman » Thu Jan 10, 2019 6:35 pm

The RS OT is a hifi OT with interleaved windings and multiple plate load options. Your assumptions on the secondary wiring are correct. To wire the primary you must decide which plate load you want to run. Many folks like the 6.6k sound while others go for the 8k load. You could try them both and see which you prefer.

RockinRocket
Senior Member
Posts: 235
Joined: Thu Aug 07, 2014 10:44 pm
Just the numbers in order: 13492

Re: Marstran RS Output Transformor Wiring Help

Post by RockinRocket » Thu Jan 10, 2019 9:10 pm

Thanks Danman,
so for a 8ohm load I take the Blue and Brown wire and solder the leads together?
Wire the Black and Yellow together to the ground lug/speaker ground??
Thanks!

danman
Senior Member
Posts: 803
Joined: Tue Sep 10, 2013 9:09 pm
Just the numbers in order: 13492

Re: Marstran RS Output Transformor Wiring Help

Post by danman » Fri Jan 11, 2019 7:59 pm

From looking at the schematic, I would agree with you. The green lead would be the positive lead to the speaker, brown and blue tied together and heatshrinked, and black and yellow to the speaker's negative terminal.. Here is a thread from the Marstran forum where they give a little bit more info on the original...http://forum.marstran.com/viewtopic.php?f=2&t=128

RockinRocket
Senior Member
Posts: 235
Joined: Thu Aug 07, 2014 10:44 pm
Just the numbers in order: 13492

Re: Marstran RS Output Transformor Wiring Help

Post by RockinRocket » Fri Jan 11, 2019 8:32 pm

Thanks my friend :toast:

Post Reply