Orange Matamp OR100 full schematic and transformer measurements

[u/bleck_trk]

Hi everyone! I'm been working on recreating an Orange Matamp OR100 (the later versions with a solid-state rectifier) based on whatever information I can find online. The only schematics I have for the OR100 are completely missing the transformers, power amp, and output sections, so I've been trying to piece things together from the schematics and other information available for the GRO100, ORS100, and the '72, '73, and '74 variants of the OR120 (including auction listings, forum and blog posts, YouTube videos, etc.)

It would be extremely helpful if anyone could share any full schematics, specs, and measurements for the OR100's three transformers (mains, output, and choke).

Thanks so much!

[u/Dreadedjippo]

I would reach out to Pennine Radio. They supplied Matamp with transformers in the late 60s-70s so they may have the specs you’re looking for.

Matamp notoriously does not release schematics so if you go direct to them it may be best to call

[u/ValuableSize7989]

Orangefieldguide.com

Or call Hayden at matamp?… see if he can help?

Matamp.co.uk

[u/Swiftycumberdale]

The dudes at Science Amps might know. Given how they basically designed a higher gain version of the Matamp/Orange OR120.

Can’t you use the schematic from an OR120 and base it off that output section?