Selmer Treble and bass Reverb Red and black period with 6BR8 tube

[blindboybenton]

Good afternoon

I have a Selmer Treble and bass Reverb Red and black period this one has been got at by a few people and i want to get it back to its former glory


I need the schematic for this model. Its not the usual schematic, this one has a 6BR8 running the reverb. I have all of the schematics that don't have this tube

Can anyone help

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[Enzo]

A place to start, do you have all of them from this site? Scroll down to Selmer:

Guitar Amplifier Schematics and more

[blindboybenton]

Thanks enzo. I aint seen this site before, But i have all of the ones listed

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[g1]

Probably no help, but Zenith 50 has 6BR8 reverb.
Selmer Zenith 50 Schematic

[blindboybenton]

Thanks g1 its a help. Ive heard from someone that there isn’t a map for this model and the nearest is the 50watt sv with reverb using a ecc83 and work the rest out

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[Enzo]

So often amp makers reuse circuits, so if your problem is with the reverb function, the power amp stage probably doesn't matter, and like that.

[vintagekiki]

little help until you find the T & B schematics

http://web.archive.org/web/20030211015320/http://www.obsoleteelectronics.com/The_Archives/the_archives.htm#Schematics


http://www.vintagehofner.co.uk/selmer/schematic/wire.html

http://www.vintagehofner.co.uk/selmer/schematic/pa100rev.html
PA 100w Reverb

http://www.vintagehofner.co.uk/gallery/gallery3/selm.html

[blindboybenton]

The reverb is working but not too well noisy and hummy.customer looks like he is scared to open his wallet and let the purple ones ( Green in your case ) flow out
it needs a lot of work and parts getting it back to its former glory. even offered the guy a cheap repair and allowed him to pay half up when amp ready and pay the rest later next month
as i know him.
so all this work hunting the map down looks like too be in vain


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[blindboybenton]

thanks , i will check them

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[Alex R]

Some old reverbs just are noisy. A lot of 60s amps had reverb and trem circuits that didn't work as well as the amp designs that survived. I'm thinking of the incurably noisy reverb on some 70s AC30s, or the cap-coupled trem I've been wrestling with on an old Bird.

eta that's an old Bird AMP ok?

eta2: the 70s T&B selmers usually had outboard reverb jacks, I wonder whether that was their solution to the noise? Another thing to check is that this is a modern-style coil-driven reverb; in the 60s some brit amps used two crystal record player cartridges...

[blindboybenton]

this one has hard wired cables. Im suspect on the tube, I brought another one from hotroxs its a RCA 6BR8 NOS but its worse in the amp, increases the hum by another 60% and made the reverb stop working .. I think its bad, but i will have to send it back for them too test.

Looks like the amp aint being done after all. which is a shame as i love doing a complete overall
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