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danny60
05-14-2010, 10:56 AM
I recently bought a amp and have no idea what it is. There is no schematic or tube chart.

Tubes installed are 5Y3,2x 6V6,3x 6SL7. I'm hoping to get a schematic as it has some mouse damage making one of the power caps unreadable (the can is a dual 20)

The corner protectors do not appear original as they are the wrong type.

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0774.jpg

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0775.jpg

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0776.jpg

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0777.jpg

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0780.jpg

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0782.jpg

Thanks so much for your time.

WaltC
05-14-2010, 11:07 AM
Looks like maybe an ampeg M- series (early model?) to me.

http://www.schematicheaven.com/ampeg.htm
http://www.schematicheaven.com/ampegamps/m12_6v6.pdf (???? looks like it)

mark norwine
05-14-2010, 11:45 AM
Indeed, there's a distinct Ampeg vibe to it...

danny60
05-14-2010, 12:00 PM
I've been told by a local guy Gison/Epiphone Zephyr. Can anyone verify this?

mr coffee
05-14-2010, 12:38 PM
neither ampeg or gibson ..

http://i348.photobucket.com/albums/q344/danengling/mystery%20amp/IMG_0780.jpg

not with the Japanese caps...

mark norwine
05-14-2010, 01:06 PM
Good catch, Tom!!!!!

teleman1
05-14-2010, 01:59 PM
It look Ampegish to me. With its age, whose to say the caps aren't a recap?

JerryP
05-14-2010, 02:12 PM
Those caps and resistors scream Japan. It's not an Ampeg or Gibson.
Jerry

teleharmonium
05-14-2010, 02:25 PM
I've got an amp with the same chassis and faceplate. That chassis was used in various amps sold in the late 60s/early 70s under the names Excelsior, Orpheum, and maybe others. Earlier amps under those names had been made in NJ hence the design influence; they started importing the chassis (which went into USA made cabinets with Jensen speakers) before going to entirely imported amps. I have heard Teisco made those chassis but I'm not sure how solid that info is.

Some of those amps use 6V6, others use 6AQ5. The transformers are not great, the designs are cool. The one I have (an Orpheum) has a beautiful cabinet with a pretty complicated design. It uses a couple of different coverings on different parts of the cabinet, but one of them is the same as the covering on the pictured amp. Unfortunately mine has a bad power tranny; it works for about 15 minutes and then it shorts out. I've been trying for years to find a replacement that won't require new holes in the chassis. I've kind of given up and now I think I'm going to try to have someone make an adapter plate instead.

phsyconoodler
05-14-2010, 06:24 PM
Looks like a tiesco to me as well.They made a few series of amps and that one looks like a Beltone.Nice amps by the way.
Same knobs that were on my Beltone but different configuration.I'd say late 50's because of the octal preamp tubes.You may find the Tiesco markings on the transformers.

SatelliteAmps
05-15-2010, 12:45 AM
I've got an amp with the same chassis and faceplate. That chassis was used in various amps sold in the late 60s/early 70s under the names Excelsior, Orpheum, and maybe others. Earlier amps under those names had been made in NJ hence the design influence; they started importing the chassis (which went into USA made cabinets with Jensen speakers) before going to entirely imported amps. I have heard Teisco made those chassis but I'm not sure how solid that info is.

Some of those amps use 6V6, others use 6AQ5. The transformers are not great, the designs are cool. The one I have (an Orpheum) has a beautiful cabinet with a pretty complicated design. It uses a couple of different coverings on different parts of the cabinet, but one of them is the same as the covering on the pictured amp. Unfortunately mine has a bad power tranny; it works for about 15 minutes and then it shorts out. I've been trying for years to find a replacement that won't require new holes in the chassis. I've kind of given up and now I think I'm going to try to have someone make an adapter plate instead.

Why not just have someone rewind the original transformer? It would then fit in exactly the same holes, with no drilling.

efnikbug
05-15-2010, 07:02 AM
It reminds me of my Guyatone.

nmiller
05-15-2010, 07:16 AM
It is an early '60s Univox amp. My best guess is a Guild 66-J, which was built by Unicord.

teleharmonium
05-15-2010, 01:45 PM
Why not just have someone rewind the original transformer? It would then fit in exactly the same holes, with no drilling.

The cost; I can get a top notch Fender type power tranny for $100-140, vs. about 300 for the rewind. I paid about 300 for the amp, and I don't think it will be worth any more than that once it's back to life with any form of non original or rewound transformer.

But if you know of anybody that will rewind a power tranny properly for cheap, I'd love to hear about it ! It's just a lil' thing.

BCJek
05-15-2010, 02:20 PM
I vote for Teisco out of Japan. I had one that was branded as Beltone for the Canadian market. Not the same model as yours, but the same brands of caps, reistors, etc.