Can anything be done

[sweet]

I'm looking to possibly work with this amp hopefully turn it into a nice Stereo. Can anything be done with this or is it impossible to do anything with this

 

[Yvesm]

Hi !

Among any other difficulties, it appears, at first, that the two Output Transfos are really differents.
You should plan to obtain two similar units.

Yves.

 

[sweet]

Are you saying that this whould not make a good amp? What would I have to do or what modificationss should be done to make it worth while
Thanks Steve

 

[Sch3mat1c]

Yeah, buy new OPTs. I'd rework the circuit to remove the reverb and extra amplification that goes with it. Otherwise, if it's got all the tubes and power supply there...

Tim

 

[sweet]

I guess this is nothing special to work with so I'll keep looking till I find something. I am just a beginner and was looking to learn as I go. I was hoping this was a good one to work with.

BTW can anybody guess where this amp came from?

 

[planet10]

BTW can anybody guess where this amp came from?

I's guess that it came out of an organ. Mono but with a 12 or 15" Bass driver & a smaller mid/tweeter.

It looks to have a very decent choke input power supply (all those chokes make it a very special Frugal-phile(tm) amp, nost of the stuff i see doesn't even know what a choke is, and you've got 2!!) -- you might have to change some caps. From there the voltage is just right for a single-ended or push-pull 6V6, EL84 or 6AQ5 amp. Since the 6V6s are there already....

But, as mentioned you'd need a matching pair of OPTs to make a stereo amp. Single-ended would be easier as a starter project, you certainly wouldn't have a shortage of power supply.

The simpliest amp would use a pair of the 6V6 and 2 halves of the 6SN7s (either 1 tube or half each of 2 tubes -- the last also leaving you the versatility of playing with parallel, SRPP or Mu drivers). You could extend that into a parallel SE amp with 2 6V6 per side.

The Hammand 125ESE is a decent budget OPT, that being multi-tapped would give you the ability to play with things like that.

Something like the attached....

dave

 

[sweet]

I's guess that it came out of an organ. Mono but with a 12 or 15" Bass driver & a smaller mid/tweeter.

dave

You are right it came from an organ...it came from a hammond HR 40 tone cabinet that had 9-8" speakers and 2-12" speakers.

Do you think I should just scavange parts and start from scratch.
if this is what I should do what would be the best I could build with this...along with 2 OPT's I would not scrimp on them so give me suggestions.
Thanks Steve