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What kind of amp is this..I posted it earlier and the post got deleted.

75.128.188.58
Posted on February 20, 2015 at 21:06:44
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005






I picked it up for 50 bucks with all these extra tubes but it takes field coil drivers..Anyway,the OPT has a shorted secondary which is underneath.All the tubes being there are a nice quad of VT-115s and three 6L6gc black plates and a few 6SN7s ought be to worth the 50 that I paid.It also that big choke and some nice power trafos.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

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From a Baldwin organ, Michael... I learned a LOT about making a quiet amp from those guys... an old one~nT, posted on February 20, 2015 at 22:02:23
Cleantimestream
Audiophile

Posts: 7550
Location: Kentucky
Joined: June 30, 2005
 ~!
The Mind has No Firewall~ U.S. Army War College.

 

RE: From a Baldwin organ, Michael... I learned a LOT about making a quiet amp from those guys... an old one~nT, posted on February 21, 2015 at 08:38:21
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 Thanks Ken
Now maybe I can find a schematic for it.I was able to get it to come on by going direct to the primaries of the two power transformers and then I put in a 7.5k 15 watt resistor off the main B+ to get the screen voltage on the 6L6s.I think the resistor that supplies the screens and the rest of the circuit is in the field coil driver.
I just found a thread after you told me what they were.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

RE: What kind of amp is this..I posted it earlier and the post got deleted., posted on February 25, 2015 at 05:39:49
soundmotor
Audiophile

Posts: 71
Location: Northeast / MA
Joined: June 21, 2004
 Yep, Baldwin organ speaker cabinet amp. The power supply iron is very good. The output iron is very bad. I had a pair of these a long time ago and sold them to a builder. He used one of the amp's power supplies as the basis for a stereo 6550 amp IIRC. A complete set of power supply iron, multiple output and rectifier tubes, plus assorted bits was a value buy.

 

RE: What kind of amp is this..I posted it earlier and the post got deleted., posted on February 25, 2015 at 06:48:07
sony6060
Audiophile

Posts: 1465
Location: USA
Joined: August 8, 2014
 A giveaway of some organ amps is use of RF type air core inductors on the power tubes. I have not seen RF type inductors in home entertainment audio amplifiers.

 

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