Can you identify this AMP??

tony Ma · 10th April 2011, 12:47 AM

I just got this amp
the guy said that is amp 2A3
Can some one identify this amp and give me a hint to operate this amp?
I believe the transformer is HADLEY

Tom Bavis · 10th April 2011, 05:04 PM

The relay makes me think jukebox - the heaters were switched on as the play cycle started... 4 2A3s and a 5Z3? No sockets for small-signal tubes, which would be 5-6 pins.

Eli Duttman · 10th April 2011, 05:43 PM

Tom,

I concur in your analysis. That thing is OLD. I see no evidence of 'lytics, whatsoever. Is that a rubber band I see holding a 0.1 μF. axial lead cap. in place? That might be the only cap. that needs "automatic" replacement, as the PSU parts seem to be "oilers". I wonder what is concealed by the tape wrapping. Do you think that there a 2 channels, for a pair of speakers? Where are the power and I/P signal connections?

tony Ma · 10th April 2011, 11:12 PM

Hmmm what should I do? I thought I found diamond in the rack but it seems not

bear · 10th April 2011, 11:20 PM

likely external PS, with interstage xfmrs?? dunno... maybe 4 x 2A3 outputs...

guessing

_-_-bear

kevinkr · 10th April 2011, 11:53 PM

I don't think it is an amp at all, but possibly some sort of power supply for who knows what. I'm more or less clueless, but I think I see a lot of recognizable rectifier socket wiring (at least 3) and not much else..

HollowState · 11th April 2011, 01:57 AM

Quote:

Originally Posted by kevinkr

I don't think it is an amp at all,

Neither do I. I enlarged the picture and took a good look. There are three cut cable bundles that were probably for power feed and control to and from something else.

10th April 2011, 05:43 PM	#3
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	Tom, I concur in your analysis. That thing is OLD. I see no evidence of 'lytics, whatsoever. Is that a rubber band I see holding a 0.1 μF. axial lead cap. in place? That might be the only cap. that needs "automatic" replacement, as the PSU parts seem to be "oilers". I wonder what is concealed by the tape wrapping. Do you think that there a 2 channels, for a pair of speakers? Where are the power and I/P signal connections? __________________ Eli D.

10th April 2011, 11:20 PM	#5
bear expert in tautology diyAudio Member Join Date: Apr 2002 Location: New York State USA	likely external PS, with interstage xfmrs?? dunno... maybe 4 x 2A3 outputs... guessing _-_-bear __________________ _-_-bear http://www.bearlabs.com [...2SJ74 Toshiba bogus asian parts - beware! ] -- Btw, I don't actually know anything, FYI --

10th April 2011, 11:53 PM	#6
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I don't think it is an amp at all, but possibly some sort of power supply for who knows what. I'm more or less clueless, but I think I see a lot of recognizable rectifier socket wiring (at least 3) and not much else.. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

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10th April 2011, 05:04 PM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	The relay makes me think jukebox - the heaters were switched on as the play cycle started... 4 2A3s and a 5Z3? No sockets for small-signal tubes, which would be 5-6 pins.

10th April 2011, 11:12 PM	#4
tony Ma diyAudio Member Join Date: Feb 2011	Hmmm what should I do? I thought I found diamond in the rack but it seems not

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