Need help identifying Stromberg Carlson Amp

icefox · 19th October 2004, 01:37 PM

Guys,

Need some help identifying the Stromberg Carlson Amp. Here is some photo for you,

http://www.audiocircle.com/circles/m...view_album.php

My questions,

1. Is that mono integrated amp?
2. Is there a schematics for it on the net for free?
3. If no, where can I buy a schematic?
4. If it's integrated mono, anyone experience to mod it to a power amp?

iCefoX

Colt45 · 19th October 2004, 04:19 PM

looks like some sort of mono PP to me.

what tubes are they?

icefox · 19th October 2004, 04:38 PM

The guy who own it said it's "7072". I doubt that. I wonder if he mean 7027, a 6L6 variant.

Colt45 · 19th October 2004, 08:31 PM

yeah, 7027 seems about right. I knew it looked 6L6ish but not a 6L6

well whatever it is, its some sort of power pentode / tetrode.

so yeah, looks like a little noval (cant see because there is a shield on it) for driver and phase splitting

2x 6L6 or similar rated power tube, in push pull (because there is only 1 opt)

and 5Y3G ? (looks like) for rectifier..
I suppose it might be a 5U4.. no.. its too small to be..

well yeah. so then. pushpull mono deal.

Tom Bavis · 20th October 2004, 12:19 AM

Sure looks like the Stromberg Carlson ASR-432 mono integrated amp, 1959 vintage. 2-7025s, 6U8, 7027s, 5V4GA. I have the Sams Photofact folder, in my "to scan" pile.

icefox · 21st October 2004, 01:54 AM

Tom,

Base on your access to the schematics, would you please comment to possibility to mod this unit to MONO AMP. Basically disable the pre amp stage of the unit.

Does the unit come with any RIAA Stage?

Tom Bavis · 21st October 2004, 02:41 AM

I was mistaken - the number is AR-432.

Yes, it has a RIAA preamp. But just use an AUX input to bypass it. And the tone controls could be bypassed by cutting and connecting to the top of the volume control.

19th October 2004, 01:37 PM	#1
icefox diyAudio Member Join Date: Mar 2004 Location: asd	Need help identifying Stromberg Carlson Amp Guys, Need some help identifying the Stromberg Carlson Amp. Here is some photo for you, http://www.audiocircle.com/circles/m...view_album.php My questions, 1. Is that mono integrated amp? 2. Is there a schematics for it on the net for free? 3. If no, where can I buy a schematic? 4. If it's integrated mono, anyone experience to mod it to a power amp? iCefoX

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19th October 2004, 04:19 PM	#2
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	looks like some sort of mono PP to me. what tubes are they?

19th October 2004, 04:38 PM	#3
icefox diyAudio Member Join Date: Mar 2004 Location: asd	The guy who own it said it's "7072". I doubt that. I wonder if he mean 7027, a 6L6 variant.

19th October 2004, 08:31 PM	#4
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	yeah, 7027 seems about right. I knew it looked 6L6ish but not a 6L6 well whatever it is, its some sort of power pentode / tetrode. so yeah, looks like a little noval (cant see because there is a shield on it) for driver and phase splitting 2x 6L6 or similar rated power tube, in push pull (because there is only 1 opt) and 5Y3G ? (looks like) for rectifier.. I suppose it might be a 5U4.. no.. its too small to be.. well yeah. so then. pushpull mono deal.

20th October 2004, 12:19 AM	#5
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	Sure looks like the Stromberg Carlson ASR-432 mono integrated amp, 1959 vintage. 2-7025s, 6U8, 7027s, 5V4GA. I have the Sams Photofact folder, in my "to scan" pile.

21st October 2004, 01:54 AM	#6
icefox diyAudio Member Join Date: Mar 2004 Location: asd	Tom, Base on your access to the schematics, would you please comment to possibility to mod this unit to MONO AMP. Basically disable the pre amp stage of the unit. Does the unit come with any RIAA Stage?

21st October 2004, 02:41 AM	#7
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	I was mistaken - the number is AR-432. Yes, it has a RIAA preamp. But just use an AUX input to bypass it. And the tone controls could be bypassed by cutting and connecting to the top of the volume control.

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