Sansui B-2102, huge SS for parts or repair: $75 obo - diyAudio
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Old 19th September 2008, 04:56 PM   #1
pjanda1 is offline pjanda1  United States
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Default Sansui B-2102, huge SS for parts or repair: $75 obo

This monster is in excellent cosmetic shape, but one of the dual attenuator knobs is missing. One of the 470uf PS caps (from the board at the back left of the front panel) blew. It doesn't look like any repairs were ever attempted; somebody just pulled the fuses and left it for dead. I can't imagine it isn't repairable, but this would also be a great source of SS parts. The power transformer is gigantic. The four big PS caps are 8200uf 95Vs. It has gorgeous heatsinks and all sorts of useful looking little parts. My wife is out of town with the digicam, but here are a couple of links.

Here one is playing naked on you tube (good shots of internals):
http://www.youtube.com/watch?v=Pt3MFhllEzM

An ad with exterior pics:
http://www.canuckaudiomart.com/detai...k_400_200wchan

Service manual PDFs:
http://www.hifi-museum.com/js/san/b2102_fs.htm

Buyer pays shipping, paypal preferred, sold as-is, $75 o.b.o.


pj
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Old 19th September 2008, 07:15 PM   #2
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I'm intrigued by this...do you know what the secondary voltage is on the transformer? The schematics at Hi-Fi Musuem are barely legible.
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Old 19th September 2008, 07:15 PM   #3
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Alright, after closely combing the schematics and straining my eye entirely too hard, I'm pretty sure I see several voltage test points at 42V. So I'm thinking the transformer probably has something like 45V secondaries.
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Old 19th September 2008, 07:25 PM   #4
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If the DC test points were +/- 42, wouldn't the transformer have ~30V secondaries?
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Old 19th September 2008, 07:51 PM   #5
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The schematic is very low-resolution and I think that they labeled the power supply as 'power amp', which threw me off. I had initially read it as the amplifier boards themselves having Vin of 42V, but I think you're right (i.e. the power supplies have Vin of 42V) because 42V is the highest voltage I can see on the schematic.

Thanks!
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Old 19th September 2008, 08:05 PM   #6
pjanda1 is offline pjanda1  United States
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I too found the schematic pretty unreadable, but I thought, correctly, that somebody might be motivated to squint at it for long enough to see something. It's a huge power transformer (I haven't had much experience with big SS though) at ~4.5" high by ~5.25" diameter. The cover feels rock solid to the tap as well, so it is no mere sheet metal hiding something less than spectacular. I'm assume the voltage switch means it has three primaries, 120, 220 and 240V. I've never before seen a SS amp with an output impedance switch. I don't really want to mess with this thing, otherwise I'd try and fix it and sell it as working. It is awfully cool. Buy it before I decide to keep it and tear it apart!

pj
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Old 19th September 2008, 08:56 PM   #7
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pjanda1, I'd like to discuss this unit with you further but I don't yet have enough posts to email you. Can you get in contact with me?

Thanks in advance!
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Old 19th September 2008, 11:42 PM   #8
pjanda1 is offline pjanda1  United States
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MoodySteve,
You aren't allowing emails via this board. If you alter your account preferences, I can then email you.

Everybody:
I'm going to deal with you in the order you've contacted me. However, if I'm interpreting your emails correctly, I've yet to receive an unconditional $75 +shipping. If somebody agrees to that, it's yours.

pj
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Old 20th September 2008, 12:03 AM   #9
pjanda1 is offline pjanda1  United States
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Sold. I'll let the rest of you know if it falls through. Wow, I should have asked for more $$!

pj
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