Discussion in 'Exclusively Sansui' started by Willy6, Jun 17, 2017.
Does anyone know of a suitable replacement for the 2SC2607 and 2SA1116 outputs?
2SC2607 - NPN = MJ21196G - http://www.mouser.co.uk/ProductDetail/ON-Semiconductor/MJ21196G/?qs=sGAEpiMZZMshyDBzk1/Wi/PUgtclNldlzlFQOXdLBkg=
2SA1116 - PNP = MJ21195G - http://www.mouser.co.uk/ProductDetail/ON-Semiconductor/MJ21195G/?qs=sGAEpiMZZMshyDBzk1/Wi/PUgtclNldly3XRm7%2bzEL0=
I noticed someone using the above transistors for a rebuild the other day - and wondered why they didn't use the normally preferred MJ21193G/94G.
I noticed on ebay that little diode from the UK has the original SanKen 2SC2607,2SA1116 transistors I wonder if they are counterfeit or the real deal?
Don't count on it, you'll pay inflated prices, and they haven't been made for decades.
I've had fake devices from Little Diode before so I don't use them any more.
New On-Semi devices are far superior to any transistor made in the 1970's....
What are the rail voltages on the 9700? Probably can use something a little closer to the originals, but really its splitting hairs at the end of the day....
MJ15003/15004 are probably closer.....
Filter caps and rail voltage of the G-9700 are listed as ±84.3VDC in the service manual.
Willy, There are still Real Sanken 2SC2608 and 2SA1117 outputs kicking around.
totally compatible, bring your own solder.
All parameters are exactly/the same as 2607 and 1116 except the output power/voltage is higher/headroom.
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Nice pictures but old I think, the quantities pictured are not available today. If you want to pay between $10 and $35 for ones and two's of potentially counterfeit transistors that's fine.
The notable exception is anything advertised there (on ebay) from AK member Kale, (ebay = kale1_1) when he says something is genuine - it is.
Your perfect replacements are right here:
I won't buy from Little Diode any more, I have got fakes off them before, I'm done with the whole "gotta be genuine" thing, modern TO-3's are superior in construction, manufacturing has come a long way since the '70s.
I just looked them up and they are both available, but I can't see any difference between them....
See I would be using MJ15003/15004, they are 140V instead of 250v but they are 20 amp rather than 16 amp the other ones are, but they are 2mhz instead of the 4mhz, not sure if that is a factor......probably not I'd say...
I think I read that the 93/94 pair are a bit more linear (ref: curve family) than the 95/96 pair, but agree not much in it.
Those MJ15003/4's have caught my eye too lately as McIntosh is quite fond of them.
However have had nothing but good luck with the 93/4's and never seen one fail.
I think McIntosh not only use them because of the lower ft and voltage, but they are higher current, and since the McIntosh Autotransformer amps run at 2.1Ω on the other side of the Xfrmr, I'd say the those devices are probably better in that respect...
The 95/96 have a wider SOA, but not really necessary in most anything out there that uses a TO-3 that I am aware of.
There are more than those shown and the pictures not that old.
I got in touch with Kale and things are looking up...
Some may wish to look into the January 2017 thread on how to spot fakes across the internet...
You can weight 2SA and 2SC to find out their worth before you install.
Originals typically weight around 18 to 20 grams plus or minus.
Originals Sanken as pulled seem to weight ever so slightly less than new old stock replacement Sanken
but perhaps this was a difference in batch runs over a period of time- but still -- all real Sanken are in the 18 to 20 gram range..
Fake Sanken weight in under 14 grams, typically 12 to 14 but never remotely close to originals at 18+ grams..
China has flooded the world with fake Sanken that will destroy your restoration shortly after power up.
They are advertised widely around the world and throughout the USA as "NOS" or ripped from equipment-Bullshit.
ORIGINAL SANKEN REPLACEMENT TRANSISTORS
ORIGINAL SANKEN -AS PULLED FROM SANSUI G9700
FAKE SANKEN TRANSISTORS
AVAILABLE WIDELY IN USA - GREAT BRITAIN - ASIA
BEING SOLD AS NOS
ORIGINAL VERSUS FAKE SANKEN (ORIGINAL AS PULLED FROM SANSUI G9700)
That's brilliant Moe.
You made my heart stop when you stated the 93/94s are obsolete. I just checked Mouser and I don't see anything about being obsolete. The non G (lead) version is obsolete though, more info please.
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