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Old 1st March 2012, 11:22 AM   #81
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Modern versions of these mosfets are still available, note that these are vertical parts not laterals and the reason you see vbe multiplier. We could build this by using 2sj200/2sk1530.
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Old 1st March 2012, 11:35 AM   #82
AndrewT is offline AndrewT  Scotland
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Brain,
can you confirm they are To247 package?

Then we know they can't be 201/1530.
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Old 2nd March 2012, 12:03 PM   #83
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Quote:
Originally Posted by AndrewT View Post
can you confirm they are To247 package?
Hi Andrew, no, they're not TO-247 packages. The ones in my photo exactly match the Toshiba TO-3P package, right down to the three little manufacturing "dots".

See here:
TOSHIBA Packaging Info

Hitachi TO-3P packages look to be an exact match (visually) too:
HITACHI Example (example of package, not exact device).

Other TO-3P packages don't look quite the same (trawling through lots of google images).

Last edited by brianmarchant; 2nd March 2012 at 12:13 PM. Reason: Added link to Hitachi package
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Old 2nd March 2012, 01:36 PM   #84
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So Andrew, what do you make of the use of the current sources regarding the bias and overload protection??

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Old 2nd March 2012, 01:39 PM   #85
AndrewT is offline AndrewT  Scotland
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I briefly looked at one of the schematics. But as I came to realise, there are at least 4versions of the mos series and to date no one has agreed if any are accurately portrayed in this Thread.
There is no point in commenting until we have some facts, not conjecture.
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Old 2nd March 2012, 09:09 PM   #86
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The supermos500 (?) pdf schematic seems plausible.

I meant to say current mirrors...
That and the zener diodes...

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Old 6th June 2012, 08:28 PM   #87
Simtu is offline Simtu  England
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Just come across this thread;

Still have a pair of Supermos 2 500watt modules as part of a dual mono power amp that I put together around 1990. Still use them occasionally and still working perfectly despite all the horror stories. Was always pretty impressed by the sound. Just finished a pair of Hypex Ncores - amazing difference another 20 years of amp development makes.
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Old 6th June 2012, 10:04 PM   #88
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You are saying that you prefer the Hypex amps??

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Old 23rd June 2012, 09:22 PM   #89
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Would you be interested in selling your Supermos 2's?
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Old 20th February 2013, 04:26 PM   #90
jerryo is offline jerryo  Isle of Man
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There is a nice pair of Supermos 1 mono power amps on eBay at the moment, and in full working order!
Rare chance to buy a pair.

Just thought I would let you all know.

Cheers
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