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"Light Touch" Class A Amp
"Light Touch" Class A Amp
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Old 15th June 2017, 08:50 AM   #41
Soundhappy is online now Soundhappy  France
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"Light Touch" Class A Amp
Quote:
Originally Posted by Nelson Pass View Post
Speaking of not holding your breath, here's
my 3 year old 2SK77B amp board.

Gotta stuff it up one of these days.....

Not breath hold but 2SK77B make my eye's large open
Hope for more update , news about Mr Pass rare SIT amplifier.
Best regards
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Old 15th June 2017, 04:14 PM   #42
Soundhappy is online now Soundhappy  France
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"Light Touch" Class A Amp
" Light Touch " and 2SK77B amplifiers future presentations on BAF 2017/18 ?
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Old 15th June 2017, 08:45 PM   #43
wrenchone is offline wrenchone  United States
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I plan to do something SIT-ish with my IXYS monster fets, so they may end up acting /sounding(?) like the 2SK77Bs. Again, no breath-holding is advised, or you my wind up purple and gasping...
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Old 15th June 2017, 10:24 PM   #44
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Zen Mod View Post
The Funny One is pretty successful in ignoring me

I wonder why.
Hahaha
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Old 16th June 2017, 07:21 PM   #45
wrenchone is offline wrenchone  United States
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Well, all the parts on the Light Touch except for the three main semiconductors are stuffed - there weren't that many, after all. The boards will probably get mounted on the heat sinks I was using for Aleph McSIT at BA16, while those boards will get shuffled on a common heat sink (Sunnyvale's Weird Stuff to the rescue) and bundled with a chassis and power supply (possibly with a whisper of forced air). As usual, the worst part of the project is dealing with the chassis and power supplies.

Last edited by wrenchone; 16th June 2017 at 07:24 PM.
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Old 17th June 2017, 02:56 AM   #46
wrenchone is offline wrenchone  United States
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Here's what it looks like so far - it's a bitsy sort of board that will be perched on a big, big heat sink.
Attached Images
File Type: jpg P1000230.jpg (19.7 KB, 297 views)
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Old 17th June 2017, 11:57 AM   #47
Michael Rothacher is offline Michael Rothacher  United States
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"Light Touch" Class A Amp
Looking good
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Old 20th June 2017, 07:17 PM   #48
wrenchone is offline wrenchone  United States
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I thought I was going to be mounting the boards to heat sinks over the past weekend, but I managed to break my 6-32 tap. Once I get some replacements (and maybe it's time to get a decent tap set from someone like Greenlee). I'll have another go at it.
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Old 24th June 2017, 12:13 AM   #49
wrenchone is offline wrenchone  United States
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Have taps, will give another try this weekend.
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Old 28th June 2017, 02:43 PM   #50
2 picoDumbs is offline 2 picoDumbs  Australia
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I'm going to try these on an F6 circuit.
Nice smooth capacitance curves
RthJC 0.35C/W
Decent amount of transconductance for a single stage amp.

Not sure if this interests you, but thought I would share the love.
Peace brother.

http://ixapps.ixys.com/DataSheet/DS1...TH64N10L2).pdf

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