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Old 11th June 2012, 09:38 AM   #81
Salas is online now Salas  Greece
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Don't know, try it at same IDSS.
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Old 18th June 2012, 07:16 AM   #82
omer is offline omer  France
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other way for the 2 sk 170 bl mc step up
here (in french,sorry)
Prepre AKA Grain de Sel • LS3/5a le forum
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Old 18th June 2012, 01:11 PM   #83
Salas is online now Salas  Greece
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Folded cascode with current mirrors, OK, not that simple a concept anymore though.
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Old 27th March 2013, 03:25 AM   #84
batty is offline batty  Australia
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My new cart has optimum load of 200 ohms, do I just change R2 to 200 ohms? I have some Dale 210 ohm resistors, would these be OK?
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Old 27th March 2013, 04:10 AM   #85
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Yes.
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Old 27th March 2013, 04:29 AM   #86
batty is offline batty  Australia
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Thank You
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Old 30th September 2013, 05:52 AM   #87
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by omer View Post
other way for the 2 sk 170 bl mc step up
here (in french,sorry)
Prepre AKA Grain de Sel • LS3/5a le forum
Following it now
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Old 10th November 2015, 09:50 AM   #88
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Looking at the official Simplistic NJFET RIAA thread I want to change the Mc pre-pre with JFET-BJT cascode stage & local shunt type voltage stabilizer to keep Miller capacitance low. Is that a good idea ?

http://www.diyaudio.com/forums/attac..._pcb_guide.pdf

Erik.
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Old 10th November 2015, 11:00 AM   #89
Skorpio is offline Skorpio  Denmark
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Could the Circuit in post 2 be used with 2SJ74 instead, or will the higher input C be a problem?
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Old 11th November 2015, 04:55 PM   #90
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I'm willing to give a try at that MC step-up circuit. It seems easy to build and a much cheaper alternative to step up trafos.
I already have all the components needed, except the 2SK170s, of course. Now, the typical question : to find a reliable source for genuine Toshiba units.
On Ebay there're a number of vendors offering them. Some swear that theirs are genuine. Others even offer matched pairs or quads.
As a side note, I see that there's an available substitute : the LSK170 ( by Linear Systems) which performs as the original (or so they say).
http://www.micross.com/pdf/LSM_LSK170C_TO-92.pdf

Any opinion or experiences on the LSK170 or on buying 2SK170s ( Ebay or elsewhere) will be greatly appreciated.
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