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Old 14th January 2011, 06:20 PM   #571
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yes, the FirstWatt J2 use a CCS on output stage to fix the current also when temperature increase.
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Old 14th January 2011, 06:24 PM   #572
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nope
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Old 14th January 2011, 06:33 PM   #573
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Here is all one need to know about the output stage topology used in the J2 in order to make a clone that's close enough to contain the interesting characteristics!

The Good Old Days & More SRPP

(Scroll down to "Even More Impedance-Multiplier Circuitry")
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Old 14th January 2011, 06:46 PM   #574
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Quote:
Originally Posted by Zen Mod View Post
let's say just that Mighty ZM measured that

not thoroughly with CCS biasing , but with plain power resistor between PSU and drain

gate was tied to drain , of course

in any case - let them bleed ......... and do not worry too much

Very good ZM! Time to get back to the Circlotron circuit. With JFETs this time...
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Old 14th January 2011, 06:58 PM   #575
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Looks like J2 thread is awaking
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Old 14th January 2011, 07:42 PM   #576
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not with me , Bubba

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Old 14th January 2011, 09:22 PM   #577
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My J2 clone is done and dusted

Last edited by Tazzz; 14th January 2011 at 09:39 PM.
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Old 14th January 2011, 09:50 PM   #578
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I still need to buy some Sic Jfets first.
Nah, to many amps there.
Need to sell some.
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Old 15th January 2011, 09:10 AM   #579
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bobodioulasso you can gift one to me
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Old 15th January 2011, 09:16 PM   #580
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Do you want speakers also?
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