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Old 21st June 2006, 09:50 PM   #1
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Default Papa-seems that you already burn your free time here,so maybe you can take a peek at

http://www.diyaudio.com/forums/showt...958#post944958


that is just a rough sketch;
mebbe you can comment something, wakoo/short/hugger
mugger....?



here or there
or everywhere
or even
nowhere


TIA ,as always......
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Old 22nd June 2006, 03:52 PM   #2
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Default Re: Papa-seems that you already burn your free time here,so maybe you can take a peek at

Quote:
Originally posted by choky
[B
mebbe you can comment something, wakoo/short/hugger
mugger....?

...
[/B]
You have to re-write,

"Dear Nelson, could you please review it and give me any advice?"

Muhahahahahahahah . . . . . . . . . .
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Old 22nd June 2006, 04:10 PM   #3
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Choky is in need of a good spanking again.
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Old 22nd June 2006, 06:01 PM   #4
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It so happens that I built almost exactly the same circuit, although
I don't seem to have my curves here on the computer. I used
9240's and 240's, .47 ohm Source resistors, and pots to trim
the (1k) resistors instead of trimming between the JFETs. This
allows trimming of all parameters. Also, I did not degenerate
the Sources of the JFETs with the 22 ohm resistors.

It worked fine and sounded good. The performance will be very
bias dependent, and you will want to put as much bias on the
output stage as you can. I recall that I ran the outputs at
about 2A each, and I got about 100 watts out of it.
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Old 22nd June 2006, 07:17 PM   #5
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Quote:
Originally posted by Nelson Pass
It so happens that I built almost exactly the same circuit, although
I don't seem to have my curves here on the computer. I used
9240's and 240's, .47 ohm Source resistors, and pots to trim
the (1k) resistors instead of trimming between the JFETs. This
allows trimming of all parameters. Also, I did not degenerate
the Sources of the JFETs with the 22 ohm resistors.

It worked fine and sounded good. The performance will be very
bias dependent, and you will want to put as much bias on the
output stage as you can. I recall that I ran the outputs at
about 2A each, and I got about 100 watts out of it.

tnx Papa,as always

I intend to make it,if I do , with at least 2A through each side .......



hehe-I'm glad that you responded before any sort of spanking
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Old 23rd June 2006, 11:06 PM   #6
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Papa -if I may ask another one question....

what is your opinion/attitude about using diodes/zenner/led as level shifters in active stages?

example-if I need to use weeny jfet in place with higher voltage,and I can achieve that only with cascoding or I can use mentioned elements connected to source(s)......?
I saw that already somewhere on the net,but I'm interested what you'll say........
even if lack of this arrangement in your constructions is evident
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Old 25th June 2006, 11:38 PM   #7
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Default and another one: pat5343166 ????

veeery rough sketch.

good thinking or not?
Attached Images
File Type: gif is it 5343166.gif (10.9 KB, 768 views)
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Old 27th June 2006, 04:58 PM   #8
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still not want to abuse Papa's personal e-mail box.........

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Old 27th June 2006, 06:12 PM   #9
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You cascode transistors are inverted Source for Drain.

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Old 27th June 2006, 09:09 PM   #10
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Quote:
Originally posted by Nelson Pass
You cascode transistors are inverted Source for Drain.

nah,that is just minor mistake certainly made in >cut'n'paste< game pretty late at night.........

anyway-tnx Papa- like always,your answer is good as best riddle
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