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JFET/MOSFET complementary-differential preamplifier
JFET/MOSFET complementary-differential preamplifier
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Old 26th January 2011, 10:50 AM   #1
PMA is offline PMA  Europe
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JFET/MOSFET complementary-differential preamplifier
Default JFET/MOSFET complementary-differential preamplifier

I have a new JFET/MOSFET complementary-differential preamplifier, please visit

PRE complementary-differential preamplifier

and see the attached images.
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Old 27th January 2011, 08:28 AM   #2
Bonsai is offline Bonsai  Europe
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Looks very nice PMA - simple and elegant!

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Old 27th January 2011, 08:51 AM   #3
PMA is offline PMA  Europe
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JFET/MOSFET complementary-differential preamplifier
Thanks, Bonsai. And sounds good
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Old 27th January 2011, 08:52 AM   #4
gk7 is offline gk7
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Yes simple and elegant (and good sounding), and important to mention IMHO: Itīs actually a John Curl design.
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Old 27th January 2011, 08:58 AM   #5
PMA is offline PMA  Europe
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JFET/MOSFET complementary-differential preamplifier
It might be Erno Borbely as well, and others
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Old 27th January 2011, 09:14 AM   #6
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I like it

Last edited by Workhorse; 27th January 2011 at 09:17 AM.
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Old 27th January 2011, 09:22 AM   #7
PMA is offline PMA  Europe
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JFET/MOSFET complementary-differential preamplifier
R1 and R2 values have to be selected according to Idss of the matched JFETs. But the task is not very difficult, and digital multimeter is enough to make it.
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Old 27th January 2011, 09:52 AM   #8
chlorofille is offline chlorofille  Malaysia
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Pavel,

How does this differ sonically to the Dispre 2 jfet ?
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Old 27th January 2011, 10:04 AM   #9
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JFET/MOSFET complementary-differential preamplifier
Hi chlorofille,

yes, it sounds a bit different, and I would guess that listener's taste would judge.

Regards,
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Old 27th January 2011, 01:33 PM   #10
kannan_s is offline kannan_s  United States
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Hi PMA
I expected a small Power amp based on this topology as we see many pre amps are around. Probably you would be the one to come with some DIY design ?
thanks for bringing out JC' s ideas
Kannan
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