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Old 23rd March 2011, 05:45 PM   #191
juma is offline juma  Serbia
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The most linear region for these JFETs is near the Idss. I usually use them at 70-90% of Idss. That should not worry you - if you are afraid that your JFETs dissipate too much power, you can easily decrease the power supply voltage to +/-15V.

Using higher Idss JFETs won't bring improvement in this case.
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Old 11th July 2011, 04:02 AM   #192
crt is offline crt  Indonesia
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Only get this so far

Still waiting for J313/K2013 and heatsink of course

Click the image to open in full size.


ps
Can this Amp drive Electrostatic Headphone ?
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Old 23rd July 2011, 09:38 AM   #193
crt is offline crt  Indonesia
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Well after some "trouble", finally finished this up
here some picture

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Result
This amp just give me a BIG SMILE
Thank's Juma for replying my PM many times
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Old 23rd July 2011, 11:29 AM   #194
juma is offline juma  Serbia
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You are welcome! I'm glad you like it

Nice job, BTW
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Old 23rd July 2011, 12:07 PM   #195
CeeVee is offline CeeVee  Portugal
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Very nice work CRT....congrats
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Old 23rd July 2011, 09:25 PM   #196
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Oooooooooooo.....

Shiny.

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Old 26th July 2011, 02:22 PM   #197
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What is the reason for lots of small capacitors instead of just a few bigger ones?
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Old 26th July 2011, 02:23 PM   #198
CeeVee is offline CeeVee  Portugal
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Looks nice and neat, cheap (a lot of small ones are cheaper than one big one ....and a more flexible layout possibilities! ), FC ( i might be wrong but those look like panasonic FCs ) don't come in BIG packages..... would be my reasoning.

Last edited by CeeVee; 26th July 2011 at 02:32 PM.
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Old 26th July 2011, 02:45 PM   #199
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Okay. I thought there might some kind of sonic improvement using lots of smaller caps instead of few larger ones.
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Old 26th July 2011, 03:14 PM   #200
EUVL is offline EUVL  Europe
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> Looks nice and neat, cheap, FC don't come in BIG packages..... would be my reasoning.

You forgot one very important one -- much higher total ripple current.
Suggest you also read how the slit foil caps work.


Patrick
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