Compact PCB For All JFET Circlotron - diyAudio
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Compact PCB For All JFET Circlotron

Posted 24th January 2011 at 11:59 PM by Michael Rothacher
Updated 2nd October 2011 at 11:59 AM by Michael Rothacher

This is the artwork for the PCB in the pictures. It fits into the ExpressPCB miniboard profile so it's a little cheaper to have made.

It will be necessary to check the orientation of the bias pots (I can't remember). I wouldn't want you to blow-up your $30 JFETs.
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  1. Old Comment
    ichiban's Avatar
    I've been searching for the schematic of the JFET version with no luck. Could someone point me to it? Thanks in advance.
    Posted 5th February 2011 at 07:08 PM by ichiban ichiban is offline
    Updated 8th February 2011 at 06:20 PM by Michael Rothacher
  2. Old Comment
    Michael Rothacher's Avatar
    The entire article can be found at Pass DIY.

    There are no changes in the JFET version. Just drop 'em in.

    Only the bias adjustment is different, since the Power JFETs bias up around 2V.

    The same instructions apply.
    Posted 8th February 2011 at 06:18 PM by Michael Rothacher Michael Rothacher is offline
  3. Old Comment
    Michael Rothacher's Avatar
    I still adjust for around 1.2A through the output stage. The Vgs will depend on the particular sample and should fall into the 1-2V range.
    Posted 27th November 2011 at 12:22 PM by Michael Rothacher Michael Rothacher is offline
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