Preliminary: "August 20 2007"

Latest Update: "April, 2012"

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This Circuit is not an origional design of mine.
Although this was not an origional idea of the "D14 article" either.
I have seen Previous designs of this before, even in Old Tube Designs.

However, Due to numerous requests I designed a PCB for it,
and in the process I also made a few minor changes,

1) Because 3 Position switches are not very common,
   I incorporated Centre Off, Spdt Toggle Switches.

2) Added some high frequency filtering capacitors to the supply.

3) A higher power mosfet for the output.

4) An Optional bypass diode across the output.

Click Here for My Revised Schematic and PCB.

Click Here to see a Picture Overlay.
Although I used Trimpots for this Proto,
Most Likely Standard Pots would be used on a final unit.


I Do NOT Supply Any Parts for this Project.





Experiment, Have Fun And Enjoy.


All Imformation in this Article is "Copyright protected".

 Chemelec 
 *Copyright © 2007*