BigUgly Microphone

The BigUgly is basically the MXL 2001 "RoyerMod" with the Gyraf G7 pattern switching scheme and grid resistor. The pattern switching is pretty simple on this PSU version. PCB's are available. PM Blue Jinn at GroupDIY or in the comments at the blog. There is an updated PSU board. If enough interest I can have some fabbed. Thanks to BigUgly for making this available, and permission to fab boards.

You may have to adjust R1 or input AC voltage on the PSU to get desired B+ of 100-120VDC. I use a 70-0-70 xfmr and a 330 ohm resistor and get exactly 100VDC unloaded.

** There is a bad schematic floating around with 190VAC in that is CLEARLY WRONG
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Blue Jinn,
Jun 27, 2018, 1:47 PM
ą
Blue Jinn,
Jun 27, 2018, 1:47 PM
ą
Blue Jinn,
Jun 27, 2018, 1:47 PM
ą
Blue Jinn,
Jun 27, 2018, 1:47 PM
Ċ
Blue Jinn,
Jun 27, 2018, 1:47 PM
ą
Blue Jinn,
Jun 27, 2018, 1:51 PM
Ċ
Blue Jinn,
Jun 27, 2018, 1:47 PM
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