Gefell UM 92.1s PSU DIY

[dinesh]

Hi,
My friend got gefell UM 92.1s mic without PSU.
Is it possible to modify U47 PSU to use with this mic? Do any one have the schematics & Pinout?

Thanks
Dinesh

 

[moamps]

The schematic you can find here:
http://www.tab-funkenwerk.com/id71.html
You can't use U47 PSU. Gyrafs PSU for GIC mike can be used with few small mods.
http://www.gyraf.dk/gy_pd/g7/gic_s.gif

 

[Banzai]

A Chinese supply rewired for the correct pinout would work too. Just needs two circuit mods:

– Remove diode in position D11, and replace with bridge. If needed add a small dropping resistor, but shouldn't be a problem using mic with ~ 6V heater

– Replace zeners D5 and D6 with 2x 60V

 

[dinesh]

Thanks moamps & banzai.  I will tell to my friend.