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My original PSU doesn't work... What's wrong??
Old 13th November 2019
Here for the gear

My original PSU doesn't work... What's wrong??

Dear, All

Recently, I got vintage QuadEight Equalizer(EQ-444) without PSU.
So I made original PSU.(+-15V,+-28V)
But it didn't output correct voltage...

I think step-down transfer's capacity was not enough.
(I used 100V to 24Vx2, 200mA)
But it maybe another problem.
Take a look at this schematic for now.
Attached Thumbnails
My original PSU doesn't work... What's wrong??-4linepsu.jpg  
Attached Files
File Type: pdf 4LinePSU.pdf (50.4 KB, 32 views)
Old 16th November 2019
Here for the gear

any one?
Old 15th September 2020
Gear Maniac
YashN's Avatar
Check the rectifier area carefully. There are two nodes that aren't connected at all to the rest of the circuit.

There may be more issues, haven't checked.
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