[sdiy] Moog 909 power supply component ID question

[Michael Buchstaller]

>But there is a Zener diode D6 whose value i cannot read.
>(it may be 1N821, but i am not sure)
>Which voltage should it have ?`

1N821 is a 6.2V Zener, so i tested it with a 6.8V one - it works.
But i had big problems getting the -6V side work.
Found out after verifying each and every thing that i had make a read
error and put a 27K resistor at the top of the diff amp Q4/Q3 (instead of 2.2K)

Now it looks fine and works.

BUT: How much current is this power supply supposed to deliver ?
Loading with 20 or 70 mA works, but if i connect an ECC81 heater (6.3V/150 mA)
as a load, the -6V line sags down to -2.5V, and the +12V outputs over 20V.
Have i done something seriously wrong, or is there any type of current limiting
that i did not see ?

Any help woud be very appreciated !!!


-Michael Buchstaller