creal said:
Hi Ian and everybody,
I have question about the PM EQ.
I like to build this pair in a 500 format.
The PCB is 1.5 inches wide by 2.1 inches high and you need two for each EQ. I don't know if you will get two PCBS and the four pots that go with them into a 500 format.
I like to make a 600 ohms version with the PPA boards as amp.
I have two 1:1 600/600 ohms (neve VT24499) and four edcor XSM600/10K(1:4.1) in stock
What's the mods to do?
Does it need to change some res or pot values?
Basically you need to divide the pot values by 4.7, so the 4K7 becomes 1K, the 47K becomes 10K and the 470K becomes 100K just like the original Pultec.
Then you need to multiply all the capacitor values by 4.7
Cheers
Ian