Just a word that I’ve noticed that the later revs of the Mini D temp stabilized VCO board had some changes made since the original service manual was published.
These changes were noted in later documents, but are not as widely available.
I imagine many boards don’t have these changes made.
R24, R64 and R102 changed from 100 ohms to 93.5 ohms.
R27, R67 and R105 changed from 49.9K to 75K.
All resistors are 1% or better.
These last 3 resistors go to the temperature setting pins on the uA726s.
Moog apparently lowered their temperature later on.
This probably to lower current draw, which would provide lower internal temperatures and less strain on the power supply.
It might even lower some types of distortion.
I’ve documented many factory changes to the “standard” vco boards, but it’s the first time I realized that the later boards had any major changes at all.