I'm happy to report that the goldenreference low voltage dual
power supply works as designed, and tests less than 1 microvolt
of noise. Going to have to take it to work and put it in a screen
room to really measure the noise.
http://gilmore.chem.northwestern.edu/goldenreferencedual.jpg
however there is one silkscreen error seen by the extra + near the
47uf cap on the right side. I will update the files shortly.
All 4 of the 47uf caps need to have their plus sides pointing to the
Hmmm.
Built up a GRLV Plus board set for 35Vdc. Testing with a variac at ~20Vac in or so, output is around 20Vdc. However, D1 is not lit, and Q1 Vce is 0V. I've gone thru and checked that I have PNPs/NPNs in the right places, right parts, caps in correctly, etc. Changed out Q1/Q3/Q14, same problem. LED is in right as well. Scratching my head right now.
Q14 Vbe 0.65Vdc
EDIT: why that would be the opamp locking up Dave...
Raised the voltage on the variac and things