[sdiy] Ringmod not working

[Rutger Vlek]

Hello everyone,

i built a Ring Modulator based on the one in this schematic:

http://www.ele4music.com/pdfs/sbm.pdf

And i can't get it to work. I have an Oakley VCO and Oakley LFO (both 
working) going to the inputs, and nothing comes out. I checked the power, 
the HCF4011B pin-out and the other components. Everything is ok, but still 
it's not working....

Perhaps some knows what's going on inside my RingMod?

Kind Regards,

Rutger