| br>Hi dudes. Posted this over on Euro but didn't get much love so I thought I'd try here with my DIY family . Anyway, I built a DIY full kit of the Elby "Panther" Tube VCA. Everything went OK, but the calibration is not going to plan exactly.
The instructions say to feed a 20Hz 2Vpp triangle and adjust the fine trim pot to minimize bleed and then turn it back 1/2 a turn. Then turn the coarse to get 5Vpp with the gain all the way up. If I do this, I can only get about 4.1Vpp with the trimmer at full CCW. Also, the unit has a distinct mains hum that I don't hear really with my other units in the same case (RackBrute).
Any advice from anyone who has built this guy before? I'll double check all the components and soldering, but I have a pretty good track record for being thorough and not messing stuff like that up. br> br>