MeToo2
Well-known member
Final photos after mounting everything up: I may still get some brass /etched labels done for the controls.
lewilson said:Nice,
what contol voltages are you getting?
How is it handling your " Dutch techno square waves " ??
They're actually just cheap meters from eBay user "jims_audio" from Hong Kong with retro styling & costing 10 euros or so each. More for show really. They are currently wired to give an indication of gain reduction (tap off the cathode resistor of the signal amp.) Apparently the original 660 also didn't have true VU meters either as the diode was removed. They seem to be pretty useful for detecting the onset of compression (coarse setting of the DC and AC threshold on the control amp) but any fine tuning means using your ears. I have a 4 pole 2 way switch that I'm thinking of adding later to allow me to switch to monitor output level, but they're almost certainly not true ballistic VU meters so I'm not sure how useful that'd be (still need to test). I found a standard multimeter and a high voltage oscilloscope across one of the screen grid stopper resistors was as good a way as any for checking for bias balance on the signal amp.syn said:The unit looks fantastic. What are the VUs?
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