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--[[User:Zjsimmons|Zjsimmons]] ([[User talk:Zjsimmons|talk]]) 16:01, 8 December 2014 (CST)
Re: circuits One issue is coming into focus: the source of the 10s of kHz noise on the circuit rails, that seems to bleed through into the error signal. It appears that its origin is the heater in the lm399s. I'm going to try running them without the heaters and see what happens. Running without the heaters squelches the kHz level noise and doesn't seem to prevent any ffb locking. Maybe this is the way we should run them.
I tried an inline inverter. Tough to use as the input to the driver cannot go negative and the lock box doesn't really put out a negative DC. As a result, when you flip (the positive) signal you get something negative or close, not much room to operate. Also, one of the inverters seems to rail which is problematic.
Also, interestingly, looking at the previous lockbox, there doesn't seem to be any discernible square-wave bleed-through to the error signal monitor. I think that may be related to our issues...
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