carl assitance requested

[Unregistered]

am in progress of building opt 2 of hammerhead.. and am at the calibration stage. Cant seem to get the vr18 to get smack on zero.. is it suppose to be alligned smack on zero or can it drift somewhat .. it seems to be a bit of a detector in it self when i go near it ... I can Get it close to zero .. but when i get up from my bench and go away it seems to go up or down 20mV
Am using the pcb version.
thanks in advance

[gef12]

dont be shy

can anyone reply to this
thanks

[Carl-NC]

That's strange... I thought I had replied to this, but I guess I forgot to actually post the message... duh...

OK, so ±20mV is no big deal. That's ±20uV at the input. Continue with assy/cal.

- Carl