Finished building my SB4000. Nice kit, thanks for making it so easy. I appreciated some of the little things, like enough space around the mount holes to allow for a washer so the nut wasn't digging into the PCB. Said to me that a lot of thought went into the design.
Everything is working well and the unit is calibrated and compresses as I would expect, except for one goofy problem. The bypass does not work, or more accurately, when bypassed, no sound goes through. I would expect just the opposite if there is an issue with the relays. 9.9 volts appear at the diodes on the 4 relays when the unit is engaged and I can hear them switching, and 0v when bypassed. When bypassed, I have 0 ohms between input and output xlr leads, so the connection is being made for the hard bypass. I do not have anything connected to the ext sidechain Checking to see if anyone has any ideas before I pull out the PCB.
UPDATE:
Was only relying on VU bargraph for conformation of signal being present. Changed setup to monitor actual audio, and bypass works just fine. Clearly, I/O VU bargraph is not showing signal while in bypass. In thinking about it for a bit, of course signal is not present in the circuit while in bypass as it is passed directly to the output connector, so, unable to measure signal with VU bargraph. Signal is no longer going through circuit.
OK, that's a wrap.
One very easy, well thought out kit. Many thanks Mike for making it happen.
