Bill Janssen wrote: > On my unit White is Common for the other voltage leads and blue is not used.
Yes Bill, Now I've had a bit of a poke round, the white is common, it's connected to the ground plane on the main PCB, and the blue wire is cut off just behind the grommet. My Thunderbolt lives! The replacement PSU seems to be working like a charm and my trusty old MF1000 frequency counter (bought in the 1980s) is showing that the 10MHz output is 10.00003MHz. Which I don't think is bad for such an old piece of test gear that has never been recalibrated since I bought it. Next job is to find that software that was mentioned for looking at the output from the 9 pin D socket. Although, I seem to think someone said it was RS442 not RS232? I'm using a 5V powered antenna that I got with some Aisin GPS boards many years ago. Next job is to make an SMA socket to F-Type plug adapter cable for the motorola antenna. Dave (G0DJA) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.