kb8tq@n1k.org said: > If still nothing, put a scope on the RX output of the serial chip in the > 3801. Do the same for the TX input of the same chip. I think the Z3801A prints out a version string at power up. Sometimes that helps debug the transmit path. -- These are my opinions. I hate spam.

When I removed it from storage, communication was gone. It took a very long while to lock, but did so and maintained lock for a couple of weeks before going into holdover. It then locked back for a while. I definitely need to do more trouble shooting on it before I give up completely. It was the best unit I have. I also have a couple of Thunderbolts, but I don't consider them in the same class as the Z3801. I see Z3801s for sale on eBay, but I am reluctant to buy one. They are at an age where things are going to fail. Also, for my needs, a Thunderbolt would suffice. I just like the Z3801 better and would really like to get it going again. On Sun, Mar 4, 2018 at 9:27 PM, Hal Murray <hmurray@megapathdsl.net> wrote: > > kb8tq@n1k.org said: > > If still nothing, put a scope on the RX output of the serial chip in the > > 3801. Do the same for the TX input of the same chip. > > I think the Z3801A prints out a version string at power up. Sometimes that > helps debug the transmit path. > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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. >