A lot Rb's from that era have TTL level serial interfaces that can drive most RS-232 ports directly. The PRS-10, SRO100, and LPFRS are examples.

I see a jack labeled JT1. It has about 8 pins I remember. I wonder... > On Nov 30, 2017, at 7:11 PM, Mark Sims <holrum@hotmail.com> wrote: > > A lot Rb's from that era have TTL level serial interfaces that can drive most RS-232 ports directly. The PRS-10, SRO100, and LPFRS are examples. > _______________________________________________ > 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.

I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook something up to it and see if there is anything on 2 or 3, no? > On Nov 30, 2017, at 7:35 PM, Jerry Hancock <jerry@hanler.com> wrote: > > I see a jack labeled JT1. It has about 8 pins I remember. I wonder... > > >> On Nov 30, 2017, at 7:11 PM, Mark Sims <holrum@hotmail.com> wrote: >> >> A lot Rb's from that era have TTL level serial interfaces that can drive most RS-232 ports directly. The PRS-10, SRO100, and LPFRS are examples. >> _______________________________________________ >> 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. > > _______________________________________________ > 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.