Startup circuit looks like a bad op amp used as a comparator. U1 section a. This is a LM 158. I have a LM 148 on hand suspect they are different in temperature quality. So will look it up and see. This is a common op amp so if the 148 does not work for some reason any numbers of more modern ones will. Accept one issue its a T08 can. What pin was 8? ;-) Regards
On Sun, Feb 13, 2011 at 1:24 PM, Magnus Danielson < [email protected]> wrote: > Dear Paul, > > > On 13/02/11 18:50, paul swed wrote: > >> Magnus it indeed does look very good. >> >> I have re-assembled the various boards and the system locked up as normal >> after the warm up period. I do indeed have a failure in the lamp control >> startup crkt. >> > > My R&S does not have a startup circuit, so I can't help on that particular > detail. I'm sure you will debug it yourself. > > > The reference after warm up and adjusting the c field is down in the >> 1x10-11 >> area. Anyhow I adjusted the c field and the systems not fully assembled >> nor >> has it really been stabilized long enough. Was simply curious so I do not >> think this is really a very accurate assessment. Especially since this is >> time-nuts territory. >> > > At least it proves that you are up and running at least, modulus quirks. > > > So next steps is to let the unit cook in or maybe I will further assemble >> it >> and troubleshoot the startup crkt. Add the unlock counter. (A pedometer >> and >> opto coupler) and let the system run for a long while perhaps a week or so >> to see what really happens. >> > > Sounds like a plan. > > > Thanks for your guidance and help Magnus. Who would have thought there was >> a >> recovery technique for FRS-c RB references. >> > > Happy to help. Happy to learn of your progress! Happy to hear I contribute. > > > Cheers, > Magnus > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
