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. So I pulled the fet gate Q2 to ground through a 1 K ohm resistor setting the lamp to 24 volts. After ignition just let it float taking the lamp voltage to 17 Volts.
The lamp, after ignition is 10 volts when its oven is still cool and has dropped in brightness. This is normal for the warm up period. Still at 8.5044 volts after the lamp oven gets to 177 degrees. VCO correction voltage is 6.023v. As I recall, this is mid range on the voltage. 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. By the way I purchased the heat gun from a supplier thats on amazon.com. Its the NTE or ECG HG300d for $19.95. Two heat ranges 250 degree c and 350 degree c. Small and easy to handle. I used the low range and adjusted the height of the lamp to the heat gun tip approximately 4" distance to get 300 degrees F. 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. Thanks for your guidance and help Magnus. Who would have thought there was a recovery technique for FRS-c RB references. Regards Paul WB8TSL On Sun, Feb 13, 2011 at 8:12 AM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: > Paul, > > > On 13/02/11 04:27, paul swed wrote: > >> Well pretty good news >> The lamp voltage went from 1.83 volts a dead bulb to* 8.9 volts a new >> bulb*. >> By adjusting the oscillator I can get to 9.6 volts but I know the the >> oscillator will not start correctly at 82 Mhz its happy at 92 Mhz. >> > > This is good news, for the level of re-assembly you where at. > The lamp is in the ball-park now... > > > Cheers, > Magnus > > _______________________________________________ > 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.