Thanks for the tips Magnus. I will open the unit and with gentle taps - see what causes the problem.
Yes, I know that the frequency is programmable. The unit came from "flyingbest" on Ebay and I see that three wires are connected from the 9 pin D to the inside where the Tx/Rx connector. The 10Mhz output seems to have been added by the vendor, I see a crude hole drilled and burrs still intact and a SMA fixed there. I wonder how the original unit had an output if there was no connector! At 13-02-10, you wrote: >Raj, > >Raj wrote: >>Hi Stan, >> I will explore this issue tomorrow, 20:00 here now. I was just going >> through a boyish thrill of fiddling with a Sony ICF-S10Mk2 and the amazing >> numbers of AM stations it picks up.. maybe it can be used at 60Khz.. for 10$ >> it worth it !! >> How about keeping he Rb cover open ? I measured the lamp housing >>at 110C and the rest at 60-70C. > >These are the expected values and heating is applied to achieve it. Pulling >the cover will force more power to be pushed into it to compensate for the >cooling, and fast-changes in temperature will be less effectively compensated. > >>I dont intend to keep my units on all the time but I dont feel good about >>anything running hot! > >No, you *WANT* it to run at those temperatures for a number of reasons. That >is what the Rubidium physical package needs for proper operations. >So pulling the lid of (which is magnetic shielding) to cool it (the regulated >temperature) is defeating the intended operation. Rather, make sure to not >cool it too much. > >>Maybe a small slow fan might help. I am fascinated by the blinking light >>inside at 1Hz and thats >>not available on the DB connector. I did add a reverse polarity protection by >>soldering a 2A diode >>between the center pin of the regulator and the +15 pin. I wish I can find a >>schematic and what >>else I can do with this gizmo! > >You can program the output frequency... but I assume you know that. > >Cheers, >Magnus -- Raj, VU2ZAP Bangalore, India. _______________________________________________ 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.
