John Miles wrote: > I've upgraded the graph on the http://www.ke5fx.com/tbolt.htm page to show > the performance of my Thunderbolt from the TAPR group buy (in orange) next > to the traces for my older unit before and after the 10811 upgrade. > > There is no upside to tinkering with the OCXO on the TAPR units, unless you > have something that can beat a 10811. You could replace it with a rubidium > source and get better short-term stability, but I don't think swapping one > quartz OCXO for another would be a useful thing to do. > > -- john, KE5FX > John
What power supply did the TAPR Thunderbolt use? Have you considered using a variant of the Wenzel supply filters to cleanup the spurs in the 1-10kHz region. This is trivial with the low current -12V supply but would require some design effort for the +12V and +5V supplies. Using a more modern opamp (simplifies biasing) to augment the performance of such a filter for the higher current supplies would be worthwhile. Even dropping the spur level by 20dB is probably worthwhile. Bruce _______________________________________________ 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.
