Hi If you are running a cheap switcher, you can have a *lot* of crud. 78L08's aren't very good at rejecting high frequency "stuff".
Bob On Jun 27, 2013, at 11:27 PM, Arthur Dent <[email protected]> wrote: >> The OCXO in the TBolt has a linear controller. It drops back to about >> 150 to 250 ma on the +12 line after warmup. It's been at least 40 >> years since I saw an on/off oven control in production …. >> >> Remember that the +12 feeds the oscillator circuit. The more crud on >> the 12 volts, the worse the phase noise of the output. A linear >> regulator is a good idea. > > Note that the +12 for the oscillator goes through a 1 ohm resistor > to a linear SO-8 8L08A regulator to supply +8 to the oscillator > inside the OXCO case. There is also some bypassing. I had posted > some photos of the innards some time ago. > > -Arthur > _______________________________________________ > 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.
