On Fri, 08 Apr 2022 03:30:33 -0400, [email protected] wrote: time-nuts Digest, Vol 216, Issue 13
> > Message: 8 > Date: Thu, 7 Apr 2022 16:59:05 -0700 > From: ed breya <[email protected]> > Subject: [time-nuts] Re: Low Phase Noise 10 MHz bench signal source > sought > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset=utf-8; format=flowed > > On 4/7/22 3:09 PM, Joseph Gwinn wrote: > > > > This BTULN OCXO looks very good. While they do mention that it > > contains its own regulator, no numbers are given, so it's hard to > > know what to make of that claim. > > > > As far as I know, every OCXO and most everything else has its own > internal supply and further regulation of some sort, running from the > crude real world sources applied. As long as the supply you give it > meets the specs and other characteristics, stated, it should be just > fine. Making the outside supply part better may or may not make the > thing work better, but maybe it's worth a shot. Could well be, but the lack of a PSRR spec is crippling. > > >> I wouldn't assume battery power - but this is where a phone call helps - > >> they'll be happy to tell you. > > I must say that I've run into the battery-power (or *really* good lab > > power supply) approach, neither which is applicable in non-lab > > applications. I suppose if Wenzel does the packaging, they will > > ensure that full OCXO performance is achieved when powered from the > > usual lab AC power. The box would also shield the power wiring and > > frequency-control input (if any) and associated wiring from passing > > EMI. > > > Relating to power supply filter capacitance multipliers from the > concurrent 1/f noise discussion, are you talking about this kind of deal > maybe? > > <http://www.wenzel.com/documents/finesse.html> It does seem to be a capacitance multiplier of some kind, but it's hard to tell because the circuit diagrams are rendered in black lines on a very dark gray background - it's basically illegible. I've not found a pdf - seems to be web only. Time to call Wenzel, it seems. What people are using for the film capacitance to be multiplied are aluminium-polymer capacitors, with United Chem-com brand being favored for use directly across power rails. Joe Gwinn _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
