Hi Bob; I have mentioned a couple things recently that I thought would be common knowledge in the Time-Nuts community. The first was that 5MHz was a sweet spot for quartz oscillators such that doubling 5MHz would generally out perform a 10 MHz quartz oscillator. The other was the "migration" between quartz and the plating/deposition metal over extended periods of time causing a slight decrease in oscillator performance. These both seemed common knowledge to people I work with that are far more knowledgeable then myself. I am often on the steep part of the learning curve an don't always have time for a full explanations. I will inquire about how factual I was, and if I understood correctly I will pass on an explanation of the physics behind these beliefs. Or bow my head in shame.
Tom > From: [email protected] > Date: Thu, 29 Aug 2013 18:33:21 -0400 > To: [email protected] > Subject: Re: [time-nuts] B.V.A. 8600 for sale > > Hi > > On Aug 29, 2013, at 1:20 PM, Tom Knox <[email protected]> wrote: > > > I could be wrong but I thought when I priced these for work the BVA 8600 AT > > cut was substantially cheaper then that. I think the $11,000 is more in > > line with a BVA 8607 SC cut with an option. But from my point of view the > > close in Phase Noise on this particular oscillator is what dictates it's > > value. These BVA 8600's typically range from 110 to better then 120 dB @ > > 1Hz which is a big difference. If this BVA is at the low phase noise end of > > the range it could be a real bargain at $3000. > > Another option in the $3000 range is the Wenzel Blue Top ULPN oscillators. > > It may not match a good BVA inside 1Hz but will have at least a 20dB better > > noise floor from about 10KHz out. The other plus with a BVA is the the > > Quartz is capacitive coupled where most other oscillators have metal > > deposited directly on the Quartz which will interact over time > > I know of no such interaction in modern quartz resonators - what are you > referring to here? Your Wentzel part likely has either an aluminum electrode > or a chrome / gold electrode system on it. Neither one "interacts" with > quartz. > > Bob > > > and potentially diminish performance. As Tom and other explained prices go > > up exponentially for ULPN oscillators. > > Thomas Knox > > > > > > > >> Date: Thu, 29 Aug 2013 12:53:47 -0400 > >> From: [email protected] > >> To: [email protected] > >> Subject: Re: [time-nuts] B.V.A. 8600 for sale > >> > >> OK but like a new car the value drops 50% off the lot. > >> Anyway you slice it as nice as this might be I will stick with the $100 and > >> less 10544/1081s 105s and sulzers. I may be a time-nut. But I am not > >> time-Nutz. > >> Perhaps for the lab that need it that is a darned good price. > >> Regards > >> Paul > >> WB8TSL/1 > >> > >> > >> On Thu, Aug 29, 2013 at 11:39 AM, Said Jackson <[email protected]> wrote: > >> > >>> Yup, I heard price goes up from there... > >>> > >>> Sent From iPhone > >>> > >>> On Aug 29, 2013, at 8:37, "Poul-Henning Kamp" <[email protected]> wrote: > >>> > >>>> In message <[email protected]>, Said Jackson > >>> writes: > >>>> > >>>>> These are about $11,000 or so new if I am not mistaken. > >>>> > >>>> Depends what options it has... > >>>> > >>>> -- > >>>> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > >>>> [email protected] | TCP/IP since RFC 956 > >>>> FreeBSD committer | BSD since 4.3-tahoe > >>>> Never attribute to malice what can adequately be explained by > >>> incompetence. > >>> _______________________________________________ > >>> 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. > > > > _______________________________________________ > > 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. _______________________________________________ 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.
