Rich > You don't need a double oven with the E1938A Maybe the E1938A does not need it, BUT it SURE does helps the average OXCO to keep it at a VERY constant temp when looking at parts in e-12 freq changes.
How about the 10811-60158? I think? that (or some version of it) is what is used in the Z3801A. My testing shows that the ones I have sure need their outer ovens working to get the best performance, even over just small room temp changes. ws *************** ----- Original Message ----- From: "Rick Karlquist" <[email protected]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Wednesday, November 25, 2009 5:18 PM Subject: Re: [time-nuts] Double oven ocxo's was Tbolt reception problems > John Green wrote: >> As to the double oven OCXO, I have 2 I purchased off eBay in the last few >> months. One is a Morion MV89 and the other a UCT 8663. I compared both to >> the Z3801 over several days and was not impressed. They seemed no better >> than a good single oven unit. Of course, I wasn't trying them over a large >> temperature excursion but I expected them to be better than a single oven. > > We demonstrated thermal gains of over 1 million in the E1938A > single oven oscillator. You don't need a double oven. > > Rick Karlquist N6RK > > > > _______________________________________________ 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.
