Interesting. There may be a use for the OCXO units in the old Lucent boxes with the insensitive GPS receivers.
The OCXO is an Efratom part # 023005-001. Some of those boxes were never used. Google can't find the specifications for the XO. I expect they're not as good as a functioning 10811, but they're better than a bad one if you've become attached to your Z38xx. Alternatively, you could try an LPRO-101 Rubidium with EFC if you don't need the short term stability of a crystal. The EFC loop tuning constants might be different, though. Either Lucent box can be shipped (in the USA) in a USPS large Fixed Rate Priority Mail box for $18. Bill Hawkins -----Original Message----- From: time-nuts [mailto:[email protected]] On Behalf Of Bob Benward Sent: Saturday, September 05, 2015 1:19 PM To: Time Nuts Subject: [time-nuts] Z380XA The saga of the aging 10811 Hi All, I would like to convey the saga of my Z3801A and my Z3805A. I purchased a Z3801A a few years ago at the Dayton Hamfest. I got it running and a few months later the unit lost it's GPS lock. I did some trouble shooting and finally realized the unit ran out of EFC range. I opened the double oven 10811 and retuned the unit to the lower end. The unit ran for another year or so, and then the oscillator died. The frequency was close, but the amplitude dropped too low for the circuitry to lock on to. I put the Z3801A aside and purchased a Z3805A from China (I think from Yixunhk). -----%<----- On another tangent, I tried hooking up a Morion to the Z3805A. I used an inverting amplifier for the EFC since the coefficient is positive and on the 10811 is negative. I never achieved good control before the Morion itself died. I will probably continue working on marrying a new OCXO to the Z380XA control board. I need an alternate source for the OCXO without depending on used double oven 10811s. _______________________________________________ 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.
