Hi The conjecture has always been that all of the 5334B’s with 10544’s were a field swap out. Why would you do such a thing? That’s never been explained. One *might* wonder if the fact that the 5334B sells for about the price of a 10811 and few would notice a (lower value) 10544 is involved ….
Bob > On Apr 24, 2016, at 12:28 AM, Richard (Rick) Karlquist > <[email protected]> wrote: > > > > On 4/23/2016 6:27 PM, Bob Camp wrote: >> Hi >> >> The 5334 spanned the era when the 10811 was being introduced. I’ve never been >> able to sort out exactly *what* was in each version as shipped and what got >> swapped >> around by various techs over the years. I always *thought* the 10811 was >> standard for the 5334B version. There are a lot of examples running around >> with earlier 10544 OCXO’s ... >> >> If only the project manager for the 5334B was here on the list …. :) >> > > Well, here I am :-). The 5334B standard oscillator (not the OCXO) was > the same as the 5334A standard oscillator. Which was IIRC an > inexpensive crystal with an oscillator circuit using ECL line > receivers. I simply continued using it because I didn't have time to > redesign everything. An ECL line receiver is not a low phase noise > design and has an adverse contribution to tempco. OTOH, it is fool > proof. The only optional oscillator ever available from the factory > was the 10811, which was well established by 1987, and the 10544 was > long gone. 10811's are guaranteed to work in any 10544 socket, mainly > because they don't draw any more warmup power than a 47 ohm resistor. > 10811 sockets are not guaranteed to be compatible with 10544 > oscillators. However, they are certainly mechanically compatible. > It's entirely possible that a 10544 might work in a 5334B, but the > factory never shipped such a configuration. Where would they > get 10544's? > > Rick Karlquist N6RK > Project Manager HP 5334B > _______________________________________________ > 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.
