Are yu sure that it's an OXCO? According to the manual that I have, the
only option for the 5300B counter unit was option 001, which added a TXCO.
The manual doesn't give any data on the Option 001 oscillator, so can't
confirm that your oscillator is TXCO or OXCO. If it's a TXCO, it won't get
very warm, of course, and there won't be any oven control circuitry.
Is there an HP part number on the oscillator module?
Cheers,
Dave M.
Burt I. Weiner wrote:
The closest it will adjust is -2.5 Hz of 10.0000
MHz. This unit differs from the one in the
manual in that it has a Microsonics OCXO with the
adjustment on the side of the module. The oven
does not feel warm but is written on the side is:
"Adjust at 25 Deg C", which is about 77 degrees
F. The schematic associated with the oven is
missing from the schematic. I suspect that the
oven is either shot or not getting power. The
unit will not power up with the boards separated
so I'm going to have to spend some time hanging
wires out the side to make measurements. Does
anyone know of a schematic showing the
Microsonics module and the associated circuitry
for oven control? Not sure if it's worth the
effort, but it would be a shame to toss it - that's against my nature.
Burt, K6OQK
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