C12 and C15 on the support board are for peaking the multiplier/amplifier
for the external standard input. The unit accepts 1MHz, 5MHz or 10MHz for
the external reference frequency. The capacitors tune the external input to
10MHz for the counter to use as the reference.
Cheers,
Dave M
-radio.com/manuals/urq10a-man-0967-170-3010-6609.pdf
Seems to be pretty complete, with schematics, maintenance and calibration.
Wish I had a URQ-10A; they were pretty good instruments in their day.
Cheers,
Dave M
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, but not modified (yet). Your pods seem to
be good replacements for the line taps... Do you plan to publish the details
of your pods (schematics & PCB design)? I might be tempted to build a few
for my own use.
Thanks for posting your project. Nice work.
Dave M
Julien Goodwin w
.
Philips always had a high level of engineering excellence.
cheers,
Neville Michie
Your clock's crystal is more likely 4,194304 Mhz, which can be divided down
to 1Hz, which is used by your clock to keep time to the second.
Dave M
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