[time-nuts] Wenzel VHF PLO Oscillators Off Frequency

Bob Camp kb8tq at n1k.org
Sun Nov 12 11:22:08 EST 2017


As a guess - the oven circuit has stopped working. Next step
would be to tear it open and trace out the schematic. After that
make reasonable guesses for any parts that are poorly labeled. 

Much of what shows up on eBay has been through the ringer in
China. A high percentage the OCXO's I get on eBay show up with 
issues as a result. There is no way to be sure this or that part was
ok before it came out of the gear it was in. It’s always a gamble.


> On Nov 12, 2017, at 10:41 AM, Mark Goldberg <marklgoldberg at gmail.com> wrote:
> I have obtained a couple 80 MHz Wenzel Oscillators P/N 500-16423A. They are
> proprietary but similar to the VHF PLO and 501-14057 Oscillators. I want to
> use this to replace the internal oscillator in my Perseus SDR, for better
> accuracy and maybe better phase noise. Both of these are way off in
> frequency, about 4-5 kHz high from the ideal 80 MHz, and drift around
> hundreds of Hz. I believe they are broken in some way. The PLL lock signal
> toggles when I put an input into the 10 MHz reference, but the output
> frequency is not affected.
> Wenzel has answered some of my questions, but can't get specific as these
> are proprietary to a customer.
> Any experts on these oscillators out there?
> Thanks,
> Mark
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