?Hi Alan,
I measured the voltage on the HC6 socket and found negative .1 volts on one side and zero on the other. All the sockets measure the same negative voltage in the instrument. This obviously isn’t an over voltage issue for the PR2 and maybe the negative voltage killed the one I configured for the frequency I needed. Like I said, it appeared to work for a minute or so, then stopped.
I’m not sure what I can do here other than pull filament voltage (tube equipment) rectify it and then put a 5 volt regulator on the rectified voltage. I would do that only on the three crystals I planned to use the PR2. I’ve got plenty of room under the chassis for the extra components but the time needed to get the 5v regulator (I don’t know if I have one handy) just adds time to my solution and in hindsight I may have been better off just ordering the crystals.
Thanks,
Tom N5AMA
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On Apr 2, 2025, at 7:12?PM, Tom Smith <n5ama@...> wrote:
?Thanks Alan, I’ll measure the xtal socket and see what’s on each pin. I’ll have to be careful to put the voltage pin on a socket with 5v regulated voltage.
73 Tom
On Apr 2, 2025, at 1:50?PM, Alan G4ZFQ via groups.io <alan4alan@...> wrote:
?On 02/04/2025 14:59, cct314159 via groups.io wrote:
- Even though they are "rated" for "12 volts" *don't even think about running one at that voltage:* I'd avoid going above 10.0 volts.
Yes, that reminds me. I tested with 12 volts and it certainly got a lot hotter than I expected.
The ones I use are fed from 5 volts and keep cool.
73 Alan G4ZFQ
