开云体育

Re: HP200CD oscillator


 

开云体育

Sometimes the plates are bent during initial calibration to linearize the? scale or hit calibration points within the range.? Some people "straighten them out" because "someone" had to bend things out of position.?

Unless you specifically know that someone has re-bent the plates on the capacitors, I'd suggest leaving them alone.? The plates may be bent to make it accurate.

All the above is invalid if someone has made adjustments with a small hammer.

Harvey


On 10/26/2021 10:00 PM, Jeremy Nichols wrote:

There’s really no reason to check the capacitance of the frequency tuning capacitors. If some of the plates are significantly bent (but are not touching), the oscillator will still work but will be inaccurate. With power off, you should be able to check across the capacitor with an ohmmeter and get infinite resistance (an open circuit).?



On Tue, Oct 26, 2021 at 9:40 PM Richard Merifield <coitboy2000@...> wrote:
OK, thanks

They look clear of debris. Is there a way to check their capacitance or resistance easily ? I have an LCR meter.

Regards
--
Jeremy Nichols
6.

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