[time-nuts] time-nuts Digest, Vol 188, Issue 22 Re. Pi

[Bob kb8tq]

Hi

Even things like 1N4001’s can be used as varicap diodes ….

Bob

> On Mar 14, 2020, at 4:08 AM, Andre <Andre at Lanoe.net> wrote:
> 
> Hi, what about using an SDR to micro adjust the 19.2 MHz crystal?
> 
> I found that replacing the input capacitor (normally 18-27pF) with a reversed blue SMD LED seems to help.
> Simply pick an LED with the desired reverse capacitance and test.
> Also feasible: add a 10pF C0G as well if the frequency is too far off to trim in this way.
> https://www.newark.com/capacitor-types-and-performance
> 
> Note that most blue LEDs are light sensitive to UV so plan accordingly.
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.