[Boatanchors] Testing a crystal

[Ian Wilson]

I would aim at keeping the power dissipated in the crystal at or below 10mW.
If the crystal is looking into something like a 50 ohm load then if you
keep the
drive voltage less than 1v or so then this should be safe.

Note that the Q of the crystal is so high that you will not be able to
'land' exactly
on it unless you are using a digital signal generator (and you may have to
watch
the scope trace very closely to see the blip).

73, ian K3IMW

On Wed, Jul 4, 2018 at 7:32 PM, Tom B <tbryan at nova.org> wrote:

> Hello All,
>
> I am working on a set that may have a bad crystal.   This is small HC18
> or HC49 size crystal that is cut for 73.35 MHz.    I plan to test the
> crystal by connecting a signal generator to one side and watching the
> output on the scope and look for resonance. My question is; how much power
> can I run into the crystal without destroying it?
>
> Tom Bryan
> N3AJA
>
>
>
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