[Boatanchors] National Crystal Calibrator for the HRO 50T1

[manualman at juno.com]

I built an outboard 100 KHz, 50 KHz, and 25 KHz calibrator for one of my
NCX-3's back in the 90's using one of those computer type crystals I
believe from Mouser. When I sold the rig with the calibrator back in 2014
or 2015, the calibrator crystal was still working fine.

Pete, wa2cwa

On Mon, 20 Aug 2018 19:46:58 -0500 Rob Atkinson <ranchorobbo at gmail.com>
writes:
> I agree with that but you also want a decent rock and not some dinky
> micro crystal.
> 
> 73
> Rob
> K5UJ
> 
> >
> > My feeling is if you're going to write a construction article for 
> a
> > magazine, try to make sure you use parts that are readily 
> available and
> > not something you found in the parts box where you've been 
> accumulating
> > parts for the last 60 years.