[Boatanchors] National Crystal Calibrator for the HRO 50T1

[Howie WA3MCK]

Hi Rob,
Well put. Yes, excellent article. Considering an old Heath crystal
calibrator commands $50 and up and don’t even ask about the plug in
calibrator for the HRO-60!
Howie WA3MCK


On Mon, Aug 20, 2018 at 05:55 Rob Atkinson <ranchorobbo at gmail.com> wrote:

> This may not be of much help, but in the August issue of ER, there's
> an article on how to build and install a homebrew solid state xtal
> calibrator that can be applied to any vintage set, plus a source for
> the 100 kc crystals.  It can be breadboarded, and runs off 12 v. dc
> and the article also tells how to make a small v. doubler power supply
> that runs off the 6 v. filament supply.  It's a pretty useful article.
>
> 73
> Rob
> K5UJ
> On Mon, Aug 20, 2018 at 12:16 AM Greg Gifford <cleophusa1 at att.net> wrote:
> >
> >
> >
> > Hey Guys, anybody out there have a crystal calibrator for an HRO 50T1
> receiver? Thanks, Greg KG4MMY
> >
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