[Boatanchors] National Crystal Calibrator for the HRO 50T1

[Bry Carling]

Greg - we have the fill sized 100 kHz calibrator crystals (and soclkets) available again now. AF4K CRYSTALS


http://af4k.com/crystals.htm


73 - Bry AF4K



________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of Greg Gifford <cleophusa1 at att.net>
Sent: Monday, August 20, 2018 10:40 PM
To: manualman at juno.com; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] National Crystal Calibrator for the HRO 50T1

Hello, and thanks to everyone for their help and suggestions. I may end up having to build one, but I was hoping that someone may know of someone with an original National made unit. There are just too many HRO 50’s and 60’s out there that are missing their calibrators for there not to be a few squirreled away somewhere in somebody’s junk box. Thanks, Greg/KG4MMY

Sent from Mail for Windows 10

From: manualman at juno.com
Sent: Monday, August 20, 2018 7:31 PM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] National Crystal Calibrator for the HRO 50T1

Buy 100 KHz crystal from Mouser for $1.12 each:
watch for wrap around (copy and paste might be better)
https://www.mouser.com/ProductDetail/Epson-Timing/C-2-1000000K-PPBFREE?qs
=sGAEpiMZZMsBj6bBr9Q9acukpafrIaZ1tEf0Rk3SP58%3d

or if that's tooooo expensive for you here's another one from Mouser for
85 cents:
https://www.mouser.com/ProductDetail/ECS/ECS-100-125-13X?qs=sGAEpiMZZMsBj
6bBr9Q9aZy59saLb3yquFq2SKF3u3k%3d

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.


Pete, wa2cwa


On Mon, 20 Aug 2018 18:55:15 -0500 Rob Atkinson <ranchorobbo at gmail.com>
writes:
> I think they are still around, but I am not sure about that 100 kc
> rock.   May be a special order now:
>
> http://www.nelfc.com/index.html
>
> Surplus Sales has new 100 kc crystals for $35 each, but their
> listing
> is sketchy on details.
>
> 73
>
> Rob
> K5UJ
> On Mon, Aug 20, 2018 at 2:27 PM <manualman at juno.com> wrote:
> >
> > As far as I've been able to search, the company mentioned for the
> crystal
> > doesn't exist anymore unless it's now under some other name.
> >
> > Pete, wa2cwa
>

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