When I was a teenager, 61 years ago, I saw a U.S. Navy manual with a photo
of a Mon-Key.  It was a WWII era manual.  At the top and botomof the pare
was printed "Confidential".  Evidently the keyer was important enough to
warrant being classified hardware.

I had a teen buddy who had one and we used it to work SS in 1958.

73,

Dave, K4TO

On Tue, Mar 6, 2018 at 3:40 PM, Chuck Guenther <charles9...@att.net> wrote:

> I used a HA-1 keyer during the early 1960's.  However, it was not the
> first successful commercial electronic keyer!
>
> It was my third keyer.  My first keyer was the "Mon Key," which did not
> have self-completing code elements, and my second was a Eldico, which was
> self-completing.  Both these earlier keyers had built in paddles.
>
> 73,  Chuck  NI0C
>
>
> On 3/03/2018, Kent Trimble wrote:
>
> I did a Show-N-Tell with our club’s CW class last Saturday using my
> 46-year old Hallicrafters T.O. Keyer so they could operate the first
> successful commercial electronic keyer, and to underscore how viable
> vintage tube gear still can be."
>
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