[GreenKeys] Fake TTY/crypto equipment

[Nick England]

Thanks for the replies. I have heard from a few people who participated in
scrapping KW-7 units long ago. The circuit cards were returned to NSA and
the cabinets went to the dump - man I wish I had one of those cabinets
today! I've also been checking Craigslist in Pyongyang, Tehran, and Hanoi
but no luck......

I've started a page with photos and a few drawings that may be helpful to a
re-creation project.
https://www.navy-radio.com/crypto/kw7-info.htm

Greenkeyer John Hargett has started doing some reverse engineering from
photos to Autocad.

I'll see if I can talk someone into making some more measurements. A laser
scan would be fantastic, but I'm not sure about how to get that to happen
at the museums that have one of these.

The manual shows an early style KW-7 without a bulge in the patch cord
cover. This early style KW-7 is 11-9/32 inches high, 15-21/64 inches wide,
14-13/16 inches deep and weighs 74.0 pounds
Yours in teletypery,
Nick England K4NYW
www.navy-radio.com


On Wed, Jun 30, 2021 at 3:24 PM Nick England <navy.radio at gmail.com> wrote:

> I'd like to create a fake KW-7 crypto unit - these units
> encrypted/decrypted teletype signals. I need a fake one because they don't
> ever show up on eBay.
> Ha!
> http://jproc.ca/crypto/kw7.html
> https://www.cryptomuseum.com/crypto/usa/kw7/index.htm
>
> I'm only concerned about the external appearance, not the internals.
> Unfortunately it isn't just a straight-sided box. As you can see, the card
> reader (or plugboard) cover is bulbous. There are three "feet" along the
> front edge.The top is also an oddly shaped piece. The rear is also an oddly
> shaped casting but I probably wouldn't worry about it.
> https://www.cryptomuseum.com/crypto/usa/kw7/img/301798/127/full.jpg
>
> A simple rack mount was just a standard sliding rack shelf like in this
> KWX-11 rack:
> https://www.navy-radio.com/commsta/stockton/stockton-1307-03.JPG
>
> There was also a more complex slide-out-and-tilt mount KWF-1
> https://www.navy-radio.com/ships/images/cv66-rcvr-1982.jpg
>
> Have you seen the props in a furniture store that look like a TV or stereo
> but are just painted vacuuformed plastic? That's what might work and then
> I'd add some real switches and indicator lamps. I'd have to make a
> wooden/foam mock-up to use as a mold.
>
> Is this too crazy? Most importantly is there a better way to do this?
> Just 3D print a plugboard/card-reader cover and mount it on sheet metal?
>
> If it is possible, I'd like to make more to donate to museum ships, etc.
> that just have empty rack spaces where crypto equipment used to be.
>
> All suggestions and ideas are welcome including "just lie down until the
> feeling goes away".....
>
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
>
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