TSEC/HN-6(D-3) FACSIMILE TERMINAL EQUIPMENT
Circa: 9-16-57

Designator analysis:

TSEC/  a complete piece of equipment.
H ancillary to crypto gear.
N designates  signal conversion.
It is unclassified.
Known variants: D-1 and D-3

If anyone can provide additional info, please contact : jerry,proc@sympatico.ca

HN-6(D-1) photo courtesy National Cryptologic Museum. Click on image to enlarge.

---

Contributors and Credits:

1) NCM
2) Nick England <navy.radio(at)gmail.com>
 

Feb 21/15