[GreenKeys] 6005 TUBE KEYER...

[zeke]

The 6005 keyer was used extensivley in the MI arena as a "low Level" signaling device.

You are right it did produce significantly lower RFI... The 6005 keyer had a signature 

of several hundred feet.  I first saw the 6005 keyer at the Army Signal at Ft. Gordon 

in early 1970 at that time it had already been in the field several years.

All of the circuit daigrams I have left (if they have survived my trunk) are "unclassified"

military documentation.  I can't recall seeing any 6005 keyers in the 

"Civilian"  TTY manuals we used.

late 70 - 71 the 6005 keyer was replaced by a sloid state YESU or LESU (taking up the 

entire base of an RO or KSR and more than half of an ASR base cabinet ) with 

all cabinet and signal cabling shielded.  These units had an RFI signature incapable of 

being  "Seen" outside of something like a 6 foot radius of the cabinet.  the documentation 

for these units were all TTY manuals... Although I did maintain several modified machines

using non TTY documentation.