[GreenKeys] 6005 TUBE KEYER...

[Bob Camp]

Hi

Well if this was an early attempt at making a TTY Tempest compliant 
that would explain a lot. Certainly the skintight 28 is 100% military 
right down to the crate it came in. I suspect that the other machine 
may have started out life on a MARS circuit.  For that matter the 
manuals I have been using are the ones that came in the crate with the 
skintight. I have some civilian manuals in the basement. It might be 
interesting to compare them .....

The other thing it would explain is the cap slung across the magnets. 
Teletype always seemed to avoid doing that since it increased the 
distortion on the circuit. Apparently they traded off distortion for a 
little less radiated signal.

	Thanks!

		Bob Camp
		KB8TQ


On May 26, 2004, at 12:42 AM, zeke wrote:

>
>
> 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.
>
>
> _______________________________________________
> GreenKeys mailing list
> GreenKeys at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/greenkeys
>