[Milsurplus] A New Concept: Virtual Spectrum

[William Donzelli]

> This "insulator on top" would be unusual.  It might have predated
> the conventional 50 ohm feed to the "underground" (coax running in covered
> trenches) out to where the RF was applied to the HV line by use of
> impedance matching.... (aka: antenna tuners) where it was transformed
> to the approximate 400-600 ohms of the HV line.

The information I have is in a 1930s era industry "yearbook". I'll try 
and find it (ha ha) and maybe scan the pictures.

> Westinghouse and GE both were the main suppliers of Carrier Current gear.
> Westinghouse gear always looked neater to me since it was mainly painted
> black crackle, just like their MIL gear.   GE used mainly flat 
> grey.   Perhaps GE
> never mastered black crackle painting.... witness their TCK "flakers."

GE. Good Enough?

> I can't say that some Utility did not use tone keying or even FSK to run a
> teletype system, but I know of none and never saw any manufacturer's
> advertising promoting it.

It is kind of a dumb idea, as using convetional land lines makes much 
more sense. However, you know how enginers can get... 
 
William Donzelli
aw288@osfn.org