[GreenKeys] OT: Teletypes, Telephone & Railroads

[Charles Ring]

I don't remember a hum which I would expect from an unbalanced line, it
was more clicks and random noise. The bandwidth was a lot lower than 3
kc too with distortion.


TELEGRAPHER at att.net wrote:
> Sounds like the used a "single" wire system where as the return was 
> thru the ground.  Noisy ground connections at either or both ends 
> would definitely cause those problems. OR, a 2 wire system that is 
> really unbalanced, probably by left over wire bridges.
>
> Ahhh yes, days of yore!
>
> Larry
> W0OGH
>
>  
>
>     -------------- Original message from Charles Ring
>     <w3nu at roadrunner.com>: --------------
>
>
>     > My first exposure to Teletype was at age 8 or so at the PRR
>     office where
>     > my dad was yardmaster. When they moved from a very old small
>     building to
>     > a newer one down the track, they replaced the 19 with a 28ASR.
>     At some
>     > point after the merger they switched to Friden Flexowriters and
>     iirc
>     > then back to Teletype (?). About the PRR phone system, i
>     remember from
>     > the 60's that the railroad phone lines had really poor sound
>     quality and
>     > noise. Can't complain though as it was good enough for my
>     parents to
>     > meet each other in 1950 by.
>     >
>