[GreenKeys] Kleinschmidt TT-4A UPDATE

[Duncan Brown]

Lar,

All  the Kleinschmidts had a switch or plug that made it very easy to 
switch from 20 ma loop (VF) to 60 ma loop (DC).  Typical modem for 
wireline communications was the TH-5 (tubes) and the TH-22 (solid 
state).  20 ma loop was also used with crypto equipment and "radio 
modems" (FSK converters).

Duncan


On 07-Jul-12 10:16, Larry Tighe wrote:
> What is the switch about that is labeled Voice Line and D.C. Line.....it
> "infers" a modem someplace?????
>
> lar
>
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