[GreenKeys] ASR33 modem

[Jim Haynes]

On Thu, 5 Aug 2010, Nico de Jong wrote:

> 2 and 7 are brought out on a jackstik. This is to be connected to a current
> source of 20 mA, e.g. 160VDC and a resistor of 8K (10W).
>
However note that in the 33/35 line there is no inductance directly in
the signal line, so whatever low voltage will give you 20 mA is OK.  You
don't need the high voltage and series resistor like you do when you are
driving a selector magnet directly.