[GreenKeys] RS-232 to 60mA current loop conversion for Model 15 TTY?

[John Nagle]

     What's considered good present technology for converting
RS-232 levels to 60mA current loop for a Model 15?  Most
of the current loop converters available are for 20mA loops,
and even the ones that are rated for 60mA aren't intended
to handle a 120VDC loop or the inductive kickback from a
Model 15 selector electromagnet.

     What about DC-DC solid state relays?  The HDD-6V15
("http://www.power-io.com/products/hdd.htm") ought to
work, since it can handle 600VDC at 15A with a switching
time of 25 us, but it's overkill at 15A and overpriced at $93.

				John Nagle