[GreenKeys] Low-level and High-level TTY conversion

[Duncan Brown]

Nick,

The "Tempest" Dovetron MPC-1000 units had a "low level signaling" aka 
"Mil" interface  and no high level loop supply.  The levels where 
similar to RS-232 and would probably work with these low level M28s. 
(Probably what the Tempest Dovetrons where designed to work with.)

But these M28s probably have stock selector magnets, so there may be a 
low to high converter in the M28 that could just be bypassed.

Duncan
K2OEQ



On 30-Apr-13 17:11, Nick England wrote:
> Hi gang - I've gotten email from a volunteer submarine restorer who
> has what he says are 28KSR and 28RO with low-level signaling (+/- 6vdc
> polar). They want to use these units with the ham gear in their radio
> room.
>
> Is there a ham TU compatible with Low-level signalling ? Would just an
> RS-232 interface work or are they all unipolar? Would he have to build
> high-low level converters?
> Thanks in advance for your help.
> Nick
> www.navy-radio.com
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