[Elecraft] Long RS232 Runs - RS422

[Michael Walker]

For me at my remote, it is only 100ft, so I am using RS232 for the rotator
and the steppir.

For a big ski race in Kitzbuhel Austria, we pushed RS485 (1/2 duplex) 6000m
at 19200 without an issue.

Mike va3mw


On Thu, Jan 21, 2016 at 3:25 PM, Clay Autery <cautery at montac.com> wrote:

> This one is rated to 1250 meters... with CAT-3 cable (TELCO).  Use
> better cable and proper terminations and you MIGHT be able to extend
> that a bit.  Add an inline amp/repeater, and the distance could be
> extended to... well... a long way...
>
> How far you need to go?
>
> 73,
>
> ______________________
> Clay Autery
>
> On 1/21/2016 12:44 PM, Jim Brown wrote:
> > On Thu,1/21/2016 10:32 AM, Michael Walker wrote:
> >> I wanted to mention that for those that want long RS232 runs for devices
> >> (Steppir, Rotator, Elecraft Amp),
> >
> > It helps to define "long." Distance for RS232 was originally defined
> > in feet. Many years ago, it was redefined in terms of capacitance
> > between conductors. Using cables as common as CAT5, lengths of 200 ft
> > or more are no problem. Simply use one pair per signalling circuit.
> >
> > 73, Jim K9YC
>
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