[Elecraft] Remote KAT500

Rick WA6NHC wa6nhc at gmail.com
Wed Dec 30 15:20:25 EST 2015


BUT it should be done with a fully compliant serial device, using the 
full RS-232 voltages (+/- 12V, some laptops 'cheat' using lower or not 
negative voltages) in order to extend that far.  Beyond 100' I would 
expect that the bit rate would have to come down too, but I haven't 
tested that.  I would also suggest a full 9 wire PLUS shield cable, 
bonding the shield at both ends to the device/computer chassis via the 
connector housing.  You may need some ferrite too, to be determined.

HNY,
Rick NHC

On 12/30/2015 11:57 AM, Cliff Frescura wrote:
> 8 ft is not true for rs-232.  Depends on type of cable and baud rate.  50ft is generally fine and can go up to hundreds of feet.  Maybe you are thinking about usb.
>
> 73,
>
> Cliff K3LL
>
> -------- Original message --------From: Mike va3mw <va3mw at portcredit.net> Date:12/30/2015  11:32 AM  (GMT-08:00) To: Va3ied <Va3ied at gmail.com> Cc: elecraft at mailman.qth.net Subject: Re: [Elecraft]
>
> Remote KAT500 While the spec for serial is about 8ft, I run it much further in professional sports timing.
>
> Give it a try and see if it works. If you can keep the baud rate down, that will help.
>
> To really do it correctly, you will want to run rs232 to rs485 converters and that will certainly solve your problem.  Www.rs485.com has the bits you need.  You can send serial like this thousands of meters.  We do this all the time.
>
> It isn't as complicated as it sounds.
>
> Mike va3mw
>
>
>
>> On Dec 30, 2015, at 9:47 AM, Va3ied <Va3ied at gmail.com> wrote:
>>
>> My tower and garden shed are about 150 feet away. I have LMR400 buried inside
>> some PEX pipe. Would like to use the KAT500 inside the shed...not sure how
>> well a serial connection that distance would work!
>> scott va3ied
>>
>>
>>
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