[Elecraft] Remote K2

[Jack Brindle]

Larry;

Even this uses TCP/IP, something John thinks he should do without.

On Oct 11, 2004, at 6:54 AM, Larry Phipps wrote:

> John, the only way to do what you want and have the control software  
> at home is to use a serial device server. There is info on this on my  
> website as Richard mentioned.
>
> Serial device servers can either be hardware devices or software run  
> on a remote computer. I use the hardware approach. I got the best  
> results with an ISDN modem, but I have tested dialup as well.  
> Lantronix makes a line of devices that work well. I have several  
> models which control from one to 8 devices. The remote site needs a  
> modem with ethernet connection, like the 3COM OfficeConnect LanModem  
> that I used. The rig plugs into the lantronix using a serial cable...  
> the Lantronix plugs into the 3COM using an ethernet lan cable.
>
> The serial server translates the serail port data on the rig into tcp  
> port data which can be accessed remotely. At home, a program called a  
> com port redirector sets up a virtual com port which any program can  
> access as though it were a real com port. Lantronix offers a free  
> redirector program.
>
> I haven't tried N4PY's software with this, but it works fine with  
> TRX-Manager.
>
> The only way QSK is going to work is if you key an audio oscillator at  
> home and send the audio to the remote site to key the rig. I did this  
> with ISDN for cw, phone and PSK with good results. A standard pots  
> phone line can't be used for cw... but you could probably condition it  
> at the remote site to clean it up with filtering... or make a tone  
> actuated fast relay circuit with a simple detector or better still a  
> PLL... even then, you will get some latency since a phone line has up  
> to 50ms or so of latency due to a number of factors depending on the  
> distance.


- Jack Brindle, WA4FIB
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