On 9/2/2012 9:51 AM, Fred Jensen wrote: > Somehow, we managed to > key the transmitters multiple miles away with no noticeable delay. I > never got to the TX site so I don't know how they did it.
A few years ago I visited both TX and RX sites for KPH, the coast station north of San Francisco, along with W3DQ, K3NA, and W0YK. The sites were something on the order of 20 miles apart, and the connection was an ordinary telephone line, everything analog, so no delay. The two sites could operate simultaneously on as many frequencies as they had operating positions. CW was simply translated to audio tones, a different frequency for each transmitter, and the output of tone decoders was amplified, rectified, and used to drive relays that keyed the TX. The line was (and still is) a dedicated line, so it does not go through the telephone switching network, so the only delay is the speed of light over that 20-30 miles plus the relay pull-in time. I don't recall how they said the operators were monitoring their own keying. K3NA had a new 2nd Class Telegraph license, so he operated a bit and got it endorsed. The rest of us watched. KPH is maintained by volunteers and is available for tours at scheduled times. It's well worth the time. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
