Re: T/R Switching
w5jhjerry <jerry@...>
Hi Jim,
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Phil Salas, AD5X, wrote a QST article about a boat anchor T/R switch. He has a copy on his web site. It is here: <http://www.ad5x.com/images/Articles/QSKBArevA.pdf> One of the problems I see with his design is that he uses 2 relays. The first relay follows your keying or keyer. He uses this relay to mute the receiver and key the transmitter. A problem may occur because the relay will switch with the keyer and the relay will unmute the receiver before the transmitter signal has decayed. If you added a second relay to his design one which would be in parallel with the antenna relay, it would probably work fine. The additional relay would be used to mute the receiver. His design will handle up to 100 watts or so. Jerry W5JH "building something without experimenting is just solder practice"
--- In 4sqrp@yahoogroups.com, "Jim, ND9M / VQ9JC" wrote:
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