Trying to make a simple T/R switch with a HH52P relay

[mattsowders1989]

Call me a wishful thinker but it would seem like there would be a certain "point" on the Board that one could solder a coax wire to for receive to an external receiver. Like the point where RF comes in to the receiver portion of a transceiver.

 

[mattsowders1989]

Also, yes this is a solid state transceiver. It is on a vertical antenna as well. The CB its self only puts out about 12 watts pep on AM.

 

[Captain Kilowatt]

CK, were you using coaxial cable in your situation?

I also wonder if the DX60 being a tube type transmitter had anything to do with it working?
something tells me his transceiver is a solid state rig.

I have always been under the impression that the impedance bump caused by adding the relay in to the equation would be a problem.

seeing as how this was posted in the CB modifications section, i am assuming this station will be run with a monoband vertical CB antenna or beam, fed with 50 ohm coax and no tuner in line.

thanks in advance for any more info you can lend on how this could work.
LC

The slight impedance bump is not an issue at HF. Heck even a PL-259 is a non-constant impedance connector and will introduce an impedance bump. I made a remote antenna switch using four of the P&B KHAU17D11 relays and used it with a solidstate 100 watt transceiver and saw no issues with SWR. The relays were mounted in a metal box and I did use short lengths of RG-8m or RG-58 cable for all connections. The Ameritron RCS series of remote coaxial switches use a sealed relay that is PC board mount design and they work fine thru 6m.

 

[mattsowders1989]

Thanks everyone for your help. I got the t/r switch made. Works great. The device I use to key my radio is also used to switch the receiver off. It kills the receiver just very slightly before it keys the radio just to be safe. Thanks guys!!!