The simplest way is to get a DPDT knife switch. Look in the web and I am sure you can find one.
73 de Price W0RI I am planning to put in a DPDT switch (or relay) to allow me to easily switch from using my 80m dipole as a vertical (T-top) antenna on 160m: http://www.ae5x.com/docs/antennas/160mT.jpg The dipole is fed with 450-ohm ladder line and used 10-80m in that configuration so there is a high SWR on the line. I sometimes use a kw output. I know that T/R switches inside amps are fairly small in physical size, however they are designed to operate into a fairly low SWR load. I have no idea of what rating of a DPDT switch I would need (per the diagram) in my application - perhaps I'm making a bigger deal of something that isn't so critical.? John AE5X http://www.ae5x.com/blog _________________ Topband Reflector _________________ Topband Reflector