12-08-2014, 10:59 PM
For a rotary switch that is handling R.F. currents, ideally, you need a switch with ceramic wafers. But from where such items are available these days, I regret to say that I have no idea! 
Faced with a similar problem of R.F. switching in the past, I used miniature co-ax relays.
Al.
Faced with a similar problem of R.F. switching in the past, I used miniature co-ax relays.Al.
