What sort of full break-in circuit is the best? Has anyone tried PIN diode switches at the multi KW level of are vacuum relays the only ways to go? 73 Richard G3CWI -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm