Rich said: "? What is the pressure drop across the socket, Colin?" I did not measure it. I made the assumption Bill knew what he was talking about and my 4-1000 keeps cool. I suppose I should measure it and will put it on my things to do list. Colin K7FM -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com