Rich said: >EUR it doen't affect R, it prevents the counter EMF from zapping the >ohm-meter. I've never zapped the meter, but I have zapped me with that back emf! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com