If you can't read the one from the AL-811H.PDF on the Ameritron site, look at Fig. 5-13 on page 302 of the RCA TT-5 book. Jim N6OTQ -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com