Is any ham here who knows this type of tube, 12 pins? A pair is sitting in final HyGain 3750 transceiver. Suppose it is a sweep tube ? Any replacement ? Uwe, DL9NC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com