Is this an EIMAC tube or RCA? Can not find this nubmber in EIMAC catalogs I have. Does it have descriptive number or EIA 4 digit number? Thanks de Arne N7KA -- 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