Thanks to everyone who answered my query on this subject. It seems that I may well be able to push my GS35b's a little further than I was planning to - up to 4.5Kv or so instead of 3Kv. Thanks again all, Phil Smeaton G0HSS -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com