fini Posted February 7, 2003 Share Posted February 7, 2003 Before I power these up, what precautions should I take (i.e. should I bring them up slowly on a variac, as I know nothing of their histories)? They came with an instruction manuals, which seem to clearly describe the test settings and procedure. Then, is there any way (for me) to test accuracy? Erring on the side of caution, I'll wait for an answer before proceeding. I'll check back after I vacuum and mop the floor... fini Quote Link to comment Share on other sites More sharing options...
NOSValves Posted February 7, 2003 Share Posted February 7, 2003 Fini, If you have a variac yes use it !! Start at about 40 VAC for a few hours then 60 and so on until up to full voltage. It sure isn't going to hurt anything ! I've never heard of a 550X is that a Hickok ? As far as accuracy I had my Hickok calibrated by a Professional rebuilder. He goes through and rebuilt it top to bottom and then he calibrates it by the instructions and he also has about a dozen tubes that he uses to verify all his testers are testing properly with. I just had him recheck mine after a year about 2 weeks ago and all was well. But I'm lucky he only lives 5 miles from me. He is listed on AES sites as one of the preferred Test equipment rebuilders. Craig Quote Link to comment Share on other sites More sharing options...
fini Posted February 7, 2003 Author Share Posted February 7, 2003 Craig, The 550X is a Hickok. Actually, it's marked Model OZ-1 (Navy issue, made by Hickok), but documentation I have refers to model 550X, supposedly the same units. I can post a photo, if yer interested. I borrowed C&S's Variac today, and I'll bring 'er up tomorrow and try testing a few tubes!. fini Quote Link to comment Share on other sites More sharing options...
NOSValves Posted February 8, 2003 Share Posted February 8, 2003 Yea either post pictures of all of them or email me a photo. I can check out the specs and low down for you with my guy who calibrates them for you if you like. He can tell me which is the best of the bunch. Craig Quote Link to comment Share on other sites More sharing options...
fini Posted February 8, 2003 Author Share Posted February 8, 2003 Well used, as found. Quote Link to comment Share on other sites More sharing options...
fini Posted February 8, 2003 Author Share Posted February 8, 2003 AKA Hickok 500x Quote Link to comment Share on other sites More sharing options...
fini Posted February 8, 2003 Author Share Posted February 8, 2003 Needs some T(L)C... Quote Link to comment Share on other sites More sharing options...
Tom Mobley Posted February 8, 2003 Share Posted February 8, 2003 fini, that 600A looks pretty nice to me. I'd hang on to that, there's a couple guys that can make it work like new. here's something: http://www.hickoktubetesters.com/cal600.htm and : http://www2.gdi.net/~padgett/ I think this guy is the man on Hickok repair, restore, and calibrate, but I don't think he has a web site. chris@airpump.com Tom Quote Link to comment Share on other sites More sharing options...
fini Posted February 8, 2003 Author Share Posted February 8, 2003 Tom, Thanks for the links! fini Quote Link to comment Share on other sites More sharing options...
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