Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!ames!ncar!noao!arizona!naucse!rrw From: rrw@naucse.cse.nau.edu (Robert Wier) Newsgroups: sci.electronics Subject: Re: Do Halogen lamps need ballasts? Message-ID: <3035@naucse.cse.nau.edu> Date: 12 Dec 90 07:50:48 GMT References: <1990Dec3.183744.9175@xrtll.uucp> <4676@mcgp1.UUCP> Organization: Northern Arizona University, Flagstaff AZ Lines: 28 In article <4676@mcgp1.UUCP>, jgo@mcgp1.UUCP (John Opalko, N7KBT) writes: > In article <3026@naucse.cse.nau.edu> rrw@naucse.cse.nau.edu (Robert Wier) writes: > -> > -> The tungston re-deposition properties of halogen lamps would seem > -> a natural for life extension on transmitting tubes (IF that is > -> a desired property - maybe not for the manufacturers :-) ) > -> or would the presence of grids, plates, and other elements > -> negate the use of halogen? > > Kind of contrary to the definition of a VACUUM tube, though, isn't it? Aha! VERY good point. My brain is scrambled from thinking about silicon for too long (sigh...). I once had a QSL card which had a cartoon about some guys using plumbing tools to try to stop "grid leaks". If you remember this, you're as old as I am!!! - Bob Wier -------------- insert favorite standard disclaimers here ---------- College of Engineering Northern Arizona University / Flagstaff, Arizona Internet: rrw@naucse.cse.nau.edu | BITNET: WIER@NAUVAX | WB5KXH or uucp: ...arizona!naucse!rrw