Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!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: <3026@naucse.cse.nau.edu> Date: 9 Dec 90 21:18:40 GMT References: <1990Dec3.183744.9175@xrtll.uucp> Organization: Northern Arizona University, Flagstaff AZ Lines: 26 All of this talk about Halogen lights and possible destruction thereof make me wonder if similar technology is being applied to transmitting tubes (and maybe CRTs?). I know from talking to broadcast engineers that you only have a matter of seconds to shut off a 25,000 watt transmitting tube if the cooling fans fail. In fact we have a very nice EMAC tube upstairs in the electronics lab (4CX5000 I believe) that got destructed just this way. The cooling fins (made of some type of metal) are MELTED. 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? - 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