Article View: sci.electronics
Article #8705Re: Do Halogen lamps need ballasts?
From: Johnathan Vail
Date: Mon, 03 Dec 1990 19:10
Date: Mon, 03 Dec 1990 19:10
36 lines
1959 bytes
1959 bytes
In article <75525@iuvax.cs.indiana.edu> commgrp@silver.ucs.indiana.edu (BACS Data Communications Group) writes:
Halogen lamps do not need ballasts, however, large halogen lamps and
arrays of lamps are sometimes connected in series with low-inductance,
high-current, air-core "inrush chokes" to protect switch contacts:
Resistance of metal increases with temperature; there is significant
difference between tungsten's cold resistance and its resistance at
halogen-lamp operating temperature.
I posted a question about some halogen trak-lights. I have found a
few more things out (like the bulbs still work). To re-cap my earlier
post and pose the question differently:
* I bought a set of trak lights and some 110v halogen bulbs
* the bulbs didn't work in the fixture so I tested the bulbs with
a meter and they read open. it was easier than trying another
fixture. I assumed something killed them
* The bulbs are now known good and the original problem is solved
(the fixture contact needed adjusting)
MY QUESTION:
Why does the bulb read open on a 20 meg scale?
Theory: the rectifier circuit is causing this?
jv
``There's nothing remarkable about it. All one has to do is hit the right
keys at the right time and the instrument plays itself.'' -- J. S. Bach
_____
| | Johnathan Vail | n1dxg@tegra.com
|Tegra| (508) 663-7435 | N1DXG@448.625-(WorldNet)
----- jv@n1dxg.ampr.org {...sun!sunne ..uunet}!tegra!vail
Technical Details
Message-ID:
<1806@atlas.tegra.COM>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!know!tegra!vailReferences:
<75525@iuvax.cs.indiana.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!know!tegra!vail From: vail@tegra.COM (Johnathan Vail) Newsgroups: sci.electronics Subject: Re: Do Halogen lamps need ballasts? Message-ID: <1806@atlas.tegra.COM> Date: 3 Dec 90 19:10:04 GMT References: <75525@iuvax.cs.indiana.edu> Organization: Tegra-Varityper, Inc., Billerica, MA Lines: 36 In-reply-to: commgrp@silver.ucs.indiana.edu's message of 30 Nov 90 22:42:43 GMT