Thread Number: 44914
Ozone Lamp question |
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Post# 658779   2/7/2013 at 17:23 (4,067 days old) by Kenmore71 (Minneapolis, MN)   |   | |
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In older dryers, there was often an ozone lamp wired in series with a 40 lamp that served at a drum lamp. It is always said that the 40 watt lamp served as a "ballast" of for the ozone lamp. Now, I know that if I wire 2 120 volt 40 watt bulbs in series, each will receive 60 volts and light at about half brightness.
What was the voltage on these ozone lamps? I know that they were rated at 4 watts. Did the 40 watt drum lamp burn less brightly because it was in series with the ozone lamp? Finally...were can I gets my hands on one of these old-fashioned intermediate base ozone lamps??? |
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Post# 660473 , Reply# 1   2/15/2013 at 10:56 (4,059 days old) by jeff_adelphi (Adelphi, Maryland, USA)   |   | |
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The ozone bulb is a mercury arc lamp, the filament is just to preheat the mercury vapor untill the arc starts. It must be used with some type of ballast to limit the current flow, a 40 watt bulb or a magnetic ballast were used. Here is a link to a newer style bulb that will work, but it's shape is different and may not fit all appliances that used the globe shaped bulb. I have installed these in some dryers and they work just fine. Jeff
CLICK HERE TO GO TO jeff_adelphi's LINK |
Post# 660475 , Reply# 2   2/15/2013 at 11:26 (4,059 days old) by Kenmore71 (Minneapolis, MN)   |   | |
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Post# 660507 , Reply# 3   2/15/2013 at 15:14 (4,059 days old) by jeff_adelphi (Adelphi, Maryland, USA)   |   | |
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Post# 660517 , Reply# 4   2/15/2013 at 16:48 (4,059 days old) by kb0nes (Burnsville, MN)   |   | |
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Looking at Jeff's link I'm assuming that the 10.5v rating for the bulb is after the internal arc is struck. There should be approximately this voltage across the lamp when its doing its UV thing. How long do these lamps take to arc? They are pretty small lamps so I'd guess its almost instantaneous.
The specified .3 amp current squares well with the 40 watt ballast bulb. You aren't likely to see a difference in the incandescent lamp output, at least not without an A/B comparison. That is less then a 10% line voltage difference. Color temperature of the lamp may drop a bit though. Using an incandescent bulb for current limiting has other good uses. Its handy to build up a cord with a lamp socket in series with an outlet. This can be used for powering up old electronics like radios and TV's etc. These are often referred to as a "Dim Bulb Tester". The series lamp will drop the line voltage giving a fault limit in case a capacitor shorts to save other components. Also you get a handy visual indication of current flow, if the bulb is bright you have a problem! Size the lamp accordingly with current draw the device under test would have normally. Effectively this can replace a Variac although it doesn't give control over power up. |
Post# 660558 , Reply# 5   2/15/2013 at 20:38 (4,059 days old) by toploader55 (Massachusetts Sand Bar, Cape Cod)   |   | |
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Post# 660604 , Reply# 6   2/16/2013 at 02:05 (4,059 days old) by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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Post# 660622 , Reply# 7   2/16/2013 at 08:30 (4,058 days old) by Kenmore71 (Minneapolis, MN)   |   | |
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Thank you all for your info about how these lamps work electrically.
In terms of using these in the new front-loaders - I'm sorry to say that I doubt it would be helpful in any way. The mold grows in these in the places where no light or air ever reaches if the door is kept closed. The light from one of these lamps would never shine where it was needed. At that, I don't think these lamps were ever effective at being "germicidal". They are too weak to accomplish that task given the size of a dryer drum and the speed at which clothes were moving past. From what I can tell, their primary purpose in dryers was to impart the "line dried" smell that came from the ozone they emitted. They were really more of a gimmick and selling feature than serving any medicinal purpose. Certainly in the early Maytag and Frigidaire dryers the HIGH drying temperatures (180-200 degrees) had far more germicidal effect than the ozone lamps!!! |
Post# 660635 , Reply# 8   2/16/2013 at 09:55 (4,058 days old) by combo52 (50 Year Repair Tech Beltsville,Md)   |   | |
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Actually would likely be very effective in a closed FL washer, these lamps produced enough Ozone to be quite irritating to you nasal passages that's for sure, and their would be NO safety problem installing them inside FL washers, [ many FL washers actually now have lights inside ]. However the Ozone gas can be very detrimental to certain rubber and plastic parts, finishes etc so I would not look to see them back anytime soon. I believe Ozone can also a produce a significant air pollution so again I am not sure how the widespread use of these would go over today.
As for stinky washers proper use of the machine will eliminate any problems, but with consumers today that is asking a lot, LOL. |
Post# 661927 , Reply# 10   2/23/2013 at 15:58 (4,051 days old) by TrainGuy (Key West, FL)   |   | |
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Post# 661930 , Reply# 11   2/23/2013 at 16:01 (4,051 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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The nice thing about these bulbs is that the ballast bulb almost always burns out first. |
Post# 662106 , Reply# 12   2/24/2013 at 16:22 (4,050 days old) by toploader55 (Massachusetts Sand Bar, Cape Cod)   |   | |
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Post# 859256 , Reply# 13   12/31/2015 at 08:20 (3,011 days old) by akronman (Akron/Cleveland Ohio)   |   | |
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