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Explain this picture. ( I have my opinion).

T

Tom Wells

Summer of 2007, went to basement and turned on the light. It turned on but looked funny.
Ran for about three hours like this. What do you think is going on here.

I apologize for the level on this podcast (No 14) being too hot. Sounded good but I wasn't able to use headphones this time.
#13 was better for levels.

I think the bulb is conducting on plasma. I wasn't there waiting, so I didn't see when it went out.

http://thomasjwells.podOmatic.com/entry/2008-01-08T21_21_04-08_00
 
At the risk of being indelicate, do light bulbs go gassy? Or can they "take on air"?
 
Is it just my eyes or does the filament look like it's broken? That's amazing. I know current incandecent bulbs have an inert gas to prevent the tungsten filament from evaporating too quickly and blackening the inside of the glass. I guess it could get excited by the arc between two pieces of broken filament, like a neon lamp. ???
 
robgrayson said:
At the risk of being indelicate, do light bulbs go gassy? Or can they "take on air"?
Click to expand...

Indelicate why? If the Mythbusters have an episode called "Do pretty girls fart?" why cant' a lamp have gases? ;D
Remove this post if offensive... Not my intention...
 
Looks to me like the lamp has lost some of its vacuum.. ie has had an air admittance.

They will run like this for a while, but eventually the filament gives out.
 
We had an open air feedline for WGBF years ago. 6 copper wires on standoffs around a single copper wire. All non stranded ground type wire. (War years cost savings.- WMLL used the same feed as an FM in the 1940's)

We would use a neon bulb to detect insignificant problems in the (feedline) by walking with the bulb up and down the tower field every so often. Follow the line to both AM towers. Even during the day a lighter area on the line as indicated by the neon bulb would mean someone had nicked one of the wires. We would switch the array to a single tower for repairs at night. Since this was all at head level it was a regular practice for the un fenced field to have vandalism. In the 1940's the lines were solid all the way to both towers. By 1986 splices and solder could be noted on all lines.

The same line was used inside the building and the neon lights would glow at night even if they were off. Off and on were relative in terms of luminance. 5 kw.


Results of RF can be interesting. All staff engineers at WGBF (who lived in a house between the towers near the open air line) lived to be in excess of 80. We could never use electronic phones in the house (only 1952 ma bell rotary dial phones) and every computer I tried while I lived there literally smoked when plugged into an outlet.

We regularly got calls from a car dealership 5 miles away asking us to remove our station from music on hold. (They didn't have music on hold as an option I discovered but got this as a bonus of being in the rf footprint)

At WLW light was regularly generated in Mason Ohio on incandescent bulbs by the 500 kw transmitter. (Read WLW: The Nation Station). Reports of the same thing with the 50 kw transmitter were reported regularly as well.
 
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