|
Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
|
Thread Tools |
14th Apr 2015, 7:06 pm | #21 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
|
Re: "beehive" neon lamp
My Beethoven shotfiring exploder has a resistorless BC neon bulb in it. The function of it is not just to provide an indication that the main capacitor has been charged via the voltage doubler, but to 'strike' and prevent further charging.
It's driven from a hand-magneto type 26A as found in telephones, and so the internal resistance of the transformer winding will limit the current which, in any case, can't exceed 100mA. https://www.***********/photos/russel...7631532498196/
__________________
Regds, Russell W. B. G4YLI. |
15th Apr 2015, 7:32 am | #22 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,553
|
Re: "beehive" neon lamp
I have got some of those type of neons.
They do indeed have resistors fitted in the base and work fine on regular mains AC voltage. I also have one of the fuse holder type that can be used to indicate polarity on a DC supply as one end or the other lights up depending on polarity. I have absolutely no idea about the stubby one that is a little bit larger than an MES though. |
15th Apr 2015, 9:53 am | #23 |
Pentode
Join Date: Nov 2011
Location: Wigan, Greater Manchester, UK.
Posts: 147
|
Re: "beehive" neon lamp
If you can get hold of a copy of Newnes Wireless Constructor's Encyclopedia a similar lamp is used in making a mechanical (scanning disc) television. I don't have a copy to hand but I am certain it mentions something about a resistor in the bayonet base that can be removed to make it glow brighter. I too recall these being used as a nightlight.
|
15th Apr 2015, 10:34 am | #24 | |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
|
Re: "beehive" neon lamp
Quote:
When you think, I suppose neons were used far more prolifically in that period from the 1930s - 1960s and there must've been lamps made for all sorts of industrial purposes.
__________________
Regds, Russell W. B. G4YLI. |
|
19th Apr 2015, 1:29 pm | #25 | ||
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,199
|
Re: "beehive" neon lamp
Quote:
Quote:
|
||
21st Apr 2015, 9:14 pm | #26 | |
Rest in Peace
Join Date: Sep 2010
Location: Ripley, Derbyshire, UK.
Posts: 785
|
Re: "beehive" neon lamp
Quote:
It has a magnifying lens end as part of the glass bulb. It is fitted with an internal series resistor, and was 'rescued' from an old German-made (?pre-war) water heater. I think it was original, so it is probably of German manufacture. Tony. |
|
22nd Apr 2015, 12:24 pm | #27 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,553
|
Re: "beehive" neon lamp
I have no idea where my stubby lamp came from but it is a magnifying type and it has 380V stamped on it with no makers name. Perhaps it came from something industrial.
|
26th Apr 2015, 6:55 pm | #28 |
Rest in Peace
Join Date: Sep 2010
Location: Ripley, Derbyshire, UK.
Posts: 785
|
Re: "beehive" neon lamp
I had a rummage in the overflowing "miscellaneous bulbs and neons" box in the workshop today, and found the German one mentioned in post #26 above, still in its chunky little Bakelite holder. It has neither a maker's name or built-in lens, but I found a similar one with an integral lens made by Osram. Both have internal series resistances. Tony.
|