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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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22nd Oct 2021, 9:36 am | #1 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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What is this?
This looks like a valve inside but like a SES bulb on the outside. Is it a shielded bulb? or something else?
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David, G4YVM. |
22nd Oct 2021, 9:38 am | #2 |
Hexode
Join Date: Jul 2003
Location: Leeds, West Yorkshire, UK.
Posts: 455
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Re: What is this?
Looks similar to an 'Osglim' lamp - a neon... https://valvecollector.uk/cv981.htm
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22nd Oct 2021, 9:39 am | #3 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: What is this?
Ah yes, thanks. So basically a directional neon lamp.
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David, G4YVM. |
22nd Oct 2021, 9:46 am | #4 |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
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Re: What is this?
Is there any extra information on the screw cap fitting end ? I see it says Patent, England.
David |
22nd Oct 2021, 1:04 pm | #5 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: What is this?
It says
mazda BTH PATENT ENGLAND MADE IN ENGLAND Theres a number "83" The crown and AM logo and the attached, which seems to say BRH Co Ltd then "P", three lines "10" as per photo
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David, G4YVM. |
22nd Oct 2021, 1:09 pm | #6 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: What is this?
Three more photos of the innards for interest.
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David, G4YVM. |
22nd Oct 2021, 1:21 pm | #7 |
Hexode
Join Date: Jul 2003
Location: Leeds, West Yorkshire, UK.
Posts: 455
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Re: What is this?
The '83' is interesting - I may be off on a tangent but my CV981 is one of a series of indicator lamps CV981, 982 and 983. I wonder if the 'CV9...' part has worn off.
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22nd Oct 2021, 7:54 pm | #8 |
Nonode
Join Date: Jan 2010
Location: North Somerset, UK.
Posts: 2,129
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Re: What is this?
It looks rather elaborate for a simple indicator lamp.
I suspect some special application that needs a cold cathode discharge lamp with a relatively high intensity along the axis of the cylinder. Original recording of optical sound track on movie film ? Stroboscope, for examining moving machinery as if it were stopped. Counting or measuring items as they pass on a conveyor. Long range smoke detector ? a beam of light is passed along the length of say a factory to a distant receiver that detects dimming due to smoke absorption. Often used a light source modulated in the audio range, to avoid interference from daylight or from line frequency electric lights. Carbon monoxide detector, similar to the above but with special optical filters, whereby the absorption by carbon monoxide, of certain wavelengths was detected. Probably an Argon lamp rather than neon in that case. |
22nd Oct 2021, 8:16 pm | #9 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: What is this?
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22nd Oct 2021, 9:51 pm | #10 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,528
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Re: What is this?
Stick it across the mains with 100k in series and see what happens.
Resistor can be reduced/increased depending on dimness of glim!
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22nd Oct 2021, 10:44 pm | #11 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: What is this?
Nice work Lawrence
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David, G4YVM. |
23rd Oct 2021, 9:51 am | #12 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: What is this?
No problem.
Lawrence. |