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Post by Kempy on Jun 29, 2022 20:03:22 GMT 12
Some of you know I have a very soft spot for collecting valves, both working and display ones. The same goes for old light bulbs as well. I'll start with an interesting old "Osglim" that I picked up at a recent club auction night. The unusual thing about this one was that it had a UX4 base, and a dark bulb.
It turns out that this one was well used, hence the dark coating which I'm told is caused by the vaporization of the "Sweedish Iron" electrode.
It still has some life left in it too! ( Edit: I need a new photo editor that doesn't rotate the image randomly)
Keen to see some photos!!
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Post by Kempy on Jun 29, 2022 20:19:19 GMT 12
This is from a couple of years back when a woman contacted me, wanting to sell her coloured valves Long story short, it ended up that they were light bulbs, mainly new boxed party coloured ones from the 1970's, but there were a few of these in there which made the 3hr drive worthwhile. Manufactured approx 1905 by the Columbia Lighting company
Nice clear view of the patents
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Steve
Society Members
vintageradio.co.nz
Posts: 734
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Post by Steve on Jun 30, 2022 9:17:42 GMT 12
Wow, the filament in that Columbia one is stunning. Is it tungsten or something else?
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Post by Philconut on Jun 30, 2022 10:09:56 GMT 12
I have quite a large collection of old lamps. These are 3 which are part of the display at the Electric Light Works in Akaroa. http://www.akaroagenerator.org.nz
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Post by Philconut on Jun 30, 2022 10:36:46 GMT 12
I've had another thought about the "Osglim" unit. We also have in our museum, a very early battery charger that uses a Tungar bulb half wave rectifier, 2 filament and 1 anode connections. It looks very like this one when operating. They came in various sizes and shapes. I wonder if this is actually one of these? Some info is attached. Tungar valve.pdf (33.51 KB)
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Post by Kempy on Jun 30, 2022 19:59:47 GMT 12
I have one of the usual Spiral Osglims, You may notice in some of the pictures that there are other light bulbs beside the bulb featured and that's because I have popped them into my dim bulb tester which has 3 bulbs.
Normally a 15w, a 60w and a 200w bulb populate the sockets and I can switch each one in parallel as required if I have a greater load. ( or I'm being a chicken with something that might go bang )
In this case I needed a load plugged into the socket to complete the circuit, so the trusty Goot soldering iron was handy for that purpose.
I did note that the Neon on the soldering iron was glowing and was iron heating when in series with the dark coloured Osglim. there was no heating at all with a normal Spiral Osglim so the dark one is passing a fair bit of current.
So either it's something like what you have suggested Philconut, or it's faulty, which I still suspect as it's rated at 5w (Nice collection BTW.)
A standard Spiral Neon bulb
and the dark Osglim
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Post by Kempy on Jun 30, 2022 20:03:35 GMT 12
Wow, the filament in that Columbia one is stunning. Is it tungsten or something else? Thanks Steve, it's a Carbon filament type. 16CP 100v
Here's a pic of a Robertson GEC that I photographed tonight on low voltage.
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Post by paraglide on Jul 6, 2022 7:16:58 GMT 12
Like Kempy, my true collection love is Radio Valve history and old lamps. Here are some which I display on low Voltage. I am currently redesigning my collection display, with the valves and lamps still to be modified so a bit of a mess.
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Post by Admin on Jul 10, 2022 17:33:21 GMT 12
Here's a very old Ediswan, It's one of the oldest I have. Manufactured approx 1890 making this lamp 130 years old Carbon Filament 90v 8CP The base is Plaster Cement and there is no glass tube supporting the filament, just hooks (Possibly platinum) that connect the filament to the base connections
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