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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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23rd Feb 2020, 6:20 pm
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#1 |
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Diode
Join Date: Feb 2020
Location: Teddington, London, UK.
Posts: 3
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Interesting Component for......?
Hello all - have just found this while clearing the loft at dad's house. I wonder - would anyone have any idea what it might be and where it might have been used?!
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23rd Feb 2020, 7:02 pm
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#2 |
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Nonode
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,336
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Re: Interesting Component for......?
It looks like a valve of some kind, though I'm not an expert on the type.
I think the frame is there to protect it during transport and absorb shocks rather than being part of some equipment. No doubt someone will be along shortly and tell you what it is, when and where it was made and have a datasheet! |
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23rd Feb 2020, 7:33 pm
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#3 |
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Octode
Join Date: Jan 2003
Location: Ware, Herts. UK.
Posts: 1,082
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Re: Interesting Component for......?
This looks like it might be a silica valve; the envelope is made from silica rather than ordinary glass. This allows it to run at higher temperatures and has some other advantages at radio frequencies. These were used in military applications and early radar systems. If it is an early radar valve it is of significant historical interest and may be valuable.
See here http://www.r-type.org/addtext/add024.htm John |
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23rd Feb 2020, 7:34 pm
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#4 |
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Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Interesting Component for......?
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23rd Feb 2020, 9:44 pm
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#5 |
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Hexode
Join Date: Dec 2019
Location: Hohenroda, Eastern Hesse, Germany
Posts: 462
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Re: Interesting Component for......?
Hi,
so it is clear it is a mercury vapor rectifier. Those were widely used in industrial applications - from speed variable motors to streetcars. Nice collectors' item, and nice to watch in operation! But always remember: Mercury is poisonous, so it is strongly advised to avoid breaking the glass. Regards, Joe |
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23rd Feb 2020, 9:48 pm
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#6 |
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Nonode
Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,336
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Re: Interesting Component for......?
I think that goes for all valves, Joe!
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24th Feb 2020, 12:36 am
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#7 |
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Diode
Join Date: Feb 2020
Location: Teddington, London, UK.
Posts: 3
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Re: Interesting Component for......?
Thanks everyone - impressively rapid! Now need to decide what to do with it.....
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24th Feb 2020, 10:03 am
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#8 |
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Heptode
Join Date: Jun 2017
Location: Southport, Merseyside, UK.
Posts: 646
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Re: Interesting Component for......?
If it has a silica glass envelope then it may well emit a lot of harmful UV light in operation
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Time flies like an arrow, fruit flies like a banana |
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24th Feb 2020, 12:07 pm
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#9 | |
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Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,959
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Re: Interesting Component for......?
Quote:
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24th Feb 2020, 12:51 pm
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#10 |
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Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,397
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Re: Interesting Component for......?
I wonder if Electrokinetica would be interested in it? Whilst Lucien Nunes of the forum is best known here re. mercury arc rectifiers, something like this surely has a place in electrotechnical history.
The filament rating of 1.9V at 68A is impressive in itself, a bit outside of what usually comes up for discussion here! |
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24th Feb 2020, 11:27 pm
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#11 |
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Diode
Join Date: Feb 2020
Location: Teddington, London, UK.
Posts: 3
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Re: Interesting Component for......?
Noted Paul - but dont worry - not planning to bin it. Its a lovely bit of historic kit. Obviously tempted to sell it if I can find the right place, but if no takers I'll be looking to a museum or collector to give it to. Until I took it out of the box I had assumed that it was a replacement CRT for an old Murphy telly that I'd found up there next to it!
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