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Old 12th October 2003, 04:32 AM   #1
Duo is offline Duo  Canada
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Default Anybody seen this one?

Well, here's a jab into the knowledge of the tube guys!

I am pretty sure that this picture is of a tube, but correct me if I'm mistaken.

I found this nifty little device in a bin of diodes at the school electronics shop. I cleaned it up a bit and found that it's made by General Electric. It has some numbers on it: GL-6299 which is probably the type. There's another in kind of lopsided print: 8854 which seems like it would be a serial number of some sort.


Has anybody seen this device? Can you verify whether or not it's a tube or what type it is if so?
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File Type: jpg tube.jpg (12.0 KB, 340 views)
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Old 12th October 2003, 04:43 AM   #2
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http://hereford.ampr.org/cgi-bin/tube?tube=6299
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Old 12th October 2003, 04:51 AM   #3
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Aww I just typed a reply and then stupid Acrobat plugin crashed IE. Anyway I was gonna say:

Looks like a 'lighthouse', or planar triode.. lesse if ol' Frankie has any data... Ah:
http://www.mif.pg.gda.pl/homepages/f...149/6/6299.pdf

Doesn't look good for much besides its intended purpose...

Tim
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Old 12th October 2003, 05:00 AM   #4
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This thing looks like a mini Klystron or a high-frequency valve...not so sure though...
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Old 12th October 2003, 06:00 AM   #5
Duo is offline Duo  Canada
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Quite interesting. When I found this I had no clue what it was, but by looking at it closely, I found that there were enough pins for it at least to be a triode and the it seemed to be shaped like some sort of tube.

I guess I'm good at observation?

Well, good to know what it is so I can use it in my next project.

It will make an excellent tube in a UHF radio for a gainstage or oscillator.
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Old 12th October 2003, 06:15 AM   #6
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...
so what are u planning to do witn it?? seems preety hard to break in that package...
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Old 12th October 2003, 07:04 AM   #7
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Default Funny triode

Quote:
Originally posted by Duo
Quite interesting. When I found this I had no clue what it was, but by looking at it closely, I found that there were enough pins for it at least to be a triode and the it seemed to be shaped like some sort of tube.

I guess I'm good at observation?

Well, good to know what it is so I can use it in my next project.

It will make an excellent tube in a UHF radio for a gainstage or oscillator.
Good luck finding the sockets ! If you do try to use this thing remember that the contacts will be exposed if mounted on top of the chassis . The problem with UHF valves is that they seem to like to oscillate on their own , may be problematic trying to implement , not just for the socket issue . Curves look nice though !

316a
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Old 12th October 2003, 10:07 AM   #8
Duo is offline Duo  Canada
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It'll be no problem. I'm good at fiddling with tubes so I'll make it a socket or find one somewhere.

I'll build a circuit for it and if it doesn't work properly, I can always modify it.

It's interesting just to see something like that in operation, would be a cool tube to see on the top of an open chassis.
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Old 12th October 2003, 10:03 PM   #9
dhaen is offline dhaen  Europe
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Quote:
Originally posted by Duo
..snip would be a cool tube to see on the top of an open chassis.
It would indeed look very strange. That valve is a disc seal triode designed to be mounted in a cavity. In normal service, it'd never be seen.
Bear in mind that this class of device relies on conduction cooling through the clamps that fit the rings, but in this case, being only 2W, it may not be a problem.

Enjoy
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Old 12th October 2003, 11:53 PM   #10
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Hi,

Quote:
Enjoy
...Your latest oscillator?

Planars are definitely the worst kind of female to work with...

Like most members of the opposite sex they look cute enough though...

Cheers,
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