I have two of these tubes:
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The information I can read from the tube is:
Tungsram
? 25/800
4V ? 800
Oscillator
Can anybody help with the correct identity the tube?
Peter
Which tube is this?
Nov 08, 2006
11 Replies
4V ? 800
Try cooling the tubes in the refrigerator, and then blow lightly on each one. This will often bring out "invisible" print.
Don
Sorry, but it was nice to look at the plate cap and grid cap on top of the tube ... have not seen that for a loooooooooooooong time!
Cross posted to: news:rec.antiques.radio+phono
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
How many pins in the base only?
Five. Four in a rectangle and one in the middle of that.
Peter
B5 base?
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See also
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I have made a CAD drawing of the base here:
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Peter
Looks like a B5 then with two grid caps. Does one cap go to the outermost tube element (plate)?
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Yes. The right must be the plate and the left must be the catode.
But which tubemodel could it be?
Peter Andersen
www.mespilus.dk
Very odd.
See if your local library has copies of the Babani tube manuals:
Comprehensive Radio Valve Guide (five volumes) by Bernard Babani, reprinted by Radio Bygones, 9 Wetherby Close, Broadstone, BH18 8JB (tel/fax
01202-658474).
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I think it is a plate cap and a grid cap.
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