Unknown mini triode

ID: 325035
? Unknown mini triode 
23.Jul.13 12:03
9

Sander Stols (NL)
Articles: 3
Count of Thanks: 15

Hello everyone,

I have two small triodes in my possession of which I know nearly nothing. Experimentally it appeared that the filament voltage was about 6.3 V. That is all I know. There is no marking to be seen on the glass envelope, so I am totally in the dark.

Anyone have any ideas?

Regards,
Sander Stols

Attachments:

To thank the Author because you find the post helpful or well done.

 2
955 UHF Triode 
23.Jul.13 12:17
9 from 4456

Dietmar Rudolph † 6.1.22 (D)
Articles: 2492
Count of Thanks: 14
Dietmar Rudolph † 6.1.22

 3
That must be it! 
23.Jul.13 12:25
13 from 4456

Sander Stols (NL)
Articles: 3
Count of Thanks: 14

Thank you Dietmar Rudolph for your very quick answer! I think you are right: it looks very much the same. The glass envelope is frosty so it is nearly impossible to see anything inside. And the red top seems to be on the outside, so it is probalbly not original.

Regards,

Sander

 

To thank the Author because you find the post helpful or well done.

 4
Acorn 
23.Jul.13 14:05
30 from 4456

Michael Watterson (IRL)
Editor
Articles: 1036
Count of Thanks: 7

Sometimes called "Acorn" valves.

I tested an RCA 955 a couple of weeks ago (loaned) on my newly built uTracer. It looks identical. Of course there are a number of similar devices in that package. I just uploaded the curves to the 955 page (click on "more" on Characteristics).

To thank the Author because you find the post helpful or well done.