2. vintage
  3. 163402-79323

Any tube experts out there?

Cleaning out and organizing my audio and camera closet I got all the way to the back where I founds something I had long forgotten I had...... bought maybe 15 or more years ago. A pair of Siemens and Halske 6922 CCa Grey Plates with round getter and the following codes.... 34.210 and 32.176. In the dark recesses of my memory I remember buying a few pairs of NOS of these 15 or 16 years ago... pins and writing on the tubes is immaculate, like brand new.
Anyone got an idea what date these are? I had gotten some real beauties from this guy back them.. 1958 Pinched Waist Valvos and other stuff you just didn’t see, even back then..
midareff1
tomcy6's avatar
tomcy6
2,587 posts
 
The best I can come up with is that they are pre-1960 CCa:

https://www.tubemuseum.org/SearchResults.asp?Cat=24

For the old "Gray-Plate" early 1960's SIEMENS HALSKE E88CC and CCa:

Make sure you are buying Real Siemens Halske CCa = E88CC / 6922 tubes - They have the double-stage getter frame-grid construction, Gray separator or Gray Electro-static shield, 4 seams on top and numbers in the glass between the pins and the Siemens & Halske S+H logo on the front of the tube

with "painted serial numbers" for the pre-1960 versions

 and ACID-CODES for the 1960 - 1965 versions. After 1966 the acid-codes may change to codes stamped on tiny metal rectangles soldered onto the sides.
jjss49's avatar
Ag insider logo xs@2x
jjss49
6,612 posts
 
They are tube production designation codes. LOL, for you newbies... and almost all of you are. The venerable 6DJ8 tube had many replacements, If you don’t know what type of equipment it was used in you can stop reading here. It was a superior voltage amplification tube to coupe with a amperage amplification amplifier. Actually, the year and vintage I cited was the best ever mad according to all reliable sources.

op asking for help yet being condescending... nice...

having said that -- this is a case where being able to post a pic would be so helpful
dill
2,517 posts
 
I know the answer to his questions, however " for you newbies... and almost all of you are", I guess I am a newbie so I don't.
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