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Old 28th October 2004, 02:04 PM   #1
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Default Need info about rare Siemens Cf "post tube"

Hello,

I have a pair of those gorgeous and rare Cf tubes made by Siemens. They are telecommunication triodes (post tubes) with very low internal resistance and low mu (~6.0).

My question is: does anybody could provide me with more application info about Cf tubes? I tried to find more info via google but "Cf" is too usual phrase to obtain any relevant results.

Thank you.
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Old 28th October 2004, 02:22 PM   #2
alejo is offline alejo  Argentina
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Any numbers un your tubes??

alejo
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Old 28th October 2004, 02:37 PM   #3
RE 604 is offline RE 604  Germany
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Hello ,
take a look here

http://www.hts-homepage.de/Post/POCf.html


Regards , AlexK .
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Old 28th October 2004, 02:37 PM   #4
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No, just "Cf" mark on them.

Regarding this link they're long distance telecommunication triodes.

Thank you for the link, RE 604.

Mine have different glass shape and they're made in the 50s.
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