Siemens E83CC, Philips E83CC SQ triple mica codes

[thanasisg6]

I will be grateful if anyone inform me for this tubes!!
Is fake????

 

[DF96]

Philips code for E83CC is Hf.

 

[67339]

Hello,
Usually when these kind of populair tubes pop up somewhere they are fake.
greetings, eduard

 

[Kay Pirinha]

Both tubes appear to have been manufacturd by Siemens & Halske at their Munich plant.
Best regards!

 

[thanasisg6]

thank you guys!!!
best regurds

 

[Refugee1]

The triple mica ones are most likely to have been made for when they need to be less microphonic.

 

[316a]

The triple mica ones are most likely to have been made for when they need to be less microphonic.

The extra layer is mica is not there to prevent microphony .

316a

 

[Kay Pirinha]

Yes, it provides the getter from getting into the tube structure 😉.
Best regards!

 

[JoeAlders]

Hello,
Usually when these kind of populair tubes pop up somewhere they are fake.
greetings, eduard

Now, you left me quite puzzled with this remark. Can you please supply some more info which brought you to this conclusion? Much appreciated in advance.

 

[316a]

Yes, it provides the getter from getting into the tube structure 😉.
Best regards!

Yep! Lower leakage due to less contamination of the envelope and internals during manufacture which is the purpose of the extra mica.

316a

 

[Kay Pirinha]

Now, you left me quite puzzled with this remark. Can you please supply some more info which brought you to this conclusion? Much appreciated in advance.

A shot in the dark, I'd say. But I'm also very curious on his answer 🙄!
Best regards!

 

[Jeffs]

from fleabay?
I've been eyeballing some there for many months but never followed through.

 

[thanasisg6]

i bought those tubes from an old work shop ,for very very good price

 

[Kay Pirinha]

Congrats !