[rodama]

Difficult than ghost hunt

almost impossible  

[rodama]

To me it mean Special or speciaal in Dutch.

It can be, the S is hand made,......can you imagine an operator marking hundreds of these every day? in that case these tubes should be really "S"pecial, but now the question would be: why?

[FullRangeMan]

It can be, the S is hand made,......can you imagine an operator marking hundreds of these every day? in that case these tubes should be really "S"pecial, but now the question would be: why?

Because it was necessary mark these valves and someone had to do it.
Probably the factory had abundant employees.

[shoot]

Telefunken made a lot of versions for each type of tube, also prothotypes extremely rare.... I still wonder about a Telefunken ecc83 1950-52 square getter white base....or ecc801 double o getter...

1956 and early 1957's telefunken ecc801s has double fat O getter.I have post the picture in 694

[adrianc]

Because it was necessary mark these valves and someone had to do it.
Probably the factory had abundant employees.

S stand for shoot or the workers were watching Superman movie during the assemble 

[shoot]

 

[rodama]

1956 and early 1957's telefunken ecc801s has double fat O getter.I have post the picture in 694

So it really exists... those are extremely rare tubes....keep them as a treasure!

[rodama]

Because it was necessary mark these valves and someone had to do it.
Probably the factory had abundant employees.

Agreed it was necessary to mark it because these are special, but what makes it that special was the question; internal features? extremely strong values or matched sections? ......

[shoot]

So it really exists... those are extremely rare tubes....keep them as a treasure!

and another 1957's bizarre one with only one supporter.

[rodama]

and another 1957's bizarre one with only one supporter.

this one can be a prothotype.... rarer than rare!

[rodama]

the earliest version of Telefunken el84, logo print in negative, ceramic base and no diammond bottom

[FullRangeMan]

Agreed it was necessary to mark it because these are special, but what makes it that special was the question; internal features? extremely strong values or matched sections? ......

Well, maybe the factory engineer could explain this, if he is alive yet.

[adrianc]

the earliest version of Telefunken el84, logo print in negative, ceramic base and no diammond bottom

Ah,I like it 

[shoot]

Ah,I like it 

this logo is pretty than normal telefunken logo

[shoot]

the earliest version of Telefunken el84, logo print in negative, ceramic base and no diammond bottom

it says there's also clean top version,have you ever saw it?

[adrianc]

I'm only have these

[shoot]

telefunken el84 with no hole on the plate.

[rodama]

it says there's also clean top version,have you ever saw it?

No, never seen a single one cleartop, but heard (not seen) about a double o getter wrinkled glass 1952-54 made....

[rodama]

I'm only have these

very early, june 1953, these must be 3rd version

[rodama]

Ah,I like it 

ok, no one knows these are rft made in the early 80's rebranded Telefunken?