[rodama]

It doesn't looks like a Siemens ?

Bingo! It is a k61 ≠6D 

[adrianc]

The plate and getter are Phillips,but is a Siemens 

[rodama]

The plate and getter are Phillips,but is a Siemens 

Quite strange, the early Siemens Munich ecc8x have philips plate and/or getter, telefunken fat getter, valvo plates with side hole... frankenstein tubes

[adrianc]

Quite strange, the early Siemens Munich ecc8x have philips plate and/or getter, telefunken fat getter, valvo plates with side hole... frankenstein tubes

Even I never like Siemens valves but will love to try this 82,would it be a 83 version?.When I first got my welded plate D getter 82, I was wondering they should be a version with holes on plate,this Siemens tell me it do exist.

[adrianc]

These two looks identical apart one of them without bars on plate,I don't know which one is earlier but guess the one with bars is the later version.

[rodama]

Even I never like Siemens valves but will love to try this 82,would it be a 83 version?.When I first got my welded plate D getter 82, I was wondering they should be a version with holes on plate,this Siemens tell me it do exist.

The early Siemens Munich ecc82-3 with D getter are much scarce than O double support getter or single support "telefunken" fat getter.

I've never seen a Munich ecc83 with non welded plates and D getter like this one.

Siemens long plate ecc82-3 have not the clarity and top extension of other philips plants tubes made in the same period, but retain all the characteristic magical mids of 50's long plates.

There is also a Copenhagen or Holland ecc82-3 with welded plates made from 54 to very early 55 getter D with foil, much rare than "common" D  getter without foil made in 53 to late 54.

[rodama]

These two looks identical apart one of them without bars on plate,I don't know which one is earlier but guess the one with bars is the later version.

Same codes? It also can be made in the same day but the operator for any reason did not push the button that activate the making of ribbs and that's all....

[shoot]

These two looks identical apart one of them without bars on plate,I don't know which one is earlier but guess the one with bars is the later version.

I think the right one is early version,because not only with no bar,but also with an early version D getter ,the D getter is a little narrow and the wire is also alittle thick,it only appears in early version.

[shoot]

DEC,1951,made by philips venolanda S.A. D getter welded plates

[shoot]

the first version of valvo 6201,made in 1956.three mica,square getter pinched weist.

[rodama]

the first version of valvo 6201,made in 1956.three mica,square getter pinched weist.

First time I see this type, another museum tube if I see it well it habe an extra support but without getter??

[rodama]

I have no real info about this but most of the times I've found Valvo red painted codes these are very special tubes, rare ones.

[shoot]

First time I see this type, another museum tube if I see it well it habe an extra support but without getter??

1957,1958's D getter version also has an extra suppoter without getter on it.

[rodama]

1957,1958's D getter version also has an extra suppoter without getter on it.

I was refering to the top end above upper mica, it seems that does not touch the folded square getter

[shoot]

it does not touch the square getter,kind like telefunken ecc801s's extra supporter.

[rodama]

it does not touch the square getter,kind like telefunken ecc801s's extra supporter.

talking about tele ecc801s, how do you compare the sound of early double oo getter with common one?

[adrianc]

I think the right one is early version,because not only with no bar,but also with an early version D getter ,the D getter is a little narrow and the wire is also alittle thick,it only appears in early version.

I can't see any different size of the getter and the wire  :scratch:but when looking at the 1552 version the plate doesn't have bar on it so I guess the Bar Version is a later version

[adrianc]

DEC,1951,made by philips venolanda S.A. D getter welded plates

]
this Mullard have the same welded plates but how can it was made in 1956 compare to 1951,five years welded plates still in production ? I doubt it.

 

[rodama]

Welded plates in 1956? quite strange, wrong codes?

[adrianc]

Welded plates in 1956? quite strange, wrong codes?

If the printed is right ( R6D ) then the 1951 version should not been made in that year.