[adrianc]

Sorry,should be Numbers Date Code
here are some 1552 G4s

[shoot]

Sorry,should be Numbers Date Code
here are some 1552 G4s

those tubes made in 1954,one of great sounding ecc81.I have 1 pair.

[adrianc]

shoot,have you listen to the R650 R6J Version (posted 266) to me these are the best sounding ECC81 when compared to my ECC81 stock.

[shoot]

I only have 650 R7B,It sounds great.I think yours R6J must be even better.

[adrianc]

More Mullard ECC81 declined square getter but with two holes on plate

[adrianc]

Marconi square getter



 

[shoot]

Marconi square getter

the right one are very rare,amazing 

[adrianc]

I only have 650 R7B,It sounds great.I think yours R6J must be even better.

Yes the R6J Sounds much better,more R6J



The R7B round getter version

[shoot]

Yes the R6J Sounds much better,more R6J

I know why i couldn't find R6J now.They all went to your warehouse

[shoot]

VALVO 6201 made in 1957.D getter golden feet  pinched waist 3 mica.

[shoot]

lorenz ecc81.here is 2 version,D foil getter and round getter.there's another early square getter version i don't have.

[shoot]

PHILIPS Copenhagen factory made ECC81.





I have 3 version.from left,welded plates 1 bar D getter.1 hole no bar d getter,1 hole 2 bar d getter.don't know is there any other version.

[rodama]

Hello everybody, I have been follow this thread with great interest... some awesome collection of tubes!
First my rarest piece.... Valvo Hamburg 6067/ecc82, never seen before a picture of it, I cannot figure how many of these were made...




I think this is the only tube in the ecc82/12au7 family with the typical construction of e88cc or telefunken ecc803s
kind regards

[rodama]

Different versions of Hamburg made Valvo ecc83 through years:


From left to right: november 1954,  D getter with foil strip, copper rods, small hole on side--- july 1955, D getter with bigger foil strip one point welded, nickel rods, bigger hole on plate sides--- march 1956, same as 1955 but large rectangular folded getter and larger bottle--- june 1957, same features but  45º big O getter.

I know there is also a first version made in late 1953 early 1954 with no foil on D getter and also a last made 1958-59 with smaller o getter.

greetings

[rodama]

I think maybe 4 version.
The first version is the earlist which produced in 1952,No edges on mica,plate had one hole and one middle bar,black mercury,straight D getter.(the first one on the left)
Second version No edges on mica,plate had one hole and one middle bar,silver mercury,straight D getter.
third version Four edges on top mica,plate had one hole and one middle bar,straight D getter.
fourth version Four edges on top mica,plate had two holes and two bars,wing D getter.

What about this one? August 1952 Cleartop, bottom code YKB DZ
greetings

[shoot]

What about this one? August 1952 Cleartop, bottom code YKB DZ
greetings

hello rodama.I never saw clear top versionbefore.does it still work well?

[rodama]

Hello Shoot, at first sight seems defective tube due to air inside causing mercury diluted, but it is working with strong emission and no gas, I think the coloration at top is due to hot getter .
I wonder if there is an even earlier  YKA version made in 1950-51...
Can I know the code of your darker mercury one?

[bladesmith]

These sound freaking sweet. Very lush. But, not too smooth.
Very simple design.

[rodama]

Hello Bladesmith, never seen before rca's with that same mica as in 12au7 cleartops, very interesting tube

[Guy 13]

Hi all Audio Circle members.
Those are the tubes that my wife’s nephew purchased for my birthday from TC Tubes USA according to my list and according to the recommendation from Ericus Rex.
Thanks Ericus Rex.
Here they are from top to bottom.
 
Sovtek 5AR4 (NEW)
Raytheon 6080
Sylvania 12AX7
Raytheon 12AU7
Sylvania JAN 6922
Toshiba 6BQ5 (Pair)
8570


 
This one is for my soon to arrive Bottlehead Crack headphone amplifier.
This one is unbelievably inexpensive at 15 USD for such a BIG tube.
Made in USA.
8573



Of course it’s does not look new, even if it is,
as you can see from the bottom.
8576


 
Toshiba 6BQ5 to replace a pair of EL84 EH
for my Decware SE84C+
Each box had a little piece of Styrofoam to secure the tube.
Detail that I have not seen from Tube Depot, not to name it.
8578


 
Made un Japan.
8580


 
I was surprised to see that some of the pins were crocked.
At 24 USD each, I was expecting a little better.
I hope they will sound better than the EH they will replace.
8583


 
Sylvania JAN 6922 Made in USA for my Decware SE84C+
replacing a EH 6922.
8585


 
Raytheon 12AU7 Made in USA (Thomas organ) for my Bottlehead Crack.
8586
 



Sylvania 12AX7 (Long plates) Made in USA.
To replace my 12AX7 Ruby on my Bellari VP-129.
8587


 
All the pins on all the tubes did not look clean, therefore I tried to clean them with a tooth brush and some tooth paste, and I’ve been told that tooth paste is a little abrasive.
The results were far from being good. 
Before
8589


 
After
8591
 



I don’t want to be pessimistic, but I hope that after replacing the stock tubes with the NOS tubes, I will hear a difference.
I will share with you my findings as soon as I have a minute to make the swap and sit down to do serious listening.

Guy 13