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6SN7 Tube Addicts - Page 189

post #2821 of 4150
Quote:
Originally Posted by rosgr63 View Post

I have seen them with White or Green writing, but not with yellow.

It will be very interesting to see them.

 

For gossips the yellow marking just say I will not, tubes with yellow markings were issued in 1940.
I only saw the military version of this lamp with light green markings on the base in 1945.

Photo:

http://uaimage.com/tsi/2166950_36badc86.jpg?key=vygEA5N2PRCRKzhhT4bcEA

http://uaimage.com/tsi/2166951_0ae4662a.jpg?key=PphCEoSdGMLOsboRLIee8w

http://uaimage.com/tsi/2166952_407d4432.jpg?key=DAyTjdymbEg1h7_IjVWpGw

 

Quote:
Originally Posted by rosgr63 View Post

The round mica were made first then the oval mica and then the round mica again.

 

I too can't say for sure.

People say that oval mica sound best.

However I have found differences between steel and copper grid posts, the later sounds better to me in my system.

I also prefer the Tung-Sol 6SN7GT "Round Plate" with copper grid posts smily_headphones1.gif.


Edited by StalkerAssassin - 11/5/12 at 9:23am
post #2822 of 4150
Thread Starter 

Добрый вечер

 

I am sorry but I can't see the photos, can you upload them here please?

 

BTW the GEC 6AS7G you are using in your La Figaro 336 are very nice tubes.

post #2823 of 4150
Quote:
Originally Posted by rosgr63 View Post

Добрый вечер

I am sorry but I can't see the photos, can you upload them here please?.
I'm sorry, here please:

Quote:
Originally Posted by rosgr63 View Post

BTW the GEC 6AS7G you are using in your La Figaro 336 are very nice tubes.
Fully agree with you.
post #2824 of 4150
Those technically are not the "bad boy". They have two holes in the plates. Still, VERY nice VT-231 tubes, I have some, they sound great!


Here are my black-plate Selectron/Raytheon tubes. I think there is little doubt these were USA made. USA etched in top of glass, and also engraved in base.

6CD2452F-C5E4-4346-9026-C2FF1CD420CD-331-00000026836BC8BA.jpg
34E823B8-7C43-4030-A2D5-E8D1D7AA6396-331-000000268D1AD99E.jpg

But in any case, for $10 each NOS/NIB, not bad biggrin.gif
post #2825 of 4150
Quote:
Originally Posted by Skylab View Post

Those technically are not the "bad boy". They have two holes in the plates. Still, VERY nice VT-231 tubes, I have some, they sound great!
Is is "Bad Boy" just 3-hole anode? I thought that with 2 holes in the anodes also "Bad Boy". What are the differences in the sound of your hearing between the 2 and the 3-hole in the anode tube?
post #2826 of 4150
Quote:
Originally Posted by StalkerAssassin View Post

Is is "Bad Boy" just 3-hole anode? I thought that with 2 holes in the anodes also "Bad Boy". What are the differences in the sound of your hearing between the 2 and the 3-hole in the anode tube?

 

The whole idea of the "bad-boy" to me is silly.  It's just a funny name someone once gave to a specific batch of Sylvania tubes.  But yes, the "Bad Boy" refers to the three holes tube only, from a short period of the 1950's.

post #2827 of 4150
Please tell me, what feature of the high cost of the tube G.E.C./Osram/Marconi B65? Is it worth its price?

I apologize if this question has already negotiate.
post #2828 of 4150
Thread Starter 

I must confess the MOV B65 do sound very good.

Just testing some recently purchased B65's, they reminded me how very good they are.

 

The earlier version with the inverted cup getter like the ones I showed in 2781 & 2788 been the older and more rare type.

 

Now do they worth the crazy money some sellers ask?

 

Unless you are a collector NO.

If you are lucky you can score some nice ones for a fraction of what some sellers ask.

post #2829 of 4150

These are exceptional tubes, no matter what some says, cos, no other tube sounds like it, imo.

 

THX

Quote:
Originally Posted by StalkerAssassin View Post

Please tell me, what feature of the high cost of the tube G.E.C./Osram/Marconi B65? Is it worth its price?

I apologize if this question has already negotiate.
post #2830 of 4150
Quote:
Originally Posted by rosgr63 View Post

I must confess the MOV B65 do sound very good.
Just testing some recently purchased B65's, they reminded me how very good they are.

The earlier version with the inverted cup getter like the ones I showed in 2781 & 2788 been the older and more rare type.
Coll, very thanks for the information. It turns tube with clear glass for the older that spray?
I will "catch" this rarity biggrin.gif.


Found the net for information on the date code of British tubes:
A - 45
B - 46
C - 47
D - 48
E - 49
F - 50
G - 51
H - 52
J - 53
K - 54
L - 55
M - 56
N - 57
P - 58
Q - 59
R - 60
S - 61
T - 62
U - 63
V - 64
W - 65
X - 66
Y - 67
Z - 68
Whether it is correct information?
And if I should highlight a letter indicating the date code units in the photo?

G - 1951


V - 1964
Edited by StalkerAssassin - 11/5/12 at 1:08pm
post #2831 of 4150
Quote:
Originally Posted by Skylab View Post

But yes, the "Bad Boy" refers to the three holes tube only, from a short period of the 1950's.

 

From my tube source...

 

Later GT versions were in a medium glass envelope with a green label and blackplates with bottom getter, sometimes called the "Bad Boy" 6SN7, and are sought after for their excellent sonics. The Bad Boy tubes are virtually identical to the military VT-231 from the early 1950s and are currently a less expensive alternative, but this could change as the Bad Boy fad catches on! A side note about Bad Boys, there were versions with 2 rivet holes in each plate, and versions with 3 holes. Both types sound identical. Don't fall for the bogus story that only the 3 rivet hole types are the true "Bad Boys"! You will miss out on some great sound from the 2 hole type, since the 3 hole versions are more difficult to find, more expensive elsewhere, and don't sound any different! I suspect the "3-hole only" story got started by my competition to justify charging a higher price for these tubes!

post #2832 of 4150
See, that's my point EXACTLY. There is no "official" definition of a bad-boy, and it's a term that was invented by someone to help sell a particular variant he once had, and people have subsequently tried to expand it to fit their personal view of the world, and their stock of tubes to sell rolleyes.gif

If you cannot refer to a tube solely by the specific construction it has, or the exact dates of production, it's useless.

Anyway, thus ends my second bad boy rant. The Sylvania VT-231 as pictured above is a fine, fine tube!
post #2833 of 4150

Indeed it is.  FWIW, StalkerAssassin, the VT-231 shown in your photo actually pre-dates the production era of the "bad boy" tube and probably was made around or just before 1950.  I think the whole bad boy debate has become rather silly too given how much misinformation gets spread around about it.  It was proven some time ago that certain Sylvania 3-hole plate tubes made on some older military tooling sound different from the rest of the T-plate style tubes of their era, and somebody once proved they had different internal construction by dissecting one of each and comparing them.  This is arguably the tube that is supposed to have the "bad boy" name but in the end it is nothing more than a word somebody decided to apply to a particular tube, one variation amongst dozens and dozens which all sound good in their own way.

 

Rob, I think your Ray's are USA made too.  They must be a slightly early type of GTB before they started doing the shorter glass bottle and the plate wired side getter.  I'm guessing they have a very lively and punchy sound if they're the tubes I think they are?

post #2834 of 4150
You nailed it, X. Lively and punchy is the perfect description !!!
post #2835 of 4150
Thread Starter 

British tubes codes are very confusing to me.

I am still trying to find a way to decipher them.

 

SA thanks for this nice table, your info could be right.

 

The G (1951) dated tube shown in the photo has an inverted cap getter which is early production.

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