[Bob383rad]

tejastubes.com
 
Sorry

 

[decade127000]

very helpful! i am finding the tube for my AMP

 

[Bob383rad]

When I ordered the tube online, he phoned me to ask what my amp was and how I was going to use this tube. Inner space started a thread discussing the Pinnacle vs the Leben 300 in which he discussed his favorite 6sn7 tubes for these amps. It was a 2011 thread.

 

[r one]

Hi there,
 
i've received two new tubes for test with my BA : rca 6sn7 grey glass. One of them has a silver ring at the bottom of the bottle and marked H6E, the other is marked H3E ans hasn't got this silver ring. What is the difference : year of production ?

 

[Nic Rhodes]

Yes B65 is a wonderful tube, especially the metal based ones. It was launched after the second world war in 1948 I think but is firmly in the golden 20 years of valves from late 20s to late 40s. I am lucky I have a few I use myself. They were made by GEC / Marconi / MWT / Osram in the UK but you will also find Holland examples (with Black phenolic bases). Great tube, with real delicacy and finesse..

 

[Badas]

Hi there,

i've received two new tubes for test with my BA : rca 6sn7 grey glass. One of them has a silver ring at the bottom of the bottle and marked H6E, the other is marked H3E ans hasn't got this silver ring. What is the difference : year of production ?

I have a few sets of greyglass. I find them a fun tube. Never seem to get two tubes the same and a lot are very crooked. To me it is part of their charm. They didn't care how they looked then they were just punching them out. They will be painted different everytime. Sometimes with internal scratches from internal electronics scraping the paint as they were installed. I even have a set with the same manufacture and batch codes that look different from each other.

To answer your question. Yes different production dates.

RCA greyglass's are handy to tame bright tubes or headphones. My favorite 6SN7.

 

[Oskari]

  Hi there,
 
i've received two new tubes for test with my BA : rca 6sn7 grey glass. One of them has a silver ring at the bottom of the bottle and marked H6E, the other is marked H3E ans hasn't got this silver ring. What is the difference : year of production ?

 

  Most of the RCAs I've seen don't have that slim band of getter visible, but there seem to have been batches where the glass coating stopped a little short and produced just that.

 

[Oskari]

  They were made by GEC / Marconi / MWT / Osram in the UK but you will also find Holland examples (with Black phenolic bases).

 
Though obviously printing B65 on a Dutch tube doesn't make it an MOV B65.

 

[Nic Rhodes]

The are labelled Marconi, Holland B65.  All clear and above board which is why I mentioned it to show people the difference. They come in nice Marconi boxes also. They are the genuine artice but are not made in the UK which is probably what most want.

 

[Oskari]

These tend to be pretty things, especially the boxes, so photos would be nice.

 

 

[Stereolab42]

  Hi there,
 
i've received two new tubes for test with my BA : rca 6sn7 grey glass. One of them has a silver ring at the bottom of the bottle and marked H6E, the other is marked H3E ans hasn't got this silver ring. What is the difference : year of production ?

 
H6E = 1944 Nov/Dec
H3E = 1944 May/June

 

[r one]

thanks for your help guys. RCA grey glass are fun tubes with very good results for price, but not my favorites

 

[Nic Rhodes]

  These tend to be pretty things, especially the boxes, so photos would be nice.

 

 EASY
 

 

 

 

 

[r one]

wonderful

 

[TonyNewman]

 
 EASY
 

 
I do like me some purty valves...