[Neogeo333]

Just and update about those National Union NAVY 6sn7gt I got a few weeks ago, well one of them is very noisy.  Just my luck, with the usual tapping and leaving it playing for 5 hours it still noisy.  About there sound, they are kind of laid back sound and definitely not on par with like say a Fivre 6sn7 or even a clear glass staggered Ken Rad. 

 

[rosgr63]

Sorry to hear this George.
 
Are these the grey glass version?
 
Take a hot soldering Iron and run over the pins a few times.
 
Sometimes a bad/deteriorating solder joint causes noise problems.
By heating up the pins sometimes the solder melts and makes a good contact again.
 
BTW you are not the only one who has this problem, when you deal with vintage tubes it happens.

 

[musicman59]

Guys and ladies,
I am reducing my rectifier and driver tube collection. PLease check out my posts in the accessories for sale forum.
 
Thanks.

 

[rosgr63]

Nice tubes!
Good Luck.

 

[blubliss]

Quote:

A friend is selling some nice British and Dutch made black base B65's and L63's.
 
The tubes are used but are rare finds and well worth having IMHO.
 
I am actually getting a couple but more are left, if anyone is interested send me a PM to give you his details.

Bummer, I got one of each of these tubes and they look great.  I should have asked my amp builder before though because he says they draw too much current to be used.  This is in the Balancing Act.  Oh well, anyone want to buy these?  

 

[rosgr63]

The B65 are the British military version of the 6SN7, they have the same specs and are safe to use on the BA, there is nothing to worry about.
 
The BA can even handle the ECC32 which draw a much higher current without any problem.
The problem comes from using the BL63 unless you have an upgraded power supply. 
 
I received my pair of B65 and a B36.
They look and test excellent and I am currently amp testing.

 

[blubliss]

Yes, you are correct, Craig told me he mistook the B65 for something else. Thank you. Will listen when I can pull myself away from the 009/T2

 

[rosgr63]

You are most welcome.
 
I would never recommend something if I wasn't 100% sure.

 

[Neogeo333]

Still, most newer BA will run BL63 fine, and that tube is recommend by Craig and other BA users.  Was it only the earlier revision of the BA that could not handle the extra amps needed for the BL63?  They kinda sound like a Mullard ecc32 but with more authority.  Got a couple when they were like 50.00 each.

 

[rosgr63]

The newest version can handle the extra current of the BL634.
The 2nd Run can handle the extra current of the ECC32, I don't know about the other versions.
Talking form memory (please double check to be sure) he 6SN7 draws 0.6A, the ECC32 0.9A and the BL63 1.4A.
 
Some people don't like the BL63's that much, so a lot depends on the system and personal preferences.
I have not tried it even though my Glenn OTL can handle the current.

 

[toschek]

The set of Ken-Rad VT231s I bought from musicman59 showed up yesterday, I LOVE these tubes. A vast improvement over the Sylvania GTB tubes I'd installed earlier. Hoping that the rest of the tubes I have for sale sell quickly so that I can pick up a backup pair.

 

[sacd lover]

Try cleaning the tube pins ....

 

[sacd lover]

Quote:

Just and update about those National Union NAVY 6sn7gt I got a few weeks ago, well one of them is very noisy.  Just my luck, with the usual tapping and leaving it playing for 5 hours it still noisy.  About there sound, they are kind of laid back sound and definitely not on par with like say a Fivre 6sn7 or even a clear glass staggered Ken Rad. 

 
 
Try cleaning the tube pins.

 

[Neogeo333]

I did, on some tubes it works but this one it doesnt help.  I have since then put on almost 20 hours on them and the noise seems to gotten better but still present.  Maybe it needs more time to settle? 

 

[rosgr63]

Have you tried heating up the pins?