How long does it take to burn in a tube?

[timdahm]

I have a new set of Full Music 6sn7's in my Yaqin mc100b, and boy are they noisy,crackling and popping. How long should this go on?

Cheers All.

 

[sony6060]

The new tubes should not make any noise new out of the box. I believe the tubes are defective. In fact, buy NOS Sylvania 6SN7 'Y' plate and never look back. Even the 6SN7GTB to about 1957 are good. 6SN7GTA are about 1950 to 1954 to nail a date by the tube number or read the proposed tube date codes. My reasoning if the tubes last 15000-25000 hours how much does the tube cost per hour. Another bit of reasoning is tubes appreciate better than many stocks in value. Coin base are too new. I see a sweet NOS lot of five Sylvania 6SN7GTB in older style boxes on ebay right now for $120.

Note- I am not selling tubes on ebay right now.

 

[Naptown Rob]

I agree. Try pulling them out & re-seating them. They shouldn't be doing that...

 

[gadget73]

new tubes should not be noisy. Dirty connections or a faulty tube are about all that would explain that.

 

[timdahm]

Oh no, it's picking up my PC

The sound these things are giving off are originating from my PC - i can tell it changes when I scroll etc. I don't think there is a solution for tubes that pick up your PC via radio....

 

[gadget73]

shields, or move the computer away from it. Maybe put it on a different outlet if it is not already

 

[sheltie dave]

If the tube is good, it will take about a minute to burn in.

 

[sony6060]

The sound these things are giving off are originating from my PC - i can tell it changes when I scroll etc. I don't think there is a solution for tubes that pick up your PC via radio....

I heard interference from electronic devices imposing on tubes- but Never in the form of popping & crackling that strongly suggests internal issues. Real curve ball here & a first for me.

 

[gadget73]

i've had the mouse make sort of a buzzing noise when moved, and sometimes monitors produce this odd popping sort of noise when images scroll on them. Maybe thats what he's hearing.

 

[sebrof]

The sound these things are giving off are originating from my PC - i can tell it changes when I scroll etc. I don't think there is a solution for tubes that pick up your PC via radio....

I've had similar issues with my phone.
Is your computer mouse wireless?

 

[Patrice B]

To add to the stories of tubes picking noise:

I was able to listen to radio through my Heathkit AA-100 by cranking the volume in phono mode without (obviously) any phono signal entering...

Patrice