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 Post subject: What does this mean?
PostPosted: Wed Apr 25, 2018 3:47 pm 
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Joined: Sun Nov 13, 2016 6:01 pm
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Location: Winnipeg, MB, CA
I’ve seen the term, tube rolling. I know it refers to valve amplifier but what is it and why is it called tube rolling? Please I’m not to understanding of tech . Simple answer would help. Thanks


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 3:57 pm 
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Joined: Fri Jun 05, 2015 9:02 am
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Location: Toronto, ON, CA
Gerhard Roemer wrote:
I’ve seen the term, tube rolling. I know it refers to valve amplifier but what is it and why is it called tube rolling? Please I’m not to understanding of tech . Simple answer would help. Thanks


http://www.primaluna-usa.com/tube-rolling/


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 4:09 pm 
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Joined: Mon Oct 29, 2007 6:28 pm
Posts: 248
Location: Kaleden, BC, CA
Tube rolling is simply a matter of trying other tubes that are compatible with your tube gear. This will usually result in a different flavor and in some cases a marked improvement. Your ears will ultimately decide.


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 4:23 pm 
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Joined: Mon Feb 13, 2017 4:46 pm
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Location: Guelph, ON, CA
Gerhard Roemer wrote:
I’ve seen the term, tube rolling. I know it refers to valve amplifier but what is it and why is it called tube rolling? Please I’m not to understanding of tech . Simple answer would help. Thanks


Yes, I am wondering this also. I tried this once, but I couldn't get the damn thing lit ! :lol:


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 4:36 pm 
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Joined: Sat Jan 30, 2010 6:50 pm
Posts: 165
Location: dundas, ON, CA
vinylbrother wrote:
Gerhard Roemer wrote:
I’ve seen the term, tube rolling. I know it refers to valve amplifier but what is it and why is it called tube rolling? Please I’m not to understanding of tech . Simple answer would help. Thanks


Yes, I am wondering this also. I tried this once, but I couldn't get the damn thing lit ! :lol:

Ya your rollin the wrong stuff man.


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 5:17 pm 
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Joined: Thu Aug 03, 2006 4:43 pm
Posts: 693
Location: Ottawa, ON, CA
Too expand a little bit...
As was said, tube rolling is trying other tubes, to see if theres a sonic change. There are essentially two types of rolling:

Same tube, different manufacturer: Take a tube type like a 12ax7, a very common dual triode preamp tube. It's been manufactured by dozens of companies, each with slightly different mechanical construction, different manufacturing quality, etc. So there are small variations in the way they perform, which may (or may not) result in different sound.

or

Different tube, thats compatible with the circuit: There are also circuits that have been designed with one tube in mind, but will work with other, similar tubes. Another dual triode preamp tube for example: 6DJ8, 6922, E88CC, E188CC are all variations on the same basic design, with slightly different specs. Again, swapping (or rolling) may or may not change the sound.

As always, the sound may change, but different is not always an improvement!

Hope this helps! Cheers, Dave


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 5:32 pm 
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Location: Winnipeg, MB, CA
Thanks much Dave . Changing out tubes would have been less confusing, but I get it.


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 5:39 pm 
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Joined: Fri Jun 05, 2015 9:02 am
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Location: Toronto, ON, CA
I assumed, maybe wrongly, that tube rolling refers to frequent changing of tubes. It's probably just semantics, but if I ever changed the tubes once in my life, does that qualify for "tube rolling" on my part?


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 6:01 pm 
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Joined: Sun Jul 05, 2009 3:15 pm
Posts: 36
Location: gatineau, QC, CA
If you replace your tubes because they are at EOL, I wouldn't consider this tube rolling... Usually, it will apply to trying different vintage or suppliers of the same tubes or different but compatible tubes (eg. el34, kt88, 6550...)


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 Post subject: Re: What does this mean?
PostPosted: Wed Apr 25, 2018 7:22 pm 
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Joined: Tue Nov 30, 2004 2:33 am
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Location: Victoria, BC, CA
Its the audiophile version of the woodworkers' belt sander races.


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 Post subject: Re: What does this mean?
PostPosted: Thu Apr 26, 2018 4:13 am 
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Joined: Tue Jul 05, 2005 3:09 pm
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Location: Sherbrooke, QC, CA
It's an American expression for a game where you take properly functioning tubes of the type and brand provided for brand new in the unit by its manufacturer and replace them with many decades old NOS or used (the latter always said to measure extremely well) tubes with unknown provenance at ever increasing prices.

The use of the colloquial "rolling" is from the use of "rolled" in the sense of pulling the wool over the eye of an unwary customer or party one is dealing with.

https://english.stackexchange.com/questions/387834/what-does-get-rolled-in-eight-ways-trump-got-rolled-in-his-first-budget-negot

So the replacement tubes in a unit are rolled as a consequence of the owner of the unit being rolled by a vendor.

For the audiophile it is fun so long as he does not become addicted. For the audiophile's wife it is a source of bewilderment and embarrassment if the husband is outted. For the audiophile's children (assuming he has taken time away from his hobby to have any) it is the reason their inheritance is so paltry.


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 Post subject: Re: What does this mean?
PostPosted: Thu Apr 26, 2018 4:24 am 
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Joined: Sun Nov 13, 2016 6:01 pm
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Location: Winnipeg, MB, CA
PBB, you’re right on so many points.


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 Post subject: Re: What does this mean?
PostPosted: Thu Apr 26, 2018 4:25 am 
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Joined: Tue Jul 05, 2005 3:09 pm
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Location: Sherbrooke, QC, CA
Wind Chaser wrote:
Tube rolling is simply a matter of trying other tubes that are compatible with your tube gear. This will usually result in a different flavor and in some cases a marked improvement. Your ears will ultimately decide.



Sorry: the brain will decide.


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