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Old 25th August 2012, 10:15 PM   #1
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Default Tube break-in?

Does tube break-in exist? Obviously they age, but is there a period where they get "better"? If so, in what way "better".
I bought a bass amplifier with a 6205 in the pre amp. Yes I know that its not a "real" tube like a EL84 or a 12AX7, and its not the reason I bought the amplifier. I'm just curious.

P.S. its hard to search on a word like "break". Sorry.
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Old 25th August 2012, 10:30 PM   #2
DF96 is offline DF96  England
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Valves which have been unused for a long time (40-50 years!) may get a bit gassy and so have some grid current. A few hours use will give the getter time to deal with this so the grid current will reduce. Some might call this 'break-in', but a new valve with a good vacuum does not need it.
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Old 26th August 2012, 01:03 AM   #3
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i googled your first sentence......tube break-in exist - Hanapin sa Google
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Old 26th August 2012, 01:12 AM   #4
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tubes simply change over time.

one might say that they sound worse as it happens, others might say they sound better.

Remember, you are talking about your musical instrument: however it sounds, as long as the circuits work properly (and maybe without this restriction either!) it is the sound of your instrument. If you don't like the timbre it has, what does it matter if the tube is broken in or not?
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Old 26th August 2012, 06:15 AM   #5
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Quote:
i googled your first sentence......tube break-in exist - Hanapin sa Google
The first entry is THIS thread. The second is a mirror of this thread. There are no other relevant entries. Thank you for repeating my point.

Quote:
tubes simply change over time.
Which I also stated.

I understand that tubes degrade. What I was asking was if tubes have an initial period (minutes / hours / days) where they reach their best potential.
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Old 26th August 2012, 06:23 AM   #6
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tubes have life span ratings, some 1000 hours others have more....

i thought post#2 have summed it all...

you must have been reading audiophool literatures.....read the datasheets for tubes instead, see if you can find something there....

but tubes degrade each time you power them up and once you start using them, so i don't know what "reach their best potential" actually means....

sorry, can't help you there.....
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Old 26th August 2012, 11:53 AM   #7
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Quote:
Originally Posted by Pbassred View Post
The first entry is THIS thread. The second is a mirror of this thread. There are no other relevant entries. Thank you for repeating my point.

Which I also stated.

I understand that tubes degrade. What I was asking was if tubes have an initial period (minutes / hours / days) where they reach their best potential.
well, they need some time to warm up. my 15W laney takes all of 10 seconds to do that (15 in the winter). more powerful amplifiers take more time.
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Old 26th August 2012, 12:30 PM   #8
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Now this is just my opinion and opinions as as cheap as chips.
Do yoy have a TV? What do you do when you switch it on?
Do you wait a few seconds, select a programme, watch it and enjoy? Or do you check out how its working and if its at it's peak?
Get my point?
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Old 26th August 2012, 01:13 PM   #9
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People seem very dismissive bordering on the aggressive, because I asked a simple question.

Quote:
and its not the reason I bought the amplifier. I'm just curious.
Its a THING. Things are designed to do a job. Thing need a while to settle down. For an engine that's 500miles. For a speaker it can be 10 hours. A tube? could be milliseconds could be hours. I didn't know. I came to a specialist forum to find out. It does not mean that I want a particular answer. Just asking.

It does not matter

Calm down

Goodbye. Unsubscribed.
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Old 26th August 2012, 10:24 PM   #10
AJT is offline AJT  Philippines
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Default "reach their best potential"

okey, from a purely technical pov. tubes reach their working potential several seconds after switch on every time you switch on your amp.......

this is because the filaments need time(several seconds) to reach their working temperature for the cathode to start emitting electrons and for the plate to start drawing plate current....
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