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Coupling capacitor burn-in

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Posted on February 9, 2017 at 09:06:48
KanedaK
Audiophile

Posts: 2519
Location: Brussels
Joined: April 27, 2010
 I've ordered a couple of Russian PIO K40y to replace the arcotronics input coupling caps in my Trends TA10.1.
I usually rely on just casual listening to burn in caps but I wonder about one thing: if my Trends is turned off, will it still be seen as a load to the separate preamplifier, and will the signal still go trough the input caps?
Would be nice to know I can just turn all the power amplifiers (including the Trends, thus) off and silently burn in the new caps.

 

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RE: Coupling capacitor burn-in, posted on February 9, 2017 at 15:15:36
Cougar
Audiophile

Posts: 4574
Location: SoCal
Joined: June 25, 2001
 There is a lot of info on this on the web and here on AA. Do a search and it will come up.

Depending where they are used, they can take a long time to break in. I have hit 100 hrs. On the VTA-120 amp I built that uses 4 of these and they still haven't fully broke in yet. I have seen as high as 300 hrs. To fully break in.

 

RE: Coupling capacitor burn-in, posted on February 10, 2017 at 08:28:53
Salectric
Audiophile

Posts: 1358
Location: East Coast
Joined: February 23, 2003
 You say this is an input coupling capacitor. Is there a resistor on the other side of the cap that goes from the capacitor output to ground? If so, there is no need to leave the amp on for the cap break in. Simply connect the source to the amp and let it play 24/7.

 

RE: Coupling capacitor burn-in, posted on February 12, 2017 at 03:14:38
KanedaK
Audiophile

Posts: 2519
Location: Brussels
Joined: April 27, 2010
 Well, after the caps there is a 50k volume pot, if I can read the board correctly :)

 

RE: Coupling capacitor burn-in, posted on February 12, 2017 at 03:54:29
Salectric
Audiophile

Posts: 1358
Location: East Coast
Joined: February 23, 2003
 The volume pot is fine. That means your input cap has a load on its output so it will break in just fine with an input source (like a CD player on repeat) whether the amp is powered up or not.

 

RE: Coupling capacitor burn-in, posted on February 12, 2017 at 16:42:58
KanedaK
Audiophile

Posts: 2519
Location: Brussels
Joined: April 27, 2010
 That's good to know! Thanks!
With 104dB sensitive speaker, passing any reasonable amount of signal trough those caps (they are at the power amp input, there s a preamp in the system) means EXTREMELY LOUD sound.
Now I know I can turn the preamp up and be at peace with the neighbors ^^

 

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