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burning in capacitors for phono stages

I'm in the process of auditioning various capacitors within my phono preamp. It seems burn in is a 'real' issue with caps. In exploring various means to burn in these caps I found the KAB PreconLP, this device converts line level signals to phono level signals. This allows one to use a cd player and burn in disc to burn in phono stages.

I only need substitute various caps in circuit I want to audition. This seems like a huge advantage over any other cap burn in method I've encountered. You are getting the actual signal your cap will see playing lps. Other burn in methods I've seen may or may not have sufficient voltage and/or combo of AC and DC.
sns
rodman99999
3,557 posts
 
Here's something else that might interest you: (http://www.geocities.com/rjm003.geo/rjmaudio/diy_rack.html)
sns OP
653 posts
 
Thanks for the info Rodman. I'm using the burn in scheme suggested by Johnss. We'll see how that works.
rodman99999
3,557 posts
 
Sns- There won't be nearly enough voltage to burn the caps in overnight that way(especially with poly-s, poly-p or Teflon caps), but- it would work eventually. Happy experimenting.
sns OP
653 posts
 
Rodman, I'm burning them in for aprox. 150 hours. I've heard in speaker crossovers the V Caps can take 400 or more hours to fully burn in. Eventually, I will get around to building the burn in scheme you suggested. Thanks again.
ptmconsulting
1,000 posts
 
Just make that capacitor bundle with a male RCA on one end and a female RCA on the other. Plug it into the back of your CD player and run an interconnect between the other end and your preamp. Run the CD player for 100 hours and you've got burn in (200 hours for teflon's). You don't even need the preamp to be turned on at all.

Enjoy,
Bob
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