Burn-in Rig Before Battle -

Burn-in Rig Before Battle

by Auw Jimmy
May 16, 2010
DIY Audio
31

I plan to compare some capacitors from Jensen and one from Audio Note. The two from Jensen are Jensen Copper Foil Paper-in-Oil (Paper Tube) and Jensen Copper Foil Paper-in-Oil (Copper Tube). From Audio Note, I have Copper Foil Mylar-in-Oil (I believe this is Copper Tube also). We gonna have a serious battle later since those 3 caps are using different “recipe”. Both Jensen are Paper in Oil type, but with different enclosure. While the Audio Note has similarity with one of the Jensen with Copper Tube, but with Mylar instead of Paper. Audio Note claims the Mylar will provide better combination between sonic reproduction and the reliability.

Shall we prove the result? Later… We must wait after the burn-in session, probably in 100+ hours.

For the burn-in session, I sealed the Copper Tube caps with plastic. This is to prevent the oxidation of the copper tube (both Audio Note and Jensen Copper Tube oxides very fast in my environment due to high humidity, thanks to the purity of the material used also). I should prepare a transparent heatshrink for a good looking appearance, but no time to find one now. Perhaps you will ask why there are 2 pair of Jensen Paper Tube? One is my friend’s, to join the burn-in session before used on his system.

The burn-in rig, with my Aikido pre-amp. The Duelund CAST Ag are still used as my main coupling.

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Auw Jimmy

Article Comments

SS Wong
May 17, 2010 09:04

the coper casing will oxsidize fast. another way is use clear vanish spray to make a coating.

heard a friend say v cap cutf is comparable to duelund cast pio.
Jimmy Auw
May 17, 2010 09:27

Hi Wong,
Yes true. I have bad experience with such chassis. Clear spray is a good idea, but I dont really like to add that to my caps, unless really necessary.

Have anyone held a head-to-head comparison, yet? Or just “heard” in two different system which hard to judge at this level, since I believe both will sound superb.

Thanks.
Chandra
May 19, 2010 06:56

Wah, menunggu dengan sabar hasil reviewnya P. Jim. Untuk heatshrink transparan yang agak gede apakah sudah lihat di http://www.kaskus.us/showthread.php?t=3643412
Jimmy Auw
May 19, 2010 21:43

Sudah lihat Pak, yang jual salah satu rekan milis juga hehehe.
Thanks atas infonya.
Yadi
May 20, 2010 08:20

Selamat Ulang Tahun Bang JA ! Hidup DIY-AUDIO !
Jimmy Auw
May 20, 2010 09:32

Loh saya gak ulang tahun loh…
SS Wong
May 20, 2010 10:51

I only have chance to try the cap below in my system but the value of uF is slightly deferent, location is the coupling cap between driver and power tube. i’m using 1626 to drive 300B.

1)Jensen 0.33uf cu foil-PIO (al casing)
2)AN 0.33 cu Foil mylar in oil
3)V cap tftf 0.1uf
4)V Cap tftf 0.1uf + 0.39 jensen Al foil-PIO
5)0.39UF AL Foil-PIO
6) OBLIGATOR 0.33 & AURICAP 0.22

I believe u very familiar with jensen cu foil pio (al casing) so we just use this as a standard comparison.

Basically i found the best sounding is 01.uf vcap tftf + 0.39 jensen al pio as it have the transparent,dynamic, fast bast,sound stage and detail of vcap plus the warm,musical feeling of jensen/pio taste.

AN mylar to me is like in between of jensen cu pio and v cap. it is more neutral and transparent than jensen cu pio, but to me it is not as musical and warm as jensen, also not as detail, dynamic as v cap.
Jimmy Auw
May 20, 2010 10:59

Hi Wong,
I’m not suprised with the result. I have already explained (on my Capacitor Battle Comparison article) that for 300B system, most likely VCap TFTF would be the real champion.

300B sounds too warm and slightly dull for most of the time, and with the “superb detail” and “slightly cold sound” of VCap TFTF, the winner is clearly defined before the battle has begun.

But VCap alone sometime felt too cold, so additional Jensen will give enough warm side and very good to balance its sound. Well, YMMV.

So at then end, the result was just as we predicted 🙂

Thanks.
SS Wong
May 20, 2010 12:38

Dear Jimmy,

You are right. Vcap is bit cold by adding AL pio better feel. one of my friend also prefer 0.01uf vcap tftf + ~0.33 ampohm pio.

Anyway cutf seems a new replacement can be consider. Several people around here had use it, and claim that it if far better than tftf, some even claim that it is at duelund cast pio’s level.
Jimmy Auw
May 20, 2010 13:15

Hi Wong,
Yes Copper with Teflon should be a good deal.

It’s better than TFTF and I have no doubt about it 🙂

But currently I’m enjoying the Cast Ag. And if it’s just at Cast PIO (I believe at Cu) level… well perhaps it can wait later 🙂

Anyway, they don’t have size larger than 0.33uF currently, right?

Thanks.
SS Wong
May 21, 2010 12:57

Waiting for your full report on duelund silver cast pio : )

I think you dont need CUTF, just wait for anotehr several years who know they will have Silver TF.
Jimmy Auw
May 22, 2010 23:49

Ha~~~,
I don’t think they will have AgTF soon, since the market is damned low. Even older player like Jensen and AudioNote didn’t selling Silver material that much.

Later, if I have extra bucks, perhaps I will try CuTF. There is always place for such great caps. But currently, Duelund CAST Ag is my reference.

Thanks.
Gary
June 7, 2010 10:40

Hello Jimmy,
I am rebuilding a set of Ampex 350 preamps and there are 5 of the .10uf caps in the signal path.
The amps have 5-ea..12sj7 octal tubes,1..ea 6j5
and 2ea..6f6 all octal very nice sounding.
My question is what cap in this value would you use besides duelund,v-cap.I like very nice midrange and sparkle high but natural and defined no smearing have room for 25x55mm size in case or somewhat larger.Mundorf SO or SGO ,AN copper in mylar?Jenson cu in au?
All the above caps are usable .Teflon Relcap TFT?

Teflon too sterile in octal tube preamp?

Thanks,
Gary
Jimmy Auw
June 7, 2010 21:52

Hi,
You can try Jensen Paper Tube.

Thanks.
Gary
June 8, 2010 05:01

Hi Jimmy,
I purchased combination of Mundorf supreme,silver oil and gold oil.Have had real good luck with them in electronic circuits and signal path.Euro to dollar exchange rate too good to pass up as there are total of 28 caps for each amp.

Thanks for recommendation.

Best,
Gary
Fabrizio
June 11, 2010 16:27

Hi Jimmy,

Any news? I’m waiting for the battle results.
Thank you in advance
Mike
June 15, 2010 16:25

Jimmy,

Your killing us with the wait. . . I keep checking your website and no comparisons. . . when are you going to post your findings?. . .we are waiting (not so) patiently . . .;-)

I look forward to your results! BTW I love many of your capacitor comparison tests! Thanks for supporting the DIY community . . . now about those capacitor comparisons . . .;-)

Mike
Jimmy Auw
June 15, 2010 21:44

Hi,
Sorry quite busy later these days so I didn’t even have enough time to listen the music.

Just be patient and wait some more. Since most likely this hobby drains my pocket quite fast, so I need to compensate by working harder to earn more ha~~~…

Sorry to keep you waiting, but I think you must wait a little bit longer…. sigh… sorry for that…

Thanks.
Mike
June 17, 2010 01:00

Jimmy, Thanks for the response.

I will indeed be more patient. . . 🙂 Sounds like you have been very busy. . . take care of yourself and don’t work too hard . . .

We did pick a hobby that can quickly drain our financial resources . . . especially those Duelund caps!

Thanks again and I look forward to your results!

Regards,

Mike
Anchorage, Alaska
Jimmy Auw
June 18, 2010 22:34

Hi Mike,
thanks!
Marc5036
June 25, 2010 00:21

Hi Jimmy,

Can you give me the size of your 1uF duelund cast dc silver 630V please?

thanks.

Marc
Tyo
June 26, 2010 02:03

Belum ada report-nya nich boss Jim? Penasaran nih hasilnya….hehe
Jimmy Auw
June 28, 2010 22:18

Hi Marc,
About the same with the Cu version.
Thanks.
Jimmy Auw
June 28, 2010 22:18

He he he… masih lama, lagi sibuk belum ada waktu enjoy ngetest-nya.
Thanks.
Jason
July 22, 2010 18:53

Hey Jimmy, any updates on the shoot-out?

I am about to buy 2 pairs of caps and am very interested in the new copper body Jensen vs. Audio Note UK.

Thanks Jason
Jimmy Auw
July 23, 2010 22:51

Hi Jason,
No not yet. About to do that in next few weeks. Got some free time soon (hope so).
Thanks.
jarkko
February 26, 2011 15:16

Hi Jimmy

I have recently modified my leben cs660p by changing capasitors to jensen PIO paper tube. Do you have any experience how long the burn in will take? Or what kind of differences it makes between “raw” and burnt in PIO?

best regards
Jarkko
finland
Auw Jimmy
February 26, 2011 22:21

Hi Jarkko,
It may takes around 50-200 hours. The sound at initial hours will be less dynamic, not yet spacious, and less on the high end tone.
Thanks.
Vick
November 20, 2015 12:50

Pak Jimmy,

Salam kenal. Saya numpang tanya, kapasitor 1uf 250V merek jensen bisa beli dari anda 2pcs?

Terima kasih

Vick
Auw Jimmy
November 23, 2015 08:21

Hi Vick,
Saya sudah reply di email ya.
Thanks.