Capacitor p0rn

[JamieMcC]

Well the planets must have been in alignment as a combination of trying and liking the Russian K75-10 Hybrid Paper and Polyethylene Terephthalate (Mylar) In Oil 2.2uf bypass used with the 100uf films in my Crack and then seeing a pic of Geary's own very interesting Crack build with the PIO caps in the choke thread really sparked my interest.

Then it happened I stumbled across some K75-40b 100uf PIO capacitors for $15 each including delivery from Lithuania. Curiosity got the better of me and I just had to give these behemoths a try. Worst case is they get relisted and I am out of pocket for a few dollars but man they going to give me one hell of a lot of entertainment value to try out in the Crack!

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.ebayimg.com%2Ft%2FK75-40B-PIO-Paper-In-Oil-TUB-capacitor-100uF-1000V-10-%2F00%2Fs%2FMTI1MFgxMDM2%2Fz%2Fah4AAOxyBvZTT3uu%2F%24_57.JPG&hash=f0b9e8bbada8733bb94ebf144cb2f03aade74e5d)

Geary's build

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FvTQTH1Q.jpg%3F1&hash=fd71624c092c659c987e45be9e15379be52ef8f7)

[corndog71]

Awesome!   How do they sound?

[Paul Birkeland]

You should put that cap next to a pop can, I bet the pop can is quite a bit smaller.

[JamieMcC]

I only purchased them yesterday so will need to wait around a week for delivery, the pic is the sellers ebay one. When they arrive will post a pic with a soda can for scale they will require a separate enclosure for sure.

[Grainger49]

I'm a big fan of those caps for two reasons, they are good sounding caps and they look so cool!

[JamieMcC]

Well top marks to the Lithuanian ebay seller the capacitors arrived today and I was really surprised they are a lot smaller than I had envisaged which is excellent news. Pics with a 6080 for scale

(https://www.head-fi.org/image/id/5966410/width/900/height/900/flags/LL)

(https://www.head-fi.org/image/id/5966411/width/900/height/900/flags/LL)

(https://www.head-fi.org/image/id/5966412/width/900/height/900/flags/LL)

(https://www.head-fi.org/image/id/5966414/width/900/height/900/flags/LL)

Hopefully I will have time to get them connected up for trial listen over the week end.

[JamieMcC]

Lazy Sunday morning here, Coffee, Croissants & honey + K75 Caps 

The K75 100uf's capacitors were hooked up yesterday and I am very please they have turned out to be a epic combination in the Crack. Its really surprised me because temporarily they are connected with some alligator clips and fly leads! I'm pondering on a more permanent solution while waiting on some more hook up wire.

At the moment my 100uf JFX films with the Teflon bypass are still all soldered in with the K75 100uf's just clipped into the circuit giving 210uf total twice the norm! So it will be interesting to see what changes when I take the 100uf JFX's out the Teflon will be staying.

Detail, tone, musicality, timbre, bass PRat all feel improved but what has surprised me the most is the increase in resolution new instruments backing singers and related venue noises on live recordings room/hall/ Cathedral ambiance, audience noise a whole bunch of new detail is coming through for the first time, its a engaging listen with the T1's and made for a late night yesterday as the one more track kept going into the small hours,

(https://www.head-fi.org/image/id/5973001/width/900/height/900/flags/LL)

(https://www.head-fi.org/image/id/5973003/width/900/height/900/flags/LL)

(https://www.head-fi.org/image/id/5973004/width/900/height/900/flags/LL)

edit added for scale

(https://www.head-fi.org/image/id/5973078/width/900/height/900/flags/LL)

[xcoolhandx]

how does it sound ..?

[JamieMcC]

how does it sound ..?

Easily the best to date.

[galyons]

how does it sound ..?

Easily the best to date.

Jamie,
They will need a good bit of burn in.  One they have settled down, you might try a bypass cap of about .1uf, (PIO, film/foil), for the high frequencies. My experience with K75's is that they are marvelous in the mid range.  This is not exactly a neutral cap.  That wonderful mid range is euphoric coloring.  (That is really enjoyable if you don't want purist neutrality!) But they need some help at the high frequencies.  I have no experience with these high capacitance Hulks, (most I have used is 10uF).  But I have found the higher the capacitance of the K75, the more the need to add a little high frequency kick.

Cheers,
Geary

[JamieMcC]

Jeary thanks and noted, the capacitors had been removed from some radio equipment so am hoping any burn in required will be brief I'm intending to keep the 10uf teflons in place the resolution of the k75 + Teflon is very good better than the jfx 100uf films+Teflon.  It will be interesting to see how the k75's are to live with longer term, if that engaging musicality they deliver grows tiring or not.

Cheers

 Jamie

[mcandmar]

I got my hands on three of these Solen 630v 33uf poly caps on eBay for £6.  I thought they would be perfect to replace the two final 22uf lytics, or bypass the 100uf caps in the main power supply. Only issue is they are 45x65mm so i cant physically fit them in anywhere

[JamieMcC]

Mark I couldn't resist trying out some 1uf Hovland Supercaps courtesy of ebay also.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.ebayimg.com%2Ft%2FHovland-Supercap-1uf-400vdc-audio-capacitors-%2F00%2Fs%2FMTYwMFgxMjAw%2Fz%2FYP4AAOxyi-ZTbT-2%2F%24_1.JPG&hash=a13d7c1073ba65f981d7ff1c20d3f96ea3f9c71d)

[mcandmar]

Certainly a name i have heard of, are you going to use them in the audio path or power supply?

Found these today which are interesting, 100uf metalized polypropylene tubs..  http://www.ebay.co.uk/itm/291127472802

[JamieMcC]

I will give them a try out as a bypass in the audio. I've also been pondering over these Icar 200uf caps for the power supply price is really good for experimenting but the shipping hurts!

http://www.ebay.co.uk/itm/230968898220?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649