Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Downhome Upstate on November 16, 2013, 12:03:54 PM

Title: Revisiting Crack
Post by: Downhome Upstate on November 16, 2013, 12:03:54 PM
Getting started
Title: Re: Revisiting Crack
Post by: Downhome Upstate on November 16, 2013, 01:10:04 PM
Some in-process pics.  Substituted 450V Nichicon KX 'Standard Audio' electrolytics in the PSU. They are bigger than the stock caps, and so I added a terminal strip.
Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 01:54:35 AM
Substituting a British phone jack, made by Cliff, for the Neutrik stock jack. Looks like this one has better quality contacts. See http://www.cliffuk.co.uk/products/jacksockets/index.htm

Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 01:56:21 AM
For $27 or so, the PEC pot looks pretty good.

Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 02:01:22 AM
Substituted Belden 8450 2-wire solid core shielded (as used in the Stereomour) for the 3-wire braid, and grounded the drain wire at the pot (the load), per PB.   8)

Title: Re: Revisiting Crack
Post by: Paul Birkeland on November 19, 2013, 07:36:10 AM
I dig the white plastic headphone jack, nice find!

On the PEC pot, the bottom 1/4 of the rotation of the pot tends to have an unusual amount of channel imbalance, so I would plan on needing to add some padding resistors once the build is complete.
Title: Re: Revisiting Crack
Post by: Doc B. on November 19, 2013, 12:14:01 PM
Just need white shoes and belt to go with it. And a white hat.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.cdn.turner.com%2Fdr%2Fgolf%2Fwww%2Frelease%2Fsites%2Fdefault%2Ffiles%2Fimagecache%2Fnode-gallery-display%2Fgallery_images%2FDustin-Johnson-Apparel_400x600_0.jpg&hash=4d03d6416d0ec82508a21ed62d88d95fea2aa330)
Title: Re: Revisiting Crack
Post by: Downhome Upstate on November 19, 2013, 01:13:31 PM
I dig the white plastic headphone jack, nice find!

On the PEC pot, the bottom 1/4 of the rotation of the pot tends to have an unusual amount of channel imbalance, so I would plan on needing to add some padding resistors once the build is complete.

Thanks for the tip, Paul!  Any hints on values?
Title: Re: Revisiting Crack
Post by: Downhome Upstate on November 19, 2013, 01:14:59 PM
Just need white shoes and belt to go with it. And a white hat.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.cdn.turner.com%2Fdr%2Fgolf%2Fwww%2Frelease%2Fsites%2Fdefault%2Ffiles%2Fimagecache%2Fnode-gallery-display%2Fgallery_images%2FDustin-Johnson-Apparel_400x600_0.jpg&hash=4d03d6416d0ec82508a21ed62d88d95fea2aa330)

Add some liquid refreshment, and all's right with the world.

Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 01:17:26 PM
Another cheap and cheerful tweak: a Belton octal socket.

Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 01:21:03 PM
This probably wasn't worth the 5 bucks: a glazed ceramic 9-pin socket with gold-plated pins (can't be very thick gold plate for the $3 to $4 extra over the plain old ceramic socket, but what the hell).

It looks nice next to the white phone jack while you're wearing your white shoes, white belt, and white hat.   ;D

 
Title: Crack journal
Post by: Downhome Upstate on November 19, 2013, 01:24:35 PM
Last bit of nonsense for the day:  Cardas CTFA RCAs.

FWIW, I think I like the pcx house-brand (Connex) Tiffany's better. At least the Connex RCAs have nuts on the outside and the inside, so you don't have to go back in and re-tighten the jacks.

Title: Crack journal
Post by: Downhome Upstate on November 20, 2013, 12:24:34 AM
A minor extravagance: silver wire (and teflon tubing). Handmade Electronics has this for $1.75/ft.

Title: Crack journal
Post by: Downhome Upstate on November 21, 2013, 02:08:00 PM
Using the 24 gauge soft-annealed silver wire for signal wiring, and the 20 ga. silver for grounds. Taking my sweet time, a few small steps a night.

Title: Crack journal
Post by: Downhome Upstate on November 21, 2013, 02:09:13 PM
More of the same . . .


Title: Crack journal
Post by: Downhome Upstate on November 22, 2013, 01:51:12 AM
 ::)  A sign of the need for professional help, or too much time on my hands:

Havin' a good time cleaning a terminal strip.  Where is my life, anyway? I know I left it around here somewhere . . .



Title: Crack journal
Post by: Downhome Upstate on November 27, 2013, 04:04:28 PM
All done. All signal wiring in silver/teflon, and Speedball boards back in. Bypassed the Dayton film caps with .01 uf FT-3's  Even with the 'stock' tubes, this thing sings thru' the HD600's No Sennheiser veil to my ears. Great detail, more air around voices and instruments, fingers on strings, long woody decay on bowed bass notes, great tone, the whole enchilada. The soundstage is surprisingly wide, and imaging spot on. I know this sounds unlikely, but I recently auditioned the Audeze LCD-X's on the Wu SA6-SE amp, and the Crack w/HD600's is a contender. Righteous, Paul.
Title: Re: Revisiting Crack
Post by: Grainger49 on November 28, 2013, 01:42:18 AM
This looks like a good sippin' whiskey project.  You work and sip till you feel the effect of the whiskey, then stop and go listen to music.

It is a true labor of love.