Bottlehead Kits > Crack
Modded Crack - add bypass cap, choke and Cree diodes
ALL212:
Inspired by other posts but recently by richmi in the gallery:
I replaced the last 270 ohm resistor with the Triad C-7x and "tipped" the last cap with a 1uf Clarity Cap. Hope to add the Cree diode in there someday but for now this will do.
I got lucky on the mounting hardware as being a packrat sometimes pays off. I had the screws and standoffs already in my possession and just had to add the holes to the chassis. I'm going to see if I can find more of those (they come from a dual monitor stand we use at our offices) and if so, will offer up what I find here.
Need some time to listen but no smoke on power up so we're going forward!
From the front:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2857_zps91vmy66g.jpg&hash=51b25b484fcef4ca4d55c400ec294345d7cbbda8)
From the back:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2860_zpsoellrn36.jpg&hash=9650979b46c7272762111615063b4bb43f937bb8)
Full underside:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2862_zpsfbf0qsdd.jpg&hash=a9d1f47c1fa37659261924d67e18a22f3a2ec279)
From the top - new holes just above the t'former holes and a bit to the left. Transformer holes are 1/4" too close together to use.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2866_zpsij6shnif.jpg&hash=5787f5fc435614dc64be42f9c37018c44fc47304)
ALL212:
Further upgrades following member Richmi:
Cree diode board added. I didn't drill anything and I think it was Lee Hankins that just let it hang on the wires but I superglued a standoff and then wired it so it already sat correctly on the standoff - then superglued it to the standoff. Kindof a combination of both. If the superglue does let go it won't go anywhere as the wires have it.
I used the "recliner" look for soldering them to the board:
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2870_zpsnrrddccm.jpg&hash=5f58a8b5130ef49cd627da736739ac64f2553eb1)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi905.photobucket.com%2Falbums%2Fac253%2Fall212212%2FDSC_2872_zps3umi7s1f.jpg&hash=f49bbc999fc67a746f7616dc95b4d80082db3a00)
Smoothed the overall sound out very nicely. Bass is noticeably better, darker background.
Nice! Thanks guys.
Nathan:
I'm interested in installing the choke too but as you've noted, real estate under the hood is tight if there's much in the way of mods and I suspect that a choke is not a typical builder's first mods
ALL212:
If you have the speedball installed what I did comes in just short of the depth of the speedball. The fun part is figuring out how to mount that and then grabbing a drill and hitting your top plate. The unsoldering/soldering portion isn't to bad.
If you are a beginner stay away from the Cree diodes - that nice shiny part with the hole in it is hot and I'm guessing if you ground those out some magic smoke could be released.
i luvmusic 2:
After you installed the CREE DIODES did you noticed any difference in sound?
Thanks
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