Built a Crack this weekend... couldn't build it stock though :)

vanofmonks · 3724

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Offline vanofmonks

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Replaced the final PS Resistor with a choke.  Put c4s's on th driver tube.  Added a crossfeed circuit.  The crossfeed doesn't seem to do anything, and it seems to have only about a 2k input impedance.  So i'm not sure if I screwed it up.  It still sounds awesome.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg697.imageshack.us%2Fimg697%2F420%2Fcrackbottom1.jpg&hash=3fbee569a92b4acd729c817bf7cff4f69d314bb0)


(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg227.imageshack.us%2Fimg227%2F1745%2Fcrackbottom2.jpg&hash=f5de73954e6c4d42721fcd0b28625825b3afb10c)


(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg94.imageshack.us%2Fimg94%2F4862%2Fcracktop.jpg&hash=9e06537463800d1094b79ba5e60ea7fd691ba200)
Chris



Offline Paul Birkeland

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Which choke did you end up going with?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline vanofmonks

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The same one that is in the Paramour 1 with the transformer with the solder tabs.  That one is actually from one of my old paramours (thats why its painted).  It has a 270 ohm or so DCR with 10 H.  I think it is a triad c7x if I remember right.



Offline Paul Birkeland

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I think it is a triad c7x if I remember right.

Perfect!  Are you using a CLC supply?  I ask because I stated that it is likely quiet enough to have 220uf-> 10H -> 220uf (or 440uf if you double up), but I have yet to try it.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline ironbut

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CB,
Speaking of PS's, how did your experiment with the OD3(?) go? I like the creamy texture glow tubes give to some amps but sometimes it's a little too much for my taste.

steve koto


Offline vanofmonks

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I'm running it CRCLC.  Just replaced the resistor between 13 and 15 with the choke.