Power supply caps and choke placement/wiring

smog · 1822

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Offline smog

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on: September 01, 2017, 01:36:58 PM
Hi,

I've been having so much fun with my Crack.  I installed the Speedball, out with the stock volume pot for a blue velvet and swapped the rca jacks too.  I've replaced the output caps and final power supply cap with film, I also replaced the 5W resistor at 13/15L with a Hammond 158M choke.  Wasn't long before I got to bypassing the remaining power supply caps, those experiments led me to replacing the remaining two power supply caps with film.  Of course there wasn't enough room so I ran some wire and have these two larger film caps located outside the case.  That led to seeing what would happen if I replaced the final 5w resistor at 15/21U with another Hammond choke.  So, today I removed that 5w resistor and in its place hooked up two wires on the terminals and ran those placing this second choke outside of the case as well.

Ok, so the Question.  Would there be any problem if I just hooked this choke's wires directly to the proper lugs on the power caps instead of running their wires all the way to the terminals too?  I can't see why not but thought I'd better seek advice from people who actually know what they're talking about   :)

Another question, should I run a ground wire from the case to this choke as well?  Seems like a good idea. 

Thanks for any advice.

Here's a pic of how I have them set up



Offline Paul Birkeland

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Reply #1 on: September 01, 2017, 02:12:31 PM
When an animal or unsuspecting human visits your dwelling and tries to pick one of those up, you'll soon discover that there's a reason that all the electronic components in the stock kit are underneath the chassis plate.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline smog

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Reply #2 on: September 02, 2017, 02:56:33 AM
Thanks for the reply.  I went ahead and grounded the choke.  There are no kids or animals to worry about, just me  :)  If I decide I prefer these changes I would get to thinking of building a deeper base where I can secure the choke(s?) and caps with clamps.  Or some solution to make it safe, portable, and compact enough to fit on my rack.  Crack is still noise free so thankfully I havn't introduced any new noises.  I was worried these longer lengths of wire might be an issue was main reason I thought to just wire this choke right to the caps.  Thanks again.     



Offline David132

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Reply #3 on: November 05, 2017, 07:53:23 AM
I am also looking at modifications to my crack and had a scheme that located the output caps outside the box.  Is the voltage danger in the wire leads from the cap, or just touching any part of the capacitor, like the body of the cap?



Offline Paul Birkeland

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Reply #4 on: November 05, 2017, 08:18:41 AM
That depends a bit on the cap.  Some of them have one terminal connected to the body.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man