Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sat Nov 23, 2024 11:55 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 16 posts ] 
Author Message
PostPosted: Fri Apr 19, 2013 10:14 am 
Offline
Cocobolo
Cocobolo

Joined: Sat Apr 28, 2012 7:27 pm
Posts: 277
First name: James
Last Name: Greene
State: Maine
Focus: Build
Status: Semi-pro
Anyone always use shielded wire for the output jack on your guitars? Anyone ever omit it and use regular 22 guage (or similar) wire?

I've never quite understood why the wiring to the output jack needs to be special shielded wire while the rest of the electronics all use regular wiring.

I have used typical wire on a few guitars and shielded wire on a few. Never noticed any differences between any of them.


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 11:12 am 
Offline
Koa
Koa
User avatar

Joined: Mon Feb 07, 2011 8:15 pm
Posts: 529
First name: Mark
Last Name: Sorrentino
Focus: Build
Status: Amateur
I do not use shielded wire. I use two wires and twist them in a spiral which produces a hum cancelling effect. Not the same effect that a humbucker produces, but helps none the less. Shielded wire is a pain anyway.

_________________
http://www.tinyhouseandland.com


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 11:38 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Sun Mar 06, 2011 12:04 am
Posts: 5821
First name: Chris
Last Name: Pile
City: Wichita
State: Kansas
Country: Good old US of A
Focus: Repair
Status: Professional
Quote:
I use two wires and twist them in a spiral which produces a hum cancelling effect.


You are kidding yourself.

_________________
"Act your age, not your shoe size" - Prince


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 12:34 pm 
Offline
Koa
Koa

Joined: Sat Apr 19, 2008 10:08 pm
Posts: 1958
Location: Missouri
First name: Patrick
Last Name: Hanna
State: Missouri
Country: USA
I'm no expert, but I used shielded wire on my acoustic-electric archtop and would do so on any similar guitars that I build. It's a very quiet, clean sounding instrument.
Patrick


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 2:29 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Fri Jan 15, 2010 3:34 pm
Posts: 2047
First name: Stuart
Last Name: Gort
Country: USA
Focus: Build
Status: Semi-pro
I don't use shielding on either the wire in the electronics cavity or around the inside of the cavity itself. Honesty? I think a lot of builders take the idea of shielding to irrational extremes...given the number of other uncontrollable ways in which RF ends up in a signal chain. I suppose it can't hurt to do it but I'm of the opinion that the most likely point at which RF is going to be introduced into the the signal chain is in the pickup windings. I make a unique pickup ring that results in the entire coil(s) being surrounded by metal...which I take the trouble to ground. My guitars are very clean.

Make clean soldering connections, use quality wire and components, and use a well made guitar cable. I'm not sure going past that point returns a benefit anywhere near equal to the hassle.

_________________
I read Emerson on the can. A foolish consistency is the hobgoblin of little minds...true...but a consistent reading of Emerson has its uses nevertheless.

StuMusic


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 5:43 pm 
Offline
Mahogany
Mahogany
User avatar

Joined: Thu Mar 14, 2013 3:23 pm
Posts: 51
First name: Derek
Last Name: Dowding
City: Wallsend
State: NSW
Zip/Postal Code: 2287
Country: Australia
Focus: Build
Status: Amateur
Chris Pile wrote:
Quote:
I use two wires and twist them in a spiral which produces a hum cancelling effect.


You are kidding yourself.


My electronics guru told me this tip years ago and I have always twisted wherever I was unable to shield. Are you saying it's been all for nothing? Way to make a bloke feel bitter and TWISTED! gaah

_________________
I've got a mind like a steel......whatsername!!?


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 7:10 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri May 18, 2012 8:35 pm
Posts: 2660
Location: Austin, Texas
First name: Dan
Last Name: Smith
City: Round Rock
State: TX
Zip/Postal Code: 78681
Country: USA
Focus: Build
Status: Amateur
Dekka wrote:
Chris Pile wrote:
Quote:
I use two wires and twist them in a spiral which produces a hum cancelling effect.


You are kidding yourself.


My electronics guru told me this tip years ago and I have always twisted wherever I was unable to shield. Are you saying it's been all for nothing? Way to make a bloke feel bitter and TWISTED! gaah

Not trying to be a smart-alec, but twisted wires can suppress noise and hum. It's called a common-mode filter. Look it up.
http://en.wikipedia.org/wiki/Twisted_pair

_________________
wah
Wah-wah-wah-wah
Wah


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 9:38 pm 
Offline
Koa
Koa
User avatar

Joined: Mon Feb 07, 2011 8:15 pm
Posts: 529
First name: Mark
Last Name: Sorrentino
Focus: Build
Status: Amateur
I got the tip from Ron Kirn. Makes sense to me why it would help. He suggests only twisting the hot and ground leads which connect to the output jack.

_________________
http://www.tinyhouseandland.com


Top
 Profile  
 
PostPosted: Fri Apr 19, 2013 10:12 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Fri Jan 15, 2010 3:34 pm
Posts: 2047
First name: Stuart
Last Name: Gort
Country: USA
Focus: Build
Status: Semi-pro
dzsmith wrote:
Not trying to be a smart-alec, but twisted wires can suppress noise and hum. It's called a common-mode filter. Look it up.
http://en.wikipedia.org/wiki/Twisted_pair



Yes...in balanced pair operation.

In a pickup lead, grounded shielding will eliminate the need for other measures and inside the wiring cavity there is no balanced pair operation.

Twist the hot and ground from the jack? Even a cursory reading of the subject reveals variables that aren't being accounted for in this discussion....and couldn't be accounted for by arbitrarily twisting the jack leads. Read the "disadvantages" section in the Wikipedia link. It's a persnickety process with limited applications.

The question is: has anyone ever not twisted jack leads and then resoldered the twisted leads.....and then compared the two.....and noticed a difference? C'mon.

_________________
I read Emerson on the can. A foolish consistency is the hobgoblin of little minds...true...but a consistent reading of Emerson has its uses nevertheless.

StuMusic


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 1:27 am 
Offline
Mahogany
Mahogany

Joined: Fri Jan 14, 2011 1:57 am
Posts: 52
First name: Daniel
Last Name: Wotton
City: Old Toongabbie
State: NSW
Zip/Postal Code: 2146
Country: Australia
Focus: Build
Status: Semi-pro
Test? We are talking about guitars here.Anecdotal evidence and half understood historical truths are enough for me. beehive


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 1:57 am 
Offline
Mahogany
Mahogany
User avatar

Joined: Thu Mar 14, 2013 3:23 pm
Posts: 51
First name: Derek
Last Name: Dowding
City: Wallsend
State: NSW
Zip/Postal Code: 2287
Country: Australia
Focus: Build
Status: Amateur
Filippo Morelli wrote:
Zlurgh wrote:
The question is: has anyone ever not twisted jack leads and then resoldered the twisted leads.....and then compared the two.....and noticed a difference? C'mon.

What? You mean test?!

Filippo


Years ago, I made this bass out of recycled stuff with a homemade pickup and vintage cloth-covered wire (because that was all I had on hand). When I plugged it in for the first time it hummed badly. In despair, I took it to my electronics-savvy mate assuming my dodgy DIY pup that was at fault. I made the body completely hollow with no shielding at all. He suggested that before I built a new pickup I should twist together the long wires that ran to the pots all the way up on the top horn. When I did almost all of the hum disappeared. Later replacing the pup with a commercial one silenced the beast totally. I didn't wear a white lab-coat while I did it but I reckon this meets the 'test' criteria.


You do not have the required permissions to view the files attached to this post.

_________________
I've got a mind like a steel......whatsername!!?


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 9:59 am 
Offline
Cocobolo
Cocobolo

Joined: Sat Apr 28, 2012 7:27 pm
Posts: 277
First name: James
Last Name: Greene
State: Maine
Focus: Build
Status: Semi-pro
Dekka wrote:
Filippo Morelli wrote:
Zlurgh wrote:
The question is: has anyone ever not twisted jack leads and then resoldered the twisted leads.....and then compared the two.....and noticed a difference? C'mon.

What? You mean test?!

Filippo


Years ago, I made this bass out of recycled stuff with a homemade pickup and vintage cloth-covered wire (because that was all I had on hand). When I plugged it in for the first time it hummed badly. In despair, I took it to my electronics-savvy mate assuming my dodgy DIY pup that was at fault. I made the body completely hollow with no shielding at all. He suggested that before I built a new pickup I should twist together the long wires that ran to the pots all the way up on the top horn. When I did almost all of the hum disappeared. Later replacing the pup with a commercial one silenced the beast totally. I didn't wear a white lab-coat while I did it but I reckon this meets the 'test' criteria.


Very beautiful and unique bass you have there. Do the strings enter from the tail end of the body or through the back side?


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 10:38 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Sun Mar 06, 2011 12:04 am
Posts: 5821
First name: Chris
Last Name: Pile
City: Wichita
State: Kansas
Country: Good old US of A
Focus: Repair
Status: Professional
Quote:
Not trying to be a smart-alec, but twisted wires can suppress noise and hum. It's called a common-mode filter. Look it up.



Apparently you are confusing the difference between hum and noise.
I don't care how long or how well the wires are twisted, they WILL NOT remove the 60 cycle hum of a single coil pickup.

I may be splitting hairs, folks - but I'm not wrong about this.

_________________
"Act your age, not your shoe size" - Prince


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 5:47 pm 
Offline
Mahogany
Mahogany
User avatar

Joined: Thu Mar 14, 2013 3:23 pm
Posts: 51
First name: Derek
Last Name: Dowding
City: Wallsend
State: NSW
Zip/Postal Code: 2287
Country: Australia
Focus: Build
Status: Amateur
Dekka wrote:
Very beautiful and unique bass you have there. Do the strings enter from the tail end of the body or through the back side?


Four ferrules embedded in the tail.

_________________
I've got a mind like a steel......whatsername!!?


Top
 Profile  
 
PostPosted: Sat Apr 20, 2013 7:35 pm 
Offline
Koa
Koa
User avatar

Joined: Mon Feb 07, 2011 8:15 pm
Posts: 529
First name: Mark
Last Name: Sorrentino
Focus: Build
Status: Amateur
nutsdan wrote:
Test? We are talking about guitars here.Anecdotal evidence and half understood historical truths are enough for me. beehive


I just remembered, if you use Brazillian rosewood for the entire body, it will cancel hum. Something about gamma rays.

_________________
http://www.tinyhouseandland.com


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 21 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com