How to shield power adapters - Jemsite
Gear, Equipment, Recording & Off Topic Gear, Equipment, and Recording discussed here. Amps, pedals, whatever.

 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 06-27-2007, 09:32 AM Thread Starter
 
Join Date: May 2007
Posts: 637
Question How to shield power adapters

hey all

Right now on my pedal board i have a boss ds-1 and a gt-8. I want to build a case for them, and add more pedals and footswitches. There's one problem. When i put my ds-1 on, there's a ton of intereference, which is because i'm using a power adapter on the ds-1. How can i stop this interference?

thanks
yoyo1299 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 06-27-2007, 11:11 AM
 
jb4674's Avatar
 
Join Date: Apr 2002
Location: Fairfax, VA - USA
Posts: 4,612
Reviews: 18
Re: How to shield power adapters

Get a monster power pro 1000 power strip and plug your amp, DS-1 and GT-8 into it. If it doesn't work, you can always return it.

Jimmy
jb4674 is offline  
post #3 of 12 (permalink) Old 06-27-2007, 03:09 PM Thread Starter
 
Join Date: May 2007
Posts: 637
Re: How to shield power adapters

i don't think you get it. it's the adapters i'm using FOR my ds-1 that's making the hum
yoyo1299 is offline  
post #4 of 12 (permalink) Old 06-27-2007, 11:47 PM
 
ScottB's Avatar
 
Join Date: Dec 2001
Location: Pasadena, MD
Posts: 2,215
Re: How to shield power adapters

http://www.voodoolab.com/pedalpower_2.htm
ScottB is offline  
post #5 of 12 (permalink) Old 06-28-2007, 04:54 AM
 
Join Date: Feb 2001
Location: Oxford, UK
Posts: 1,514
Re: How to shield power adapters

I just want to through in a second opinion here...

In my experience all linear type regulated power supplies will always introduce noise into your signal chain and the amount of noise will be dependant on how noisey your mains electricity is... your boss adapter for example is a standard 9v linear regulated power suplly

The only way to get around this is to use a switch type power supply...
switch type power supllies come with their own pit-falls too... have a look here ...

http://en.wikipedia.org/wiki/Switched-mode_power_supply

Turns our lots of people are selling good quality 9v switch type power supplies.. and hence you should be able to get one for less than $10. Which will be less than 1/10th the cost of the Voodoo lab.
Devo is offline  
post #6 of 12 (permalink) Old 06-28-2007, 08:28 AM Thread Starter
 
Join Date: May 2007
Posts: 637
Re: How to shield power adapters

that's what i'm tlaking about Devo!! i DON'T WANT TO BUY AN SUPER EXPENSIVE PEDAL POWER! i just want to ellimate the hum from my power adapters. i don't need a voodoo power supply, i don't wnat one. i'm 14, i don't have cash to throw around like that

any other ideas?
yoyo1299 is offline  
post #7 of 12 (permalink) Old 06-28-2007, 09:17 AM
 
Join Date: Feb 2001
Location: Oxford, UK
Posts: 1,514
Re: How to shield power adapters

forgot to add that Im 99% sure your problem isnt shielding...

the reason for thinking this is that if the problem was bad enough that shielding was an issue then you would notice it in the guitar first before it would effect the power supply...

so, in my opinion, the only thing you can do is buy a power conditioner or a switch type power supply that isnt affected by line noise.

If you had a rack of equipment all being effected then a conditioner is the way to go... if you have a single pedal then investing in a new switch supply will solve it

conditioners are hundreds of dollars switch powersupplies are 10's or less...
Devo is offline  
post #8 of 12 (permalink) Old 06-28-2007, 09:41 AM Thread Starter
 
Join Date: May 2007
Posts: 637
Re: How to shield power adapters

ok, is there a specific type i need to get? If i got a nice power supply/surge protector, would that help at all?
yoyo1299 is offline  
post #9 of 12 (permalink) Old 06-28-2007, 11:30 AM
rgr
 
Join Date: Dec 2000
Location: Longmont, Colorado
Posts: 1,882
Re: How to shield power adapters

No, the problem is the filtering in the power supply. It doesn't matter how clean the AC going into the supply is, cheap power supplies don't filter the DC out enough to get rid of the ripple. Try a Visual Sound One Spot, it's relatively cheap and is a digital switching power supply. It won't get rid of 100% of the noise, but it's much better than 99% of the wall wart power supplies. Since it is a switcher, it's actually noisier than a regular wall wart, but the noise is outside of the range of the human ear, and probably alot of the circuitry of analog pedals. I use 2 One Spots and really like them, much quieter than the standard Boss power supplies for about the same price.
rgr is offline  
post #10 of 12 (permalink) Old 06-28-2007, 12:01 PM
 
jb4674's Avatar
 
Join Date: Apr 2002
Location: Fairfax, VA - USA
Posts: 4,612
Reviews: 18
Re: How to shield power adapters

I'd like to know more specifics about the issue. It sounds to me like he's getting hum from the power supply, which could be:

a) a bad power supply
b) a noisy AC line in yoyo's residence
c) a bad cable going to the DS-1 or bad cables between all effects

Yoyo, you need to identify the source of the problem first hand. Did your amp make the same noise before you put the effects in? if it did, then the problem is the AC line and you'll definintely need a power strip (not a vodoo or a brick) that will have filtering capabilities, so it can get rid of the noise.

If the amp didn't , then try playing your amp with the GT-8 alone first and see if you get the same noise. Then, try running the amp alone with the DS-1 and see what happens. If no noise is heard with the DS-1 alone, or the GT-8 alone, then you can eliminate the power supply from the equation. Do the same as above with different cables to see if you can find the culprit. If everything is still sounding ok, at that point, invest 50 bucks on a humX to see if it'll get rid of the noise. If the noise persists, return the humX, get a line conditioner and it should fix your problem.

Ground-related noises can be a major pain to deal with. Having worked with high end home and car stereo systems before, I can tell you that it's a process and you have to be patient and try to isolate the problem in order to fixt it. If I suggested the Monster Pro 1000 bar was because of the little information you provided and I still think that it would solve the problem. however, seeing as you're only 14 and have no money to fix the problem, the best suggestion I can tell you is to try to isolate the problem first and then try one solution at a time and if it doesn't work, you can always go back to the store and return it.

If you do decide to get a surge protector with filtering capabilities, check out the monster ones:

http://monstercable.com/productdisplay.asp?pin=2143

Please post back with your findings.

Jimmy
jb4674 is offline  
post #11 of 12 (permalink) Old 06-28-2007, 02:18 PM Thread Starter
 
Join Date: May 2007
Posts: 637
Re: How to shield power adapters

thanks a bunch guys

JB - my gt-8 does not make noise, only when i have the ds-1 in the chain does it make noise. it's not the amp. When i have the ds-1 off on bypass, there is no noise. When i click it on, there is noise, and the noise gets louder when i turn up the gain.
hope this helps....
btw, my dad has said he'll help me build a pedalboard, so i think he would be willing to put in some extra cash to elliminate that kinda stuff, so anything 50 and under will do. but of course, the cheaper, the better
yoyo1299 is offline  
post #12 of 12 (permalink) Old 06-28-2007, 02:23 PM
 
Join Date: Nov 2006
Location: Scotland
Posts: 446
Re: How to shield power adapters

The best you can get (though probably the most expensive) is the Pedal Power 2.
Gudster is offline  
Reply

Tags
pedal board , voodoo lab

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jemsite forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address

IMPORTANT: You will be required to activate your account so please ensure that your email address is correct.

If you do not receive your activation check your spam folder before using the CONTACT US form (at the bottom right of each page).



Email Address:
OR

Log-in











Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Power Adapters for a Pedal Board slugman Gear, Equipment, Recording & Off Topic 10 08-09-2007 08:57 PM
Power Amp to Power 16ohm 4x12 Cab guitarman13 Gear, Equipment, Recording & Off Topic 8 11-01-2006 08:50 PM
Pre and Power Amp Questions DotNetTim Gear, Equipment, Recording & Off Topic 0 05-08-2005 01:52 AM
AMP POWER - significance of watts mmr7 Tech: Setup, Repairs and Mods 15 08-25-2001 07:49 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome