12-10-2012, 04:14 PM
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#1 |
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Registered User
Join Date: Mar 2005
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Noise when using power supply for pedal
I just picked up a Boss DS-1 recently as my first pedal. It seems to go through batteries pretty quickly so I picked up a power supply from Radio Shack. When I power it with the power supply it has very noticeable noise when activated, when I just use the battery it is fine.
Is the "official" power supply any better? Do I need a surge protector with some sort of filter?
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#9 Member of Alter bridge Rocks Club, PM Logz to join! |
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12-10-2012, 04:22 PM
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#2 |
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The Name's Devon! ;)
Join Date: Sep 2007
Location: Marrietta, Ohio, USA
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Have you tried it in different outlets?
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My Rig: Moser Bastard V - Pups: Bridge Epi Les Paul Standard - Pups: Bridge Neck Egnater Vengeance - JCA24S w/WGS Retro 30s - ZW-45 Crybaby - MXR 10-Band EQ - ISP Decimator (^Those are links^  )
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12-10-2012, 04:33 PM
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#3 |
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Registered User
Join Date: Mar 2005
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Not yet. It is currently in the socket next to the one my amp is in (same panel)
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12-10-2012, 04:47 PM
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#4 |
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The Name's Devon! ;)
Join Date: Sep 2007
Location: Marrietta, Ohio, USA
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Try using it in a different socket while keeping your amp in that same one if you can.
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My Rig: Moser Bastard V - Pups: Bridge Epi Les Paul Standard - Pups: Bridge Neck Egnater Vengeance - JCA24S w/WGS Retro 30s - ZW-45 Crybaby - MXR 10-Band EQ - ISP Decimator (^Those are links^ )
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12-10-2012, 05:35 PM
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#5 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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Do you have a tuner that will read off frequency? If the hum is 120Hz (close to a B2) then you are looking at poor filtering in the supply. If you have an android phone install gstrings, it should be able to tell you what it is. My guess is that it's just a cheaply made supply with crappy filtering and no regulation.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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12-10-2012, 11:39 PM
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#6 | |
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land of white cannibals
Join Date: Apr 2010
Location: deep south
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Quote:
i don't know where the OP is from but that would be 60hz in the states, right??? that would be a B1
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She loves it where she gets it But it's never felt the same Surgery, in the house of dissection When your candle burns out I'll resurrect you |
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12-11-2012, 12:28 AM
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#7 | |
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UG's Old Fart
Join Date: Apr 2004
Location: Earth
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Radioshack power supplies have piss poor filtering IME.
I mean REALLY PISS POOR filtering. Don't ever use them for effects. Get something made for effects. Like a Visual Sound 1 Spot.
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Programming is an art form that fights back. Quote:
My friends call me Rob. Last edited by CodeMonk : 12-11-2012 at 12:29 AM. |
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12-11-2012, 12:49 AM
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#8 | ||||
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UG's Frolestia
Join Date: Feb 2007
Location: Canterlot Bitches!
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Quote:
This, I had one way back when they hum like mother****ers.
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12-11-2012, 01:24 AM
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#9 | |
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Doesn't speak guitar
Join Date: Dec 2009
Location: Traffic Town LA
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Pick up a 1 spot. Cheap and has much better filtering.
Best bang for you $$
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Quote:
Last edited by R45VT : 12-11-2012 at 01:29 AM. |
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12-11-2012, 01:36 AM
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#10 |
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land of white cannibals
Join Date: Apr 2010
Location: deep south
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i too bought a radio shack adapter and it is IMO un-usable.
+1 for a 1 spot.
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Sunshine in the house of flames
She loves it where she gets it But it's never felt the same Surgery, in the house of dissection When your candle burns out I'll resurrect you |
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12-11-2012, 04:01 AM
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#11 | |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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Quote:
Once rectified the frequency doubles to 120Hz (unless it's REALLY shitty and only half waved rectified). If it's 60 Hz it isn't poor filtering, it's interference from outside sources.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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12-11-2012, 09:54 AM
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#12 |
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Registered User
Join Date: Mar 2005
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Thanks for the tips. I'm returning the Radio Shack power supply and I ordered a Dunlop ECB003 made for pedals.
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12-12-2012, 12:54 AM
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#13 | |
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land of white cannibals
Join Date: Apr 2010
Location: deep south
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Quote:
interesting. the [faulty] reasoning is that the US is 120w and 60hz, and i know its different in different countries (IIRC 240V in some places in Europe) i didn't know if that was it. but if it is doubling the frequency, where does the "60 cycle hum" come in? just wanting to learn. 
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Sunshine in the house of flames
She loves it where she gets it But it's never felt the same Surgery, in the house of dissection When your candle burns out I'll resurrect you |
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12-12-2012, 12:57 AM
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#14 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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60Hz hum is coming from shit induced from the mains which is 60Hz (there, 50Hz here). Once it passes through a full wave rectifier it turns into 120Hz. That's how you can be sure if the hum is coming from the DC supply. If it's 120Hz it's from after the rectifier, if it's 60Hz it's coming from before the rectifier.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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12-12-2012, 12:58 AM
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#15 | ||
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Don't even like pedals.
Join Date: Aug 2008
Location: Sydney
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Yup, +1 to all suggested for a new power supply. Having a power supply with a noise suppressor is essential. It's amazing how much cheap power supplies can create noise.
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12-12-2012, 01:01 AM
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#16 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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That's why I always build my own DC supplies. It's the only way I can be sure that everything is kosher. If I make it I can be certain there will be no audible 100Hz hum. The crap I've seen in a lot of commercially made DC supplies makes me want to
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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12-12-2012, 01:03 AM
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#17 | ||
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Don't even like pedals.
Join Date: Aug 2008
Location: Sydney
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It's pretty much forced me to sell some stuff to afford an Iso power supply. I've been using a behringer PSA for about 5 years now.
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12-12-2012, 01:05 AM
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#18 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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There's not much to a power supply. I started building them when I was 14 yo. LM317T - that's the ticket. You should give it a go.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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12-12-2012, 01:09 AM
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#19 | ||
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Don't even like pedals.
Join Date: Aug 2008
Location: Sydney
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Maybe. I'm not awful with a soldering iron, but I'm a terrible builder. Just looking around for a used ISO 5.
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12-12-2012, 01:15 AM
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#20 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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You may be overestimating the complexity of a power supply. Not counting the transformer and case a well regulated single output DC supply is literally 4 components if you use a LM7809 and six if you use a LM317T.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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