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Fresh_Start
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« on: July 09, 2007, 05:06:24 pm » |
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I was about to throw out two old cordless phones when it occurred to me that the wall warts might work as power supplies for pedals. Both are 120vac to 9vdc. One 350mA, the other 500mA. "Class 2 Power Supply" on bodies. It looks like the tip is ground and the sleave is positive from icons on each.
So, can I use these to power one or more pedals? Nothing fancy - a basic CryBaby, Guyatone Tremelo, etc.
Chip
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We have proven once again no plan survives contact with the enemy, or in this case, with the amp. Plan to be wrong about something. |
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EKDENTON
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« Reply #1 on: July 10, 2007, 04:36:07 pm » |
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Some one gave me a packard bell wall wart that is a 1 amp. I think it used to be a phone supply.
I had to cutt the wires and reverse the polarity. I checked it on my scope and it has pretty smooth dc. works good on my pedals anyway.
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« Last Edit: July 10, 2007, 04:37:06 pm by EKDENTON »
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let's rock
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EL34
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« Reply #2 on: July 10, 2007, 09:09:45 pm » |
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Save them all!
I have probably 20 of them in a box and I am always digging through them to find a power supply.
I even used a malibu outdoor lighting transformer by dewinding some of the secondary windings to bring the voltage down from 13 to 9 volts. I use that for outdoor security cameras.
I had a 1.5 amp 24 volt satellite modem set power supply. You think you will never need that for anything. 3 years later it was perfect for my Dallas one wire weather station sensors.
I used a notebook computer power supply for a mp3 player.
Don't throw transformers away, cause you'll need them some day. (Hmm, new song lyrics)
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« Last Edit: July 10, 2007, 09:15:05 pm by EL34 »
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Fresh_Start
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« Reply #3 on: July 10, 2007, 09:57:29 pm » |
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Doug - I'll help you with more corny lyrics if you want 'em ;)
What is "normal" polarity for pedals, say a Boss DS-1? Tip or sleeve positive?
Thanks,
Chip
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We have proven once again no plan survives contact with the enemy, or in this case, with the amp. Plan to be wrong about something. |
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EL34
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« Reply #4 on: July 11, 2007, 11:41:19 am » |
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I don't remember but it seems to me they are reversed from the norm so people thought they had to use boss power supplies.
Been a while but I remember doing a pedal board or two for guys and had to re-do the plugs for the boss pedals.
been a while.
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jjasilli
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« Reply #5 on: July 11, 2007, 10:21:38 pm » |
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I believe Radio Shack has polarity reverse adapters, if that helps.
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Dynaflow
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« Reply #6 on: July 12, 2007, 12:15:20 am » |
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Second hand stores are a good source for getting them cheap too. Usually a buck or so, weed through read the top, I've gotten several that way for stuff I misplaced during my move for example. I've gotten some small rs232 switch boxes for small projects for next to nothing, could easily do a rangemaster for example (like the original which was not a pedal) in one.
Regards,
Dyna
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Making the world deaf 18 watts at a time...
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birt
Level 3
 Offline
Posts: 614
I love tube amps
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« Reply #7 on: July 16, 2007, 08:45:16 am » |
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standard for most pedals is center negative
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jerrydyer
Level 3
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Posts: 534
Make it one of a kind
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« Reply #8 on: July 17, 2007, 05:43:27 pm » |
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I have a drawer full as well. its hard to throw stuff away that plugs into the wall.
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