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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
 Posted - 12/18/2008 : 23:51:11
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I need an 18v dc adaptor with a Boss-style centre negative 2.1mm jack - Does anyone know where i could get one cheaper than this:
http://www.maplin.co.uk/Module.aspx?ModuleNo=220918
Preferably don't need all the gubbins, i.e. just a UK mains plug, single 2.1 mm dc plug etc...
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Edited by - Leeroyfunk on 12/19/2008 17:09:20 |
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the-destructor
Silver Member
USA
334 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/19/2008 : 17:08:48
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| Try your local thrift store - they usually have a box full of assorted wall warts. I haven't paid more than $1 for a generic adapter in years. |
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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
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nathanscribe
Silver Member
United Kingdom
376 Posts |
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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/20/2008 : 00:36:02
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quote:
Originally posted by Leeroyfunk
Ah, cool: I found this -
http://www.rapidonline.com/Electrical-Power/Power-Supplies/Plug-In-PSUs/65W-DC-Desktop-switch-mode-PSU/80859
Quite cheap.
But what is a switch mode psu? Is it related to regulated/unregulated issues? Have I in the past read Dr Bob muttering darkly about this switch mode?
In short, is this psu likely to be noisy and/or fry my precious early-80's analog toy?
Arrrggggh!! Switched mode! Dr. Bob, Stinkfoot and I all dislike switched mode, particluarly for vintage pedals - if the power supply shorts out it can destroy the pedal.
Have a look here and be afraid: http://www.stinkfoot.se/andreas/diy/articles/trans.htm
The type that is safest is "linear" - something with a linear voltage regulator. However, usually a pedal needing an 18V supply has a regulator built in, so you may be able to get away with an unregulated supply.
What sort of pedal is it? An old Electro Harmonix?
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verivorax
Platinum Member
Canada
1185 Posts |
Posted - 12/20/2008 : 03:29:32
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off the dunlop website:
ECB04E AC Adapter - Barrel - 18 Volt - 150 ma � Euro
U.S. Suggested List Price: $25.65
or
ECB004UK AC Adapter - Barrel - 18 Volt - 150 ma - U.K.
U.S. Suggested List Price: $25.65
OR... Voodoo makes (and you can yourself) a cable which marries two 9v outputs (from pedal power II, for example) into a single 18v barrel.
Electro-Harmonix makes their own 18v adapters and it seems they're available for the UK market. The model is 18DC-500 (with a suffix maybe to designate the wall voltage) - but I couldn't make out what the polarity was from the pics.. |
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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
Posted - 12/21/2008 : 11:59:20
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quote:
Originally posted by Laurie
What sort of pedal is it? An old Electro Harmonix?
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FRANZONI
Double Platinum Member
Ireland
3543 Posts |
Posted - 12/21/2008 : 13:38:55
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Thats a quality piece of kit..... better off stretching for a decent adapter rather than going el cheapo and blowing the s**t out of it with a dodgy one from Del boy down the markets...... .... |
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tony
Bronze Member
United Kingdom
142 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
Posted - 12/21/2008 : 23:32:56
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quote:
Originally posted by Laurie
I am looking at the schematic here:
http://www.freeinfosociety.com/electronics/schemview.php?id=577
And it looks for all the world to me like the thing is designed to run off 9VDC, not 18V.
Have you tried a Boss PSA adapter?
I think that is the schematic for this one (a PH-03):
I'm fairly sure there is no schematic on the web for the PH-44 (it has dual speed controls, an input level control, and an extra footswitch to ramp up and down between speeds in a Leslie-style) as I found out recently when i had to get it repaired: It is clearly marked as an 18v input, it uses 2x9v PP3 batteries, and the tech who repaired the power regulator told me i should use an 18v supply. I think he traced out my pedal, and intends to publish the schematic himself.
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Edited by - Leeroyfunk on 12/21/2008 23:34:37 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/22/2008 : 01:00:22
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quote:
Originally posted by Leeroyfunk
quote:
Originally posted by Laurie
I am looking at the schematic here:
http://www.freeinfosociety.com/electronics/schemview.php?id=577
And it looks for all the world to me like the thing is designed to run off 9VDC, not 18V.
Have you tried a Boss PSA adapter?
I think that is the schematic for this one (a PH-03):
I'm fairly sure there is no schematic on the web for the PH-44 (it has dual speed controls, an input level control, and an extra footswitch to ramp up and down between speeds in a Leslie-style) as I found out recently when i had to get it repaired: It is clearly marked as an 18v input, it uses 2x9v PP3 batteries, and the tech who repaired the power regulator told me i should use an 18v supply. I think he traced out my pedal, and intends to publish the schematic himself.
Righto! I'll leave it to the other good folks in the UK to help with a local supplier.
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Leeroyfunk
Silver Member
United Kingdom
400 Posts |
Posted - 12/22/2008 : 13:16:44
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quote:
Originally posted by verivorax
OR... Voodoo makes (and you can yourself) a cable which marries two 9v outputs (from pedal power II, for example) into a single 18v barrel.
This has got me interested -
http://www.guitarcenter.com/Voodoo-Lab-PPY-18V-Y-Cable-150473-i1388323.gc
I've already got a spare regulated 9v "DC brick" style power supply: If I join two outputs together with this Y-lead to create 18v, is it likely to be safe/noise-free etc? (the supply i'll be using has always been very quiet in the past). Are there any drawbacks to this method? It's alot cheaper than buying a dedicated power adaptor that will only ever power a single pedal...
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DeFrag
Moderator
USA
3409 Posts |
Posted - 12/23/2008 : 06:00:50
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| I could use a cable like that! |
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Topic |
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18v adaptor
T-D