BeefLips Posted July 5, 2002 Share Posted July 5, 2002 I just bought a used Boss DM-2 Analog Delay pedal (circa 1980) on eBay, and would like to use it with an AC adapter rather than make the battery companies richer. The guy who sold it to me recommended that I use a Danelectro "Zero-Hum" AC Adapter (which puts out 9.6v at 200 ma), but I want to make sure that it's safe for this pedal; I don't want to blow the damn thing! Does anyone know if the Danelectro unit is safe for use with the DM-2? The DM-2 came without a manual and the case doesn't mention anything about power requirements (other than 9v). Thanks for any advice. -- Peter Link to comment Share on other sites More sharing options...
gcerq Posted July 6, 2002 Share Posted July 6, 2002 Have you tried e-mailing Boss (http://www.bossus.com)? See if you can find something here: http://www.harmony-central.com/Effects/Data/Boss/DM_2_Analog_Delay-01.html Link to comment Share on other sites More sharing options...
BeefLips Posted July 6, 2002 Author Share Posted July 6, 2002 Thanks for the suggestions. I had already checked the Harmony Central reviews, but no info there on power supplies. The Boss site is focused almost entirely on their current products, and they don't show an e-mail address. They don't have a board either. They claim to have an "online forum" but it really isn't one at all; they publicly answer only a few selected questions on an irregular basis. -- Peter Link to comment Share on other sites More sharing options...
gcerq Posted July 6, 2002 Share Posted July 6, 2002 What about this I found on this site (http://www.analogman.com/faq.htm#boss) Power supplies A question : What 9 volt AC adaptors should I use for my vintage effects? For example, I have an old Small Stone that sounds bad when I use a 300mA 9 volt adapter. Should I be using something else? That adaptor should be OK, but there is more than just max current (300mA) and voltage (9V) spec that matter. You also need one with good noise filtering and voltage regulation. A cheap generic radio shack type will not have good enough filtering for musical accessories so you will hear 60hz AC hum. So I recommend a Boss PSA (PSA120 in the USA) for most vintage effects, or the 9V dunlop ones. The Dunlop comes with a Boss style (barrel) plug, or the 1/8" pin type like an old MXR or EH effect. My Boss DM-2 does not work well with my power supply, what's up with that? Many old Boss pedals were designed for an unregulated ACA power supply. The PSA will not have enough voltage to work with them. So check your pedal, they originally had a sticker on them telling you which power supply type to use. If it says PSA then any regulated power supply (Dunlop, Ibanez, etc) will work. But if it says ACA, then you need to get a boss ACA (ACA120 in the USA) power supply. Mike thanks for getting back to me. I gave a look at your BC RICH unit. I already have a custom pedal board that has a velcro surface, so all I need is a power supply that has multiple styles of output jacks. If you know of anything I would love to hear about it. tc electronics made a nice power supply with four small 1/8" or so phone jacks on it, you can make your own power cables with any type plug on the other end (parts available at radio shack). Boss and Ibanez use 2.1mm internal 5.5mm external coaxial plugs. MXR made a power supply with four 1/4" guitar style jacks on it. I had some of the original MXR bottom plates for use with this type of power supply. They replace your original bottom plate. They have 1/4" plugs to plug into this power supply, and battery clips which attach inside your effect to your battery clip. You will need to use a good quality regulated power supply with good A/C filtering, or you will get hum. If you use a generic "radio shack" unregulated, unfiltered wall-wart power supply you will not be happy (nor will your pedals!). There is a schematic for building a good regulated 9V power supply on the web. cln9powr.gif can be found on the Leper's schematics page I think. The best power supply available is from Digital Music (Voodoo labs). It has eight isolated power outputs so your effects will not have any problems no matter what the polarities are. You could probably even run 2 together for 18Volts! Link to comment Share on other sites More sharing options...
BeefLips Posted July 7, 2002 Author Share Posted July 7, 2002 Originally posted by gcerq: [QB]What about this I found on this site (http://www.analogman.com/faq.htm#boss) Thanks! As a matter of fact, last night I wrote to Mike at analogman.com and he wrote back to point me to that very same FAQ material that you posted! Based on what I've read so far, I'm pretty sure that using the Danelectro Zero Hum adapter (9.6v, 200 ma) won't *hurt* the Boss DM-2 -- but it remains to be seen whether it will supply enough voltage. I haven't tried it yet, out of fear! If the voltage is insufficient, then I'll probably have to get the Boss ACA-120 power supply, as analogman.com suggests. Thanks again for doing that footwork! -- Peter Link to comment Share on other sites More sharing options...
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