Re: [Harp-L] Did I fry my ART Tube MP pre-amp wall wart

["steve warner" <10reedsbent@xxxxxxxxx>]

This is my first post in many months.  Howdy everyone!  I'm back with all my
fat tone microphone secrets intact.

Mike,
If what you say is exactly what happened then I give you the following:
I believe you damaged only the plug tip.  You forced the plug into the
DD-3's input and you damaged it and that's why your MP doesn't light up.
There's no reason your ART MP should be damaged because your DD3 did not
''create'' a sudden surge of bucking 9+ DC volts to fry the secondary on the
adapter's transformer.  Impossible.

>From what you described  It's likely that you've  pushed in the positive tip
inside the plug....broken in other words .  Do what Bob said and get a
replacement plug from the electronic supply house and never plug in
something that doesn't fit.  Of course match the voltages, but try and match
the mA rating....(tha'ts milli-amp).


On 3/30/08, Bob Laughlin <rlaughlin@xxxxxxxxxxxx> wrote:
>
> Okay,,my turn,,haha
>
> I've been an electronics enthusiast, via amateur radio, AND an electrician
> by trade, for 25 or so years, so, on a limited basis I know what I'm about
> to say:
>
> First, since the power supply doesn't work on the ART Tube MP pre-amp
> anymore, you probably did damage to the power supply, rather than the
> pre-amp.
>
> Before plugging, or even unplugging the power supply from this or that, it
> should be unplugged from the wall, ideally. If, while plugging or
> unplugging
> these things into this or that, the tip shorts to the shell (of the 9V
> plug
> end), it could possibly damage the windings of the transformer, making it
> unusable. That's probably what happened. A transformer has two sets of
> "windings", or "coils", one in proximity to the other, transferring
> electrical power, through the principle of inductance
> (http://en.wikipedia.org/wiki/Inductance), to the other coil, e.g.,,from
> the
> wall plug end to the 9V plug end. During this transfer, the voltage is
> changed, to make it applicable to whatever you're using,,the delay pedal,
> the pre-amp, etc.
>
> Also, before trying this, after unplugging from the wall, you should have
> gotten a hint from the fact that the plug didn't fit, to simply give up
> the
> attempt. When something doesn't fit, physically, it usually won't work,
> electrically, and may damage whatever you're working with.
>
> Next, the voltage specs are generally written on the power supply, but
> this
> doesn't account for polarity, i.e.,,which is positive and negative, the
> tip,
> or the shell, on the plug. This could be tested with a small voltage
> tester,
> known as a "VOM" (Volt-Ohm-Milliameter), or "Multimeter", if you know how
> to
> use one. I'm not entirely sure whether the tip is always positive, or the
> shell, or whether there are variations. In my years of electrical work,
> you
> ALWAYS find variations, so caution is paramount, if you wish to avoid a
> catastrophe.
>
> But still, the fact that the plug didn't fit,,that's the big one. "If it
> don't fit, you must acquit,," (Oh wait,,that was the "OJ" trial,,). If it
> don't fit, just quit, or maybe your equipment will go to sh**. NEVER force
> things. If they don't SEEM made for each other, they probably aren't.
>
> As was posted already, you can probably find a "universal power supply" at
> a
> local "Radio Shack" store, or electronics supply house. You have to be
> clear
> what voltage you're getting from the wall socket, 120, or 230, or
> whatever,,and what voltage you wish to derive from the power adapter,,9V,
> or
> whatever. That's crucial. Then, you have to have the right plugs, on the
> wall end, AND on the equipment end. The universal supply often comes with
> a
> multi-ended adapter, with which one may find the right plug to go to the
> equipment.
>
> Once having worked out these details,,the voltages, and the plugs, there's
> still the matter of polarity.
>
> It's always best just to get a replacement supply from the company that
> makes the equipment.
>
> BL
>
>
>
> ----- Original Message -----
> From: "M. N." <mnessmith@xxxxxxxxxxx>
> To: "list harp" <harp-l@xxxxxxxxxx>
> Sent: Sunday, March 30, 2008 12:43 PM
> Subject: [Harp-L] Did I fry my ART Tube MP pre-amp wall wart
>
>
> >
> > Tonight I was monkeying around with my new ART Tube MP pre-amp, running
> it
> into my little tube amp and loving the sound. I decided to switch gears
> and
> try out my BOSS Digital Delay DD-3, which I haven't used in awhile. It
> didn't have a battery in it and, rather than scrounging around to find a
> 9v
> battery, I just unplugged the power cord for my ART Tube MP and plugged it
> into the BOSS Digital Delay DD-3. The plug itself didn't quite fit (is too
> long), so I pulled it out and popped it back into the Art Tube MP pre-amp.
> Result? No lights on the ART Tube MP, and no sound. No nothin.
> >
> > I'm afraid I did something really dumb and am now going to pay a stupid
> tax.
> >
> > Here's what the ART Tube MP pre-amp's wall wart says: INPUT: 230V~50Hz,
> and under that: OUTPUT: 9V~1000Ma. (I am in Europe, btw, that's why the
> 230V.)
> >
> > Here's what the sticker on the back of the BOSS Digital Delay DD-3 says:
> 230V .... PSA-230 (9V DC)
> >
> > Any guesses on what this Einstein did?
> >
> > MN
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-- 
steve
www.thunderharpmics.com
fattest tone on earth!