Power Supply Help

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JerEvil

JerEvil

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Hey all,

It seems in the move I lost a critical power supply. See attached. Will the power supply I found power the unit pictured?
 

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JerEvil said:
So this guy would work?

https://www.amazon.com/Charger-Supply-Adapter-100V-240V-Available/dp/B09XMHWV9K/ref=mp_s_a_1_2_sspa?adgrpid=165102802212&dib=eyJ2IjoiMSJ9.Kr997NwzX5_zj_AjOgGOMeGa8Mj9c7feLJibEa0hQQPJjoBTJcDksC0EI0z3RemfpkYO-ENlPLU6dB_oHn8gImcPCVAZxzgTuvyhe7QKgYnJgqnqxSl2OAfbDoSLjcF7uMFzE64pJIrEpZ5enbN-BhMDdpKpjzCIdTL_r00iqOxSUpcxUN-5Dy6W14QyjTxWYCJuIOBhswQ2cfsVdoumNw.arUp2rViD_aoClI6GPA_7uS2PQvO1aP4UO5NR-btRAQ&dib_tag=se&hvadid=693636623461&hvdev=m&hvexpln=68&hvlocphy=9011509&hvnetw=g&hvocijid=10147043601949533928--&hvqmt=e&hvrand=10147043601949533928&hvtargid=kwd-338059935341&hydadcr=25582_13572302&keywords=24v+300ma+power+supply&mcid=5c9e3157409733c6b1f05cc710737545&qid=1747274051&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1&th=1
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Looks like it. As long as the plug fits, 24v and 1500ma is plenty.
 
Can I ask a similar question? I have an Eventide Powermini and received a power supply with it. It works, but it's only rated for 1200mA and the power supply is capable of offering 660mA per outlet. I'm not powering anything crazy like that, but if I wanted to use the power supply to its full potential, should I get a different power supply?

Can anyone explain the 9V-24V option? I'm so confused when it comes to this shit.
 

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marl3y said:
Make sure to check the polarity of the plug too.
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Yeah the plug shows the - on the left and + on the right line the unit does. The only difference on the center is on the unit the empty space faces left and literally every power supply I find it faces right…
 
JerEvil said:
So this guy would work?

https://www.amazon.com/Charger-Supply-Adapter-100V-240V-Available/dp/B09XMHWV9K/ref=mp_s_a_1_2_sspa?adgrpid=165102802212&dib=eyJ2IjoiMSJ9.Kr997NwzX5_zj_AjOgGOMeGa8Mj9c7feLJibEa0hQQPJjoBTJcDksC0EI0z3RemfpkYO-ENlPLU6dB_oHn8gImcPCVAZxzgTuvyhe7QKgYnJgqnqxSl2OAfbDoSLjcF7uMFzE64pJIrEpZ5enbN-BhMDdpKpjzCIdTL_r00iqOxSUpcxUN-5Dy6W14QyjTxWYCJuIOBhswQ2cfsVdoumNw.arUp2rViD_aoClI6GPA_7uS2PQvO1aP4UO5NR-btRAQ&dib_tag=se&hvadid=693636623461&hvdev=m&hvexpln=68&hvlocphy=9011509&hvnetw=g&hvocijid=10147043601949533928--&hvqmt=e&hvrand=10147043601949533928&hvtargid=kwd-338059935341&hydadcr=25582_13572302&keywords=24v+300ma+power+supply&mcid=5c9e3157409733c6b1f05cc710737545&qid=1747274051&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1&th=1
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Correct voltage and it supplies enough current but polarity is wrong. Notice on the supply the little diagram on the bottom left shows center-positive. The unit needs center negative. You would need to cut the end of the plug off and re-solder it with the + and - swapped.
 
phillybhatesme said:
Can I ask a similar question? I have an Eventide Powermini and received a power supply with it. It works, but it's only rated for 1200mA and the power supply is capable of offering 660mA per outlet. I'm not powering anything crazy like that, but if I wanted to use the power supply to its full potential, should I get a different power supply?

Can anyone explain the 9V-24V option? I'm so confused when it comes to this shit.
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Looking at the manual it looks pretty flexible as far as input voltage, you can use either a DC supply (output between 9v and 18v dc), or an AC supply (output between 9v and 12v ac). But it wants more current, 2 amps. Your supply is 1.2 amps, so you won’t be able to draw the full rated ma from each tap. Those are high ratings though so if you’re just running some boost pedals off it or something (typically very low current draw) you may be fine. See the table on the bottom of the last page of the manual
https://downloads.eventide.com/audi...ide PowerMINI manual_PC_1.1_24.08.2022.PC.pdf

Re- 9v / 12v / 15v / 18v selection - weird it doesn’t show on the unit or in the manual what to set the dip switches to, just that the led is brighter at higher voltages. The larger one shows this -

IMG_0540.jpeg


Which I assume is the same (good idea to flip through the options and make sure the LEDs get incrementally brighter as you increase voltage).
 
phillybhatesme said:
Can I ask a similar question? I have an Eventide Powermini and received a power supply with it. It works, but it's only rated for 1200mA and the power supply is capable of offering 660mA per outlet. I'm not powering anything crazy like that, but if I wanted to use the power supply to its full potential, should I get a different power supply?

Can anyone explain the 9V-24V option? I'm so confused when it comes to this shit.
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Pretty much it's going to take anything from 9V-24V DC or 9-12V AC as....... just make sure it's the right polarity and all that other shit......


And yeah you would need more power if say your running like 4 High power Digital or Tube Pedals....... You may be able to use the Strymon adapter or even a Laptop adapter...

If you had the regular CIOKS or the black version you would be able to probably fully power it with a properr power bank too as it has a USB-C.


But the Eventide ones are
 
Yeah, the polarity is backwards on that.
marl3y said:
Make sure to check the polarity of the plug too.
Click to expand...
JerEvil said:
Yeah the plug shows the - on the left and + on the right line the unit does. The only difference on the center is on the unit the empty space faces left and literally every power supply I find it faces right…
Click to expand...
Yeah, the polarity is backwards for that plug.
 
I had to learn the hard way by frying a Fostex 4 track back in the day.


Polarity has to be the same.
Voltage needs to be the same.
Current requirement of the device being powered needs to be at or below what the power supply is capable of putting out.
 
JerEvil said:
Or would this do it?

https://www.amazon.com/Mr-Power-Reverse-Polarity-Converter-Keyboard/dp/B016XFCVSY/ref=mp_s_a_1_3_maf_1?crid=2OFP7UB7YJMRW&dib=eyJ2IjoiMSJ9.Sq4UpyLRsF0FiYv7WpQLfuyZMsqgF4OxqFFl1FYcN3OY2MYG6QOKaLL8GpHHRf4AFuy0rAyTmYLP9Ks-SHn_Fskbv3MbvcO8ZIDn9InarpV7QZGxj3fpx0MGaw6OqMSQzkgIUJYsVzlEyfu-Kdnc82RIUFee8Sa99klHmCqCnDTZE245yQTse2RRB0nQUUJUNUY1X9vBNZ25gsISANo2ig.qmbzQNOnFm0bxIaEHY9DIx-HExqArqrMHgPZJcGzO28&dib_tag=se&keywords=reverse+polarity+adapter&qid=1747323586&sprefix=reverse+polarity,aps,147&sr=8-3
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Yep. Just don’t forget to use it!

Also something to note i forgot to mention before - usually when you see center positive power supplies they are IT power supplies meant for phones, routers, various computer stuff where it doesn’t matter if the supply is noisy.

When used for audio equipment, especially high gain like most of us use, those non-audio power supplies can inject switching noise into the signal path which can sound like buzzing, humming, or fluttery beeping. I scrounged up power supplies off old house phones and stuff back when I was younger and would cut the ends off and solder on boss-style barrel plugs to use them for my pedals, it was usually 50/50 whether it would be noisy or not.

Power supplies used for audio usually have better filtering and in the case of switch-mode power supplies (which is almost every wall-wart these days) the switching frequency is well above the audible range.
 
JerEvil said:
Hey all,

It seems in the move I lost a critical power supply. See attached. Will the power supply I found power the unit pictured?
Click to expand...
What is the exact unit you're trying to power?

It looks like it requires 24 VDC, with a negative center polarity and at 300 mA.

The first power supply you pictured only produced 8 Volts, so that would never work. Way under-powered for what you need. Also, it's a center-positive plug, rather than negative; so even if it could produce the necessary 24 volts, the polarity is backwards, so you would probably destroy what you're trying to power.

The Amazon power supply you referenced in Post #4 claims 24 Volts AC/DC, but the polarity on that one is also backwards (center POSITIVE).

I suppose you could use a reverse polarity adapter cable/plug, but you would only have to forget to use it once and you would risk destroying what you're trying to power. Sounds like it's a pretty important piece of equipment, to you, so I wouldn't recommend taking the risk.

It's probably best to get the right item, in the first place, rather than trying to adapt it to be something else.

Wall wart power supplies aren't that expensive, so it'd be worth doing the research and finding the best power supply to do the job, without having to make any modifications to it, so it would work properly, right out of the box - and for your peace of mind.

If you supplied the exact make and model of what you're trying to power, it'd be easier to look up a suitable power supply for it.
 
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