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Post by John on Feb 15, 2022 12:01:56 GMT -7
I just received a JHS reverb pedal. I want to use it with my acoustic. The chain is: 1) Guitar....2) vocal processor/harmonizer (with guitar out)...3) JHS reverb...4) Powered PA cabinet.
I set it all up in the basement and there's TONS of noise when the reverb is turned on. I turned off the UV lights...still the same amount of noise/buzz. Then I removed the vocal harmonizer and went guitar/reverb/PA cabinet. Same amount of noise.
So I took the all the stuff upstairs and went guitar/reverb/PA cabinet...same results. Unacceptable amount of noise. Similar to when you unplug an electric guitar and there's that noise you have....even if you don't touch the cable tip. I made sure the pedal was at least 6 feet from the PA cabinet. (Not that it should matter, but I'm running out of trouble shooting options.)
The JHS pedal says the inside connection of the power jack must be negative. I looked at the wall wart and it confirms the inside connection is negative.
So I've tried to go with the most basic setup in two different places in the house.
EDIT: I measured the wall wart with my multi-meter...the wall warts says output is 9 volts.....the multi meter says it's 12.25 volts. The JHS literature says to NOT use it with a 12 volt supply. Perhaps this is my problem? Would a 12 volt power supply cause a pedal meant for a 9 volt supply cause such noise?
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Post by nick0 on Feb 15, 2022 12:20:03 GMT -7
Maybe? Power is really important when it comes to noise. I found out the hard way, many times. What kind of power supply is it? Have you used it on other pedals without an issue? The pedal is probably digital so it may be really picky on power. Get a truetone one spot. Well worth the 22 bucks. Best of luck!
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Post by John on Feb 15, 2022 14:15:53 GMT -7
The power supply I used was a very old one....25 years old? It still works. But something's broken on the inside...I can hear something rattle when I shake it. But what bother's me more is that it's 12v not 9v. The only other power supply I could find was another 12 volt. Very strange I couldn't scrounge up a 9volt supply somewhere in all the junk on the shelves in the basement. I ordered this: www.amazon.com/gp/product/B06XHNP9SB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
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Post by nick0 on Feb 15, 2022 14:25:47 GMT -7
I have no experience with that power supply. I can say from personal experience that you shouldn't go cheap if you're after low noise. I have a half dozen one spots just for kicking around the house. They have always done the job with low noise power to any pedal I've tried them with. Good luck!
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bigez
New Member
Posts: 46
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Post by bigez on Feb 15, 2022 17:03:30 GMT -7
try this: when everything is plugged in and you experience the noise, take a length of wire and wrap it around both of the metal shields of the patch cables that plug into the pedal. if you can, also attach an end ofthe same wire to one of the screws attaching the back panel. then move your hands away. does that help? i had similar issues with 2 jhs pedals , where the outer shields of the cables weren’t both connected to the pedal ground point. that will make the unshielded cables act like a big antennae.
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Post by LT on Feb 16, 2022 9:39:50 GMT -7
+1 on power supply. I sold a digital pedal due to noise and, looking back, I'm 99% certain that it was an inexpensive power supply. I'm a TrueTone user now (2 CS6's and several One-Spots).
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Post by John on Feb 17, 2022 16:54:21 GMT -7
New power supply arrived. Plugged it in... It works fine now. Power supply was the problem.
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Post by nick0 on Feb 17, 2022 19:19:22 GMT -7
Glad you got it all sorted out!
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