Pedal whine
I just messaged the manufracturer:
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I have a single-digit serial # Meat pedal, and a 400's # Meat, Jr.
Both work fine with batteries, but using a 1-Spot or Mr. Power, even if they are the only pedal, results in whine-like noises. Is that because the power-supplies are not isolated? Is there a mod I can do to use these pedals on my board without having to use batteries?
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If any of all y'all have an idear, lemme know, please.
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I have a single-digit serial # Meat pedal, and a 400's # Meat, Jr.
Both work fine with batteries, but using a 1-Spot or Mr. Power, even if they are the only pedal, results in whine-like noises. Is that because the power-supplies are not isolated? Is there a mod I can do to use these pedals on my board without having to use batteries?
=========================
If any of all y'all have an idear, lemme know, please.
Well better regulated supplies, maybe tweaking the value of that big grey cap, if it's on the power line. I think there's like a chargeable 9v supply you can get, that would give you clean DC for a gig.
Simplest and best DIY would be build a nice regulated 9V supply, going by the size I imagine the 1-Spot must be a switch mode, I have an older Boss supply that is regulated well, look for something like that?
Simplest and best DIY would be build a nice regulated 9V supply, going by the size I imagine the 1-Spot must be a switch mode, I have an older Boss supply that is regulated well, look for something like that?
The previous statement is from a guy who records his own, and other projects for fun. No money is made.
Toadworks responded:
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Hi Mick
The short answer is yes, there is a simple mod - and yes, it's because the
op-amps in the signal path are not decoupled from the power supply... when I
designed them, it wasn't a problem... but some of the newer digital power
supplies generate ALOT of noise, so this has become necessary on all new
designs.
Easy mod: both pedals should have a red, white, and black wire connecting
the 2.1mm DC jack to the PCB. Replace the WHITE wire with a 25 ohm resistor.
That should fix the problem.
Feel free to contact me if you have any other questions.
-Ryan
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Hi Mick
The short answer is yes, there is a simple mod - and yes, it's because the
op-amps in the signal path are not decoupled from the power supply... when I
designed them, it wasn't a problem... but some of the newer digital power
supplies generate ALOT of noise, so this has become necessary on all new
designs.
Easy mod: both pedals should have a red, white, and black wire connecting
the 2.1mm DC jack to the PCB. Replace the WHITE wire with a 25 ohm resistor.
That should fix the problem.
Feel free to contact me if you have any other questions.
-Ryan
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