Very high pitched static noise with 1987x when enabling boost pedal - Suggestions?

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Jakem

Jakem

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Hi all,

I bought a new Marshall 1987x earlier this spring and I noticed ear fatigue, which continued for days, after playing sessions at home. My Mrs. was listening me playing today and she said she hears very high pitched static noise. We started investigating it and she noticed the high pitched loud noise starts when the boost (DOD YJM308 or Fender YJM OD) is engaged and I turn the guitar volume knob up. I don’t even have to start playing, the noise starts immediately after turning the guitar volume knob up.

Guitar signal chain:
Fender YJM Strat -> DOD YJM308 or Fender YJM OD -> 1987x -> Suhr Reactive load IR -> SSL2+ -> Genelec G3. The same thing happens if I run the 1987x thru a passive load box and run it thru a Marshall 1912 cab.

Any suggestions on what is causing this? I’ve tried 2 different power sources for the pedals; Truetone 1SPOT and Truetone CS-7.
 
Sooo took my Ibanez out and the high pitched noise was gone. Looks like the YJM Strat pickups might be more noisy or prone to interference? :) It also looks like the distance to the amp affects this; The noise could be heard when the guitar was 2.5m from the amp but when I moved further away (3+ meters) to the amp’s side the noise disappeared. Does the YJM strat need shielding to the pickguard or something? :)
 
Your YJM strat I imagine has the Duncan YJM pickup set and these are stacked single coils so they should be a lot less noisy than an actual single coil. However if what you’re getting is like a high pitched static kind of sound that would be electromagnetic interference, which all types of pickups and the rest of your guitar’s electronics can suffer from. An OD or boost pedal will absolutely amplify that in a bad way. On an OD like a tubescreamer, the higher you set the Tone knob, the worse and louder it will sound.

If this is the issue, it won’t be enough to just shield the underside of the pickguard. That by itself only really helps with static crackles and pops from touching the pickguard while playing. You have to also shield the pickup and control cavity.
 
How is the V1 tube? Since you are using an IR loader, are you pushing your amp hard? One of the downsides of IRs and such are that the amps are being pushed to big stage levels without the big stage noises that hide the whacky noises that cranked up amps make.
Ive had transformers ring a little that drove me nuts
 
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Hi, thank for the replies. Yes, I am running the amp at very high levels (2-4 o’clock on both) into the Suhr IR. Maybe I could try changing the preamp tubes to see if it helps?
 
Another possibility, if it's like a high pitched 'whistle' type of sound, could be caused by a switching power supply. The ones with a narrow wall wart, so to speak. Those do not have a transformer inside. The Visual Sound OneSpot is one of the good ones, but I've returned power supplies for pedals for this exact reason. That whistle is around 12kHz. Just a thought...
 
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You just cant use single coils(even stacked) with the dod preamp into a lou d marshall, and not expect white noises...
Just get a noise gate..
 
I do think it is worth the time to roll a known 12AX7 through the front of the amp - particularly the V-1 position as mentioned above. I also 2nd Speedemon’s suggestion re: power supply. When I finally stepped up to a quality power supply for my stomp FX, it quieted my rig down significantly.

Even recently I was having a noise issue with intermittent signal loss - which I immediately thought was an amp issue. After a half day of trouble shooting I traced it down to a bunk ‘you-assemble-it‘ cable on my board - the kind with the push and twist 1/4” jacks. Absolute trash. I was so relieved that it wasn’t my amp - and so pissed at those trashy cables - that I ordered custom length Mogami patch cables with soldered ends for the entire board. My rig is now so quiet with such hot and clear signal to the amp it almost is like having a Decimator.
 
Speeddemon said:
Another possibility, if it's like a high pitched 'whistle' type of sound, could be caused by a switching power supply. The ones with a narrow wall wart, so to speak. Those do not have a transformer inside. The Visual Sound OneSpot is one of the good ones, but I've returned power supplies for pedals for this exact reason. That whistle is around 12kHz. Just a thought...
Click to expand...
I’ll check this by using a battery in the DOD or Fender YJM OD. Thanks!
 
PDC said:
I do think it is worth the time to roll a known 12AX7 through the front of the amp - particularly the V-1 position as mentioned above. I also 2nd Speedemon’s suggestion re: power supply. When I finally stepped up to a quality power supply for my stomp FX, it quieted my rig down significantly.

Even recently I was having a noise issue with intermittent signal loss - which I immediately thought was an amp issue. After a half day of trouble shooting I traced it down to a bunk ‘you-assemble-it‘ cable on my board - the kind with the push and twist 1/4” jacks. Absolute trash. I was so relieved that it wasn’t my amp - and so pissed at those trashy cables - that I ordered custom length Mogami patch cables with soldered ends for the entire board. My rig is now so quiet with such hot and clear signal to the amp it almost is like having a Decimator.
Click to expand...
Thanks for the great advice! :)
 
A couple of members have reached out to me via pm asking where I got the custom length Mogami patch cables for my pedalboard. I ordered all of them from Bulk Cable Co out of AZ. They have a big store on reverb. Here is a link to one of their many listings. They will build any length you need with straight or angled connectors. Yes, they are expensive and yes, many forum members are plenty handy enough with a soldering iron to cobble these up for themselves. But the quality from Bulk Cable Co is top notch, customer service is fantastic, and it was just so easy to measure everything I needed, place one order, and boom - a board that looks so clean and tidy underneath it looks like something a touring pro would use.

https://reverb.com/item/43252651-8-...sp500-sps5-right-angle-to-straight-connectors
 
Forgot to write about these additional tests I made:
-DOD 250 reissue, DOD YJM308, Fender YJM OD -> 9V battery as power source did not help, the noise is there with all of these pedals
-Xotic BB pre -> no noise
-TS808 RI -> no noise
-Boss SD-1 -> no noise

So seems like the DOD 250 circuit or its slight modifications on DOD YJM308 and Fender YJM OD is causing this.
 
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