Getting a "whistle" from my amp???

[Aceman]

Here is the situation:

Amp - Mesa Stiletto. Whistle is only on high gain channel.

Guitar straight in is fine. Only the normal "hiss" associated with epic gain.

However - I get a hum/whistle noise as soon as I go into any effect. Chain is:

Guitar > EHX Pitchfork > EHX Synth9 > Morley Wah

I thought this was due to a mega-junction box at last gig. But it is now in my music room! I have tried into only pitch, only Synth, and only Wah. I get less with the Wah than the other two, but I get it with all. What's up???

 

[NegativeEase]

Re: Getting a "whistle" from my amp???

Whistle is most often preamp tube issue. swap the channel tubes and see if it follows.

 

[Gtrjunior]

Getting a "whistle" from my amp???

Getting a "whistle" from my amp???

Just speculating but if any of those pedals are digital you may need to put them on their own power supply. I was using the Digitech drop a while back and it caused a digital whistling until I used a separate power supply.

But since you get it regardless, I’d try the preamp tube swap first.

 

[Chistopher]

Re: Getting a "whistle" from my amp???

Take it as a compliment and move on.

 

[Hsb]

Re: Getting a "whistle" from my amp???

I saw something today in the comments of an EHX pedal, that EHX 9 pedals need to be on their own power supply or isolated power, if they are daisy chained you will get noise.

Couldnt find the video I saw it on but whomever the EHX person was in the video made a comment when someone in mentioned they were getting a noise. The EHX rep stated the above.

I did find a comment in the official EHX review of the Turnip Greens pedal. Someone stated thwy were getting a whistle when playing the pedal. EHX again stated the same about the power suplly

 

[Mincer]

Re: Getting a "whistle" from my amp???

Does it whistle when the effects are connected, but off?

 

[80's_Metal]

Re: Getting a "whistle" from my amp???

Jam your Jack in and out of the holes a few times especially the effects loop.... If that doesn't work, I'd suspect tubes.

 

[Aceman]

Re: Getting a "whistle" from my amp???

I do have all of these on a single 8 outlet Onespot....I can mess with the power situation easily.

Like I said guys - Guitar straight into amp, with Zoom in FX loop = quiet.

Is there a power toy that might help here?

 

[Jacew]

Re: Getting a "whistle" from my amp???

I do have all of these on a single 8 outlet Onespot....I can mess with the power situation easily.

Like I said guys - Guitar straight into amp, with Zoom in FX loop = quiet.

Is there a power toy that might help here?

You mean the daisy-chain type one-spot?

For me it's been pretty much 50/50 chance of hiss or other weird effects when daisy chaining pedals. I vote for power issue.

Try if using separate adapters fixes the issue. Doesn't EHX usually ship with original adapter?

 

[VinceT]

Re: Getting a "whistle" from my amp???

Yeah, that sounds like digital pedal dumping high frequencies into the signal. Try each pedal on its own supply and see which one is the culprit.


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[Hsb]

Re: Getting a "whistle" from my amp???

Get a stand alone EHX power supply, bet problem goes away

 

[NegativeEase]

Re: Getting a "whistle" from my amp???

I do have all of these on a single 8 outlet Onespot....I can mess with the power situation easily.

Like I said guys - Guitar straight into amp, with Zoom in FX loop = quiet.

Is there a power toy that might help here?

Oh yeah, digital fx pedals on a power daisy chain can definitely produce a pinny whine. And the analog ODs will exaggerate it.

But a true "whistle" like a boiling kettle is almost certainly a tube in my experience.

 

[devastone]

Re: Getting a "whistle" from my amp???

Since it only does it when the EHX pedals are plugged in, I would try giving them their own supplies, the wah is kind of an outlier though.

 

[Mincer]

Re: Getting a "whistle" from my amp???

Try batteries, 1 effect at a time. I've never had an issue like this with the One Spot, but others have the exact issue you are describing.

 

[Aceman]

Re: Getting a "whistle" from my amp???

And the second I unplugged my Zoom multi-fx from the power chain - silence!

 

[Mincer]

Re: Getting a "whistle" from my amp???

Yeah, it isn't playing well. If you just use the Zoom, is it silent?

 

[devastone]

Re: Getting a "whistle" from my amp???

It's a grounding issue, lots of amps don't like it when effects in the loop share a power supply with effects in front. It seems like it shouldn't matter with a common ground, but it does, I think it's more from the effects than the amp.

 

[ehdwuld]

Re: Getting a "whistle" from my amp???

Zoom pedals are finicky beasts
I wont have one

 

[beaubrummels]

Re: Getting a "whistle" from my amp???

I do have all of these on a single 8 outlet Onespot....I can mess with the power situation easily.

Like I said guys - Guitar straight into amp, with Zoom in FX loop = quiet.

Is there a power toy that might help here?

I use an MXR ISO-brick for that problem.

But these days I too use a Zoom, but as my complete pedalboard with nothing else. One outlet. Less problems.

 

[Aceman]

Re: Getting a "whistle" from my amp???

Update:

It was definitely the EHX digital pedals. No way to get them to play nice with the Zoom.

Guitar > Pitch > Synth > Wah > Amp

Loop > Zoom > Loop

I went batter for the Pitch. It's really an emergency Key change device and I rarely use it - but awesome when I need it!
I went to three separate One Spots for Wah, Zoom, and Synth

All good now!