EHX Holy Grail Reverb- Whine

[sirbergersworth]

Anyone know of a mod to stop the crazy whine I get with my EHX Holy Grail Reverb?
It works fine in the effects loop of my tweaker15, but my vht special 6 head does not have a loop and it whines like crazy when in front of either amp.
Any ideas?

[Loztboy]

Is it the big or small box? I have tested both, and the big box was a little more noisy, but no whine.
What are you powering it with?

[sirbergersworth]

Big box and powering it with the original power supply.



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[selfdestroyer]

Check your power supply with a DMM. I had this issue and it ended up being the PS. I have the large box version also.

[sirbergersworth]

Thanks. I will check it.
What was wrong with the power supply?


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[selfdestroyer]

Thanks. I will check it.
What was wrong with the power supply?


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Mine was not putting out enough voltage and it was starving the pedal.

[sirbergersworth]

Thanks. I will check it.
What was wrong with the power supply?


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Mine was not putting out enough voltage and it was starving the pedal.

thank you


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[sirbergersworth]

My ehx power supply is rated 9v 500ma
I am getting 12.5 volts and 4.4 amps. Not sure but I think that equates to 4400ma?
So it could be putting out to much amps?


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[selfdestroyer]

My ehx power supply is rated 9v 500ma
I am getting 12.5 volts and 4.4 amps. Not sure but I think that equates to 4400ma?
So it could be putting out to much amps?


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Sounds like you found your problem.

[Effectsiation]

Yeah that pedal is very power supply specific, various noise occurs if you somehow end up giving it something different than what it wants, at least in my experience.

[sirbergersworth]

Yeah that pedal is very power supply specific, various noise occurs if you somehow end up giving it something different than what it wants, at least in my experience.

I guess a new power supply is in order.
Thanks everyone.
It is funny that it doesn't whine when in the effects loop.


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