Madbean Harbinger Noise Issue

[darrenw6000]

Just built this uni vibe, getting the effect but also a kind of static-y 'frying bacon' sound pulsing along with the effect. Power issue or something else?

[darrenw6000]

I'm using 18v to power

[Sburrell63]

I'm getting similar, corresponding to pulsing of lamp.  Is this similar to what you experienced and did you overcome this?  sb

[pmchi]

I'm also having that problem, there's  a hiss noise that pulsates with the lamp,  it's barely noticeable when I play clean stuff, but very noticeable and annoying when I play with gain pedals.   

[pmchi]

I just realized now that I used a 0.5W 15V zener diode instead of the 1W required.  Could that be the problem of my hiss noise? I don't know what a lower wattage  zener diode does to the circuit, Everything works though, only it's noisy.

[pmchi]

Fixed it!

it was the zener diode.  No noise anymore, now I can enjoy my fuzzface in peace.