Hum on my diy stompbox.

[Bigbizkit]

Hi guys,
What sould i do to eliminate hum on my effects stompbox. I use orange squeezer and colorsound bass fuzz, when i use both fx, it generates hum, especially on hi volume, the hum gets louder too. I use a very simple diy power supply an adjustable 3A regulated power supply that uses lm317.

[Elijah-Baley]

You are talking about hum while the effects are engaged, right?

Bazz fuss, as any distortion pedal, generates some hum. (Actually mine is rather silent.)
Compressors enhance the noise.

What is your guitar?
Didi you try something else power supply, or even batteries?

[CodeMonk]

I did a simple search but right noe I'm also to tired to draw one up.
But read this thread i get an idea. (oops forgot the link, jsut do a search on power filtering)
Not only do you need regulated power, but you also need FILTERING
Sometimes something as simple as a 47uF Elelctro cap from the 9V power source(+ on cap goes to power source - goes to ground) and ground and aaybe even a 100nf ceramic cap in parallel with that wil do the trick.

Also search for
'Polarity protection" here as that often also include the power filtering info as well.

Here is one link. First post
http://www.diystompboxes.com/smfforum/index.php?topic=112181.msg1034353#msg1034353

For simplification, looks into trying the 3rd one or 1st on (in that order) first.
You could even replace D1 in the first one with D3 in the third one.
A 47uF electro cap is usually good enough.

And yes, like Elijah-Baley there said, compressors can sometimes often add some noise.