Built my first...radio?

[nex_06]

Ok, I'v built electronics like this before, but never a stompbox, so this is uncharted waters for me.  I spent all day building the Bazz Fuss deluxe from this page and it does work, makes a great fuzz sound.  My only problem is that I can clearly hear a radio station coming in through my amp when using it above around 25% volume.  I have everything grounded (jacks, pots, etc.) and it is all inside a metal box, so I thought it would be shielded, but apparently not.  Can anyone help me out at all?

As an aside, could someone point me toward a page on how to connect a DC9v jack to the circuit?  I'v tried to use the search, but to no avail...

[petemoore]

Even when I'm using metal jacks, occasionally I like to test that the box is actually seeing ground with the DMM.
 Long input / output wires?
 I'ts hard to tell exactly what is the reciever, I 'added' antenna here and there in a FF once, and used a small cap [input to ground] to de-activate the tuner.
 Sometimes a 'carefully placed' [try different approaches] little cap is enough to squelch RF reception.

[nex_06]

Thanks, I'll certainly give it a shot.

[radio]

In a certain manner you did,google for detector radio

those where common before WW2.

The diode was the main component.

I have to guess either you have multiple grounds

but no earth,or are really close to a radio station.

Try a different room,to eliminate the last possibility.

Connect ground to radiator(no joke) these are

earthed all over the world in the same natural way :wink:

Regards JMErnzer

[darkseid]

High and Low pass filters
http://www.generalguitargadgets.com/richardo/distortion/index.html

about the DC9v jacks, look up some layouts ... There is a few ways to hooking them up.
http://www.generalguitargadgets.com/diagrams/dist_250_lo.gif

[nex_06]

What classifies as a small cap?  around 1 uF or 100 pf?

We are really close to a radio station though, its like 5 blocks away, big station.

[Hal]

What classifies as a small cap?  around 1 uF or 100 pf?

We are really close to a radio station though, its like 5 blocks away, big station.

[doug deeper]

HA!

[darkseid]

haha Hal.... that is the perfect solution.

What classifies as a small cap?  around 1 uF or 100 pf?

We are really close to a radio station though, its like 5 blocks away, big station.

capacitor = 1/(2 * PI * resistor * frequency Hz) = roll-off frequency

The maximum could be 1,000 pF

Filters will roll off the frequencies we don't want to amplify

Is the station AM?  What is the frequency?  I'm just curious, but not going to do the math lol.  But if its that close you may need something like this http://www.jensen-transformers.com/as/as072.pdf  only in extreme cases I bet

I have been self studying electronics online for the last four months.  I'm kind of overwhelmed about what I learned so far lol...   I may be wrong on this hehe

I do know placing a cap or an RC in the circuit might do the trick......

[nex_06]

The station is 1230 AM

I put a .001 uF cap from the signal in to ground, still works great and no radio, thanks!