is thier away get ride of the hum and hiss in this fuzz schematic?????

prorms · 17th January 2008, 12:27 AM

is thier away get ride of the hum and hiss in this fuzz schematic?????

it just a simple fuzz stomp box schematic

when you turn up 3/4 way gets realy bad

poobah · 17th January 2008, 01:21 AM

I can't speak to the hiss... but the hum is coming from your guitar or the environment.

The circuit MAY be happier in a metal box.

As far the the guitar is concerned... that's why they make humbuckers...

Geek · 17th January 2008, 07:56 AM

Hi,

Emitter-to-ground for a 2N5088 is baaaaad. Their beta is way too high (I've measured them up to 600!). You need an emitter resistor (bypassed) to control it. That'll drop your hiss by a good 20dB+.

Also, you want your output cap on the other side of that 1K resistor and reverse the polarity of both the input and output cap.

Cheers!

karahara · 21st January 2008, 09:27 AM

You might know this site: Generalguitargadgets
There are some good infos and schematics.
With a fuzz you'll always have a lot of noise and hiss. You could use a noise gate to have silence while not playing.

tINY · 8th February 2008, 07:10 AM

Without and emitter resistor on the first stage, you're probably loading your guitar pick-up down pretty hard too.

With an resistor of 750 - 1.5k on the emitter, you'll have a lot higher input impedance.

-tINY

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17th January 2008, 01:21 AM	#2
poobah diyAudio Member Join Date: Nov 2005	I can't speak to the hiss... but the hum is coming from your guitar or the environment. The circuit MAY be happier in a metal box. As far the the guitar is concerned... that's why they make humbuckers...

17th January 2008, 07:56 AM	#3
Geek diyAudio Member Join Date: Sep 2004	Hi, Emitter-to-ground for a 2N5088 is baaaaad. Their beta is way too high (I've measured them up to 600!). You need an emitter resistor (bypassed) to control it. That'll drop your hiss by a good 20dB+. Also, you want your output cap on the other side of that 1K resistor and reverse the polarity of both the input and output cap. Cheers!

21st January 2008, 09:27 AM	#4
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	You might know this site: Generalguitargadgets There are some good infos and schematics. With a fuzz you'll always have a lot of noise and hiss. You could use a noise gate to have silence while not playing.

8th February 2008, 07:10 AM	#5
tINY diyAudio Member Join Date: Jun 2007	Without and emitter resistor on the first stage, you're probably loading your guitar pick-up down pretty hard too. With an resistor of 750 - 1.5k on the emitter, you'll have a lot higher input impedance. -tINY

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