madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: gtangas on February 06, 2013, 07:37:58 PM

Title: Krankosaurus several doubts
Post by: gtangas on February 06, 2013, 07:37:58 PM
Hi guys

Yesterday arrived some material from tayda and finished my Krankosaurus

I'm having some sweeping noise from the pots 5kc (gain and boost) ... Bad pots?? No noise at all with the others pots

I bought in a local shop the zener diodes and they only ad the black ones, not the normal glass diodes. Do you think this fact cause any issue with the sound?

I'm not getting the sound like a few demos I heard from this box. I lacks something

All ready changed the C1 with a 22nf.... I know that the fact a few ceramic caps doesn't help...
Title: Re: Krankosaurus several doubts
Post by: midwayfair on February 06, 2013, 07:57:06 PM
Quote from: gtangas on February 06, 2013, 07:37:58 PM
Hi guys

Yesterday arrived some material from tayda and finished my Krankosaurus

I'm having some sweeping noise from the pots 5kc (gain and boost) ... Bad pots?? No noise at all with the others pots

I bought in a local shop the zener diodes and they only ad the black ones, not the normal glass diodes. Do you think this fact cause any issue with the sound?

I'm not getting the sound like a few demos I heard from this box. I lacks something

All ready changed the C1 with a 22nf.... I know that the fact a few ceramic caps doesn't help...


Both of these pots adjust bias, and, therefore are "Crackle OK."

The Zener diodes do not have any effect on the sound. They are there for static protection so the MOSFET doesn't get hurt by static discharge (this happens sometimes).
Title: Re: Krankosaurus several doubts
Post by: gtangas on February 06, 2013, 08:01:32 PM
Hi mwf

So it's normal this noise??
Title: Re: Krankosaurus several doubts
Post by: midwayfair on February 06, 2013, 09:06:13 PM
Quote from: gtangas on February 06, 2013, 08:01:32 PM
Hi mwf

So it's normal this noise??

yes, the noise is normal. Any time you have a control that adjusts the bias on a transistor, it will make scratching noises.
Title: Re: Krankosaurus several doubts
Post by: gtangas on February 07, 2013, 12:46:39 AM
After your reply I watch a video showing the same noise...

Ok... So another build with no problems hehehe

Now... Boxing it! Another challenge

Thx