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DIY Stompboxes => Building your own stompbox => Topic started by: fikri on April 09, 2007, 05:20:16 AM

Title: Mosfet booster Question
Post by: fikri on April 09, 2007, 05:20:16 AM
Hi, I needed a one knob clean preamp then someone suggest me to built the AMZ Mosfet booster. It is a very good booster. But i think i need a tone control. Can i just simply put a marshall tonestack before the output ? do i need a gain recovery or should i consider the ggg Fat booster ?

Thanks
Title: Re: Mosfet booster Question
Post by: mattpocket on April 09, 2007, 05:56:18 AM
If you wouldnt mind building another booster, we've all being hearing great things about the omega booster at ROG...

Otherwise try a search for the stupidly wonderful tone control... its simple to implement to any circuit...

Matt
Title: Re: Mosfet booster Question
Post by: darron on April 09, 2007, 07:33:27 AM
maybe just a simple bigmuff style one knob passive EQ would be worth a shot before making anything new?
Title: Re: Mosfet booster Question
Post by: MikeH on April 09, 2007, 09:05:10 AM
Yeah.  This booster has a good output, but I don't think it's enough for a full tone stack.  I'd suggest a simple low-pass type tone control.  Hook up the circuit output to lug 3 of a pot (10K-100K or so) and hook lug 2 to a cap (.1-.33 uf or so) and the other leg of the cap to ground.  This will allow you to roll off the high frequencies.
Title: Re: Mosfet booster Question
Post by: petemoore on April 09, 2007, 11:24:07 AM
I'd suggest a simple low-pass type tone control.  Hook up the circuit output to lug 3 of a pot (10K-100K or so) and hook lug 2 to a cap (.1-.33 uf or so) and the other leg of the cap to ground.  This will allow you to roll off the high frequencies.
  Other than on my amp, I have a few of this type of tone control sprinkled around my PB, I need another on the FF really, have one on the DIST+, another on Mosfet gain stage.  I find this type nice enough for my needs, in combination with carefully chosen or switchable input caps, the bass and treble amounts can be tuned to my liking...If I want a mid scoop or more control like that I use an EQ.
Title: Re: Mosfet booster Question
Post by: mattpocket on April 09, 2007, 04:39:04 PM
The wiki FAQ has some great passive tone control ideas... go to the FAQ and there is a link, something like "how to mod you pedals" or the like. Its one of the first links in the main body of the page.

The tone controls already suggested though should be more than good enough!

Matt
Title: Re: Mosfet booster Question
Post by: markm on April 09, 2007, 04:44:15 PM
Of course, backing the tone down on the guitar can help a bit too!  :icon_wink:
Title: Re: Mosfet booster Question
Post by: mattpocket on April 09, 2007, 04:48:18 PM
Speaking of that, I just got a fallen angel and put a new pickup in my PRS (a dimarzio super distortion p90) and the tone i way too high... my knob is right down to 2 or 3 all the time... its well weird...
Title: Re: Mosfet booster Question
Post by: boogietube on April 09, 2007, 06:15:13 PM
I've said it before and I'll say it again- Tonemender from Runoffgroove. The best clean boost with a killer tone stack. :icon_mrgreen:
Title: Re: Mosfet booster Question
Post by: fikri on April 10, 2007, 11:08:13 PM
Actually i want to have a full controll over the mid freq. is there any simple way to implement this ? thanks
Title: Re: Mosfet booster Question
Post by: petemoore on April 10, 2007, 11:29:54 PM
  Notch Filter.
  From SuperFuzz.
  IIRC it's the ground connection of the notch filter which can have a pot for amount of notch instead of just a switch.
  That and playing with the values should notch out the midranges you don't want in.
  Somewhere, probably in layouts, is a notch filter lifted from SF  and modded.
Title: Re: Mosfet booster Question
Post by: fikri on April 11, 2007, 05:57:30 AM
I have seen the Tonemender, i think it is preety good. Would it give enough output to act as a clean preamp ? does having an OPA2134 would give a nice result  ? Thanks