DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: bagudan on April 21, 2010, 04:54:59 PM

Title: maestro boomerang question
Post by: bagudan on April 21, 2010, 04:54:59 PM
Hi.
I ´ve made a boomerang from this layout. it´s working alright. But it seems to be distorting a bit. The soundsamples I´ve found were all very clean?
The distortion is more present with my middle or neck pickup, and especially in the heel-down position. I´ve tried different transistors for Q1 (bc109s,2n2222a´s,bc108´s) Even tried one with an hfe around 150. The distortion didn´t dissapear?
I used an inductor from a dunlop crybaby? I´m not shure if the inductor has alot to say, when it comes to gain and distortion?
Thanks
-Kasper
Title: Re: maestro boomerang question
Post by: Solidhex on April 21, 2010, 05:04:40 PM
You might want to try increasing the 120 ohm resistor off the emitter of Q1. Tack solder a 1k pot in its place and tweak till the distortion disappears. Replace with a fixed resistor.

--Brad
Title: Re: maestro boomerang question
Post by: B Tremblay on April 21, 2010, 05:11:57 PM
Here's what I ended up with after encountering distortion with the stock schematic.
(http://runoffgroove.com/noomerang.png)
Title: Re: maestro boomerang question
Post by: bagudan on April 21, 2010, 05:37:51 PM
thanks. i´ll give it a try right now
-Kasper
Title: Re: maestro boomerang question
Post by: bagudan on April 21, 2010, 05:57:21 PM
Worked like a charm. Settled for a 330 resistor. Thanks for the replies
-Kasper
Title: Re: maestro boomerang question
Post by: Paul Marossy on April 21, 2010, 06:55:35 PM
Quote from: B Tremblay on April 21, 2010, 05:11:57 PM
Here's what I ended up with after encountering distortion with the stock schematic.
(http://runoffgroove.com/noomerang.png)


I need to try this version sometime.