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Projects => Build Reports => Topic started by: panchokunstmann on January 25, 2015, 08:32:22 PM

Title: Soft BB preamp
Post by: panchokunstmann on January 25, 2015, 08:32:22 PM
Long time without update.

is a BB Preamp slightly modified:

in the diode # 1: The modification is an old diffuse green led  versus 1N4148 diode. the green led sounds less compressed, more organic and less saturated but the 1N4148 diode also has its charms.

Well, I used a JRC4580D that also delivers a less compressed and more organic sound that JRC4558.

Also I changed the curve of potencimeters (Vol and Gain) for a logarithmic curve, I think it works much better than linear curve.
outside:
(https://lh3.googleusercontent.com/-zUnbGnm-ZNw/VLxYNrwuM8I/AAAAAAAAAek/qZlbY-5CXjU/w413-h551-no/2015-01-18.jpg)
(https://lh6.googleusercontent.com/-eQ70VpF-Hq4/VLxX9tlJd0I/AAAAAAAAAc8/xsmgZOF5vtU/w413-h551-no/2015-01-18.jpg)

yellow led :

(https://lh4.googleusercontent.com/-UndtOTl03gs/VLxYJ5COeGI/AAAAAAAAAeQ/wT73pKTTCdc/w413-h551-no/2015-01-18.jpg)



inside: ( as always, I'm not proud but I think I'm improving )

(https://lh4.googleusercontent.com/-R45O5CCwmtY/VLxYFCJtTiI/AAAAAAAAAds/JwbgOKDCzqo/w413-h551-no/2015-01-18.jpg)

(https://lh5.googleusercontent.com/-oD8wRUjZgk4/VLxYBVSplOI/AAAAAAAAAdQ/3db60Db1HtQ/w413-h551-no/2015-01-18.jpg)


regards

Title: Re: Soft BB preamp
Post by: Hogharry on January 25, 2015, 11:51:06 PM
I really like the way that you tweaked it to how you wanted it to sound.
Title: Re: Soft BB preamp
Post by: jubal81 on January 25, 2015, 11:55:43 PM
Clean & simple. I like it!
1N914 and ilk are my least favorite way to clip a signal. I bet the LED sounds great in there.
Title: Re: Soft BB preamp
Post by: Luke51411 on January 26, 2015, 03:26:42 AM
Simple but elegant an killer sounding I would imagine. Great build.
Title: Re: Soft BB preamp
Post by: Coda-effects on January 26, 2015, 10:51:16 AM
Very clean ! I like it a lot with this color scheme
Title: Re: Soft BB preamp
Post by: gtr2 on January 26, 2015, 12:07:08 PM
Well done!

Josh
Title: Re: Soft BB preamp
Post by: JoeDorcia on January 26, 2015, 12:41:29 PM
Oooo, very tempted to try the LED clipping in mine. Might socket and try a few different colours etc. Was it a 3mm diffuse you used?
Title: Re: Soft BB preamp
Post by: panchokunstmann on January 28, 2015, 01:29:38 AM
Quote from: JoeDorcia on January 26, 2015, 12:41:29 PM
Oooo, very tempted to try the LED clipping in mine. Might socket and try a few different colours etc. Was it a 3mm diffuse you used?

Thanks to all, really is very pleasant forum   8).


It is a 5mm led, I'll try different colors this weekend and some diodes that I have.

I'll tell you how everything is going

The pedal really sounds great, I love it