electro harmonix frequency multiplexer Blue BoX?>

Harry Bissell harrybissell at prodigy.net
Wed Aug 30 17:29:40 CEST 2000

The blue box is a curious beast indeed. I tried a spice simulation of a
"simplified" blue boxx...  with bipolar supplies and the single supply
removed.  Worked for SH!T  ! I think "how can this be ???"

Resimulated the 100% original circuit... it works very well. There is
in the power supply... probably an undocumented "hysteresis" for the
or perhaps some other feedback mechanism...

If you wish to clone it... make an exact copy.  I'm really very

Most designs have features that make you think that the original

1) Was VERY clever and is doing stuff so subtle YOU don't notice it
2) Was an absolute IDIOT.

I always assume #1 until proven wrong.  In this case I dont know if it
was planned the
way it is, or dicked with until it worked... your opinions ???

H^) harry

Scott Gravenhorst wrote:

> BonoVox9 at aol.com wrote:
> >what about the MXR Blue Box?
> I have one of these.  As said before and I believe in the manual as
> well, not for chords, however, what it does, it does very cleanly.
> My only complaint about the Blue Box is that it doesn't have a
> built in envelope follower.
> -- Scott Gravenhorst : On The Edge, but the Edge of What?
> -- Linux Rex, Linux Vobiscum  |  RedWebMail by RedStarWare
> -- FatMan: www.teklab.com/~chordman
> -- NonFatMan: members.xoom.com/_XMCM/chordman/index.html
> -- The 21st century does NOT start in the year 2000!!!

More information about the Synth-diy mailing list