[sdiy] TomG's 9v diode ladder VCF

[DCMagnuson at aol.com]

In a message dated 4/12/01 10:51:00 AM Eastern Daylight Time, 
paia2720 at hotmail.com writes:

> You might want to consider a chip like the MAD1108 which has 8 diodes
>  in it. Diode PAIRS need to be matched... not the diodes in one "leg"
>  
>  TomG's pc board for the diode ladder filter is not layed out this way. I'm 
>  gonna hack it to be "improved" one day... but it works OK without
>  any matching as well...

I have one of Tom G's VCF-6's, and I used no diode matching at all (I used 
1N914's) .  The filter sounds good to my ears, but I don't have a matched VCF 
to compare it to.  

That said, I still prefer the sound of my 3046-based transistor ladder VCF.  
Does anyone know if the lack of diode matching could be the reason?  IE: what 
will the effects be because I did not match my diodes?

Dave Magnuson