Equalizer Project

Found a bare pcboard for a 6 band EQ at this URL.

http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=46&Itemid=26

Circuit uses thru-hole TL074 opamps, not SMD/SMT parts. I can set the band and center frequency controlled by each pot. Anything risky about this pcboard circuit?

Found this 8 band Stompbox EQ which looks promising at $30 plus
shipping.

http://www.musiciansfriend.com/product/Danelectro-DJ14-Fish-and-Chips-7Band-EQ-Pedal?sku=151873&src=3SOSWXXA

There is an old piece of software I used to illustrate the spectrum of
an unwanted background tone I heard in my hearing aids. Runs ok on WIN XP.

Spectrogram v5.17 (294kB)is the last SHAREWARE release of this program.

http://www.n0ss.net/index_k2.html

At same URL see tutorial "K2 crystal Filter Alignment using Spectrogram v5.1.7" K2 is a HAM radio kit.

I will be using these EQs in two ways to steepen band skirts.
1. In series with my multiband Radio Shack EQ

OR
2. Two of these EQs pcboards in series.

Dave_s