I plan to make PCBs for a modern version of these classic filter banks. You can either use real inductors, or low-noise GIC inductance simulations. You will need 2 PCBs for a 10-Band version (907), or 3 PCBs for a 14-Band version (914). PCB will have on-board power supply, or can run from +/-15V or +/-12V DC. You can choose between classic discrete driver and summing amp, or opamp driver and summing amp. Preview here: http://www.jhaible.de/ffb/fixed_filter_bank.html JH.
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Fixed Filter Bank (907 and 914-Style)
2010-04-10 by JH.