[sdiy] Fixed Filter Bank (907 and 914-Style)

[JH.]

I have used RM cores like this in th epast, for other projects:
http://de.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=0180783
It's true, it's not difficult to wind your own inductors, even if they require something like 500 turns.
But it's time-consuming, and kind of expensive. For each channel, you need two inductors.

I'll probably build my own prototypes as an active version only, and leave it to others to make a real-inductor based version. Over 
the last two years, I got accustomed to the fact that there are always some diy-ers who use my PCBs to build something way better 
than my own prototype. :)

JH.


----- Original Message ----- 
From: "Ingo Debus" <igg.debus at t-online.de>
To: "synth diy" <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, April 11, 2010 4:40 PM
Subject: Re: [sdiy] Fixed Filter Bank (907 and 914-Style)



Am 10.04.2010 um 22:19 schrieb JH.:

> 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).

Very interesting! What kind of inductors will be needed (if real ones
are used)?

I just started building filters with DIY pot-core inductors. Winding
these isn't difficult at all.

Ingo
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