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

[JH.]

A General Impedance Converter.

JH.


----- Original Message ----- 
From: "cheater cheater" <cheater00 at gmail.com>
To: "JH." <jhaible at debitel.net>
Cc: "Ingo Debus" <igg.debus at t-online.de>; "synth diy" <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, April 11, 2010 7:10 PM
Subject: Re: [sdiy] Fixed Filter Bank (907 and 914-Style)


Hi Juergen,
what's a GIC?

Thanks
D.

On Sun, Apr 11, 2010 at 17:11, JH. <jhaible at debitel.net> wrote:
> 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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