[sdiy] Noob Question: Passive Filter Design

[JH.]

Thanks for these links!
At first I wanted to say "too expensive", until I found the VTB9047. That's a pretty good price for a readily assembled and stuffed 
RM core. Looks very much like what I wound myself for some other projects, and the N48 core material they are using looks right, 
too:

http://www.epcos.com/web/generator/Web/Sections/ProductCatalog/Ferrites/Materials/PDF/PDF__N48,property=Data__en.pdf;/PDF_N48.pdf

JH.


----- Original Message ----- 
From: "Cary Roberts" <cary.roberts at retrosynth.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, May 05, 2010 10:41 PM
Subject: Re: [sdiy] Noob Question: Passive Filter Design


>> Then think how long it would take you to wind them by hand.
>
>Hm, four inductor have 4 Henries, that's hefty. But then, JH's filter
>bank has two with 5 Henries.

The Carnhill VTB9047 is a multitap 5.1H inductor.  Available from Audio
maintenance here:


http://www.audiomaintenance.com/acatalog/Transformers_and_Inductors.html

Specs here:


http://www.keepandshare.com/doc/1216566/carnhill-mechanical-datas-2-9-meg?da
=y


There's a whole range of multitap inductors used in Neve gear.  I'm guessing
they'd work fine in the filter bank.

-Cary

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