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Scott Seidman  
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  More options Jul 8 2008, 6:27 pm
Newsgroups: sci.electronics.design
From: Scott Seidman <namdiestt...@mindspring.com>
Date: 8 Jul 2008 13:27:47 GMT
Local: Tues, Jul 8 2008 6:27 pm
Subject: Re: PCB power planes?
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Joerg <notthisjoerg...@removethispacbell.net> wrote in news:iUvck.14888
$N87.12...@nlpi068.nbdc.sbc.com:

> That would be way out of league for most of my designs.

It depends on how much you need a tunable filter, and how good you need it
to be.

I used to use a bank of these:
http://www.tucker.com/java/jsp/product_partno3202R_invid9608_condR.htm

At $500 per channel used for a 4-pole tunable filter, 4 bucks a channel for  
digital pots plus the UAF42 is quite a bargain.  Of course, you need to
build your serial bus and then write some code to support it, but still the
bargain.

--
Scott
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