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Subject: FW: [motm] FFB options

From: "Adam Schabtach" <lists@...>
Date: 2009-02-13

This was sent to me directly but the author wrote to tell me that he intended it to go to the list (one of the only lists on the planet that doesn't have its Reply-To field set to the list address).
 
--Adam

From: ach_gott@... [mailto:ach_gott@...]
Sent: Friday, February 13, 2009 9:57 AM
To: lists@...
Subject: Re: [motm] FFB options

I'm also onboard for A.

But but but, how difficult would it be to:
- allow the individual builder to tune the bands
- allow the builder to specify the bandwidth, even if one trimpot controls all of the bands
- allow the user to stack pcbs.
- provide for breakouts per band on the pcb?

And one more question... When the ffbs are doubling the frequencies in the way that the existing mockup does, wouldn't you end up with wolf tones?

Cheers,
Eric Filson

Sent from my BlackBerry wireless handheld.

From: "Adam Schabtach"
Date: Fri, 13 Feb 2009 09:45:51 -0700
To: 'MOTM List'<motm@yahoogroups.com>
Subject: RE: [motm] FFB options

Definitely a) for me.
 
Just outta curiosity, though, has the following observation crossed anyone else's mind: FFB has 11 pots, two for the high-/low-pass filters. With the same number of pots (and panel space), you could built an EQ module with high/low shelving bands and three fully parametric bands (each with three knobs for frequency, bandwidth, and gain).
 
Personally I think such a module would be more useful than a bank of fixed-frequency filters, although I realize that they're two different animals and the FFB has more of a "classic" appeal.
 
--Adam

From: motm@yahoogroups. com [mailto:motm@ yahoogroups. com] On Behalf Of Paul Schreiber
Sent: Thursday, February 12, 2009 7:27 PM
To: MOTM List
Subject: [motm] FFB options

For those interested in the Fixed Filter Bank, would you prefer:

a) buy boards, front panel and pots "a la cart" (MOTM 2.0 style)

b) buy it all assembled, with the same pots but in SMT

The delivery times would be the same. Cost-wise, assume $100
more for the fully assembled.

Note that this module has a LOT of parts, probably close to 250.

Paul S.