[sdiy] inductor source?

[Travis Shire]

----- Original Message ----- 
From: "David Moylan" <dave at westphila.net>
To: "diy" <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, December 12, 2006 11:55 PM
Subject: [sdiy] inductor source?


> I've had fixed filters on my mind a lot lately.  I built an effect pedal
> format LC filter box a few years ago that could do boost or cut at two
> frequencies simultaneously.  Each band had 12 possibilites.  It was
> essentially passive with make up gain and sounded fine but the topology
> limited the effective Q.  That didn't bother me too much as I was using
> it primarily for gentle shaping of guitar.
>
> I used a series LC circuit since in that case the Q is dependent on the
> L, so it would remain relatively constant when switching between caps.
> And the caps were wired in series around a rotary switch.  That's the
> way it's done in Orange amps and it seems to keep the pops down.
>
> It was built with samples I ordered from Wilco. I've been fooling around
> with it some more: increased the Q some which I liked.  Then, realizing
> I don't use the cut position much I changed the topology to only boost.
>  This is more in the fixed filter family since you get no signal with
> both knobs down.
>
> I like it a lot.  I can take a simple saw (with some LPF) and go from
> something akin to an upright bass to something that sounds like a mouth
> harp or rubber band to insect tones.  Since it seems effective and since
> the MOTM fixed filter is a dead project I think, I'd like to expand on
> my own little fixed filter.  I figure 3 or 4 switchable bands would be
> almost as useful as 10 single bands but where can I get 1H or larger
> inductors?  Judging from how hesitant Wilco is to give me a quote or
> tell me a minimum quantity they don't want to deal with small potatoes.
>  It's too bad.  I like these little shielded inductors.  Do they have
> distributors?  Are there any alternatives?  Or is there enough interest
> to try to get a group buy together?
>
> Yes, I know resonant filters can be made without inductors, but they
> make it so damn easy.  And aren't they more fun?  I haven't had any
> problems with hum pickup with these little Wilco BSL series.  Hopefully
> Harry doesn't feel about inductors the way he feels about BBDs...I can
> hear it now....
>
> Dave

I had the same problem with Wilco. I got some samples from them to check out
the quality for use as replacements in wah pedals. Sounded great. Wilco
doesn't seem to want to bother with you unless you buy in bazillion qty's.