[sdiy] Hollow low-pressure ladder filter

[John L Marshall]

----- Original Message -----
From: Tim Ressel <madhun2001 at yahoo.com>
To: Synth-Diy <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, April 28, 2002 2:07 AM
Subject: [sdiy] Hollow low-pressure ladder filter


> Yo,
>
> My 6AL5s finally arrived. Tomorrow, neurons willing, I
> will bang together a diode version of a ladder filter.
> The advantage is: no high voltage. +/- 15V should be
> enough to run it.
>
> Now for the bad news: the 6AL5s are military tubes. So
> any music mafe with this filter will come out sounding
> like a march  ;-)

Or, maybe the staccatos of a machine gun?
>
> More 12AU7s and filament transformers are on the way
> for the triode version. Or should I use pentodes to
> satisfy those ultra-linear purists out there?

The triode ladder looks like a look like a grounded grid circuit to me.
Pentodes aren't necessary. But then, the purists will never agree. Keep us
posted.
>
> --TR
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Health - your guide to health and wellness
> http://health.yahoo.com
>