[sdiy] Ladder filter pole

[John L Marshall]

6AL5 has a maximum heater to cathode voltage of 330 volts. Probably not a
problem.

Take care,
John


----- Original Message -----
From: Magnus Danielson <cfmd at swipnet.se>
To: <harrybissell at prodigy.net>
Cc: <madhun2001 at yahoo.com>; <gene at ixiacom.com>;
<synth-diy at dropmix.xs4all.nl>
Sent: Friday, April 19, 2002 2:34 PM
Subject: Re: [sdiy] Ladder filter pole


> From: harry <harrybissell at prodigy.net>
> Subject: Re: [sdiy] Ladder filter pole
> Date: Thu, 18 Apr 2002 21:49:06 -0400
>
> > One of the difficulties with tubes would be the filiment voltages...
> >
> > It could be handled with isolated dc/dc converters.  These are often
> > used for H-bridge inverters (Motor Drives etc...)
>
> Well, there is many ways to handle it... experience will tell what works.
>
> > You silly boys....
>
> Really? :^)
>
> > OTOH a tube ladder would be a pretty cool project... send me some
> > piccys when you get it working
>
> If you think a tube ladder is silly, then think for a minute on the
> guy that made a tube-based DAC!
>
> I know he did an 8-bit DAC that he hooked to his computers
> parallel-port for test-purposes. His plan was for a stereo 16-bit
> thing. He *knew* it would not give the tube-character, he just wanted
> to do it since it was possible to do it. Go figure... ;O)
>
> You've gotta bend the things a little to learn something.
>
> Cheers,
> Magnus