[sdiy] Harry's Nightmare!

[harry bissell]

An all-tube BBD...

What a novel idea....

I'd like to suggest that you use the tubes as
high-impedance buffers for the hold caps.

You'll want really good isolation for the
switches, so why not use REED RELAYS...

Some of these can close in as little as 1mS....

so the frequency response will really SUCK !!!

But hey, all those relays clacking might be just
the thing to duplicate the realistic BBD "noise floor"

I say.... Go for IT !!!   ;^P

H^) harry

(this is what happens when I go out in the feild
on a service call... and return to find "harry's
nightmare" as a thread. Do I have to watch you guys
all the time ???)




--- John L Marshall <john.l.marshall at gte.net> wrote:
> Halloween has come and gone. Save it for next year.
> 
> ----- Original Message -----
> From: GothGeek Sysadmin <xyzzy at sysabend.org>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, November 07, 2001 9:03 PM
> Subject: [sdiy] Harry's Nightmare!
> 
> 
> > Anyone else on this list playing with Tubes?
> >
> > If interested, I found some old computer
> schematics and in them was a nice
> > simple sample/hold which I've ordered parts to try
> and build this weekend.
> >
> > Yes, you can see this one coming...
> >
> > I figure, heat withstanding, I can fit 10 of these
> on a single card.
> > I have several S100 chassis and can easily grab
> more so this is the size
> > I'm basing this on.  This means 100 in a chassis
> and approx 500 in a rack.
> > Not an extremely long delay time I realise but the
> sheer shock value of
> > this could be amusing ( quite literally! ).
> >
> > Yes! The mythical Tube BBD! *cackles evilly*
> >
> > Yes, I have gone insane.  Between hacking up my
> poor Minimoog, assembling
> > all the stuff I bought from EFM, fixing friends
> keyboards, and working on
> > two designs for equipment ( one a large step
> sequencer and one a larger
> > polyphonic synth ) *and* working my real job, I
> feel half braindead.
> > Anyone else have this problem?
> >
> > --
> > 
>
------------------------------------------------------------------------
> >  - Tom Arnold -       When I was small, I was in
> love,                  -
> >  - Sysabend   -       In love with everything.    
>                      -
> >  - CareTaker  -       And now there's only you... 
>                      -
> >  --------------         -- Thomas Dolby,
> "Cloudburst At Shingle Street" -
> >
> 
> 
> 


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