MOTM

... what BBD would you prefer?

I get quite a lot of requests for making pcbs for the Storm Tide flanger.

I can't do exactly that , for 3 reasons:

(1) It uses highly obsolete BBDs
(2) It's too close to Eventide
(3) I know a lot of things I'd do differently now.

But I'm (vaguely!) thinking about a "Son of Storm Tide" as a future pcb
project.

If I'd do this, I'd obviously not use SAD1024s.

I have a favorite vintage BBD chip of which considerable stock is left, so
I'd design it for this chip.
I'd want to have a fallback strategy in case this chip suddenly gets
extinct, and so my plan would be to offer a pcb where you have a choice of
two different BBD chips to solder in. (Similar as I did with the different
transitor arrays on the tau phaser.)

Now, I know what BBD chip option #1 would be (I won't tell right now, for
obvious reasons ...)

Please let me know what you'd prefer as option #2. (Should *not* be another
vintage / extinct specimen, but one of the modern parts.)

Preferred length is 512 stages.

JH.
_________________
CDs of my music available here:
http://www.lulu.com/jhaible

On 7/7/07, JH. put forth:

>If there's enough interest, this could be a project for a future PCB
>development. I wouldn't restrict this to Hammond emulation, but make a
>mono-in / stereo out device in the fashion of many Roland / Boss dual-BBD
>chorus circuits. Just without BBD. Let me know what you think ...

I don't think I'd be interested in the scanner chorus. While I'm
sure that getting it to work was quite an achievement, and it's short
delay time is uniquely impressive, imho, it's a bit too subtle for my
tastes. However, I would be be quite interested in a Roland
emulation dual-BBD PCB.

On 7/15/07, JH. put forth:

>Now, I know what BBD chip option #1 would be (I won't tell right now, for
>obvious reasons ...)
>
>Please let me know what you'd prefer as option #2. (Should *not* be another
>vintage / extinct specimen, but one of the modern parts.)
>
>Preferred length is 512 stages.

Curious, which BBD chips are currently in production?? As far as
single units with 512 stages, there was the Reticon SAD512 (which
came in 8 and 16-pin versions), the Phillips TDA 1022 (16-pin), and
the Panasonic MN3002, MN3204, and MN3304 (all 8-pin, afaik). I don't
think there are any others. I have heard conflicting opinions on
whether or not the MN series can be used as direct replacements for
the Reticon chips.

>Please let me know what you'd prefer as option #2. (Should *not* be another vintage / extinct >specimen, but one of the modern parts.)