mn3207 bbd...what can i do with these?

[loss1234]

let me start by saying i have never made a bbd circuit before.

so i found these online (mn3207 with clock chip as well) and i ordered a few of these new production BBD chips from visual sound. But after I ordered them I started worrying that they wont be the right chip for what I want to make as I havent seen them in any schematics. (i guess it was an impulse buy)

anyone know of any good delay/flanger/chorus schematics that use these or something like these?

[Spratty]

You could build a Zombie Chorus. There is an mn3207 version...

Spratty

[funkyfarm]

I've understood it is a reissue of the beloved MN3007.
But works with different voltage (5v ?) and - as usally with reeditions - sounds more crappy/noisy than the original one.

(i'm no purist and hope this is all wrong)

(sorry)

[Sebo]

Hi:
I don't think that the MN3207 is a reissue of the MN3007, I think both was
originally made by Panasonic with the same functionality, but different
working voltages.
I bought some recently to make the DIM C, a clone of the Boss Dimension C
(do a search in the forum, there is thread about it).
But this chipset is used in a lot of stomp choruses.

[softfin]

If I remember correctly those were used in a lot of 80s-90s Ibanez analog choruses/ flangers. Shangai Belling still makes them under the name BL3207.
Please correct me if wrong.

[etaoin]

Indeed, the MN30xx and MN32xx are not interchangable.

[loss1234]

so i can make a dim c with these?

can you chain them to get a longer delay time? i am getting three so i figured i could try em out. they were only 3 bucks a piece which i think is cheap for a bbd. does anyone have any advice on other bbds to buy and where to get them cheaply for an analog delay?

thanks

[b-funk]

hi loss,

one clock chip (mn3101/mn3102) can drive 8192 stages. so, as the mn3207 has 1024 stages, you can drive 8 of them with one clock chip (maybe that´s just true for the mn300x series, and the mn320x series is a little different...).
i recently saw a schematic of chained panasonic bbds, but can´t remember where...
you can have a look at the mn3005, it´s a 4096 stage bbd, and with this chip you can create pretty long delays. it´s not cheap, though...

best wishes,

tobias.

ps: when i find the bbd-chain schema, i´ll post them here

[StephenGiles]

The Yamaha E1010 delay perhaps which uses 4 MN3005.

[b-funk]

not really, it was another device...

but i completely forgot about the e1010 and the e1005 (uses 2x mn3005 and 1x mn3004)...

has anyone the scheamtics for those? looks like a cool clone-project...

best wishes,

tobias

[StephenGiles]

[b-funk]

mr giles,

thank you very, very much

definitley the time for me has come to start cloning...


best wishes,

tobias

[StephenGiles]

I got that circuit back in the 80s by writing a letter (remember them!!) to Yamaha.

[b-funk]

a l.. a lett... letter?

what´s that?