Help, Any body know of a "BBD" free Flanger

[solderman]

Hi
I would appreciate some help here .

I have been looking around to find a good flanger project. The problem is that every ware I find one ,like the Electric Mistress etc, they are designed around BBD:s that are hard to find or incredibly expensive like the LM3007 or the SAD1024A. Or some combined digital IC like the FV1. I am aware of that some kind of delay circut is needed.  A simple circut that would fit in a 1590A enclosure wold be bingo but I assume that is impossible.

Ps. not even Smallbear have the SAD1024A and some BBD:s are around €10, (~$14)

Thanks
//Solderman

   

[Mark Hammer]

Although they do not sound exactly like flangers, when phasers start to have 10 or more stages (i.e., 5 or more notches produced), they begin to sound a bit like flangers.  But that's as far as it gets in the analog world.  If you want a low-cost time-based rpocessor, then you are advised to get into digital and explore some of the chips discussed in the digital effects forum here, like the FV-1.

That being said, the 3207 is available from multiple sources, like Beiling and Coolaudio, and is the basis for not only the Boss BF-2 but many other flangers as well.

As for fitting in a 1590A, your instincts are correct; just too much stuff to fit in there unless you use 1/8w resistors, tiny caps, and either SIP or SMT chips.

[earthtonesaudio]

I'm interested in getting into flanger design also... but I've been trying to find a "user friendly" digital delay chip like the pt2399 that will do shorter delays.  I know the pt2396 and other Princeton Technologies chips are out there, but they're all about 20-30ms minimum delay, none seem to get down to the 1ms delay range.

A digital delay chip with analog i/o, delay times from 0.1 to 10ms, and onboard clock seems to be a pretty niche item though.

[alex frias]

Talking about digital, what about using a DSP system? There are few options not that expensive anyway...

One thing I would like to try is put two PT2399 to achieve an TZF flanging device, one PT for the modulated delay and the other fo a stacic delayed signal, it could in some way lessen the delay time to get a typical flanger effect, I think. Just a thought...

[oskar]

Talking about digital, what about using a DSP system? There are few options not that expensive anyway...

That's tempting but with a rather big threshold to get started.

I paged through a pocketsize book by this guy Penfold in a Library ( incidentally Stockholms stadsbibliotek/Odenplan     ( Soldermans turf...  )), and he had a solution for 1-bit sampling in it which I had never seen before(in a delay unit). I believe the input was compared (litterally with a comparator) with a really fast ramp (~500kHz?) or triangle wave, Class-D amplifyer style. The output then being a one bit digital sample. So the brutally low resolution of the sample is saved by the high sample rate. I don't know the + and - of this solution or if this is used in a commercial unit anywhere.

[Thomeeque]

One thing I would like to try is put two PT2399 to achieve an TZF flanging device, one PT for the modulated delay and the other fo a stacic delayed signal, it could in some way lessen the delay time to get a typical flanger effect, I think. Just a thought...

http://www.diystompboxes.com/smfforum/index.php?topic=72648.0

[solderman]

Thanks all
It's like i thought, its hard to find a easy supst for the BDD:s so there is noting left but pay the price or design some thing. I have piked on the datasheets for PT99xx but have not the the level of knowledge to get it together jet.
most say i really liked the 2 X PT2399 sound in the youtube link. I happen to have two in stock from my shrinked delay project so Ill maybe start there.

Cheers
\\Solderman