Simple BBD circuit?

[allesz]

I'd say a reverb spring generated a delay, too.


(or, leave a message on the teacher's answering machine.)

I remember an old effect that simulated delay by applying tremolo on spring reverb... nice idea, but difficul to squeeze in small boxes; the same applies to oil cans delay.

Some 3208 and 3102 are on their way to my home  I choose them because they are 9V ready, I cant't wait to roast them.

[snap]

Thanks again everyone for your input.
Think i'll go for an MN3008 after reading through all your replies. The actual project brief is to compare three different kinds of delay, so I'm building this BBD based circuit as well and a circuit using the PT2399 and one using a programmed PIC.
I think i'll try and do something close to the application circuit on the 3008's datasheet (for the sake of simplicity), and aim for 100ms delay time.
Can anyone tell me if the internal topology of the MN3008 is similar to the MN3007 (i.e. is is just two 3007's cascaded together)? There is a lot of useful stuff concerning the 3007 on the Electrosmash site but not much regarding the 3008.
I may have more questions as this project progresses.
Cheers.

The internal of a MN3008 is even simpler than 2 cascaded 3007`s:
it just has twice as many "buckets" between the input and output pins.
So the `8 is a stretched `7, which produces 2 times the delaytime for the same clock-frequency.

[allesz]

Ok, parts were delivered this morning and tonight i breadborded the super simple schem...
It is very noisy, but I ear a faint reverb inside the noise. Did not try the v3205, only the bn3208.
I think I will work on scruffie's adaptation of the eh double tracking, and see how in turns out... and I thought the pt2399 was a difficult beast...

[allesz]

This morning, wile helping kids doing homework, I breadboarded again marteen's schem with a 3205.
Added some gain and a filter cap to the ouput buffer, and put another transistor buffer, and more filtering, to the delayed signal.
I got around 150 ms of analo delay!
Monday I will try to post a dirty schem..

[allesz]

http://i58.tinypic.com/2jbv7sm.jpg

[allesz]

[allesz]

Sorry for the triple post, I have always problem posting files.
The circuit I posted works nicely up to a point: when you increase too much the time (100k pot between pins 6 and 7 of the 3102) it gets very noisy and the wining gets annoying. If you stay in the range of around 100 msec it is good.
I am trying to find a way to get more repeats.... but it's not so easy, and I will start a new tread about it.