EBE DELAY

[deadastronaut]

Hi guys following on from the ''simple lush after chorus'' mod that you can do to a pt2399 delay thread
i finally finished it. i settled on a 1.5M and a 1000n cap from pin 6 to pin 8...

and here it is.. basically its a modded rebote 2.5 to have way over unity level on the delays, and easy runaway feedback/self osc too..and a little extra time....and of course the 'passive modulation' mod on/off..

its a cool little easy mod...

[antonis]

Just about the time wondering where this lazy guy is lost..

[deadastronaut]

    yeah been busy floating around in space doing bugger all lol....

[antonis]

Good job (as always), Rob..!! 

[deadastronaut]

cheers man....

[antonis]

Just a question..
(in all good faith..)

Applying good designer pracrice, like making R8 value same as the parallel equivalent of R7 & R11, doesn't also stand for R20..??
(I know for JFET input op-amps it makes no practical difference but I'm asking the reason for R20 particular value, which IMHO, should be about 3k3..)

[deadastronaut]

i just went with the old rebote 2.5 value for the vb on the second opamp.....

[antonis]

i just went with the old rebote 2.5 value for the vb on the second opamp.....

What a schlocky plagiarizer..!! 

[deadastronaut]

yep totally...lol.  why reinvent the wheel lol...

[duck_arse]

I have a question - why didn't you use a 1uF at C3 instead of 1000nF?

[also, C15 47uF on a Vreg output !!!!! the ST datasheet shows never more than 100nF.]

why EBE?

[antonis]

I have a question - why didn't you use a 1uF at C3 instead of 1000nF?

Cause he didn't know how to arrange the polarity of 1μF symbol..

[anotherjim]

why EBE?

Robs favourite power chord.

[Ben N]

But seriously folks--Rob, what'd you use/recommend for that 1u? (For that value, I always have to ask.) I'd like to try to retrofit to my Deep Blue clone (very close to the Rebote), but I may not be able to fit a 1u film in there. Truth is, I maynot be able to fit a switch, making the whole thing moot, but still.

[deadastronaut]

You could try a 1uf electro, with a 1.5M I guess....

Originally i had a 470n and 1M, 

Tack it onto the pin 6 and onto 8...just to test, see if it wobbles.

With the lower values it creates a ducking effect/ warble


EBE = extraterrestrial biological entity.   

[Ben N]

Wait - it's supposed to be polarized? 

[deadastronaut]

 No, i used a 1000n ( 105)  non polar...

I was just saying you could try a polarized and see how you get on..,

[antonis]

No, i used a 1000n ( 105)  non polar...
I was just saying you could try a polarized and see how you get on..,

How kind of you Rob to let other people blow up their own caps for your design sake..

[deadastronaut]

 

I did try electro on breadboard...no majic smoke or explosions lol..

But just found the 105 was nice and stable, and just the right amount of warble....