Rebote Delay 2.5: FULL MODS THREAD

[Kipper4]

Always on / tails mod

So I got the Spdt NC NO  momentary switches in the post today like so

https://ae01.alicdn.com/kf/HTB1vmkpLVXXXXaAXXXXq6xXFXXXw/10pcs-Red-Cap-Momentary-NO-NC-3-Pin-Panel-Mount-Push-button-Switch-AC-250V-2A.jpg


Imagine my surpise at how its wired internally with the 2x outer lugs always open until the push.
On push an outer lug and the central lug are connected.

Will I ever get my head around switching.
I was scratching my bonce for a while, but It seems I got it right It all works as expected. Phew.....

[Kipper4]

Just for reference a switch is deamed open when the lugs connect right
and deamed closed when they are not connected
Right?

I have a 50% chance of getting this wrong.
Prey tell did I win a sausage?

[duck_arse]

have some ice-cream instead. and no, not right. open means no connection, closed means yes connection. [draw the circuit.]

it's marked right there on the body, so's you can't boob-it-up. the switching arm is pivoted at one end, so that end is common. expect the same w/ dpdt mom switches as well.

a momentary switch needs to identify which is closed normally and rich is open normally. not so a latching, which is "normally" in whatever state it is in *now*.

[Kipper4]

Thanks Duck

"it's marked right there on the body, so's you can't boob-it-up."

wanna bet?

I didnt see it was marked on the body. I never looked just tested with the beeper and drew some conclusions on how best to wire it.

I should have know.

[PRR]

Think of a knife switch, like Dr Frankenstein's lab.

You may say: this is backward to a garden gate. No, because we are not wiring a garden, we are allowing the duck to walk along the top of the fence, or not.

[Fp-www.Tonepad.com]

It sure makes me feel good to hear you guys still into the Rebote 2.5 (after only 12 years!)
Mod: clipping diodes from the wiper of wet level pot to ground is one I like. Also a tone pot (like a guitar tone pot) helps.

Rebote 2.5 schematic:
http://tonepad.com/project.asp?id=51

[vigilante397]

It sure makes me feel good to hear you guys still into the Rebote 2.5 (after only 12 years!)

Frankly it makes me feel good that Tonepad is still around! Thanks for all of your (continued) hard work!

[Ben N]

Hey, all bringing this back from the dead--has anyone ever done either a wet only mod or a set-dry mod (2 output jacks)? Wet only seems simple enough--an SPST at the 24k between the input and output opamp stages, or maybe a DPDT so that the mix pot can be bypassed, too. But separate wet and dry outputs -- that would be a bit more complicated, wouldn't it? Looking at a Boss DD-2, the dry-only jack is stereo, with the ring grounding the emitter of an NPN transistor that turns off an FET switch on the line feeding the "dry" (pre-emphasized) signal into the output mixer. The tip of the dry-only jack takes its signal from the transistor input buffer, not the preemphasis opamp.

[deaftone]

.. wrong thread.. please delete

[Aleenbahia]

Hi guys, reviving this old thread cause I recently build this little guy and wanted to try some of the several mods! (Already added a 10k pot plus 5k1 in series, but I realized that with the pot at minimum (15k, measured), it already goes oscillating like crazy, think I´ll add more resistance there...

It sure makes me feel good to hear you guys still into the Rebote 2.5 (after only 12 years!)
Mod: clipping diodes from the wiper of wet level pot to ground is one I like. Also a tone pot (like a guitar tone pot) helps.

Rebote 2.5 schematic:
http://tonepad.com/project.asp?id=51

Francisco, would you mind elaborating a little bit? Recomending a diode configuration? And where should the tone pot go?
Thaks for your work man!

[anotherjim]

You can nearly always calm feedback down by reducing the capacitor in the feedback path. I think you might have the 0.1uF after the 15k. Try changing that for 22nF. Reason is that bass content has the most energy and a smaller capacitor reduces just the bass.

[Aleenbahia]

You can nearly always calm feedback down by reducing the capacitor in the feedback path. I think you might have the 0.1uF after the 15k. Try changing that for 22nF. Reason is that bass content has the most energy and a smaller capacitor reduces just the bass.

I think I did just the opposite and resolved it! Put a tone control with 500k and 22nf (LPF) in the repeats (Vol wiper) and it calms it down a lot. Changed the "15k" mod also, put a switch choosing between 22k and 8k2. Digging it! Need to sit down and study the tails mod which is, for me, almost essencial in a delay!

[deadastronaut]

hi guys, just a heads up, i have a rebote 2.5 on the breadboard

just for fun and tinkering whilst i await pcbs for something else..

heres a rather nice and ultra simple mod for the pt2399 delays i just found on breadboard

put a 1M across pin 6 and 8 and you get 'chorus' on the delays....

it makes it just slightly 'wobble' but just enough to be very nice....nifty. try it. 

add it to a switch and voila' ...you have tape delay type chorusy stuff....quite lush actually

without the hassle and extra circuitry of adding an lfo...

nice and simple mod...just like me..

try it guys, seriously, its worth it to liven up an otherwise plain old pt2399 delay. 


i tried 680k to 1M....1M seems best, YMMV.  have fun.  happy new year everyone. 

[deadastronaut]

update : take a 1M from pin 6 to 8

and a 820K from pin 6 to 7.....uber lush . 

lovely for guitar swell spacey stuff... 

[solarplexus]

Would anybody be kind enough to show how to get two time pots mod with the Rebote 2.5 and how to wire the switch?  I am trying to do it but I have a hard time figuring it out, and it's probably very simple...

[solarplexus]

Would this work with the time pot?

[deadastronaut]

yes that should work....

will likely have a weird warp effect when switching times....which might add to it. 

personally i would choose to do this on a longer (2x pt2399) delay rather than the rebote single pt2399 though to be worth it. .....just my 2p. 

[solarplexus]

yes that should work....

will likely have a weird warp effect when switching times....which might add to it. 

personally i would choose to do this on a longer (2x pt2399) delay rather than the rebote single pt2399 though to be worth it. .....just my 2p.

Thanks for the reply.  I want to be able to switch from slap back delay to something around 400ms.  It's just for live use.  Easier to switch than to bend down while in a gig. 

I am also going to try to do that on the Echo Base which I have just finished (had the PCB unfinished since 2016).  Same thing, from slap back to about 400ms. 

Thanks again

[deadastronaut]

gotya, just be prepared for a little warp sound when switching timings.

have fun . 

[solarplexus]

gotya, just be prepared for a little warp sound when switching timings.

have fun . 

That's part of the fun