Rebote 2.5

[Nolind]

I have just built the Tonepad Rebote 2.5 delay. The circuit works fine and sounds sort of O.K but the repeats are by no stretch of the imagination clean particularly when using the crunch channel on my Laney MDX120. The clean channel is better but the repeats are accompanied by an increase in noise.   I have tried patching the circuit to the FX send and return and it works perfectly so it seems to me that there is some sort of impedence missmatch when daisy chained with the other effects and plugged into the amp's input.   I have tried it without the other effects too but it's still no better.

Has anyone else had this problem?

Is reverb / delay best run after the pre-amp via the fx send and return?


Does anyone know where I can get a schematic for the Laney MDX120?
I've tried googling but I just end up on dodgy sites.

Does anyone know of a better reverb / delay?

[Sanguinicus]

That's simply the nature of modulation effects. Think about it like this: delay with high gain cranked will make everything fed to it high gain. You're effectively "overdriving the delay effect", what you want to do it "delay the overdrive effect".

Use the effects loop.

[Sanguinicus]

That probably didn't make sense. Basically, if you put it in the effects loop, you're adding the effect after the preamp and after the gain is added. Time-based and modulation effects best work this way. I'm not sure how else to explain it hehe.

[jasperoosthoek]

What sanguinicus said is most likely the problem.

But could you try it with a battery  and without the other effects? So guitar-rebote-amp. That way you make sure that it's other issue. For instance a ground loop or power supply noise.

Having the delay before a high gain preamp will make delayed notes modulate notes played right now. That would probably sound a bit mushy. Haven't tried it myself. The rebote has a cheap PT2399 chip. If you want HiFi them check out the TC Electronic products. I've heard the Nova Repeater is very good.

Brian May is famous for his delays. Check for instance the Queen song Brighton Rock. What he did was have three sets of Vox AC30 amps. One set for 'now', one for the first delay and one for the second delay. Each set equals three amps, so a total of nine amps!

[Nolind]

Thanks for the replies.  You're pretty much confirming my conclusion.  I will build the enclosure to sit on the amp rather than on the floor then.  That just creates a problem footswitch wise. Running a signal cable to a footswitch and back is not very clevver.    Perhaps I should do this with a relay    I think what I'm really after though is proper analogue reverb and the only sensible way to do that is with a spring reverb unit.   Can a spring unit be pluged into the effects send and return or does it need a separate module? 

[Sanguinicus]

Spring reverb will work fine the effects loop. You can have effects loop effects on your pedal board easily.  try to find cable that has two coax type conductors down the middle of it. Or get two instrument cables and use spiral cable wrap to keep them together. 

[twabelljr]

try to find cable that has two coax type conductors down the middle of it.

Good idea. MCM in One offers alot of these types of cables.