Help with Rebote 2 delay

Started by JackLondon, April 11, 2010, 12:55:27 PM

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JackLondon

Hi Guys,

I'm having abit of trouble with this :(

1.What does it do, not do, and sound like? Signal audible in bypass and when engaged but there's no delay
2.Name of the circuit = rebote 2 delay from tonepad
3.Source of the circuit (URL of schematic or project) = http://www.tonepad.com/project.asp?id=27
4.Any modifications to the circuit?  No
5.Any parts substitutions? If yes, list them.  5pF cap changed to 4.7pF
6.Positive ground to negative ground conversion?  No
7.What is the out of circuit battery voltage? => 8.73

Voltage at the circuit board end of the red battery lead = 8.73
Voltage at the circuit board end of the black battery lead = 0


IC1
P1 7.93
P2 3.95
P3 0
P4 0
P5 0
P6 0
P7 0
P8 0
P9 3.96
P10 3.97
P11 3.96
P12 3.96
P13 3.96
P14 3.97
P15 3.96
P16 3.96
IC2
P1 4.37
P2 4.37
P3 4.32
P4 0
P5 3.26
P6 4
P7 4.38
P8 8.74

I read reports from other people who say they get delay at pin 15 of the IC1 however with mine it's not there.

Cheers for any help
Jack

JackLondon

I did check the wiring and it seems fine, but here's a pic in case I'm blind


.Mike

#2
Pin 1 of the PT2399 should be at 5V, which it gets straight from the regulator (IC3). Yours is 7.93V. That is definitely going to be a problem, since the PT2399 max voltage is 6.5V.

I would try to solve that problem first before troubleshooting why there is no delay. :)

Edit: Now that you posted a pic... in your image, the flat spot on the regulator is facing away from the PT2399. In the Tonepad layout, the flat spot is facing towards the PT2399. Definitely check the pinout of the regulator to make sure you have it oriented properly.

Mike
If you're not doing it for yourself, it's not DIY. ;)

My effects site: Just one more build... | My website: America's Debate.

therecordingart

I actually just finished building one of these two days ago. I screwed up my bypass switch wiring trying to rush to finish. I'd double check for the more obvious stuff first...the orientation of the 5v regulator, polarized caps, solder bridges, bypass switch, etc.

Renegadrian

#4
Voltage of the battery = 8.22

IC1
P1 4.95
P2 2.47
P3 0
P4 0
P5 2.84
P6 2.48
P7 0.20
P8 0.70
P9 2.48
P10 2.48
P11 2.48
P12 2.48
P13 2.48
P14 2.48
P15 2.48
P16 2.48
IC2
P1 3.63
P2 4.10
P3 4.06
P4 0
P5 3.09
P6 3.78
P7 4.10
P8 8.22


EDIT Yeah I had trouble with my last rebote 2 - I used my verified layout, and had a problem with the dry signal. Guess what, a resistor in the wrong holes and that's it...As I cannot delete my post, I'll keep the voltages for further reference, may someone need them in the future...
Done an' workin'=Too many to mention - Tube addict!