Rebote Build report

[oldrocker]

I finished the circuit board and I'm only getting a clean signal.  The pots don't do anything at all.  I'm a little worried that I might have fried my PT2399 IC.   When I first put power to it I found 9 volts was going to pin 1.  I found a disconnected ground and when I fixed that I got the 5 volts.  Does anyone know if this would hurt the echo chip?

[oldschoolanalog]

The "absolute maximum rating" for V+ according to the manfacturers datasheet is 6.5 V. 

[oldrocker]

Well I didn't end up frying it.  Thank goodness.  I was able to get it working.  It sounds great and this will be a lot of fun to play around with.  My only problem is I already ordered two more echo chips which I don't need now.   Oh well at least it works.  I think it sounds good with my single coils and a little gritty with my humbuckers but that's no big deal.  Tonepad comes through again with a great schematic.

[geertjacobs]

If you have 2 more PT2399's, you could try to build the PT-80 and compare it side-by side with the Rebote...

[alfafalfa]

Geert ,

Did you build both ? And if so what are your findings ?
The Rebote 2.5 is next on my list !

Alfafalfa

[Gila_Crisis]

for opamps and transistor i never solder them directly on the board but i use sockets. so when i put them in i'm sure they are in the right position and if you must change them, it's a lot easier as well, don't need to desolder the whole thing!

[markm]

I gotta hand it to you oldrocker, that's a hell of a perfboard build!
Congratulations! 

[geertjacobs]

Geert ,

Did you build both ? And if so what are your findings ?

No, but I'm really curious so that's why I'm suggesting it.   

[oldrocker]

Well I'll have to look into the PT-80 and see if I have the parts on hand.  Does anyone know about the charge pump and if it the PT-80 works on 9 volts?   I have guest coming in to stay with me next week so I won't be pedal building until they leave.  Thanks Markm.  Well you're right.  It was challenging perfing it but it was well worth it.  I avoided building it for a while because I wasn't too sure I could do it without ordering a PCB for it.  I've gotten pretty good at perfing now and so I'm more apt to try and take on a more difficult build.  Although when it didn't work right away I got nervous having to debug it but thank heavens for the audio probe.  Man that's a life saver.  Thanks for the congrats.  And again thanks to zpyder for a layout that made it easier to accomplish.

[oldrocker]

for opamps and transistor i never solder them directly on the board but i use sockets. so when i put them in i'm sure they are in the right position and if you must change them, it's a lot easier as well, don't need to desolder the whole thing!

I almost always use sockets too.  Very rarely do i not use one.  I did socket the PT2399 and the TL072.  I even socketed the 78l05 too just because I was waiting for it to get shipped to me and I wanted to have the board built so could just plug it all in.  It all worked out in the end.

[boogietube]

The charge pump worksin the pt-80. 9v in 17 -17.5 v out.

[boogietube]

Oh yeah - If you don't have the compander for the pt-80- I have several collecting dust. E-mail me.
Sean