Roland - AD-50 ( Double Beat ) [schematic]

[Nocentelli]

Ignore that last point, I misread the diagram on my tiny phone screen.

[jzilla]

Happy new year! Yes, diagram is ok now, but I would disconnect the two ring lugs on the jacks (but leave the input ring connected to power negative): This way, you only need to unplug the input to cut the battery power.

Thanks. I've been trying all day to understand this but can't figure it out! Do you mean disconnect the input and output jack sleeve connection? Sorry for being obtuse!

[jzilla]

Ignore that last point, I misread the diagram on my tiny phone screen.

Ha! I totally missed this post. Cool. Thanks again for your help. Can't wait to finish this build and hear this thing. ...This community is awesome.

[jzilla]

still plugging on this... no sound yet.

i just noticed that the vero layout says the pinout is CBE! is that right? which transistors is this layout using? i thought they were SC1000s which AFAIU are ECB.

thanks!
-j

[Nocentelli]

2N5088/9, 2N3904 pinout.

[jzilla]

Wiring Diagram v3:
[ Image ]
-j

WARNING: i got the battery/DC section wrong here. battery got VERY hot. still troubleshooting.

[Nocentelli]

Is it just a short on the switching dc jack through swapping ground a battery +ve? I've heard that can happen

[jzilla]

Is it just a short on the switching dc jack through swapping ground a battery +ve? I've heard that can happen

haha. yeah, i think so. looks like i connected battery neg to DC tip instead of DC sleeve. still no go on the pedal though! not even an LED light... tested the battery and it's good. double checked the wiring, checked the vero layout and electrolytics orientation. also used the MM to test the switch continuity!

i guess next step is to reflow all solder? even if the trannies were fried (will test those as well) the LED would still get power, right?

thanks!
-j

[jzilla]

i mean i connected bat neg to DC sleeve instead of DC tip. :/

[jzilla]

Resurrecting this thread after having given up for nearly two years.

Today I decided to take another stab. Turns out my issue is coming from the rotary switch. I really can't understand why. Attached is a picture of what I'm doing with it (mounted to another vero board to deal with space limitations). Maybe I need to ground it?

image.jpeg

Another thought I had is to use a small 3 way toggle instead.

Appreciate any suggestions!

Thanks!
-j

[jzilla]

P.S. Here's the rotary switch I'm using
http://smallbear-electronics.mybigcomme ... 1240801556

Thanks!
-j

[jzilla]

I think I'm close. I swapped out the rotary switch for a SP3T. That's working now.

But the LED only works when a battery is plugged in regardless of whether i'm using DC power or not. Would someone mind taking a quick look at my wiring diagram and tell me what I'm doing wrong? I keep hitting the wall of my knowledge, not hard to do.

AD50 Wiring Diagram v5.jpg

Hugely appreciated!
-j

[johnk]

i built one a while ago and i really dig this fuzz:

[johnk]

and here's my layout for it:

[jzilla]

Wow! That looks incredible. There is some real skill on this forum.

[jzilla]

Solved it! Here's the working wiring.
Cheers!
-j

AD50 Wiring v6.jpeg

[aishabag23]

Solved it! Here's the working wiring.
Cheers!
-j

AD50 Wiring v6.jpeg

Awesome! It always feels good to finally figure it out.

[jzilla]

Awesome! It always feels good to finally figure it out.

Thanks! It really does. I've learned a ton debugging this project.
-j