Help With Adding an After Burner to GGG TOCT Fuzz

[Anonymous]

I am trying to add an after burner to the octave footswitch of my General Guitar Gadgets TOCT Fuzz

The problem right now is that when I hook up 9V and ground to the after burner, the whole pedal stops working. By that I mean the led doesn’t come on and there is no signal when engaging the pedal. When I measure the voltage across the positive and negative terminals on the DC jack, I get basically nothing. When I disconnect 9V from the after burner, the pedal works again (except for the octave right now of course) and I get the expected 9V across the DC jack terminals. Any ideas?

Here’s a link to the TOCT layout and wiring diagram:

http://www.generalguitargadgets.com/pdf/ggg_toct_lo_dist_f.pdf

Here’s how I have it wired:

I know it’s a bit of a mess. But, the was the first pedal I ever made.

 

[Anonymous]

I mean After Blaster not After Burner

[Anonymous]

After some messing around, I have some new results.

I disconnected the LED wires. Doing this made the pedal operate again.

Then, I moved the wires I had connected to “I” and “O” to “IN” and “OUT”. This gets the After Blaster working.

As of now, the pedal is working and the After Blaster is working, but I have no LED working. Maybe I just cut the jumper I was using for CLR?

 

[Anonymous]

Cutting the jumper I was using for R5 didn’t fix the LED issue. The pedal functions, but no LED for the octave foot switch.

I could really use some help with this.

[Anonymous]

Well I figured this out all on my own. Hopefully this will help somebody out in the future.

To get the LED to work, I connected the positive LED coming from the main board to the LED hole on the After Blaster surrounded in white. Then, I connected the LED ground coming from the main board to the opposite end of the LED holes. The middle hole is empty.

[Anonymous]

Other build notes

I left R5 unpopulated

I used a 2N5457 for Q1. I found that a 3k resistor for R4 worked to get it within the specified range. I’m getting around 4.6V at Q1 drain.

Everything is working as intended. I’m using a momentary switch for the octave. When I step on it, I get the octave and boost and the LED comes on. I learned a lot from having to solve this by myself. However, I hope this will help save somebody some headaches in the future.

[Author]

Posts