NEW ISSUES!
I did this mod http://users.telenet.be/orangefg/pulsar_pcb_fix.gif
And I also found that I forgot a resistor...somehow the pedal worked decently..strange...
Anyways...

Now the pedal works great except for one huge problem. The signal is a LOT weaker when the pedal is engaged.
What would be the issue here? I've done a couple quick checks for solder bridges and what not, haven't measured any voltages, it sounds like the pedal is working fine just way lower volume. Which just doesn't work.

Any suggestion?
Thanks guys-

Elliot





Original Post:
I hooked it up with my breadboard (first time doing this...yay for simplicity!)
And got it working.
Question 1:I'm using a spdt on-off-on switch for the "chop" switch. Does this cause a problem? It's just an extra switch I had lyin' around so I tried it out...
Question 2:This pedal sounds very subtle to me. Is there a way to increase something and make the thing more present?
I want it to sound like this guy...
http://www.youtube.com/watch?v=-6Tlpf7Ky48

I want to be able to make it so it can get extremely choppy if at all possible.

I was surfin through build reports on tonepad and found this mod-- http://users.telenet.be/orangefg/pulsar_pcb_fix.gif
and also someone said switching the rate to a 10k linear pot is a good choice, but they didn't say what it changed...
The 10k pot substitution doesn't make much sense to me, seeing as it has a 100k pot right now, and I always feel that the lower the resistance the less effect the pot will have..? However, I'm an ignorant fool, so this could be a bad assumption.

Any and all suggestions are welcome/encouraged.
Thanks!

-Elliot

I presume the chop makes the LFO a square wave instead of a Sine/Triangle whatever.

You could have a switch where the lfo is and have a pair of diodes clip it. If you had a gain stage just for the clipping of the oscillator you could put in a pot mix between how "sine-y" and how square it would be!

Change R6 to 1K.

Quote from: Jazznoise on February 17, 2011, 07:03:36 PM
I presume the chop makes the LFO a square wave instead of a Sine/Triangle whatever.

You could have a switch where the lfo is and have a pair of diodes clip it. If you had a gain stage just for the clipping of the oscillator you could put in a pot mix between how "sine-y" and how square it would be!

Sounds like too much for me to handle right now, but thanks for the advice! Definitely will be a project for the next build.

Quote from: PRR on February 17, 2011, 07:17:24 PM
Change R6 to 1K.

Thanks, that makes sense. I'll try out a couple different things.

Also, I have new issues...
I did this mod http://users.telenet.be/orangefg/pulsar_pcb_fix.gif
And I also found that I forgot a resistor...somehow the pedal worked decently..strange...
Anyways...

Now the pedal works great except for one huge problem. The signal is a LOT weaker when the pedal is engaged.
What would be the issue here? I've done a couple quick checks for solder bridges and what not, haven't measured any voltages, it sounds like the pedal is working fine just way lower volume. Which just doesn't work.

Idk if I'm looking at the same schematic here so it's kinda tough. On the tonepad I'd try changing R4 to a smaller value, or maybe R5 if that didn't work.

Quote from: Jazznoise on February 18, 2011, 11:49:28 AM
Idk if I'm looking at the same schematic here so it's kinda tough. On the tonepad I'd try changing R4 to a smaller value, or maybe R5 if that didn't work.

Alright. Any idea how to fix my signal loss problem?

Uhh, that was my suggestion! 

Quote from: Jazznoise on February 18, 2011, 07:11:16 PM
Uhh, that was my suggestion! 

Once again, I'm an ignorant fool.
Thanks for tolerating and thanks for the suggestion. Hopefully it'll help me out. I have a feeling I'm missing some other big thing that's goin on on the pedal..but we'll see.
Thanks again.