Strange problem with XOR gate fuzz

[ethrbunny]

Yah. Getting all the leads to the 4070 was tricky.

[RaceDriver205]

So did you end up making the PCB?

[ethrbunny]

I'd love to figure out how to tame this a bit. The volume differences are so extreme. Maybe I'll move one or two of the pots to trimmers. For my ears they don't all have a great deal of effect.

[John Lyons]

Yes, I made a PCB for the XORUS. I had placed a 1M trimmer on the board to bias the input  but the trimmer was a single turn one and it was very hard to get it to bias just right. The correct bias area is very small. I would use a multiturn trimmer next time.
After all this it still gates a bit. On the breadboard it was pretty close to not gated. I'll touch up my PCB and post it soon.

Etherbunny
90% or more of the settings are consitent volume wise on mine. Some of the almost off settings that are octave and super treble are quiet but that's ok I guess...

John

[John Lyons]

Here is the PCB I made. I added a tone control witch I thing helps keep your ears from bleeding at times.
Search Mark Hammers 'Stupidly Wonderful Tone Control" and see what it says.
I like the tone shaping and it keeps the volume up.
This is the first PCB i've drawn, go easy on me! It works though.

[RaceDriver205]

Awesome! I add this to my list.