Fuzzy Fox Change Toggle to Footswitch

[Fuzzbuzz78]

I apologize for the duplicate post… but I posed a question on the thread below, and I’m really curious if somebody could help me out here in Modifications?

Fuzzy Foxx switch and diodes questions

Howdy gang, Got a couple questions about the Fuzzy Foxx. 1. My reading of the schematic says that D1and D4 produce the octave, and D2 and D3 are the clippers. Is that accurate? 2. How closely matched to the octave diodes need to be to each other, and is there a range they should be in? 3. The...

forum.pedalpcb.com

I decided I wanted the octave for the fuzzy fox to be on a footswitch instead of the toggle. 3 wires from toggle pin out location on the pcb are running to a DPDT lugs 1,2,3. LED Negative is connected to lug 4. And I have 5 as ground running to ground on my bypass footswitch. When I engage the octave fuzz, the signal cuts out for a split second. Is there anything I could do so the signal from the fuzz does not cut out when octave is engaged?

Cheers!

 

[Feral Feline]

You've got a CLR on the positive leg of the LED, yes?
That's nothing to do with the signal cutting out, just want to make sure you're not blowing up LEDs.

Looking at the schematic, I can't think of any reason the sound would cut out completely even for a split-second.
Looking at the board for sale in the shop, there's a clip-switch as well, but it isn't on my schematic;
Please post the associated schematic, if you have one.


If you do have the correct schem then with your DMM set to BEEP-mode, check all the signal paths around both switches, and, because it could happen — check to make sure you've got the octave-switch and not the clip-switch being offboard wired.

Maybe post some pics, too. While this is a mod, it feels more like a trouble-shoot thread.

 

[Fuzzbuzz78]

You've got a CLR on the positive leg of the LED, yes?
That's nothing to do with the signal cutting out, just want to make sure you're not blowing up LEDs.

Looking at the schematic, I can't think of any reason the sound would cut out completely even for a split-second.
Looking at the board for sale in the shop, there's a clip-switch as well, but it isn't on my schematic;
Please post the associated schematic, if you have one.


If you do have the correct schem then with your DMM set to BEEP-mode, check all the signal paths around both switches, and, because it could happen — check to make sure you've got the octave-switch and not the clip-switch being offboard wired.

Maybe post some pics, too. While this is a mod, it feels more like a trouble-shoot thread.

Thank you. I used the older board available earlier in the year. No clipping switch option.

Yes, I have a resistor on the positive leg of the LED. This is the board I’m using

The schematic is pretty much the same as the original Foxx Tone Machine. Here’s a link to the schematic.

Fuzzy Fox Schematic

 

[Feral Feline]

Thanks! I had the schematic, but not the full build doc.

Alas, that sheds no further light (for me) on why the sound would cut out momentarily.

There's a constant connection via the collector>C4>D1...​

Something to do with the cap(s) C3 (or C4) discharging/recharging?


I'm just a long-term newb, so I'll have to defer to those with greater knowledge and experience.

 

[Feral Feline]

Now I can see why the tone changes so drastically when the octave is engaged/disengaged...

C3 & R9 and to an extent R5

 

[Ginsly]

I wonder if the third Octave Switch mode was added to the new version? It's a modified "No Octave" setting. Guess we'll find out in the build doc!

 

[Fuzzbuzz78]

Is it possible that the placement of the switch in relation to D4 would cause a delay when switching? I am really stumped on this. Would switching C3 and C4 to a lower value film capacitor do the trick? like a 1uf?

 

[Nostradoomus]

I haven't built one of these in awhile, but remember it having the same deal. Not an issue though, and not worth troubleshooting down a rabbit hole because I never switch that in a setting where it actually matters. I'd suspect it has something to do with the big electro caps surrounding the switch network, but it's really a pretty minor issue I can overlook based on utility.