Esquire wiring - arlo and 4-way

[old_picker]

Wired everything up with the standard arlo mod cap and resistor thus see below diagram:
1. = Switch position furthest from the headstock.
1. Pickup direct to output jack [no circuit loading on the output = rowdy]
2. Volume engaged [preset the volume]
3. Volume and tone engaged [preset a darker tone]
4. Arlo midrange mod with vol + tone [accentuates midrange]

What I am noticing is a distinct thump as I switch between pos 3 and pos 4 and vice versa.
Any one have any idea why this might be happening?

thanks for any and all tips

 

[pipthepilot]

Wired everything up with the standard arlo mod cap and resistor thus see below diagram:
1. = Switch position furthest from the headstock.
1. Pickup direct to output jack [no circuit loading on the output = rowdy]
2. Volume engaged [preset the volume]
3. Volume and tone engaged [preset a darker tone]
4. Arlo midrange mod with vol + tone [accentuates midrange]

View attachment 1080677 What I am noticing is a distinct thump as I switch between pos 3 and pos 4 and vice versa.
Any one have any idea why this might be happening?

thanks for any and all tips

I think what is happening is that because the .01uF cap has no way of discharging to ground when it is switched out of the circuit, it releases its stored charge when the switch is engaged, similar to how an effects pedal can pop when there is do no draw down resister to ground when the circuit it engaged.

 

[pipthepilot]

Hello again,

I was thinking about this issue this evening and the more I thought about it, the more I'm sure that the thump you are hearing is what I explained about how the 0.01uF cap has now path to discharge to ground when its switched out of the circuit.

I then started thinking about how to fix it and ended up creating the diagram below.



This circuit works exactly the same, with the same switch positions.

P1: Full volume, No tone
P2: Volume, No tone
P3: Volume, Tone
P4: Volume, Arla Mod

The difference is that now the .01uF capacitor can bleed to ground via the .005uF cap which will stop the thump noise. Also, this won't affect the tone because it's just changing where the volume pot is in the circuit. On your diagram, the hot signal from the PU went to volume first and then to the mod whereas my diagram, the hot signal goes to the mod first and then the volume. If anything, this should improve the tone.

Hope this helps, and let me know if you have any questions.

 

[old_picker]

Thank you so much for the effort - I'm going to rewire that switch today, see how it goes and report back

 

[pipthepilot]

Thank you so much for the effort - I'm going to rewire that switch today, see how it goes and report back

No effort at all, working out circuit diagrams is much more fun than doing a crossword puzzle.

I'm really curious to find out if my solution fixes your issue, so please let me know how it goes.

 

[pipthepilot]

Thank you so much for the effort - I'm going to rewire that switch today, see how it goes and report back

How did it go, did the change fix the thump?