Spirit Box switch pop

[fig]

Not totally sure the best way of testing this, but if I use a probe on the IN (wire to board input) labeled spot on the 3PDT wiring board soldered to my switch, there is no noticeable pop when engaging and disengaging the pedal). If I put the probe on pin 15 of the PT2399 I hear the pop when I engage and disengage the footswitch. If I put it on the OUT (wire to output Jack) I do hear it pop when I engage and disengage.

You've probably tried another PT2399.

 

[Danbieranowski]

You've probably tried another PT2399.

Yeah, and this has been the case with every spirit box I’ve made. It’s not noticeable really on low gain stuff but on high gain it’s a bit of an annoyance.

 

[Danbieranowski]

Unless it's the switch itself causing the noise, using relay bypass might not help, and in some cases could even make it worse.

A relay module that mutes the signal when switching could help but I've heard just as many complaints about the momentary dropout in signal as the switch pop it's trying to correct. It just depends on which one bugs you more. Some are probably better than others, and it likely depends on the circuit you're pairing it with.

A buffered bypass of some sort (Boss / vintage Ibanez style) would probably quieten it right down. (ducks for cover)

Where would the buffer go in this case? In between the “IN” pad on the 3PDT wiring board and the actual PCB In so it’s before the circuit (like a Tube Screamer)?

 

[Danbieranowski]

If I were to add a buffer to this circuit, where would I want to place it? Unfortunately, I can’t find anything in a search for where buffers should go.

 

[Feral Feline]

If the input jack is poppin, buffer between bypass > main-circ; if the pop is happening down stream then sammich Buffy the Vampopper-slayer between the circ's out and the bypass.

At least, that's how I'd attempt it.

 

[finebyfine]

If I were to add a buffer to this circuit, where would I want to place it? Unfortunately, I can’t find anything in a search for where buffers should go.

I personally would build a Simple JFET Buffer, and like @Feral Feline said, try it at the input of the circuit (Footswitch "IN" Pad -> Buffer "IN" Pad, Buffer "OUT" Pad -> PCB "IN" Pad) and at the output (PCB "Out" to Buffer "IN", Buffer "Out" to Footswitch "OUT" Pad), pray that it's better at the input, and if so just use a C-Buffer to keep the build tidier

Edit: fuck it, I'm trying to kill the pop on mine, I'll try it out myself

Edit 2: Jfet buffer in either place just makes the pop louder. I'll try a relay in it eventually but I won't have the parts for it for a month

 

[music6000]

Try 10K on R7 - 100K

 

[Danbieranowski]

I personally would build a Simple JFET Buffer, and like @Feral Feline said, try it at the input of the circuit (Footswitch "IN" Pad -> Buffer "IN" Pad, Buffer "OUT" Pad -> PCB "IN" Pad) and at the output (PCB "Out" to Buffer "IN", Buffer "Out" to Footswitch "OUT" Pad), pray that it's better at the input, and if so just use a C-Buffer to keep the build tidier

Edit: fuck it, I'm trying to kill the pop on mine, I'll try it out myself

Edit 2: Jfet buffer in either place just makes the pop louder. I'll try a relay in it eventually but I won't have the parts for it for a month

Thank you for trying as well!

 

[Danbieranowski]

Try 10K on R7 - 100K

That’s what I put in there from a prior recommendation. :-/

 

[Danbieranowski]

I personally would build a Simple JFET Buffer, and like @Feral Feline said, try it at the input of the circuit (Footswitch "IN" Pad -> Buffer "IN" Pad, Buffer "OUT" Pad -> PCB "IN" Pad) and at the output (PCB "Out" to Buffer "IN", Buffer "Out" to Footswitch "OUT" Pad), pray that it's better at the input, and if so just use a C-Buffer to keep the build tidier

Edit: fuck it, I'm trying to kill the pop on mine, I'll try it out myself

Edit 2: Jfet buffer in either place just makes the pop louder. I'll try a relay in it eventually but I won't have the parts for it for a month

I ordered 2 full relay kits from Mas-Effects that say they will be here in about a week. They include an optocoupler muting option, so I’ll let you know how that goes.

 

[zgrav]

I have had success using a soft-switch relay bypass to avoid a switch pop that seemed to be microphonic.

 

[Feral Feline]

I came across an interesting circuit recently, might work here though it's intended for real-deal spring reverb...

Ground switch with delay kit - moodysounds

This circuit is designed to work with the BJF Analog Reverb kit. It will make the Reverb effect come on gradually when the stomp switch is pressed. This will

moodysounds.com

Good ol' Björn!


Spirit Box seems aptly named as there's a ghost in the machine... I've yet to build mine and don't like the spectre of popping haunting me til I finally do so.

 

[finebyfine]

I came across an interesting circuit recently, might work here though it's intended for real-deal spring reverb...

Ground switch with delay kit - moodysounds

This circuit is designed to work with the BJF Analog Reverb kit. It will make the Reverb effect come on gradually when the stomp switch is pressed. This will

moodysounds.com

Good ol' Björn!


Spirit Box seems aptly named as there's a ghost in the machine... I've yet to build mine and don't like the spectre of popping haunting me til I finally do so.

You could do this w/ something like a 555 one shot and calculate a good resistance and capacitance to dial the time in, although j175s are easy to find. I can't read the handwriting on the schem but I imagine it's the same idea

 

[Danbieranowski]

I have had success using a soft-switch relay bypass to avoid a switch pop that seemed to be microphonic.

I ended up doing this with a Mas Effects relay kit and it definitely helped the issue. Not perfect, but better!

 

[Danbieranowski]

I personally would build a Simple JFET Buffer, and like @Feral Feline said, try it at the input of the circuit (Footswitch "IN" Pad -> Buffer "IN" Pad, Buffer "OUT" Pad -> PCB "IN" Pad) and at the output (PCB "Out" to Buffer "IN", Buffer "Out" to Footswitch "OUT" Pad), pray that it's better at the input, and if so just use a C-Buffer to keep the build tidier

Edit: fuck it, I'm trying to kill the pop on mine, I'll try it out myself

Edit 2: Jfet buffer in either place just makes the pop louder. I'll try a relay in it eventually but I won't have the parts for it for a month

Ended up using a Mas Effects Relay Kit and that helped. Give that a shot.

 

[ADAOCE]

I came across an interesting circuit recently, might work here though it's intended for real-deal spring reverb...

Ground switch with delay kit - moodysounds

This circuit is designed to work with the BJF Analog Reverb kit. It will make the Reverb effect come on gradually when the stomp switch is pressed. This will

moodysounds.com

Good ol' Björn!


Spirit Box seems aptly named as there's a ghost in the machine... I've yet to build mine and don't like the spectre of popping haunting me til I finally do so.

I haven’t replicated this issue (not denying it) you should definitely not avoid this pedal just due to this and try the relay that Dan ended up using. This pedal is kind of a one trick shot but it’s a good one

 

[Danbieranowski]

I haven’t replicated this issue (not denying it) you should definitely not avoid this pedal just due to this and try the relay that Dan ended up using. This pedal is kind of a one trick shot but it’s a good one

Here's the link to that relay: https://shop.mas-effects.com/products/relay-bypass

For $15.50 you get everything needed for it, plus it's pre-programmed, so you just have to put it together and wire it up.