Low/High pass filter in one switch on the Muffn Big Muff?

[Anonymous]

Hey all!
I’ve got a (probably really easy and stupid) question regarding the Low and High Pass Filter mods on the Muffn Big Muff.

First of all I’ve uploaded a picture of the wiring of the two mods so you can take a look at what im describing here. https://prnt.sc/13juskh

There are two mods for the Muffn which are a Low pass filter and a High pass filter, both of them are using a DPDT On/On switch with the capacitor on one side and the other being left as is.

Now what im trying to figure out here is how to incorporate the High/Low pass filter in one switch with one side being the high pass, the middle position being both off and the other side being the low pass, or something along those lines.
What kind of switch would I need and how would I need to wire everything up?

As I said, this probably is a really stupid question but im really at a loss here so I’d really appreciate it if someone could give me a little help here!

Thanks in advance.

[Big O]

Off the top of my head, I think you could use an ON-OFF-ON DPDT switch with center off position for standard tone, bypassing both high/low filter caps, and solder the high and low filter caps to either side of the switch.  This would give you high pass filter – standard – low pass filter options.  However, this would not be a stomp switch, but a standard toggle switch.

Maybe the real experts on the board have a better solution.  I am currently on the road traveling and have no access to my archived stompbox building information, so I am just spitballing here.

 

[Anonymous]

I actually meant a toggle switch, my bad!
thats great I’ll have a look into it thank you!

Do you know how I would have to wire it maybe?

[Big O]

Looking at the board, It appears that the situation is more complex than what I originally thought.  There may be a way of using a single switch to accomplish switching the high and low pass filters, but I am not quite sure how to do it right now until I look more at the schematic and try to figure something out.  I didn’t realize that there were two different sites on the board for the filters.  Maybe someone else can give a hand.

[Big O]

Looking at the schematic, I think you can accomplish what you want to do with a DPDT ON-OFF-ON switch wired in a non-traditional way.  Since I am on the road for the next couple of weeks and don’t have access to my graphics programs on my PC, I can’t provide a drawing at this time.  I would run a wire from the first eyelet of MOD1 to a center lug of the switch as the MOD1 input, and then attach the cap to one of the 2 lugs in the same row (same side) of the switch.  From there, I would connect a wire to from the other end of the cap to the second eyelet of MOD1, giving you your first switchable filter.

Then I would run a wire from the first eyelet of MOD2 to the other center lug (opposite side of the switch from the MOD1 side) for your second input into the switch.  Solder the MOD2 cap to one of the outside lugs on the MOD2 side of the switch, diagonal from where the MOD1 cap is attached.  Run a wire from the free end of the cap back to the second eyelet of MOD2 on the board.

This is how I would do it and I think it would work.

[Anonymous]

Wow thank you!

I quickly drew the wiring how you described on a piece of paper, it should be like this, right?

But thank you so much for your time! You really helped me out haha

 

[Anonymous]

[Big O]

Wilkie’s way also will work, of course.  I didn’t have the time to study the schematic in detail during my travels and failed to see the commonality of the MOD 1 & 2 pads/eyelets.  However, the method I came up with and drawn by the OP should work as well.

Wilkie also provides a great diagram.  As they say, a picture is worth a thousand words.

[Anonymous]

Thank you two so much! I’ll say it again, you both helped me out massively here 🙂

[Author]

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