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The switch with capacitors is the Fc voicing switch for the wet path. Fc values were chosen to suit the different effects but always leaves the dry analog tube path unaffected 😋

The inductor for the CLC fit nicely where the reverse polarity diode should go. This diode is wired directly to the DC jack with heavier gauge leads to which the first bulk 220uF cap sits.

The switch with only resistors is a voltage divider to make an attenuation switch for the output

Getting the BTR board ready 😎 You may notice I’ve added a CLC choke at the DC input

I found the file on the www.Looperman.com site. I have the file named: MarloweDK-2022-12-23-funky-bass-guitar-1-100-bpm Thanks to MarloweDK!!

I should be able to find it. In any case I can PM you with it?

I did change the pot footprints at the last minute so you’re probably right.

Nice work sir! I’ll have a look. I’ve since updated KiCad and now none of my traces are tracking properly as well. When I get a chance I’ll have another look. 😎

Yeah, I’m planning on using some enamelled wire for that. Front view, top pot, trace running through middle pin. Back view, top pot, trace running through square pin rather than going around it. Easy fixes but I was trying hard to avoid that.

But... I found two errors on my board... I'm not even sure how it happened. Check out the trace running through the Tone leg mount next to R9 and that pot's centre pin. Sigh. I'll have to work out why KiCad let me do that.

Guess what arrived in the mail today... Still waiting on the PCB... might be lost in mail, so new ones ordered Other electronic parts are in. Hoping my enclosure draft 01 works: drilled and waiting for powder coat at Tayda. and... A little excited!

Hi, Glad it worked for you! I use shielded simply for caution sake :)

I’m surprised this happens as the second tube acts as a buffer for the 1/4” out. So the two outputs should be isolated. Interesting! I’m looking forward to the replies you get for this one.

A little something I've ordered. Fingers crossed! The three pots and the switch give a strong fix to the enclosure. [Back] I've added further filtering caps for the 9V supply [Front bottom left]. I've used one op-amp as a buffer for the input, another op-amp to buffer the 4.5V rail, and the...

Here is a sample of my updated MOD for the Bathtup Reverb. Note that the Dry path stays clean: [This is my original case, not my updated graphic]

The Fc of 180Hz has been my favourite for Bass. It's a very low slope but still removes the mud.

So, in terms of simply bending the pin, that would work well. However, I needed to cut Pin 3 because I had already installed the module for my previous design. I checked how the capacitance of C2 would impact the Fc values. Because the Fc of C2 is so low compared the the voicing switch Fc's. It...

Good question, I’ll check my notes. My current build has a 1uF in place.

So, after a pause to re-do my Bathtub Reverb MOD, I've now integrated the idea above [thanks Mick]. I have adjusted the circuit so the HPF only impacts the Wet signal path while preserving the Dry path. I've also taken the Mix option away so it can be 0-100% Wet independantly of 0-100% Dry...

Note that I shorten pin 3, then mount pin 3 to the board via the 0.015uF cap. All of my shileded cables are grounded to pin 4. Next time I'll leave pin 4 un-trimmed to make this easier on the underside of the board.