Southern Belle + Seabed Delay

falco_femoralis

Well-known member
I put this together for a customer who wanted something like the Mad Professor Bluebird - an overdrive pedal with a delay built in for guitar solo type stuff. I had the Southern Belle already and build the Seabed Delay to accompany it. I managed to get it in a 125b by stacking the boards. The size of the Southern Belle in particular was critical to fitting everything relatively nicely - I didn't have to use any special components for this.

The dual pot is there because I didn't have any normal A1M for some reason, but I did have 3 duals, a solder, and two long leg versions.
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I used solder type pots for the middle knobs and attached them to the boards with 20ga wire I tinned and made into bus wire. Doing it this way would make the boards easier to deal with if the pedal came apart to troubleshoot. To get their length and shape right I installed the two outer pots onto the board, and the solder pot in the pedal, then bent the wires into shape. I went back and forth getting them to the right form to fit the solder lugs

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Here's both boards installed. I used long leg pots for the top board, and a dab of hot glue between them to keep everything secure. They are wired so the input signal goes thru the southern belle, then into the delay. The LED and switching wires are on the southern belle, and I used the delay's 3 ground connections as a hub for both boards and the audio jacks. I wanted to keep the wiring as simple as possible so the power jack only has to interface with one ground wire.

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And here we are! I purchased a powdercoated enclosure from stompboxparts for this. It doesn't really play nice with my paint pen labels, as the finish is too waxy. I tried scrubbing it with some iso alcohol but it didn't do much to help adhesion. On another powdercoated enclosure I sanded the clear coat down to get a more porous surface which would take paint better, but I didn't want to do that with the metallic finish here. It's winter and difficult to make enclosures, but I think I'm going to make a big push to get some together because the quality would be much better with the polyurethane clear coat I normally do.

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I instantly liked the pedal. I totally get why you'd want the two together - it's just super cool being able to go for the guitar solo and not have to worry about dancing between two pedals. I'm not a super big fan of the southern belle sound, as I find it and the lightspeed too "squishy," but having the delay integrated was too cool to ignore. I love it! Now to make another one for myself...
 
Awesome!

I'd still want to put some thin neutral barrier between that one board and the pot-jumpers. Some breadboard jumpers would have the insulation on them already... just thinking aloud for when I attempt something similar (dual flanger build).

Of course, now I have to make one of these, too.
 
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Awesome!

I'd still want to put some thin neutral barrier between that one board and the pot-jumpers. Some breadboard jumpers would have the insulation on them already... just thinking aloud for when I attempt something similar (dual flanger build).

Of course, now I have to make one of these, too.
I was thinking about this too, and I considered heat shrinking or hot glueing them, but they are so stiff and there's about 1/4" clearance between them and the board, and everything else they are attached to is secured in place. The back end of the board is hot glued to the TL072 below it so it's secured at 3 points, making it a sturdy point for the end of the bus wires that aren't attached to the pot
 
That's pretty slick! The PT2399 has an extra CMOS inverter in it...maybe it could be used to make a Red Llama with delay.
That would be pretty cool! In the original Bluebird, there was only one knob for the delay function. I'm not sure what it adjusted, other than the level of delay. Perhaps as the control was turned CW it also increased the number of repeats, or maybe there was a set value for repeats and time that Mad Professor deemed appropriate for guitar solo type stuff. I'm not sure what that may be, so I installed all 3 controls so the end user can decide.

I don't know much about circuit design, but if you made a PCB like that I'd definitely buy it!
 
@falco_femoralis I have a 2399 on hand, so I'll try to breadboard something. @EisengesisFX is suggesting a parked wah kind of filter, or maybe something with an expression pedal. I like the idea of "instant lead tone", but I'm not sure how much we can fit in a 125B. Do you think we could do it with six knobs? Are there any features we could get from one circuit that we couldn't get from a multi build?
 
@falco_femoralis I have a 2399 on hand, so I'll try to breadboard something. @EisengesisFX is suggesting a parked wah kind of filter, or maybe something with an expression pedal. I like the idea of "instant lead tone", but I'm not sure how much we can fit in a 125B. Do you think we could do it with six knobs? Are there any features we could get from one circuit that we couldn't get from a multi build?
An exp out jack would be nice to incorporate with an expression pedal, but I'm not sure if it would fit the theme of one mashing just one pedal to get an instant lead tone.

Maybe there could be a couple toggle switches to attain different "parked wah" freq peaks. Or maybe there could be a rotary switch that would take the place of the tone control.

The Red Llama doesn't have a tone control but the 25th anniversary version does. Tone controls on overdrives are kind of a set it and forget it deal for me. They're almost unnecessary once you figure out where it needs to be for your setup, but maybe an internal trimmer?
 
Yeah. I think, if you made the resonant peak selectable between wide and narrow, you could get a parked wah or more traditional tone control.

Maybe another switch to send the repeats back into the front of the distortion, or just back into the 2399 input.

P.S. I looked up the Bluebird; the external control was for the delay level, with internal controls for delay time, and repeats.
 
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To be clear, my hope was that the expression pedal could be optional and of course would use a switching jack. So a parked wah situation would be easy easy with the filter and a peak selection switch, but an expression pedal would let you get more actively funky with it in a real-time way while playing.

I'll start up a DM thread with both y'all @Aleph Null @falco_femoralis
 
No no no...

Twould be even cooler to have its development made Public Discourse!
Allow us flies on the wall to observe the circuit being conceived...



Red Llama has 2 inverters — wondering if some of that Way Huge flavour can be made with just the one?


Really digging the resonant filter idea! As well as the (optional) expression-pedal tweak.


@falco_femoralis for your earlier iteration, I vote for HOTCAKE! It's got that little something extra beyond the plethora of YATS, but yeah, if you go YATS there are so many flavours to choose from — which is a good thing, unless it spirals into optionitis-paralysis.

I still haven't come up with a good OD for my bass version... bass rarely gets to solo, but I think with the right OD (clanky grit like a TS-50B to cut through the mix?), it would be awesome.




@Aleph Null — might be worth checking out the bits that came before, such as Allesz Grab & GoGo, which also used the spare inverter with a couple of 1N4001 diodes in the loop. MadBean didn't make use of the inverter, but has two Delay-dirt pedals — the SPARKLEHORN (overdrive), and the SPLUNKER (fuzz).


Very interested to see what you folks come up with for a one-stomp solo-op — yeah, keep it public, but I also get why that's maybe not the right path to drive a project through to fruition.

Godspeed.
 
@Feral Feline Keep it public?! Everyone loves a hotdog, but no one wants to know how the sausage gets made. That'd be worse than signing up for the haters ball!

Grab & Go Go: inverting soft clipping
Sparklehorn: TS adjacent with additional hard clipping in the delay feedback loop.
Splunker: fuzz face with delay

I hadn't realized how many times this has been done. I guess it was a good idea, even if it wasn't a very original one!
 
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