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AhemI expect there will be another Ictineo/Submarine clone/build, very soon, given that the schematic is floating about in the Inter-ethers now.
Give as good as you get.
Props and respect to those in the DIY community that selflessly share their knowledge.
www.pedalpcb.com
www.pedalpcb.com
Thanks Luke, I've got both those PCBs already.Ahem
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Drebbel Bass Preamp/EQ - PedalPCB.com
Compare to Southampton Pedals Ictineo Preamp/EQwww.pedalpcb.com
Or
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Submersible Preamp - PedalPCB.com
Compare to ElectroniX / Zeibek Submarine Bass Guitar Preampwww.pedalpcb.com
oh - I may have completely misunderstood your post then!Thanks Luke, I've got both those PCBs already.
Plus I've got two original Ictineos as well.

Finally, W&C Phat Phuk. The circuit seemed to be interesting with its J201/Germanium topology.
After populating the vero, I remembered that I had some "why not both" transistor PCB laying around, so I made the GE switchable (GT309B / SFT317).
I tried a few GE transistors, some sounded similar, some had a clearly different flavor, and it was interesting to hear that hFe didn't really matter, at least in terms of volume on tap. This pedal can go loud!
Also very cool is the Gain (or bias?) knob outside, it goes from clean boost, to that famous edge of breakup, to dirty boost, to fuzzy.
Great pedal that sounds bloody fantastic on bass .... and guitar. Actually my guitar player said after 2-3 minutes with it "I absolutely need this!". He's currently using an Echoplex preamp/boost that sounded pretty meh next to this one. I guess I'll have to make another one for me - with 4 GE transitors on a rotary![]()
One was around 70, the other around 35.Looks great! What hfe did you use for the Ge transistors?
After reading this, I realized I'd never tried my '69 with my bass rig.... went home last night & enjoyed it. Big thanks to @johnk_10 for helping me realize to keep trying what we already have.i love my original fulltone '69 on bass so much (the one with NOS NKT275 transistors that go for very high prices these days!- $600-$1K!) that i built an exact clone of the circuit back in 2018 in a smaller enclosure with a voltage inverter so i could use a standard -9V power supply.
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How do you find it sound wise? I was recommended it and going to have a go at laying out a 1590b top jacks PCB for one of themI finished up my Crowther Prunes & Custard on strip board project.
Bone Arrow is how my son used to say bow and arrow, lol.
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View attachment 7035352