Harmonic Percolator turret board layout with added diode toggle?

F

fuzz

Active member
I have been using an existing layout that I modified a bit. I use the existing layout but use a 2 x 10 turret so that the components essentially are symmetrical (straight across) and dont need to be angled. I then just connect the turrets that need connecting on the underside with wire.

I would like to add a 3-way diode switch for germanium, none and silicon diodes. My brain seems broken, and I cannot figure out the easiest method to do this using the existing (or going to a 2 x 12) turret layout. Any ideas? harmonic-percolator-stock-layout.png
 
If you want to stick with the turret board (I understand it's for aesthetic reasons, which is of course completely fine), I can't help with that, maybe someone else can chime in.

Personally, if I had to do something like that, I would just wire the diodes offboard. Using an SPDT for clipping options is pretty simple - even if you keep the 4k7 resistor there (I'd just duplicate it for both clipping options - unless you want to make the silicon option symmetrical instead? I think it might increase the lower octave, as per another thread on the HP). For example, pick the point where the 4k7 and 100nF meet and wire that point into the middle of the SPDT, then on one side put both germaniums (one with 4k7 in line), and the silicons (with or without 4k7) on the other end. Both go to ground. On/off/on switch for no clipping in middle option.

If you have spare turrets, you could maybe wire the silicons into one turret and germaniums into another, and then use the switch to feed one of those (or neither) into ground instead. But the 4k7 makes that trickier unless you're fine with putting two components between the turrets (both diode and resistor) - you would need even more spare turrets to make it "clean".
 
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