https://drill.taydakits.com/box-designs/new?public_key=K2dnTnVxTEdOU1RzaGdMK3FGNTRjZz09Cg==
Make sure to adjust hole #8 to whatever you need for the power jack…
I used a pair of on/on SPDT toggles. Socket the “in” of the diode at the pcb, then you attack the diode to one pole of the toggle, with the other end going to ground somewhere. Center pole goes to the “in” of the diode on the pcb…
I built mine with each diode set in a toggle. I can have all diodes, diodes on Ge, diodes on Si, or no diodes. Also, Shellac just announced their new album today, “To All Trains,” out 5/17…
Seems higher gain NPN is most common. I bought about a hundred 2n5088’s a while ago, and they all measure at the higher end of the scale. Same with BC109C…