Sir tedstruk . . . . .
The use of a 1/4 in std mono jack on the OUTPUT is correct.
As for the 1/4 std stereo jack being used on the INPUT, there are two functions specifically being accomplished by that different type of jacks utilization . . . . .even though you are inserting a MONO phone plug into it..
The extreme tip connection is inputting the audio input in a normal function.
The second sleeve / stem contact is functioning as a power switch for the WAH box.
The bushing, that the jack is mounted with, is connected to ground.
The battery that runs the unit has its + connection wired to the PCB.
The battery negative is connected to what normally would be our stereo connection of the jack.
When you plug in a standard 1/4 in phone plug its rear stem is going to be making contact to the bushing.
As the plug is inserted deeper . . . the stem then starts to continually contact the first connector, while the separate tip connector stops and is finally resting into the tip connector of the jack.
This leaves a short between the first jack contact and the bushing shell which is grounded .
Thereby that action doubly acts as your units power switch, as long as the input plug is left fully inserted.
(Your unit ALSO has provision of a plug in wall wart DC supply via a mini phone plug . . .but that will be
forthcoming on your schematic . . . . . in progress )
More minor . . .but exacting . . . . . INFO now needed . . . . mainly mechanical.
Confirm:
Do I have to turn the rotary switch to its extreme CW or CCW position for the switch to engage the .047
capacitor ?
After having done that, if I then switch to the other extreme from that reference,will I then find myself on an unused / dead 5th switch detent position ? .
73's de Edd