Quote:
Originally Posted by WM6
Hi J_P ,
what are PCB's dimensions? I saw only one (90mm) given on drawing.
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Hi WM6,
90mm is the size of the opening at the bottom of the omega coil, not the size of the PCB-1.
The PCBs can be any dimension you want to make them as long as they fit in the locations where you put them.
PCB-1 must be small enough to fit inside the omega area.
The original factory version has this PCB inside the coil enclosure so the leads will be short and close to the coils.
But for the PD adaptation, PCB-1 could also be put inside the box at the same location that we see for the diagram.
Then the leads will be about the same length, with no loss in performance.
Also, both PCBs may be combined as on a single board in the PD adaptation.
In this case, the VLF tuner section should be kept to the right side of the board, close to the coils and away from the audio amp.
See below for alternate 1 PCB design:
Best wishes,
J_P