Apologies for reviving an old thread...
Could you confirm for me that the top circuit does the following:
- Cable connection is always mono
- Switch in push position enables direct connection to magnetic pickups and disconnects battery to preamp
- Switch in pull position disconnects magentic pickups and enables piezo only (if grounding "MAG" pin)
- When cable is unplugged, connection to the preamp is disconnected
- The output jack is the one supplied in the kit