JJ: Zwei Singlecoils
Circuit JJ1
A circuit with three controls, two of them volume and one tone, without a switch is widely used. Only a single volume regulator is smarter for practical stage operation. A hole will be free during the conversion; So two tone controls can be connected, one for each pickup. A Megaswitch T enables individual and parallel switching.
1. Bridge
2. both in parallel
3. Neck
Switching functions
Electrical switching principle
Bass with Megaswitch T, three potentiometers
Wiring diagram with Megaswitch T
Bass with Megaswitch T rotary switch, three potentiometers
Connection of the rotary switch before installation
Wiring after installing the rotary switch
Connections:
position
1 bridge
2 both in parallel
3 neck
connections
1, 2 hot connector neck and tone control neck grinder
3 ̶
4, 8 volume regulator right connection
5, 7 hot connector bridge and tone control bridge wiper
6 ̶
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Circuit JJ2
This is a simplified version of circuit JJ1, intended for basses with only two controls (1x volume, 1x tone).
1. Bridge
2. both in parallel
3. Neck
Switching functions
Electrical switching principle
Bass with Megaswitch T, two potentiometers
Wiring diagram with Megaswitch T
Bass with Megaswitch T rotary switch, two potentiometers
Connection of the rotary switch before installation
Wiring after installing the rotary switch
Connections:
position
1 bridge
2 both in parallel
3 neck
connections
1, 2 hot connector neck
3 ̶
4, 8 volume regulator right connection and tone regulator grinder
5, 7 hot connection bar
6 ̶
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Circuit JJ3
With this circuit, both pickups are connected in series when the switch (Megaswitch T) is in the middle position. This results in stronger bass and mids as well as fewer highs. Only one tone control makes sense here.
1. Bridge
2. both in serial
3. Neck
Switching functions
Electrical switching principle
Bass with Megaswitch T, two potentiometers
Wiring diagram with Megaswitch T
Bass with Megaswitch T rotary switch, two potentiometers
Connection of the rotary switch before installation
Wiring after installing the rotary switch
Connections:
position
1 bridge
2 both in series
3 neck
connections
1 -
2 mass
3 hot connection neck, volume control right connection and tone control slider
4 hot connector bridge and cold connector neck
5, 6, 7, 8 ̶
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