Do I need to tune required if the receiver connection is needed to produce the field?

The tuning light on the transmitter only shows you that the transmitter coil is in resonance with the frequency enough to produce a sufficient magnetic field to light the LED.

It doesn’t do anything else.

If the receiver is connected, and the receiver coil becomes resonant, it will effect how much power the transmitter coil is producing, and can shift where the LED lights up.

Tuning by the transmitter LED is not how it is normally done. It is a fabrication of Spooky2 to allow you to tune the system because you can’t see the LED on the receiver the way the boxes are designed. This has appeared to cause more tuning issues than it solved.

If your receiver is not connected, it will still try to go into resonance, but power will have a hard time flowing back over air or earth ground. To achieve the same without the cable requires far more power than when it is connected by the common ground wire (link cable).

Simply, the link cable makes it easier to establish an energy flow between the boxes to produce the desired field.

You can actually tune the system without the link cable, although the boxes would need to be very close to each other.

The LED on the receiver; however, shows you how much power is flowing. If you tune and have no light on the receiver box, you have nothing. If you tune and have a weak light on the receiver, you might have a very weak scalar field, but could be made much better.

The existence of a light on the receiver LED does not guarantee it is scalar. You can tune an EMF field with sufficient resonance to create sufficient power in the receiver to light the LED.

For more details, please check this link:
https://www.facebook.com/groups/spooky2scalar/posts/1123938264846397/