What are the measurements of the scalar wave and how can I tell where the outside of the wave is?

The shape of the scalar field is more like a zeppelin/football than a balloon.

It stretches between the two boxes, starting narrow at the box and achieves its widest point in the center.
The width of the field is half the distance between the boxes.

So if you have your boxes 50 feet apart, the field’s maximum width will be about 25 feet at the center point.

This is the active scalar field and is where the two RF transmissions radiating from each box are colliding, canceling out, and leaving behind a scalar field.

There are theories that a secondary toroidal field exists around this active field, which can stretch out much further.

As for the range, you can set the boxes apart, there theoretically is none. Tesla measured the circumference of the earth using scalar waves and could detect storms some 200 miles away.
Unlike EMF, where power follows the inverse square law (reducing in power four fold every time you double the distance), scalar does not have this issue. Being a standing wave, it doesn’t have to travel per se.

In fact, experiments by Meyl Konstantin have shown that you can end up with more power at the receiver than what you started with on the transmitter.

I myself have experienced a four fold increase in power at the receiver.
I don’t know how far these particular boxes can be set and still be tuned with the frequency range they have at their disposal, but it was no issue to tune them 70 feet apart here in my house. You just need a sufficiently long enough link cable to wire the return path between the two boxes.

They can be tuned without a link cable, but given that the energy has to flow across the air which has a higher resistance value, you need more power to achieve this effect at distance. I posted a picture of two boxes without a link cable tuned some 2 years ago in here. The link cable just makes it far easier to use at distance given the amount of power the transmitter is working with.

As for testing the boundaries of the active field. The field is created with active RF transmissions. This RF has the frequency used to tune the boxes.

Anything resonates in the field becomes a receiver and a transmitter. Therefore, you will emit RF when in the field.

If you have an RF detector, you can hold it in one hand while being out of the field. When you stick your other hand into the field, you will conduct RF and the meter should register an increase in RF activity. Now you can probe the field boundaries with your hand.

For more details, please check this link:
https://www.facebook.com/groups/spooky2scalar/permalink/882552732318286/