Only one range ring no matter the max range. Range ring has no number indicating ring (I forgot if I mentioned that)

It seems that the empty scan line is excessively strong, along with the range rings. The gain does affect the range rings. I wonder
if this is how things are normal of a period radar. I thought that the gain would be only for targets and noise and land. Not the scan beam
itself and the range rings. Also the cursor seems to be the same color as the p7 fading. It should be more white, like an incandescent light.

At 1/2 on the gain control, the sweeping beams leave a solid yellow for about 1/3 of a sweep. It is solid, not varying due to noise.