Warhead, first of all, aviation radar sets are prohibitively expensive. Second, radar sets are designed to work within a certain range of freq and wattage, you can't do too much "tweaking" to those systems without significant reworking of many subsystems.

The hardest part of building a home radar ...

Technician1002

You are right about the interference issue. As I stated in my reply, as long as you are not interfering with others use of the public frequencies, you are within your rights to do pretty much anything.

I would check your source on TV, Sound Systems, Phones etc, most of these devices ...

I missed this earlier...
Radar does not interfere with pacemakers. Pacemakers are timed circuits to keep your heart beating within a certain range (yes this is frequency but it is not radio frequency). Other than the pacemaker potentially altering the transmitted freq of your attempt at radar and ...

I was a Radar Repairer in the U.S. Army for 18.5 years and have some observations based on comments here.

Transmitters do not have single frequencies, they are able to utilize a single freq at a time. The tuner determines the output freq for the transmitter/antenna.

Current radar sets prevent ...