Self tuning??? That must translate to broadband, unfiltered, and capable of jamming anything they didn't anticipate being in use back then...
Keep in mind that jammers, being illegal, have no quality control, and if it interferes with medical equipment or businesses big enough to lobby congressmen, a murder charge or a six figure fine could be in your future.
That said, this is what you do.... find a noise source for that band (commonly available for testing applications) and a suitable amplifier. Everything needed to build a jammer is available as modules that can be easily bought and connected via SMA adapters.
One time (long ago in the 802.11g days) I made a square wave oscillator using a schmidt trigger (at around 40MHz i think) and I had placed a little DC motor with an aluminum fan blade on it next to the circuit so the parasitics caused by the fan blade moving by the circuit modulated the oscillator. Although my intent was to just watch it on the scope hoping to see a sweeping frequency, it killed my wifi instantly. I can't remember what schmidt trigger I used, but it was either fast enough to have GHz harmonic content or something on the board was acting as a resonant circuit, not sure. It was sure interesting at the time though!
But charging over $3k for a "jammer gun", now that's just laughable. Not a chance in hell... Especially when it has a ridiculous Bushnell scope on it as if the multi-band (probably log periodic) beam antenna inside the gun actually had less than a 30° beam angle... Nope, not buying it, even if I had a legit need and the money to waste lol. Not to mention that 80w from a handheld device like that will kill even the best drone-style HVLi battery in a few minutes...
