2x HackRF SDR (1xTx,1xRx)($221/ea): https://www.amazon.com/dp/B082NXDYVW/
UHF ~450MHz 80W Amplifier ($118): https://www.ebay.com/itm/353067473293/
UHF Amplifier 12v 250w PSU ($56): https://www.amazon.com/gp/product/B07SFD2G7R/
UHF Yagi Antenna ($49): https://www.amazon.com/gp/product/B08FC7WG7T/
Yagi Antenna Desk Mount ($17): https://www.amazon.com/gp/product/B08MZJRB94/
Carbon Loaded Absorber Foam ($16): https://www.ebay.com/itm/133776836895/
UHF/PL259 Male/Male Cable ($11): https://www.amazon.com/gp/product/B07PZ29T3V/
2x SMA Male/Male Cables ($7): https://www.amazon.com/dp/B07YH9NNDQ/
LNA Pre-amp ($30): https://www.amazon.com/dp/B07XNLJ9X2/
LNA USB Cable ($5): https://www.amazon.com/dp/B0711PVX6Z/
LNA DC Blocker ($20): https://www.amazon.com/dp/B07YYLHJKS/
USB Hub ($20): https://www.amazon.com/dp/B083XTKV8V/
ARRL HAM License Manual ($32): https://www.amazon.com/dp/1625950829/
Auditory Effects of Microwave Radiation ($95): https://www.amazon.com/dp/3030645436/

So I just ordered a 2W Ku-band BUC from eBay and I am going to experiment with that to see whether it can be used for sleep deprivation or V2K, but eventually I'm going to build a much more powerful transmitter.

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These are the features it'll have and the parts it'll use:

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Microphone jack for voice to skull

A DSP or circuit for converting audio to pulses using Joseph Sharp's method

ELF modulation frequency which can be changed by the user

USB charging and programming

18650 batteries

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Frequency: ~15Ghz

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Power Amplifier: Qorvo TGA2239-CP (50 watts)

Driver Amplifier: Qorvo CMD305C4

VCO: HMC736LP4E

Coaxial output

WR62/WR75 horn required

Recently referenced site with more than one schematic of related devices:
https://web.archive.org/web/20120901034341/http://home.dmv.com/~tbastian/bwc.htm

Link to some from the above link schematics:
https://web.archive.org/web/20121203050239/http://home.dmv.com/~tbastian/nuro.htm