Downeast Microwave Transverters and equipment
Directive Systems Antennas
C3i More antennas
DL2AM Components and Amplifiers
LNA Technology Low noise cavity input preamps and sequencers
Advanced Receiver Research Gunnplexer systems
SSB Electronics Transverters and equipment
GH Engineering Neat solid state 1296 amps
Kuhne Electronics DB6NT microwave gear
Parabolic AB Dish antennas
SCTV-SkyCable MMDS downconverters and antennas
SHF Electronics Gunnplexers and dishes
M2 Antennas Great UHF beams
Lunar Link High power UHF amps by K1FO
California Eastern Labs GaAs/HEMT devices by NEC
Fujitsu Semiconductor Nice IMFETs for microwave amplifiers
Toshiba Semiconductors RF devices and MMICs
Mini-Circuits MMIC amplifiers, mixers, passive devices
RF Parts Co. Power modules and active devices
Agilent Technologies Test equipment, semiconductors
Part Miner Data sheets for any semiconductor that ever existed
Miteq Amplifiers, mixers, sub-assemblies
MA-Com attenuators, connectors, active components
W7RF RadioDan Henry amplifiers (they still have the 220 and 430 MHz units)
Ebay Believe it or not, there is a boatload of microwave gear for sale here!
Rohn Industries Towers and support structures
Danas Index of Electronic Manufacturers if you cant find it here it doesnt exist!
ZAX Millimeter Wave Corp. Millimeter wave parts, horns, feeds, etc.
RF Cafι Good vendors links for RF products
US Digital Optical encoders and motion control (steer that big dish!)
Dont forget your local hamfests!