On-line retail store services featuring: radio-frequency transistors; mixers; switches; amplifiers; oscillators; radio-frequency diodes; radio-frequency modules; resonators; attenuators; bias drivers; radio-frequency detectors; digital signal processors; linear integrated circuits; microcontrollers; sensors, namely, accelerometer and pressure sensors; antennas; baluns; capacitors; coils; radio-frequency circulators/isolators; radio-frequency filters; inductors; radio-frequency couplers; fuses; voltage suppressors; EMI shielding; relays; adapters; cable assemblies; connectors; direct current blocks; equalizer; EMP/Lightning protectors; interconnect headers; radio-frequency coaxial cable; terminal blocks; terminals; terminations; resistors; current transducers; electronic power quality products, namely, power conversion assemblies, power diodes and power integrated circuits; heat sinks; transistors; rectifiers; thyristors; electron tubes; magnetrons; microwave generators; thyratrons; high power waveguide; ferrite rods; impeders; impeder casings and ignitrons