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Dr. Gregory L. Charvat
  • About
  • Radar
    • X-Band UWB FMCW Radar
    • Range-Gated S-Band UWB FMCW
    • Range-Gated X-Band FMCW
    • MIT Coffee Can Radar
    • X-Band USB Impulse Radar
    • L-Band UWB Short-Pulse Radar
    • Police Doppler Radar
    • X-Band DC Coupled CW Doppler Radar
    • Unique Approach to FMCW
    • Harmonic Radar
    • WXR-150 sidecar
  • Imaging
    • Synthetic Aperture Radar (SAR)
      • X-band UWB FMCW Rail SAR
      • Range-Gated S-Band Rail SAR
      • Range-Gated X-Band Rail Sar
      • X-Band UWB Impulse Rail Sar
      • Low-Power Radar Imaging System
    • SAR Data
    • Phased Array Radar
      • Through-Wall Radar
      • S-Band MIMO Array
      • IAP MIMO Phased Array
    • Time of Flight Microwave Camera
    • Medical Imaging - MRI
    • Medical Imaging - CMUT Ultrasound
  • Book - Small & Short-Range Radar Systems
  • Courses
  • Radio & Radio Science
    • Radio Science
      • 1.42 GHz Radio Telescope
      • HF Radar
      • Curing Thermoset Polymers
      • Lossy Dielectric Model
    • Amateur Radio
      • 20M SSB transceiver
      • 10&6M SSB transceiver
      • power distribution panel
      • Transceiving with the R390A
      • Portable amateur radio station
      • Mil Surplus & Vinitage Amateur Radio
        • S-76
  • Vacuum Tubes
    • Vacuum Tube Audio
      • Frankenstein
      • Quad-40
      • Mono-Block
      • Battery Powered Tube Pre-Amp
    • Antique Radio
      • Radiola18
      • Colin B. Kennedy 20B
      • Silvertone 4686
      • Olympic 606
      • Zenith K725
      • Emerson Model 888 Transistor
  • Vintage Test Equipment
  • Horology
    • Digital
    • Clocks
    • Watchhes
  • Vintage Computational Devices
    • NCR Class 1500 Cash Register
  • As-Seen on TV
  • Origin Story
Dr. Gregory L. Charvat
  • About
  • Radar
    • X-Band UWB FMCW Radar
    • Range-Gated S-Band UWB FMCW
    • Range-Gated X-Band FMCW
    • MIT Coffee Can Radar
    • X-Band USB Impulse Radar
    • L-Band UWB Short-Pulse Radar
    • Police Doppler Radar
    • X-Band DC Coupled CW Doppler Radar
    • Unique Approach to FMCW
    • Harmonic Radar
    • WXR-150 sidecar
  • Imaging
    • Synthetic Aperture Radar (SAR)
      • X-band UWB FMCW Rail SAR
      • Range-Gated S-Band Rail SAR
      • Range-Gated X-Band Rail Sar
      • X-Band UWB Impulse Rail Sar
      • Low-Power Radar Imaging System
    • SAR Data
    • Phased Array Radar
      • Through-Wall Radar
      • S-Band MIMO Array
      • IAP MIMO Phased Array
    • Time of Flight Microwave Camera
    • Medical Imaging - MRI
    • Medical Imaging - CMUT Ultrasound
  • Book - Small & Short-Range Radar Systems
  • Courses
  • Radio & Radio Science
    • Radio Science
      • 1.42 GHz Radio Telescope
      • HF Radar
      • Curing Thermoset Polymers
      • Lossy Dielectric Model
    • Amateur Radio
      • 20M SSB transceiver
      • 10&6M SSB transceiver
      • power distribution panel
      • Transceiving with the R390A
      • Portable amateur radio station
      • Mil Surplus & Vinitage Amateur Radio
        • S-76
  • Vacuum Tubes
    • Vacuum Tube Audio
      • Frankenstein
      • Quad-40
      • Mono-Block
      • Battery Powered Tube Pre-Amp
    • Antique Radio
      • Radiola18
      • Colin B. Kennedy 20B
      • Silvertone 4686
      • Olympic 606
      • Zenith K725
      • Emerson Model 888 Transistor
  • Vintage Test Equipment
  • Horology
    • Digital
    • Clocks
    • Watchhes
  • Vintage Computational Devices
    • NCR Class 1500 Cash Register
  • As-Seen on TV
  • Origin Story
  • More
    • About
    • Radar
      • X-Band UWB FMCW Radar
      • Range-Gated S-Band UWB FMCW
      • Range-Gated X-Band FMCW
      • MIT Coffee Can Radar
      • X-Band USB Impulse Radar
      • L-Band UWB Short-Pulse Radar
      • Police Doppler Radar
      • X-Band DC Coupled CW Doppler Radar
      • Unique Approach to FMCW
      • Harmonic Radar
      • WXR-150 sidecar
    • Imaging
      • Synthetic Aperture Radar (SAR)
        • X-band UWB FMCW Rail SAR
        • Range-Gated S-Band Rail SAR
        • Range-Gated X-Band Rail Sar
        • X-Band UWB Impulse Rail Sar
        • Low-Power Radar Imaging System
      • SAR Data
      • Phased Array Radar
        • Through-Wall Radar
        • S-Band MIMO Array
        • IAP MIMO Phased Array
      • Time of Flight Microwave Camera
      • Medical Imaging - MRI
      • Medical Imaging - CMUT Ultrasound
    • Book - Small & Short-Range Radar Systems
    • Courses
    • Radio & Radio Science
      • Radio Science
        • 1.42 GHz Radio Telescope
        • HF Radar
        • Curing Thermoset Polymers
        • Lossy Dielectric Model
      • Amateur Radio
        • 20M SSB transceiver
        • 10&6M SSB transceiver
        • power distribution panel
        • Transceiving with the R390A
        • Portable amateur radio station
        • Mil Surplus & Vinitage Amateur Radio
          • S-76
    • Vacuum Tubes
      • Vacuum Tube Audio
        • Frankenstein
        • Quad-40
        • Mono-Block
        • Battery Powered Tube Pre-Amp
      • Antique Radio
        • Radiola18
        • Colin B. Kennedy 20B
        • Silvertone 4686
        • Olympic 606
        • Zenith K725
        • Emerson Model 888 Transistor
    • Vintage Test Equipment
    • Horology
      • Digital
      • Clocks
      • Watchhes
    • Vintage Computational Devices
      • NCR Class 1500 Cash Register
    • As-Seen on TV
    • Origin Story

Military Surplus & Vintage Amateur Radio

Resurrection — Pressing WW2 Radio Equipment Back Into Service.  Hackaday, Nov. 9, 2016.

BC-224E

WW2 communications receiver used in US heavy aircraft.

CBY-46104, an ARC-5 command set receiver

"WWII Aircraft Radio Roars To Life: What It Takes To Restore A Piece Of History," Hackaday December 12, 2019.

BC-778D

WW2 emergency beacon transmitter, which I donated to the USS Torsk museum ship.  These could be found in life rafts.

MX-138 radar reflector

Foldable radar reflector from WW2, it's huge because of the long wavelengths in use at the time.  These could be found in life rafts.

Signal Lamp CAN Ref No 5a 823

R390A, the best receiver of the tube era

PRC-77 backpack radio

the famous PRC-77 backpack radio used extensively during the Vietnam war

RT618 HF transceiver exciter

Hallicrafters S-76

Amateur radio/communications receiver. Date of mfgr 1953.  There was also a nearly-identical Military version of this receiver.

Hammarlund HQ-170

Ten-Tech Omni-A

"Two Guys, A Hotel Room And A Radio Fire," Hackaday, May 13, 2016.

Vintage Test Equipment

Keeping a fleet of 1950's - 1990's test gear alive and fully operational.

Disclaimer:  Information presented on this website is for reference only.  There are high voltages present in many of these designs that can be fatal.  With some designs shown there is a danger of RF burn that is capable of causing harm to you and others.  Do not attempt to build any of these projects unless you have the proper training and experience.
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