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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

Watch Restoration & Servicing

Publications

Mechanical Watch Hacker Gets An Apple Watch. Hackaday, Aug 17, 2015.

'Go Vintage! Learn To Repair And Restore Mechanical Pocket And Wrist Watches.'  Hackaday, July 8, 2014.

Synchronizing a Mil wristwatch to WWV using an R390A

Sometimes its fun to do a mash-up of old things.

Servicing a Waltham Riverside pocket watch

the Riverside was one of the higher end movements offered by Waltham, just below railroad grade

Restoration & Servicing a Guilford Watch Co. wrist watch

This watch won a Blue Ribbon at the annual Guilford Fair in 2020, sharing some town history with everyone.

Servicing a New York Standard pocket watch

These may have been lower end watches, but  well built nontheless, like many things at this time.

Servicing a 1920's flapper-era hexagonal waltham pocket watch

This case is unique!

Servicing an Elgin pocket watch

Servicing a Waltham S18 Model 1883 pocket watch

It's huge!  Nothing like an S18.

Servicing a Ladies Elgine pocket watch

Servicing a Hampden Watch Co. Pocket Watch

Servicing a 15J Waltham pocket watch

Servicing an Elgin 7J with hunter's case

Servicing a Waltham 15J S16 pocket watch

Hamilton S16 pocket watch

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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