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Welcome!

January 8th, 2021: Several weeks ago I moved the site to a new web hosting provider and in the process lost some of the more recent content. I will continue to recover the missing content, but decided to go ahead and launch the site in the meantime as several people have reached out regarding the site status.

This is a site for those interested in building their own HF amateur radio station equipment.

The site documents my current station consisting of the Express Receiver, Express Transmitter, and the 6146B and MRF101 amplifiers. I don’t own a commercial rig and operate exclusively digital modes, mainly FT8. I find FT8 to be a fascinating mode in terms of exploring propagation, antenna performance, and receiver performance. As of January 2021, I have 138 / 129 countries worked / confirmed with a 43-Ft vertical.

The Express Receiver was designed and built between 2014 and 2016, and the Express Transmitter between 2017 and 2018. As such, some of the parts I used may no longer be available, however, for most there will be substitutes.

The new site also includes information on the 2020 Transceiver which I am currently building which will be updated periodically as the build progresses.

The 2020 Transceiver started out in 2020 as a concept with the following objectives in mind:

  • Build a highly integrated transceiver
  • Learn KiCad to take advantage of low cost PCB manufacturers in Asia
  • Maintain the building block approach of the Express Receiver / Transmitter
  • Utilize H-Mode Mixers and a Quadrature Sampling Detector (QSD / Tayloe Detector)

As with the Express Receiver / Transmitter, I settled on a standard PCB board size for all the main boards in the 2020 Transceiver (3.5″ x 7″). To achieve the level of integration and accessibility desired, the main boards plug into a backplane that carries power, I2C Bus, and relay controls. As you can see in the image above, the transceiver is designed to fit snuggly into an HP436a Power Meter chassis.

Thanks for visiting.

Rod, AD5GH

January 2021

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