1) Bill Meara WB2QHL tries in summer 1976. Fails.
2) Rick WD5L tries in 1977. Can’t get the needed parts.
3) Kirk Kleinschmidt NT0Z tries and fails during the late 1970s.
4) Mike Bryce tries and fails.
5) Tony Mula K6QIC succeeds builds one (with Codzilla) 1977.
6) Builder unknown. I bought a HA5 at a hamfest in 2023. It works. barely. Had the C-14 cap.
7) WB5PRR built one. Featured in Feb 1980 QST
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Jim Giammanco N5IB succeeds. Shows RX in Atlanticon 1999.
Bill Meara N2CQR build one in 2014 that works.
Doug Hendricks built a version of one in 1998 and got it working.
Glen Torr VK1FB built a version of this receiver and got it working around 1998.