DEHS Burns Spring Lecture 2019 equipment display: VHF Technology development – British TR1153 left, earlier British 1133 opened up centre, US SCR 522 right (Phil Judkins). Photo by Dick Green.

DEHS Burns Spring Lecture 2019 equipment display: VHF Technology development - British TR1153 left, earlier British 1133 opened up centre, US SCR 522 right (Phil Judkins). Photo by Dick Green.

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