June 24 1970 Concord Transcript — “Ham Radio Test Slated”
June 24 1970 Concord Transcript — “Ham Radio Test Slated” Date: June 24, 1970 Location: Concord / Walnut Creek / Mt. Diablo, Contra Costa County, California Motif tags: [Mt. Diablo] [Phillips Petroleum] [Signal / Transmission] [Ham Radio] [Z32] Source: Concord Transcript , June 24, 1970, p. 17 — “Ham Radio Test Slated” Archival citation: Newspapers.com CHS Cross-Links: • Spatial Axis: Mt. Diablo as Communication and Cartographic Hub • Temporal Symmetry: June 24 → June 26 1970 (Z32 / Phillips 66 Map) • Motif Echo: Energy → Signal → Geometry (Phillips Petroleum → Mt. Diablo → Zodiac Map) Motif — Transmission, Power, and Encoded Signal The Concord Transcript article of June 24, 1970 documents a planned Mt. Diablo field operation by the Mt. Diablo Amateur Radio Club as part of nationwide “Field Day” exercises concluding Amateur Radio Week. The article emphasizes portable transmission, generators, antennas, and two-way shortwave communication ac...