I agree, it sounds like something 73 would have run. An amp with a
half dozen tubes sounds like something from 11 meters. I'd shoot for
fewer, bigger tubes myself.
My experience and recollection regarding Ham Radio Magazine was that
the first 3 or 4 years focused on what I'd call mainstream ham radio:
HF topics like beams, 3-500Z amps, etc. Around 1971 or '72 the focus
switched to solid state, digital logic and RF on VHF and above. EME,
Gunn diode microwave transmitters and horns....things like that. I
imagine Tenny and Fisk decided they couldn't compete with QST, CQ and
73 in the average joe ham world, and carved a niche in the more
advanced technical arena, which ARRL tried to horn in on, with QEX
about 10 years later. A 572B amplifier article for HF doesn't sound
like a Ham Radio article in the late 1970s.
Rob
K5UJ
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