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WA3KEY presents everything you need to know about the Collins 51J4.
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VE7DJX, Jan Skirrow. Information on the R-390 series of radios, including some edited collections of e-mail that provide a quick overview of the radio, its quirks and problems.
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The Story of Eddystone Radios from 1898 to 1973. There are 36 pages of history and model data.
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Technical information for popular German tube-type communications equipment.
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WA5VLZ, Neil, shows the tube line-ups and gives a description of each model.
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WA5VLZ provides information about this classic receiver with description, and pictures.
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Links to the HBR tube receivers, and Heath gear mods.
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Information on full range of Racal RA series receivers and associated equipment.
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Articles about these communications receivers and others at the "Phil's Old Radios" site.
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Information, pictures, and notes. By Nolan Lee.
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Details on rebuilding Collins R-390A receivers. Pictures show details of restoration, and documents are available to help you.
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Picture and description plus a fault-finding section to help with repairs.
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Specifications, photos and history of this rugged WW2 era receiver.
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Construction article for building this receiver accessory to filter out crud. Schematic diagram and parts list are included.
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Specificatiosns and pictures for a variety of old shortwave receivers.
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An unusual early Yaesu radio.
