Eddystone 940
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| Frequency | RX: 0.48–30 MHz (5 ranges) |
| Power | Receiver only |
| Modes | AM, USB, LSB, CW |
| Weight | 19.5 kg (43 lb) |
| Connector | antenna/earth terminals (British; not SO-239) |
| Year | 1962 |
| antenna | antenna/earth terminals (impedance unspecified) |
Eddystone's last great tube communications receiver. A crystal filter, an S-meter, flywheel tuning, and a BFO for SSB/CW, with the build quality Eddystone was known for. The 940 was a standard monitoring receiver for the BBC and British government stations.
43 pounds. No longer supported. British tube types can be hard to source. Eddystone closed in the 1980s. Documentation is via British vintage radio groups.
British engineering at its peak. The Eddystone 940 was the last great British communications receiver, used by the BBC to monitor their own transmissions and by government stations across the Commonwealth. A clean 940 is a capable and beautiful receiver.
The Eddystone 940 is a British general-coverage communications receiver, one of the last valve receivers from Stratton & Co's famous Eddystone marque, designed by Bill Cooke in a matter of months in 1962. It covers roughly 480 kHz to 30 MHz in five ranges, receiving AM, CW, and single sideband via a crystal filter and product detector, with an S-meter and the smooth slow-motion flywheel tuning that made Eddystone receivers prized.
A twelve-valve single-conversion design with a low-noise cascode front end and a 450-kilohertz IF, it was an Eddystone "stop-gap," built largely from stock parts to fill the price gap between the company's professional sets and its cheaper domestic models. It was a standard monitoring receiver for the BBC and British government stations, and weighs about 19.5 kilograms (43 pounds).
One known quirk: its cascode front end can break into parasitic oscillation near 60 MHz on the top band, which owners cure with anode stoppers. Variants included rack-mount (940/RM), fixed-crystal (940/1), vehicular (940/2), and Coastguard (940/3) versions. The antenna connects to a terminal arrangement typical of British sets rather than an SO-239. It is a discontinued classic. Compare it with the VHF 770R and the transistor EC-10.