| Country/Region of Manufacture | United States |
|---|
Check the listing for details. 3S4 PENTODE REGENERATIVE RECEIVER 540 KHZ TO 17.0 MHZ W/PLUG-IN COILS. Condition: New. Listed at 139.00 USD. THIS IS MY VERSION OF THE 1950'S MAXWELL 1S4 REGENERATIVE RECEIVER. IN THIS CASE I'VE EMPOLYED THE 3 VOLT, 3S4 VERSION OF THIS LITTLE VACUUM TUBE. THE 1940 MINIATURE 1S4/3S4 TUBES DO A REMARKABLE JOB AS A REGENERATIVE DETECTORS.
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