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The lower right-hand switch was wired back to the K-111 to provide an "on-off" switch at the receiver.The first AF amplifier was a resistance coupled amplifier while the second AF amplifier was transformer coupled along with an output transformer.Though not the first Shortwave receiver kit offered by Pilot, the three-tube "Wasp" was certainly their first really popular Shortwave receiver kit.In 1928 the selling price was .75 including the coils.Builders were warned to adhere to the wiring layout shown on the drawing or performance would suffer.

Shown to the left of the K-115 is the K-120 Audio Booster Unit, another Pilot module (though it is not called "Redi-Blox") for builders, that could be used if loud speaker volume was desired.The "Super-Wasp" kit sold for .50 including the five pairs of plug-in coils providing tuning coverage from 500 meters to 14 meters or about 600kc up to about 21.5mc.Detailed instructions, including a full size blue print, made assembly relatively easy and assured that each "Super-Wasp" could perform pretty much as expected.The "Wasp" was designed by Robert Kruse and Milton B. The plug-in coils selected the tuning ranges that covered 500 meters to 17 meters or about 600kc up to 17.6mc.A complete coil set featured five coils each with color-coded handles for identification.When everything is correct, the Pilot "Wasp" and "Super-Wasp" receivers are fine performers considering their vintage and a lot fun to use. started in business manufacturing toys and parts in 1914 (as the National Toy Co.) By the mid-twenties, National Co., Inc.

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