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DUNWOODY HIGH PERFORMANCE CRYSTAL RADIO KIT
U.S. Army Signal Corps General Henry H. C. Dunwoody received a patent for the
carborundum crystal detector in 1906 and this fine crystal set kit was named after
him. It is a very selective and sensitive design that employs two tuned circuits.
The tapped coil circuit allows selection of frequencies from below the bottom of
the A.M. Broadcast Band all the way up to about 12 MHZ in the Short Wave bands.
The quality pine base, all parts, screws, washers, sandpaper, and wire are
included. The easy-to-understand instructions were designed for beginners,
however the coil winding is at a level of difficulty for adults or more experienced
young builders. Soldering is required. This set requires a high impedance
magnetic headset or ceramic earphone (see our EPH-1 on the next page). An
outside antenna is necessary for optimum performance.
Order KIT-DUNWOODY Price Each $44.95
ARMSTRONG ONE TUBE RADIO KIT
This one-tube (3S4) radio kit is a powerful distillation of many circuits for one-tube
sets that have appeared since Edwin Armstrong invented the regenerative circuit
in 1912. It covers the A.M. Broadcast Band from 550 KHZ -1700KHZ. The kit
contains the tuning capacitor, in-circuit tested N.O.S. 3S4 vacuum tube, tube
socket, fahnestock clips, solder lugs, resistors, capacitors, regeneration
potentiometer with switch, coil form, mounting brackets, stand-offs, screws,
magnet wire, hook-up wire, knobs, battery holder for "A" batteries (2 "D" cells),
battery clips for "B" batteries (5 9volt batteries), and a ready-to-finish routed wood
base. It is easy to construct and the directions are very easy to understand and
follow. Soldering is required. This set requires a high impedance magnetic
headset. An outside antenna is necessary for optimum performance.
Order KIT-ARMSTRONG Price Each $52.95
PICKARD CRYSTAL RADIO KIT
Greenleaf Whittier Pickard invented