Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
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> Impoverished radio experimenter iv - how to book
Impoverished radio experimenter iv - how to book
Some guys think you could never build a regenerative receiver as good as the National s old SW-3, for instance. That s bull. You should be able to build something every bit as good, if not better. And the ideas for that are here.
First we start out with a demonstration receiver that will hit you with many ideas, some of which you will want to try. This receiver is a four tube regenerative with an RF amplifier (TRF). The original configuration uses two audio tubes with audio filter in back end. The second version uses a simpler audio filter, and the second audio tube is replaced by a power tube that will drive a loudspeaker to surprising volume.
Next the shortwave converter idea of VOL 3 is taken to the next step: a modern tube and a crystal controlled oscillator. When this unit was put in front of the TRF receiver, 15 meter (21mhtz) amateur band signals came flooding in from all over the planet, loud, stable and distinct.
Then to make tube experimentation easier and larger projects possible, we build a quality power supply capable of providing a wide range of voltages at high current levels.
Finally we explore slide rule dials. These simple, inexpensive fabrications of string and pulleys were used in millions of old broadcast radios, and they worked beautifully. You ll see how to build one from aluminum plate and simple pulleys that can be mounted on a homebuilt receiver. You get a slow motion dial drive with a long bandspread dial that makes your homebuilt receiver fun to use and will impress the socks off your half-wit relation.
More useful ideas for the radio builder. With schematics, drawings, and photos. Jam-packed like the first 3 volumes.
