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Impoverished radio experimenter iii - how to book


Tricks, tips, and secrets to help the builder of simple radios and electrical gear achieve high performance at minimal cost!
You can t build anything, mechanical or electrical, unless you have useful measuring tools. The first part of this new volume shows you how to build a simple impedance bridge. That will allow you to measure inductors and capacitors to two significant digits. That means if you find an old choke in a radio chassis in an alley, this will tell you if it is 2.5 henries or 17 henries. This bridge will tell you if that old paper capacitor you removed from the underside is still .01 mfd or has changed.
Not only can you test old commercial parts of unknown value, you can also build your own capacitors and inductors and measure the results. Then you can intelligently use the parts to build all kinds of radio gear.
You will find plans for a simple one IC oscillator that will put out a 150-1500 cycle tone. Use it on the bridge or for other tests. You ll get plans for another very simple one IC amplifier that will make a pair of low impedance Walkman type headphones, available almost anywhere, look like a pair of 2000 ohm phones which are not so easily found.
You ll learn how to make pointers for knobs and shielded cases from low-cost lumber that will make your home built gear look like expensive antique radios. You ll see a large homemade variable capacitor built from surplus printed circuit boards and shaft collars, and the simple one-tube shortwave regenerative receiver that was built around it.
Your impedance bridge will allow you to experiment with audio filters that will dramatically improve the selectivity of a regenerative receiver so that you can copy code in crowded amateur radio bands.
And you ll get some ideas for that larger power supply you ll need for more advanced receivers and transmitters.
Lots of nuts-and-bolts how to. Heavily Illustrated. More ideas than you will be able to pursue in a month of Sundays.



Impoverished radio experimenter iii - how to book