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> Impoverished radio experimenter ii - how to book
Impoverished radio experimenter ii - how to book
You can wind a coil and hook it up to a capacitor, but how will you know if it is right? A grid-dip oscillator or gdo, is a measuring device that will tell you. And its very simple first used in the 1920 s.
You ll learn to use the gdo along with simple formulas that will put your tank circuits on the frequencies you want. You can use other formulas along with a known coil or capacitor to measure the value of an unknown coil or capacitor. In other words, for a radio builder, you got to have a volt-ohmmeter and gdo. Otherwise, you are just wasting valuable time.
You ll learn how to take a pentagrid converter tube and build a one-tube shortwave converter that will put shortwave broadcast stations on a frequency that an ordinary AM radio, or crystal set for that matter, can receive. Listen to the reasonable BBC out of London, or stations in Canada, Germany, Belgium, China, Cuba (talk about BS!) and elsewhere.
Make a top-rate slow-motion dial drive for your radio. Its 7.5 to 1 ratio makes tuning stations easy far better than many expensive antique dial drives.
Make a simple rig for winding professional quality hi-Q space wound coils.
You get many more hints, tips and ideas for exploration. Stop whining! Build your own parts. You can do it!
