June 2024
Intermediate to advanced
280 pages
11h 5m
English
Content preview from Make: Radio
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30 Make: Radio
bearing in mind that when you add turns, the higher inductance reduces the
resonant frequency.
You can also try different diodes. At a location that is relatively far from
AM transmitters, a BAT48 Schottky diode and an AA119 germanium diode
perform similarly. Nothing was audible when I used a 1N4148 silicon
diode, which was not a surprise, because of its higher threshold voltage.
With another type of Schottky diode, the 1N5817, nothing was audible—so
evidently not all Schottky diodes function interchangeably.
If you are in an urban area, you may hear more than one radio station, with
their signals merging, because AMR1 isn’t very ...
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