About 100Yen shop and 100Yen
radio".... was sold in this package
shop" at price of only 100Yen
Recently there are
many "100Yen shop" in Japan ,at where many many kinds of merchandizes
are sold. Many of them are sold at same price of only 100Yen (about
US$ 0.95) . We can also buy tools and some materials for
making radio, like screw driver, nipper, pliers, drill, acryl plate, wire, and
so on. Electronic parts are not sold but some
merchandizes containing electronic parts (small speaker box, clock, ear
phone etc) are
And once at 100Yen shop, 3-transistor suprt het radios
are sold. Of course, Price of them are also 100Yen. When this
radio appeared in 100Yen shop, many radio amateur surprised because
3-transistor super het uses many expensive parts for this sort of cheep
radios and need complicated adjustment.
It contains many useful parts
for radio amateur, like IFTs, OSC, 2-gang variable capacitor, switched
volume control ...and so on. Japanese radio amateur called this radio
Many radio amateur in Japan buy them and convert to various
kinds of electronic equipment. Or they take apart it and take out
parts and use these parts to make other radios. I also used this 100
Yen radio to make some of my radios posted on this web site.
regrettably, this 100 Yen radio had been disappeared last year (2004), may be
discontinued. Even today, We can buy some kinds of radios at
100Yen shop. But all of them use 1 chip radio IC, And so, they contain only
a few useful parts for radio amateur.
Left: D-cell for size
useful parts were
Block diagram :
: 3.5"x2.2"x0.9"(except protrusion of
Transistor : S9011x 2 S9014 x
1, and 1-diode
(switching type diode is
*Without power amplifier and loud speaker.
Schematic : Almost standard
circuit as above block diagram.
AAA-cell x 2
Earphone : 32ohm
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