KSIĄŻKI POWIĄZANE ZE SŁOWEM «DETECTOPHONE»
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Microphone Transmitter Button 'y make a highly sensitive detectophone by using
tms Transmitter Button to collect the sound waves. You can build your own outfit
without buying expensive equipment. It is simple and inexpensive. You can ...
50 fascinating experiments! li*ht 4000 ft. ranse — secret detectophone. listen in
on private conversations — generate 110-volt electricity— thief detector—
generate health rays— electro-plate. «^ etc. etc. F R E E with kit. Short Course in
...
... Telephone/ Read the inside story of the telephone and build a real, electric
broadcasting telephone of your own. You can also make a Super-sensitive
Microphone that will enable you to hear a fly walk; a Detectophone, a
Stethoscope and ...
4
Hollywood of the Rockies: Colorado, the West and America's ...
A partial list of his accomplishments includes the invention of a Detectophone (
which was exactly what it sounds like: a device for listening through walls that
was used by the US. Secret Service); the invention of something he called an Air
...
The delicate detectophone mechanism of the Luminor responded instantly to her
command; and the room was flooded at once with the beautiful cold pink-white
Lumi- nor-light, emanating from the thin wire running around the four sides of the
...
... 4000 ft. range — secret service detectophone in your home, listen in on private
conversations — generate 110-volt electricity with hand- driven generator —
build electric stove — thief detector — generate health rays — electro-plate, etc.
Also gives instructions for making a Super-sensitive Microphone with which you
can hear a fly walk; a Detectophone, a Stethoscope and other sound-detecting
instruments. You can have great fun experimenting in telephonic and
microphonic ...
Baby Listener,
Detectophone, etc. Supplied complete ready to use with simple
instructions. N.^OA920.!.b.'.-. $6.50 <PI-» Parcel Post. 156 pages of everything in
Radio and Electronics. BURSTEIN-APPLEBEE CO. 1012-14 McGEE, KANSAS ...
5O Baby Listener Detectophone Practical Jokes Comes complete with tube,
batteries, tuner, and .built-in microphone — all ready to operate. Self contained, it
requires no wires or other hookup. Merely tune radio to clear channel, tune knob
on ...
Makes arc furnaces, eavesdropping detectophone, giant light, extension
telephone, generates electricity, etc. Instructions. Educational, fascinating, useful.
Original cost $17.75. Special $2.79. Stamp for bargain catalog. Electrical Salvage
, Box ...
