Antenna Setup for Crystal Radio



Antenna for Crystal Radio can be setup in backyard or tall building, as high as possible , you can pick up much radio signal.





  Recommended Product Antenna :
This is Tune Trapper Marine Antenna for Boat, also suitable for Fiberglass boat Car, RV, where ground plane no exist. You can install it in any place that suitable, no power need, no ground, no amplifier need. Made in USA and water resistant. Have Tested, have good reception in AM/FM Band. Just plug in to your antenna connection in your radio and Tune to FM 87.5 MHz-108 MHz.
This Tune Trapper is 1/2 Wave Helical Dipole
For Marine used, this antenna is sealed housing by PVC for defend from harsh marine use.This Tune Trapper dimension is 24 inch long and 1/2 inch diameter, complete with 6 feet 95% copper wire with standard motorolla connector, is USA handmade. Performance is guaranteed, and this Tune Trapper in bench tested, for make sure crystal clear reception.

Radio Crystal With One Transistor 2SB178


This Circuit is simple with One NPN Transistor 2SB178, Signal
 selected from LC circuit and pick up with Germanium
 Diode IN34A or IN60 or OA70 and Amplified with Transistor 2SB178 and with Earphone or Headphone with Resistant about 8-2000 Ohm.

The component list

COMPONENT '60 Turns' = L
COMPONENT '500 pF' = CV
COMPONENT 'IN34A/IN60/OA70' = D
COMPONENT '10 nF' = C
COMPONENT '5K6' = R
COMPONENT '2SB178' = TN
COMPONENT '4K7' = R
COMPONENT 'Earphone 8 - 2000 Ohm' = SPKR
COMPONENT '100uF' = CE
COMPONENT 'SWITCH' = SWITCH
COMPONENT '1.5V' = BATTERY
COMPONENT '' = GND

Straight Radio or Crystal Radio


OA70 / IN34 / IN60 is Germanium Radio, choose only one type. Antenna high from Ground is high is possible, ground is a must to Steel Water pipe, or making one from a piece of copper approximately 1 meter down to the ground, so will be voltage between ground and radio wave pick up by antenna.

I have build this Radio and connected input speaker to line input notebook and running with Open Lab software and can pick up Radio Signal from about 6 km air distance.

====+  Parts List for   +====

10 nF                              1   Capacitor
VC 500 pF                     1   Variable Capacitor
OA70/IN34/IN60          1   D
GND                              1   GND
108 Turns,12 Turns        L Tap between 108 Turns and 12 Turns
8-2000 Ohm                  1   SPKR or Earphone 8 - 2000 Ohms


This is one of Product of Crystal Radio Kit with Mineral Gateway as Diode and without Battery, this crystal radio specification :

  • Conduct a radio wave experiment
  • Capture AM broadcasting radio waves
  • Works without the need of a battery
  • Science guide included (68 color pages)
  • Another fun, educational product from the company that brings you Snap Circuits