Low Frequency Radio Receiver Circuit Project
Low Frequency Radio Receiver Circuit Project
Low Frequency Radio Receiver Circuit Project
The receiver is designed for use with any of our high impedance
antennas starting with the letter "C" in the model number, in the
range of 10 KHz to 530 KHz. The antenna's tuning adjustment (via a
variable or fixed-value capacitor, sold separately) is what selects
the receive channel.
This radio will drive any common audio amplifier (like the Radio Shack
mini-amp) loudly to room-filling volume.
If you don't want to use an external amplifier, it also powers a
crystal earphone directly from the output jack.
Power the radio with a rechargeable 6 volt lantern battery. The radio
will run a -very- long time, it only draws @ 10 mA, making it
excellent for research uses where it has to run on solar or battery
power only. The radio will also work on 9 volts without any problems.
Power the radio and audio amplifier only with battery power to prevent
AC power buzz noise.
The PARTS:
The parts and values are shown on the diagram above on this page.
Standard values used. General parts available at any electronics
store. Antenna and tuning capacitor available here at
WWW.STORMWISE.COM
NOTE: You can omit the meter and meter drivers if you don't want a
meter, the receiver will work fine without them.