Simple RC Cars - Single channel Transmitters and Super Regenerative Receivers at 27 MHz and 49 MHz

Here is the 9 volt GS transmitter which does not use a crystal. This clever design allows only two transistors to generate both the carrier and and the modulation. Shown below at 27MHz 40MHz and 49MHz:

The 6 volt GS super regenerative receiver. Note that the 6 volt supply which consists of 4 AA cells is center tapped and feeds a 3 volt motor. Shown at 27MHz 40MHz and 49MHz:

Here is the 9 volt WH crystal controlled transmitter. It is unremarkable. Shown below at 27MHz and 49MHz:

The 6 volt WH super regenerative receiver. The 6 volt supply consists of 4 AA cells and drives a full bridge to run a 6V motor. A zener provides a nice stable voltage to the RF transistor. Shown at 27MHz and 49MHz:

Here is the 9 volt WM crystal controlled transmitter. This is the negative ground version. Shown below at 27MHz and 49MHz:

Here is the 9 volt WM crystal controlled transmitter. This is the positive ground version. Shown at 27MHz and 49MHz:

The 3 volt WM super regenerative receiver. The 3 volt supply consists of 2 AA cells drives a full bridge to run a 3V motor. Shown at 27MHz and 49MHz:

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