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Single channel Transmitters and Super Regenerative Receivers at 27MHz and 49MHz.

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:

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

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:

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

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

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

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:

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

Here is the 9 volt WM crystal controlled transmitter. This is the negative ground version. Shown below at 27MHz and 49MHz: Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

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

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

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:

Circuit Diagram aka Schematic reverse engineered from circuit board
Circuit Diagram aka Schematic reverse engineered from circuit board

Safety, accuracy and completeness of information provided herein is not guaranteed,
so be inspired by it but do not use it as a basis for experimentation or other actions.

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