One of the most impressive QRP modes is Joe Taylor, K1JT’s WSPR (pronounced “whisper”) mode. WSPR stands for “Weak Signal Propagation Reporter.” WSPR is designed for sending and receiving low-power transmissions to test propagation paths on the LF, MF, HF, VHF and UHF bands. The process is similar to a beacon. Users with Internet access can watch results in real time at

TAPR offers two versions of a WSPR “hat” to use with Raspberry Pi single-board computers:

  1. 20m, 30m, 40m fully assembled and tested
  2. 15m/17m, 10m/12m partial kit – user has to solder low pass filter (supplied)

Click on the appropriate WSPR transmitter link for more information

TAPR has no connection with Raspberry Pi.

Note: Raspberry Pi, power supply, SD card and antenna not included.

Documentation and Files are available at:

WSPR Documentation and Files


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