ok1iak's blog

Whisper with ATS-3b.

I implemented WSPR beacon transmit mode into ATS3bv-1.5 firmware. It is not the very first standalone WSPR beacon implementation, but it is the first WSPR beacon implementation for a stock
transceiver or transceiver kit. For those not familiar with Steve Weber KD1JV ATS-3b creation, it is a tiny 6 band CW/digital transceiver kit fitting into the Altoids tin.


My alternate firmware may be downloaded from


To get your ATS-3b rolling with WSPR, you will need to download ATS3bv-1.5 firmware, replace
beacon messages in the firmware with yours and flash your transceiver with the modified firmware. The beacon messages are generated by wsprgen application. wsprgen is a tiny windows application based on Mark VandeWettering's genwspr Python script.