Kanga Whisper Mite :
Dual Band WSPR Beacon Transmitter
The Kanga Whisper Mite is a low cost, compact standalone Dual Band WSPR beacon transmitter. No computer needed so can be popped in a shed, holiday home, caravan etc Time sync is done by one pushbutton on the front to set the very accurate RTC internal to the KWM . Transmissions are made every 10 minutes (or user selectable time intervals). Time keeping is kept during power cycles by a small on-board 3v button cell. We are using a special version of the si5351 module in this kit with a exceptional high stability (0.5ppm) TXCO for great performance. (Unique to Kanga)
Designed for low power operation giving out 200mW of RF which is a ideal figure for this low power beaconing mode. 3 versions Low Band 60m and 40m, Mid Band 30m and 20m, and High bands 15m, 12m and 10m (you select which two bands in setup menu)
Users need to first configure the Callsign, location and power level reporting via a terminal emulator plugged (windows or mac will do this) into the USB port on the front of the unit. The KWM runs from just 5v and a simple phone PSU or the like will support this. Standby mode current is around 50mA and transmit is less than 150mA.
Comes with a FREE BONUS kit (QRPp Power Checker) that allow you to measure the RF output power
Please Note!
This is NOT suitable for a first time project, with the more complicated setup and care needed for the build it could be one of the more challenging projects for inexperienced builders and for those not familiar with WSPR
Please read the build and setup instructions before purchase. if unsure about which band i would suggest the Low Band version as that will get you the most 'spotters' as its a VERY popular band for WSPR all over the world.
Keep Scrolling Down for more information, software, and instructions how to build and setup your kit
IMPORTANT .In order to setup the Kanga Whisper Mite (KWM) you will need to connect it to a computer once to enter your own information (Callsign and 4 fig Locator). A simple terminal emulator is all that's needed and we have links for a great Free one below (or you can use any other you wish). you MAY need a USB driver (CH340) for the computer to see the Com port on the KWM so we have a download for that below too! we provide the calibration factor for the si5351 module used in this kit but you can complete your own calibration at any time due to its built in software, for that you will need to use software to see the audio signal produced by a receiver, we have provided Argo Software for that too (see below)
The KWM is designed to run from a USB 5v supply or the low cost USB power blocks that are normally used to charge phones etc. the average current consumption of this works out to 70mA over the typical 10min cycle so a 1000mA battery pack will run the KWM for over 12 hrs on one charge, This is simple beacon transmitter and gets you up and running for a very low price and doesn't tie up a computer and your base station radio costing over >£1000 just to send out a low power WSPR beacon on a couple of bands. Its is advisable to read the full instructions BEFORE you purchase the kit. Its not ideal for a first time builder but a good second project for adventurous builders.