I have been wanting to work QRPp for while after reading about contacts CW ops were making on 80mW. The idea was to make a simple crystal controlled transmitter and use the 705 as the receiver. Than I read about the MFJ-813 which is advertised as a 5W QRP watt meter. Yesterday one arrived and has just been tested.
The 813 is reasonably accurate for such a low-cost meter. Starting with the 705 I set the power to 5W the meter showed 5W. Then I turned down the power to 5% and the 813 meter reading was remarkably close to 500mW. Turning down to 1% output on the 705 the meter read 100mW.
Next are some on air tests with 100mW – 1W power levels.