I ran 200W of CMSK8 for two hours last night, with 100% copy at VK2DDI (2200km range) and good copy with very deep fades at ZL2AFP (500km range). Copy was good in VK2 well before sunset.
Later in the evening a test with 50W of CMSK63 was also 100% copy for long periods at both locations. The transmissions were on 508.150kHz. I used a Redifon DU505 exciter. The transmitter is Class D H-bridge and the antenna a base loaded inverted L with 7.5m upwire, and three 30m top wires. Both receiving stations used PA0RDT mini-whip antennas. 73, Murray ZL1BPU
