All, measured the noise figure of my TAPR hermes. Test equipment is a SKTU R&S noise source and a 400 E HP RMS voltmeter. Hermes is supplied via the built in DC/DC converter. Here are the numbers 28 MHz 10,5 dB 29 MHz 10,4 dB 30 MHz 10,2 dB 50,1 MHz 11,9 dB 51,0 MHz 12,1 dB 52,0 MHz 12,6 dB 73s, Peter - DK7SP