Wolf 7 amplifier IMD 3

DAC driver output — intermodulations somewhere at the noise floor 🙂 :

50W 37dbc = 43db PEP:

80W 31dbc = 37db PEP:

100W 26dbc = 32db PEP:

40m — 29dbc — 35db PEP:

Just for info — appnote, looks like they are using db PEP and it’s 1 stage amplifier:

Just an example from FTDX3000 parameters:

rd100 current — 500ma, rd16 current 500ma

VHF module- 24dbc — 30db PEP: