QRN, there is a huge difference between the iron used in the broadcast transmitters you mention and the "communications quality" iron used in ham boat anchors. I agree 15 Hz to 12 KHz is good response but I can get 1 Hz to over 50 KHz without even trying hard on the 940. I have to cut the high end off because it's too excessive. The real deal is the positive audio peaks with the 940. It's possible to get 200% positive peaks although I don't run much past 125%.
Plate modulated transmitters usually can't come close without flashing the spark gap on the mod iron. Plus there is something to be said about obtaining this type of audio from a modern transceiver with digital display, no drift, no tune output stages, auto antenna tuner, and memory channels.
Linear Mode
