Just to set the record straight, I wasn't taught tube circuits in school it was pretty much solid state stuff. Field Effect Transistor circuits are somewhat similar to tube circuits. I looked at information on several other RF generators like EICO 324 and Heathkit IG-42 and IG-102.
I took some pictures of the output of my modified generator.
The first shows the modulated RF output as well as the 400Hz signal.
The second shows output at about 500KHz on the lowest range, some distortion.
The maximum output amplitude varies from about 1Vpp at the top of the lowest range A, to about 40 mVpp at the top of range D (25 MHz). Range E never worked and couldn't find a fix.
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