"It needed a .1mfd cap to get going real well and operates on it's 2 original Heathkit tubes."
How do you know it's operating "really well"?
What is the frequency response of your oscilloscope? Are you running the SG-8 at a higher frequency than the o'scope can see?
Are you connected to the RF output (not the audio output)?
What do you mean by "bandwidth isn't changing?" Do you mean frequency isn't changing?
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Old TV literature, New York World's Fair, and other miscellany
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