Mceljo,
AC voltage is a sine wave, as your EE friend points out. However, it is expressed as a single value, e.g., 120 V or 117 V etc. That value is actually the root mean square (RMS) of the entire sine wave. One possibility is that the claim regarding linearity is with respect to the RMS. If the AC is linear, it is not AC, it is DC.
RJA, I don't know how much about tubes might be taught in current schools. In a sense, it is irrelevant. A good program produces graduates who are self educators, not just people who can regurgitate what one of their professors said 16 years ago.
Chris is a straight shooter. I have bought enough stuff from him that I trust what he says. Plus, there is a 14 day trial. If my life weren't in a complete state of flux, I would give one of these a try myself.
AC voltage is a sine wave, as your EE friend points out. However, it is expressed as a single value, e.g., 120 V or 117 V etc. That value is actually the root mean square (RMS) of the entire sine wave. One possibility is that the claim regarding linearity is with respect to the RMS. If the AC is linear, it is not AC, it is DC.
RJA, I don't know how much about tubes might be taught in current schools. In a sense, it is irrelevant. A good program produces graduates who are self educators, not just people who can regurgitate what one of their professors said 16 years ago.
Chris is a straight shooter. I have bought enough stuff from him that I trust what he says. Plus, there is a 14 day trial. If my life weren't in a complete state of flux, I would give one of these a try myself.