Total posts : 45366
As these notes on AM25 accumulate there will be a Manual Addendum fit for publication.
Yes a “turn key” product made easy for the non-technician is a worthwhile objective. The AM25, for me, has been the perfect unit for tinkering which is exactly why I have it. I do respect the design of the unit and I think it was modeled after a higher power design and is therefore a challenge to operate at Part 15 limits. But the responsibility is with the end user, and that’s us.
The difference between “voltage” and “power” is important to realize, but what did the manual author mean? Did he/she mean voltage when saying power?
To build on everything said so far, I paraphrase something in the SSTran AMT3000 Manual, that its output is intentionally designed for the high impedance of a 3-meter wire (unless modified for the optional low impedance grounded system). By comparison the AM25 employs the standard 50 ohm output found in professional transmitters, which expect to see at least a 1/4 wavelength antenna plus ground-system. I believe that’s exactly why it doesn’t compare with the SSTran in simple installations.
Every issue we’ve discussed is part of the overall theme of this thread, “Modulation,” because everything interacts within the transmitter system. The idea of combining the two transmitter is very interesting.
One strength shared by both transmitters is frequency stability and good harmonic rejection.