Total posts : 45366
“Just to note that the unlicensed power permitted by the FCC for a compliant transmitter certified under §15.219 refers to the d-c input power supplied to the final r-f amplifier of that transmitter, without modulation. The legal, unmodulated OUTPUT power for those same conditions could not exceed the legal, unmodulated INPUT power — as that would require a circuit efficiency greater than 100%.”
Correct! Perhaps send Radio Systems a reminder about that too.
Ain’t nothing anyone here or elsewhere can do anything about the TH’s measured outputs beyond 100mW DC input. It (TH) was given the OK to operate at those slightly higher power levels to boot. I would say that the FCC has no real issue with a few extra mW or uV..since that TH currently carries a valid certification..eh?!!
You should see what the modified (questionable legality of the modifications made) iAM unit’s measure! Double them from Phil’s noted lists of readings..particularly the second list which is far more accurate and correct than the first. Obviously the first test list results are from an improper testing setup.
When I tested my TH V5 unit (not iAM), on 1670 it measured 135mW at the F connector. Pretty darn close to the 2nd listed results on 1650 at 144mW measurement eh?!!
Outside validation to my posted testing results months ago. Wow…imagine that! Maybe this RFB guy really does have professional testing gear recognized by the FCC and what he posts isn’t a bunch of nonsense and he knows what the F he is doing..AND talking about.