Total posts : 45366
Tim’s field tests have given us a never before available look at what typical certified Part 15 FM transmitters are doing.
Right at the same time I obtained a new C.Crane FM2 and, keeping in mind Tim’s finding that adding audio cables sometimes increases the radiated power, I have added a 10-foot extension to the audio so I can locate the transmitter over there.
On the spectrum analyzer the field strength increased 2 dBu.
What I did to compensate was collapse the telescoping antenna of the transmitter until it was back down by 2 dBu, thus now having the audio extension and retaining the certified output.
Some would not agree, but Part 15 operators are good thinkers.