[Waraqa]

Does that mean the quality of the voice calls in that era was better than later systems? Since it's logical to have loss of quality when a weak signal is amplified.

[munchlax]

I suspect the quality was poor in the 19th century due to not yet knowing how to make good receivers and mouthpieces.

[Isamu]

Right, quality was poor and the transmitter and receiver were part of the problem. They experimented with different methods, but part of the problem was that without amplification they needed a transmitter that worked at the full voltage necessary to travel the full distance.