Piano adjuster

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it’s A 15 letters crossword puzzle definition.
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Possible Answers: Tuner.

Last seen on: Daily Celebrity Crossword – 9/15/20 TV Tuesday

Random information on the term ” Tuner”:

Antenna tuner, matching network, matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, and feedline coupler are all equivalent names for a device connected between a radio transmitter and its antenna, to improve power transfer between them by matching the specified load impedance of the radio to the combined input impedance of the feedline and the antenna.

Antenna tuners are particularly important for use with transmitters. Transmitters are typically designed to feed power into a reactance-free, resistive load of a specific value, very often 50 ohms. However the antenna and feedline impedance can vary depending on frequency and other factors. If the impedance seen by the transmitter departs from the design load, circuits in modern transmitters automatically cut back the power output to protect the equipment from the consequences of the impedance mismatch.

In addition to reducing the power radiated by the antenna, the mismatch can distort the signal, and in high power transmitters may overheat the transmitter. Because of this, ATUs are a standard part of almost all radio transmitting systems. They may be a circuit incorporated into the transmitter itself, or a separate piece of equipment connected between the transmitter and the antenna. In transmitting systems with an antenna separated from the transmitter and connected to it by a transmission line (feedline), there may be yet another matching network (or ATU) where the feedline connects to the antenna, to match the transmission line’s impedance to the antenna.

Tuner on Wikipedia