matching transformer in a sentence

Examples

1. More commonly, the impedance is adjusted at the load ( see below ) with an antenna tuner, a balun, a matching transformer, matching networks composed of inductors and capacitors, or matching sections such as the gamma match.
2. A line "'isolation transformer "'for telephone use is a special type of impedance matching transformer that is used to couple telephone land lines to subscriber equipment to prevent dangerous common mode voltages from appearing on the line.
3. I have tried different cables, different inputs on the amp, even a new sound card for my PC . I did some research about ohms matching transformers but, am not sure what to get or if that is even the answer.
4. Notable exceptions are various " OTL " ( output-transformerless ) tube amplifiers, pioneered by Julius Futterman in the 1950s, or somewhat rarer tube amplifiers that replace the impedance matching transformer with additional ( often, though not necessarily, transistorized ) circuitry in order to eliminate parasitics and musically unrelated magnetic distortions.