TVC= transformer volume control.
It's a transformer with one primary (or two) and very many secondaries (20-30) each of which "transforms down" thereby offering a different level of attenuation.
Each secondary is connected to a different position on a multiposition switch which works as a "volume" pot.
It's a transformer with one primary (or two) and very many secondaries (20-30) each of which "transforms down" thereby offering a different level of attenuation.
Each secondary is connected to a different position on a multiposition switch which works as a "volume" pot.