direct-current vacuum-tube voltmeter

direct-current vacuum-tube voltmeter

[də¦rekt ¦kə·rənt ¦vak·yəm ¦tüb ′vōlt‚mēd·ər] (electronics) The amplifying and indicating portions of the diode rectifier-amplifier meter, which are usually designed so that the diode rectifier can be disconnected for dc measurements.