Enhanced voltmeters for the most part have an info obstruction of 1, 10, or 20 megohms autonomous of the range chose. A vacuum tube in the speaker circuit is utilized as a part of this instrument and subsequently called the vacuum tube voltmeter( VTVM). 

Particulars: Measurement of AC and DC voltages from 1.5 to 1500 Volts FSD in 7 territories. Estimation of Resistance from 0.2 ? to 1000M? out of 7 decade ventures with ohm to 10M? focus scale. Recurrence Response :10 Hz to 500 KHz.Input impedance 10M? for DC, 1M? for AC at low frequ-encies.Accuracy for AC/DC Voltages : ±3 % of range.Accuracy for Resistance Range : ± 5% of focus scale upto 1M?.

Manufacturers and Suppliers of Vacuum Tube Voltmeter (VTVM) in Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, Philippines, Tanzania, Uganda