A three-digit digital decibel (dB) meter. Displays from -99.9 to +99.9 dB (10mV to 100kV).
AUDIO AMATEUR 4/1984 [Sep 1984] (v.15#4) pg. 28
Correction AUDIO AMATEUR 2/1985 [Mar 1985] (v.16#2) pg. 48
Build this decibel meter (dB meter) and measure field strength, read filter outputs, and check oscillator injection values. Est. cost: $50 (kit).
ELECTRONICS NOW Nov 1995 (v.66#11) pg. 112
Audio-level meters. An explanation of the decibel measurement system which uses a logarithmic scale. Includes circuits for both a stereo and mono audio-level meter that outputs voltage decibels.
RADIO-ELECTRONICS Jan 1991 (v.62#1) pg. 69