Crown Audio VT-15 VT-15 Vacuum Tube Recording Channel Final Test Report

D.W. FEARN
VT-15 Recording Channel
5
VT-15 Vacuum Tube Recording Channel
Final Test Report
Serial Number_______________ Mains Voltage 120/240 set to __________________
Date ________________ Tested by ________ VU Calibrated to _______________ dBm
Test Equipment ____________________________ Microphone ________________________
Frequency Response:
20 cps to 20 kc/s +/- ___________ dB
THD+Noise:
20 cps ______________ %
200 cps _____________ %
2 kc/s _______________ %
20 kc/s ______________ %
Noise:
______________ dB below +4 dBm out
Equivalent Input Noise _______ dB
Operational Tests
Microphone Preamplifier:
-20 pad ________________
Lo-Z input ______________
Phase Reverse __________
+48V ___________________
Line Input __________________
Instrument Input ____________
C->E Switching ______________
Compressor:
Threshold ___________________
Attack ______________________
Release _____________________
Harder/Softer ________________
VU GR Calibration ____________
VU Output Calibration ________
Sidechain HPF ________________
Equalizer:
LFB __________
LFC __________
HFB __________
HF Q _________
HF C _________
Listening Test ____________