MFJ-616 Speech Intelligibility Enhancer
TM
Instruction
Manual
9
SCHEMATIC
Page 1: ...el Balance control aligns speakers for dead center positioning regardless of speaker placement or differences in ear sensitivity Easy to Operate Large knobs easy to access switches and a wide open pan...
Page 2: ...on and off for comparative listening 8 Input A B Selects between two sources 9 Speaker Disables speakers used when monitoring with headphones 10 Phones Accepts 1 4 stereo headphone plug normally atten...
Page 3: ...bes solar panels etc may damage your unit Never apply more than 15 volts Headphones Use stereo headphones rated at 8 40 Ohms impedance The front panel headphone jack accepts a standard 1 4 stereo plug...
Page 4: ...ecessary to drive the Station Master In many cases this condition is desirable the higher setting may over ride residual amplifier noise and provide better signal to noise performance 3 External Speak...
Page 5: ...settings 300 600 1200 2400 to preference Use the Bypass switch to gauge the effectiveness of each control as you adjust it 5 Headphones Plug in a stereo headset and turn the Speaker switch off out Th...
Page 6: ...quencies contribute 48 of intelligibility but has only 4 of speech energy Do this by turning the 1200 and 2400 knobs fully clockwise You may want to experiment with less levels of boost with the knobs...
Page 7: ...U1B Spkr Spkr Phones Balance Bypass U1C U1D U6 U7 U3 12 Vdc 8 V Reg Power AF Speaker A B Attn Power SW1 SW3 SW5 SW2 Left Right R21 R20 Transceiver sources are fed to inputs A and B at line level SW1...
Page 8: ...condition Insufficient Gain Check for low receiver AF output check impedance of source Controls Don t Function Check Power switch should be On TECHNICAL ASSISTANCE If you have any problem with this u...
Page 9: ...MFJ 616 Speech Intelligibility EnhancerTM Instruction Manual 9 SCHEMATIC...
