Abbingdon Music Research PH-77 Reference Class - Manual (Page 16)

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Use the front panel / buttons (F2) or on the remote control (RC7) to select the type of cartridge based upon the
specifications and/or type of cartirdge to be used. After each change of type, the PH-77 will mute for 10 seconds to
allow the gain circuit to settle into the new configuration.
Once the desired selection has been made, press the front panel button (F3) or on the remote control (RC6) to
confirm the selection and continue on to the next item.
4.3 Individual Gain Settings
In accordance with whether Input switch (R3) has been set to ‘Direct’ or ‘Normal’, “Setting Gain Direct Input” or
“Setting Gain Input 1” respectively is displayed on the 1
st line of the display.
The 2 nd line of the display displays Gain as absolute dB value with four options available for the selected type. The
default setting is for MM/MC Hi is 48dB and for MC Lo it is 54dB.
Use the front panel / buttons (F2) or on the remote control (RC7) to adjust gain downwards or upwards. You ou
can step through several levels of gain by repeatedly pressing the appropriate button. If the gain level is left unchanged,
after several seconds, the system will use this as the new gain level. After each change of gain, the PH-77 will mute for
10 seconds to allow the gain circuit to settle into the new configuration.
Below is the recommended gain settings for a rated cartridge output@5cm/s:
Cartridge Output ~13mV ~6mV ~3mV ~1.5mV ~0.8mV ~0.4mV ~0.2mV ~0.1mV
PH-77 Gain 30dB 36dB 42dB 48dB 54dB 60dB 66dB 72dB
Step 2: Gain