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TRUMPET MC Phonostage
5
Operation
The Trumpet MC connects as any other phonostage, between cartridge and stereo
receiver (linestage). There is only one set of RCA inputs and outputs.
Make sure turntable ground wire (if it has one) connects to ground lug on rear. Connect
inputs and outputs. Keep chassis away from sources of disruptive noise, such as power
transformers within other equipment. Plug in wall-wart supply.
Unit is powered on by pressing front panel pushbutton. After roughly 40 seconds of
delay, the internal high voltage supplies will turn on. When both LEDs are lit, unit is
ready for use.
Best operation is to run LOADING as high as possible (clockwise) and GAIN as low as
possible (counter-clockwise). MM cartridges will only function properly with LOADING
set to 47k and gain at 45dB.
Not all vacuum tubes are matched for gain. If you experience a channel gain imbalance,
try swapping positions of the 12AX7 tubes around to find a better match.