Randall RT503H Operation Manual

Summary of RT503H

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    Congratulations on the purchase of your new randall amplifier! We at randall amplification appreciate that you chose our brand of guitar instrument amplifiers and wish you years of great tone and enjoyable playing time with our proven rt series. Please review the safety instructions below and be awa...

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    1/4” instrument input (1) - plug your guitar in here. Channel selector (2) - this button toggles thru the three channel options clean channel is clean but can be distorted by turning up the gain (3) to get a vintage tube overdrive that is great for blues and classic rock’n’roll. The bright switch (4...

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    31. Tube bias system what is bias? Simply put, it is a circuit inside the power amplifier section that controls the “idle current ” that flows through the power tubes. Much like the idle speed on a car. There is an optimum setting where the engine (amplifier) is running (idling) (hot) enough to keep...