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> B&k 707 tube tester cleaned serviced and calibrated
B&k 707 tube tester cleaned serviced and calibrated
B&K 707 tube tester in very good condition.
The B&K 707 is the ultimate professional-grade tester for any user that values his or her time and appreciates convenience. This tester has been calibrated and cleaned. This is what was done: Cleaned all switches and tube sockets with Dexoit contact cleaner; Tested all electrolytic capacitors; Checked all voltages and bridge resistors; Made all service adjustments according to B&K standards; Adjusted operation of short detection and leakage circuitry, grid emission, signal voltage, DC Bias balance and balance control. Cleaned case and front panel. Tester comes with copy of the Instruction Manual and Tube Chart.
Features a clever voltage control circuit that eliminates the need to constantly set the AC line level to insure accurate tests, regardless of line voltage variations. Has sockets for most late model hifi tubes, including compactrons, novar, duodecal, and Nuvistors. Dyna Jet System, where many popular tubes can be tested by just setting two dials. Dual section tubes can be checked with just two pushbuttons. Sensitive grid leakage and shorts read on the meter and on a neon lamp, indicating grid emissions, internal shorts, or gas. Life-test pushbutton, which will indicate on the meter, gives indication of relative good use left in a tube.
