575: Difference between revisions
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* A '''high-voltage supply''' around T801, supplying the CRT voltages, +2300 V for the CRT anode and −1700 V for the CRT cathode. | * A '''high-voltage supply''' around T801, supplying the CRT voltages, +2300 V for the CRT anode and −1700 V for the CRT cathode. | ||
:This HV power supply uses a [[6AQ5]] as the HV oscillator tube, and a [[12AU7]] as the feedback/error amplifier. | :This HV power supply uses a [[6AQ5]] as the HV oscillator tube, and a [[12AU7]] as the feedback/error amplifier. | ||
* A '''collector sweep supply''' for | * A '''collector sweep supply''' for the device under test. | ||
: Power from the mains goes through an isolation transformer (T701) and a variac (T702) and is rectified by germanium diodes to produce the collector sweep voltage. | : Power from the mains goes through an isolation transformer (T701) and a variac (T702) and is rectified by germanium diodes to produce the collector sweep voltage. | ||
: The isolation transformer has two pairs of secondary taps, one for high voltage (0 to 200 V) and low current, the other for low voltage (0 to 20 V) and high current. | : The isolation transformer has two pairs of secondary taps, one for high voltage (0 to 200 V) and low current, the other for low voltage (0 to 20 V) and high current. | ||