Nady GTH-100 Manual - Page 7

S P E C I F I C AT I O N S Power Amp Section ...Four EL34 Tubes Power Output ...100W RMS @ 4Ω - 8Ω - 16Ω 5% THD Preamp Section ...Three 12AX7A Tubes Input Imp...HI input 200K Ω, LO input 50K Ω Input Sens. (1KHz HI input max clean 800mV, Max distortion 8mV LO input max clean 1.6V, Max distortion 16mV LO Input Attenuation ...9dB Lead Boost Range ...12dB Line Output Imp...600Ω Line Output Level ...1V nominal Reverb Output Imp...1K Reverb Output Level ...1V nominal Power Requirements...120 VAC 60Hz, 230 VAC 50Hz Power Fuse...5x20mm glass tube, slow-blow 4A/250V for 115VAC, 2A/250V for 230VAC High Voltage Fuse ...1A 250V fast blow Dimension ...28" x 10.75" x 9" (71 x 27 x 23cm) Weight ...45 lbs (20kg) TUBE REPLACEMENT Preamp Tubes 12AX7A - No adjustment required Output Tubes EL34 - After replacing output tubes, output tubes bias voltage should be checked with Standby switch set to On, no signal input, and all controls set to minimum. If output tube bias voltage is not correct, amplifier will sound unusually distorted with mushy audio and output tubes may overheat. Normal output tube bias voltage should be -46VDC on Pin 5 of all output tubes. For best results use matched output tubes. Caution: Do to dangerously high voltage, these adjustments should only be made by qualified technician. The specifications above are correct at the time of printing of this manual. For improvement purposes, all specifications for this unit, including design and appearance, are subject to change without prior notice. 7