Nady Systems GTH-100 User Manual
Page 7
7
S P E C I F I C AT I O N S
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.
Power Amp Section
..................................................................................................................................Four EL34 Tubes
Power Output
....................................................................................................100W RMS @ 4
Ω
— 8
Ω
— 16
Ω
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.
.......................................................................................................................................................... 600
Ω
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.