User`s manual

Wheatfield AudioWheatfield Audio HA-2 User's ManualHA-2 User's Manual
11/19/99 Page 8
Specifications
Note: Specifications listed are typical,
and are derived from measurements on
actual amplifiers. There will be some
variation from one amplifier to the next.
Specifications are subject to change
without notice.
Description
Single-ended, OTL, class-A triode
amplifier
Single voltage amplifier stage, single
cathode follower stage
DC-coupled input; capacitor-coupled
output.
Tube complement
1 - 6SN7GT voltage amplifier (one
section used for each channel)
1 - 6AS7G cathode follower (one section
used for each channel)
1 - 5U4G rectifier
Power supply
Full-wave tube rectifier
Capacitor-input filter with choke, using
electrolytic and polypropylene
capacitors
AC filament supply
Dimensions
13” wide x 8.5” deep x 8” tall
(including tubes)
Power requirements
120VAC 60Hz only
100 Watts
Fuse type
AGC-type, slow-blow, 1.5A 250V
Output Impedance
100 Ohms
Maximum output level
(1kHz, 5% THD)
620 ohm load: 13V RMS / 36V P-P
270 ohm load: 10.5V RMS / 30V P-P
Rated Maximum continuous output
power
(1kHz, 5% THD)
620 ohm load: 270mW
270 ohm load: 400mW
Total Harmonic Distortion
(1kHz, 1V RMS out)
620 ohm load: < TBD %
270 ohm load: < TBD %
Voltage Gain
620 ohm load: 17dB
270 ohm load: 15dB
Frequency Response
(+/- 3dB)
620 ohm load: ~10Hz – 75kHz
270 ohm load: ~15Hz – 75kHz
Ripple and Noise
< 3.5mV RMS