Henry Radio 3K -Classic Operating And Maintenance Manual page 2

3K Classic and 3K C/ass/c-X Specifications
TYPE AND FUNCTION OF EQUIPMENT: A 2000
watt (3000 watt for X model) PEP input RF linear
amplifier, operating in the 3.5 to 30.0 MHz range.
Designed for amateur, commercial, military, or indus-
trial communications. .
TYPE OF EMISSION: SSB, AM, CW, FM, RTTY.
OUTPUT POWER: 1200 watts PEP nominal (2000
watts PEP nominal for X model).
DRIVE POWER: 60 to 100 watts.
DIMENSIONS:
323f4" High x 16 1 k" Deep x 15" Wide.
SHIPPING WEIGHT: 190 Ibs approximate.
DUTY CYCLE: Continuous duty operation at rated
output.
POWER REQUI REMENTS: 230 VAC, 3 wire, single
phase, 50/60 Hz, 30 amps.
ALC CIRCUIT: Prevents overdrive from high power
exciters and boosts. average talk power.
COOLING: Forced air cooling.
PLATE POWER INPUT: SSB· nominal average input
of 2000 watts PEP with speech. Distortion products are
at least 35 dB down from the sig nal.
FREQUENCY RANGE:
80 meters· 3.5 - 4.0 MHz
40 meters· 7.0 - 7.5 MHz
20 meters - 14.0 - 14.5 MHz
15 meters - 21.0 - 21.5 MHz
10 meters - 28.0 - 30.0 MHz
10 meters available on the X model only. Amplifier
will work on all WARC bands and most frequencies
between 3.5 and 30 MHz.
OUTPUT IMPEDANCE: 52 ohms unbalanced with
SWR not to exceed 2: 1.
TUBE COMPLEMENT: Eimac 8877 ceramic triode.
INPUT IMPEDANCE: 52 ohms, tuned input circuits.
HARMONIC AND SPURIOUS RADIATION: Second
harmonic better than -50 dB. Third order distortion
better than -35 dB at full power output.
NOISE LEVEL: -40 dB or better below one tone
carrier at 1000 watts output.
CONTROLS: Band selector, load control, tune control,
meter switch, standby switch, SSB/CW switch, circuit
breaker, primary fuse, and combined power on/off and
CB switch.
INDICATING DEVICES: Two panel · meter's monitor
plate voltage, plate current, and grid current.
REAR PANEL CONNECTIONS: RF input (BNC type
connector), RF output (UHF type connector), ALC
(RCA type jack), Relay (RCA type jack).
PROTECTIVE DEVICES: High voltage shorting switch,
interlocked panel, air flow switch, primary fuse, primary
circuit breaker, and cathode fuse.
PLATE VOLTAGE: SSB: 2200 - 2400 VDC
(X Model) SSB: 3700 - 3900 VDC
CW: 1700 - 1900 VDC
(X Model) CW: 2700 - 2900 VDC
SPECIAL FEATURES:
Resonant choke input and oil filled capacitor in the
power supply for superb dynamic regulation in the
high voltage supply.
The antenna automatically transfers to the exciter when
the switch is in the standby position or the power is off.
Semiconductor diode rectifiers guaranty long and
reliable life.
Advanced, fast-acting relay circuits for semi-break-in
CWoperation.
DC reiay system for hum free operation.
Pi-L plate circuit with silver plated tank coil guaranty
cleanest most efficient output. .
All aluminum cabinetry with double shielding in the
RF areas guaranty minimum cabinet radiation.
El
RF DECK INTERIOR*
*shown with 10 meter coil
(for export only)
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