DRAKE L-4B - General Specifications

gENERAL SPECIFICATIONS
FREQUENCY
COVERAGE - Ham bands 80 through 10 meters. All frequencies 3.5 to
30 MHz may be covered with some alteration of input circuit.
PlATE INPUT - 2000 watts PEP - SSB, 1000 watts OC on CW, AM and RTrY.
DRIVE REQUIREMENTS - 100 watts PEP - SSB, 7S watts ~W, AM and RTTY.
INPUT IMPEDANCE ... 50 ohms.
OUTPUT IMPEDANCE - Adjustable pi-network matches 50 ohm Une with SWR not to
exoeed 2:1.
INTERMODUIATION DISTORTION PRODUCTS - In excess of -33 DB
WATTMETER ACCURACY'" 300 watts forward and reflected, .±. (5% of reading
+ 3 watts). 3000 watts forward, ± (5% of reading + 30 watts).
POWER REQUIREMENTS - 230 volts 50 - 60 cycles 15 amperes, or 115 volts 50 -
60 cycles 30 amperes.
DIMENSIONS - Amplifier 13-1S/16'· W x 7-1/S" H x 14-5/16" OJ
Power Supply 6-3/4· W x 7-7/8" H x II'· D.
WEIGHT ... Amplifier 32 Ibs; Power Supply 43 lbs.
TUBE COMPLEMENT - Two 3-S00Z or Two 8802/3-S00Z or Two 8163 or Two 3-400Z.
FRONT PANEL CONTROLS
ON-OFF ... Rocker SWitch
SSB-CW/l'UNE - Rocker SWitch changes plate voltage for different modes of oper-
ation.
BA.ND - Switch selects desired ham bands (See Frequency Coverage) •
PIATE and LOAD ... Tuning adjust pi*-network capacitors in tank circuit for proper
resonance and loading on all bands.
METER - Switch selects monitoring either grid current. plate voltage, forward or
reflected RF power on the lower meter.
AGe/STANDBY PUSH ... Transmitting AGe threshold adjustment and push-pull switch
that allows the L-48 to remain on while operating with the exciter only.
RFAR JACKS - Power (connects L-4B to power supply), high voltage, VOX (for tum-
ing on L-48 with exciter VOX contacts), transmitting AGe (for connecting trans-
mitting AGe to exciter), RF input (for connecting to exciter RF output), RF output
(for connecting L-4B to an antenna) •
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