GENERAL DESCRIPTION
The EICO Model 753 SSB/AM/CW Transceiver incorporates a filter type single sideband trans-
mitter and a single conversion superheterodyne receiver for operation on the 80, 40 and 20 meter
amateur bands.
It
is equally suited for mobile and fixed station use.
In fixed station use, the Model 751 AC Supply/Speaker Console (117 VAC, 60 cps) is required
for its operation. In mobile use, the Model 752 DC Supply (12 VDC , positive or negative ground) is
required. Both supplies have been designed integrally with the 753 and provide the requisite filtering
and regulation. They can not be supplanted by supplies of other manufacture
if
the design capabilities
of the 753 are to be obtained.
FEATURES
SPECIFICATIONS
o Full band coverage on 80, 40 and 20 meters. o Receiver off set tuning (up to ±lOkc) without
altering transmitter frequency. o Built-in VOX. o Panel selected VOX, PTT
&
STANDBY. o High
level dynamic ALC to prevent flat-topping or splatter and permit the use of a linear amplifier. o Auto-
matic carrier level adjustment on CW and AM. o Dual ratio ball drive per mits single knob 6:1 rapid
tuning and 30: 1 fine tuning (over 10 degrees of scale). o Position of hairline adjustable on panel.
o Illuminated S-meter/PA Cathode Current Meter and tuning dial. o Fast attack, slow decay AGC.
o Grid-block break-in CW keying. o Product detector for SSB and CW, triode detector for AM. o TR
relay with auxiliary contacts for use with high power linear amplifier. o Includes mobile mounting
bracket.
ADDITIONAL SPECIFICATIONS
FREQUENCY CO VE RAGE: 3490-4010kc, 6990-7310kc, 13890-14410kc. SSB EMISSIONS: LSB 80
and 40 meters, USB 20 meters. RF POWE R INPUT: 200 watts SSB PE P and CW, lOO watts AM. RF
POWE R OUTPUT: 120 watts SSB PE P and CW, 30 watts AM. OUTPUT PI NETWORK MATCHING
RANGE: 40-80 ohms. SSB GENE RATION: 5. 2 Mc crystal lattice filter; bandwidth 2. 7kc at 6db.
STABILITY: 400 cps af ter warm-up. SUPPRESSION: Carrier-50db; unwanted sideband-40 db.
RECEIVER: Sensitivity luv for lOdb S/N ratio: selectivity 2. 7kc at 6db; audio output over 2 watts
(3. 2 ohms). PANEL CONTROLS
&
CONNECTORS: Tuning, Band Selector , AF Gain, RF Gain, MIC
Gain with calibrator switch at extreme CCW rotation, Hairline Set (capped), Mode (SSB, AM, CW,
Tune), Function (Off , Standby, PTT, VOX), Carrier Balance, Exciter Tune, PA Tune, PA Load,
Receiver Offset Tune, MIC input, phone jack. REAR CONTROLS
&
CONNECTORS: VOX Threshold,
VOX delay, VOX sensitivity, Anti-VOX sensitivity, PA Bias adjust, S-Meter zero adjust, power
socket, external relay, antenna connector , key jack, accessory calibrator socket. ME TERING: PA
cathode on transmit, S-Meter on receive. SIZE (HWD): 5-13/16" x 14-1/4" x 11-1/4". POWE R
REQUIREMENTS: 750 VDC at 300ma, 250 VDC at 170ma, -100 VDC at 5ma, 12. 6 VAC at 3. 8 amps.
INSTALLATION PROCEDURES
COPYRIGHT © 1965 EICO ElECTRONIC INSTRUMENT COMPANY, In<.
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