Swan 400 User Manual

SWAN 400

bands, or with the Model 406 Frequency Control Unit which only provides coverage of the American phone bands 80 through 15 meters and two 200 Kc portions of

AM 125 watts DC input all bands

AUDIO OUTPUT RESPONSE:

Audio output through built in speaker approx. 3 watts to 3.2 ohm load. Response essentially flat 300 to 3000 cps on both receive and transmit.

THE RIG....

The Swan Model 400 Single Sideband Transceiver, introduced in the spring of 1964, together with its accessories and optional equipment, was designed to be used
in either CW or SSB modes on all portions of the 80, 40, 20, 15, and 10 meter amateur radio bands. Operation on AM (single sideband with carrier) is possible by
zero beating the receiving signal.
The Swan 400 generates the single sideband signal by means of a crystal lattice filter, and the transceiver operation automatically tunes the transmitter to the receiver
frequency. Provisions are included in the transceiver for operation on either upper or lower sideband, and provisions for complete band coverage are included within
the basic transceiver.
Basic circuitry of the single conversion design has been proven in thousands of hours of operation of the very popular Swan 100 and 240 series of transceiver.
Mechanical, electrical, and thermal stability (the VFO is outboard) are high, and all oscillators are voltage regulated and temperature compensated. Push-to-talk
operation is possible in all installations, and operation with a two-contact microphone is possible by use of the Function switch or the VX-1 VOX accessory. The
basic transceiver was designed for use with either the Model 420 Frequency Control Unit (VFO), which provides full coverage of all portions of the stated amateur

the 10 meter band. With a suitable power supply, operation may be fixed, portable, or mobile.
Power input on all bands is a rated 400 watts PEP on single sideband, and 320 watts DC input on CW. The basic transceiver includes automatic gain control (AGC),
automatic limiting control (ALC), selectable sideband, grid-block keying, calibrator, and built in speaker.

SPECIFICATIONS....

FREQUENCY RANGES:

Model 420 VFO - This unit has 20 selectable ranges, with each band covering the following frequencies.

3.4 - 4.0 mc., 7.0 - 7.4 mc., 14.0 - 15.0 mc., 21.0 - 21.6 mc., 28.0 - 29.8 mc..
Model 406 Mobile VFO - American phone band coverage of the 80, 40, 20, and 15 meter bands, with two 200 kc segments of the 10 meter band as follows;

3.8 - 4.0 mc., 7.1 - 7.3 mc., 14.15 - 14.35 mc., 21.25 - 21.45 mc., 28.5 - 28.7 mc., 28.7 - 29.9 mc.

POWER INPUT:

SSB 400 watts PEP on all bands
CW 320 watts DC input

DISTORTION:

Distortion products down at least 30 db.

UNWANTED SIDEBAND SUPPRESSION:

Unwanted sideband down at least 40 db.

CARRIER SUPPRESSION:

Carrier suppression down at least 50 db.

RECEIVER SENSITIVITY:

Less than 0.5 microvolt at 50 ohms impedance for signal-plus-noise ratio of 10 db.

METERING:

PA cathode current, 0-800 ma on transmit, S-meter 0-70 over S9 on receive.

FRONT PANEL CONTROLS:

Function Switch, Sideband Selector, Phone - CW, AF Gain, Bandswitch, Mic. Gain, Carrier Balance, PA Plate Tune, PA Grid Tune, PA Load Coarse, PA Load Fine,
VOX - PTT.

Page 1

SWAN 400

REAR PANEL CONTROLS AND CONNECTIONS:

Bias Potentiometer, Grid-Block CW key jack, Jones plug power connector, VOX unit connector, SO239 antenna connector, S-Meter zero, SPDT relay connector.

FREQUENCY CONTROL UNIT CONTROLS:

Bandswitch, Main Tuning, RF Gain. The 400 was the first Swan rig to have the dual rate VFO knob, with ratios of 6:1 on the outer ring, and 36:1 on the inner knob.

VACUUM TUBE COMPLIMENT:

V1 - 6EW6 VFO amplifier
V2 - 12BE6 transmitter mixer
V3 - 6GK6 driver
V4 - 6HF5 PA
V5 - 6HF5 PA
V6 - 12BZ6 receiver RF amplifier
V7 - 12BE6 receiver mixer
V8 - 6EW6 first IF amp
V9 - 12BA6 second IF amo
V10- 12AX7 product detector / receiver audio
V11- 6BN8 AGC amplifier / detector
V12- 6GK6 audio output
V13- 12BA6 100 kc crystal calibrator
V14- 7360 balanced modulater
V15- 12BA6 carrier oscillator
V16- 12AX7 mic. amplifier / transmit audio
V17- 0A2 voltage regulator

POWER REQUIREMENTS:
Filiments - 12.6 volts, 5.5 amps ac or dc
Relay - 12 volts dc, 250 ma
Bias - -110 volts dc, 100 ma
Medium Voltage - 275 volts dc, 150 ma transmit
High Voltage - 800 volts dc, 500 ma

WEIGHT AND SIZE:

Model 400 transceiver, 17 lbs, 5.5"H x 13"W x 11"D.
Model 420 VFO, 9 lbs, 5.5"H x 6.5"W x 11"D.
Model 406 VFO, 3 lbs, 3"H x 4.75"W x 5"D.

SALES INFO:

Intrduced in the spring of 1964
Model 400 transceiver $375.00 US
Model 420 vfo $120.00 US
Model 406 vfo $65.00 US
Model 117B power supply $75.00 US
Model 512 power supply (12 VDC) $145.00 US
Model VX-1 plug in vox unit $25.00 US

Page 2