Swan SW-140 User Manual

SWAN SW-140 TRANSCEIVER

The Swan SW-140 monoband 40m HF rig shown here is one of the gold
coloured units that were first produced when Herb Johnson began
manufacturing amateur radios. Designed for mobile, portable or fixed station
use. Introductory price, in 1962, was $275.00 US available from your dealer.

TECHNICAL SPECIFICATIONS....

120 Watts PEP from a 6DQ5 PA tube.

TUBE COMPLIMENT

V1- 6DQ5 P.A.
V2- 12BY7 Driver
V3- 12BE6 Trans. Mixer
V4- 12AU6 VFO
V5- 6BA6 Receiver Amplifier
V6- 12BE6 Receiver Mixer

V7- 6BZ6 1st IF
V8- 6BA6 2nd IF
V9- 7360 Balanced Modulator
V10- 6V6GTA AF Output
V11- 12AU7 Microphone Amp
V12- 12AX7 Product Detecter
V13- 6BA6 Carrier Osc.
V14- 0D3 Voltage Regulator
V15- 12AV6 A.F. Osc.

SPECIFICATIONS.

Frequency Range: 7.2 to 7.35 Mhz

High Frequency crystal lattice filter, 3Kc nominal bandwidth. Unwanted
sideband down approximatly 40 db. Carrier suppression approximately 50
db. Receiver selectivity also determined by crystal filter.
Receiver sensitivity less than 1 microvolt at 50 ohms input impedence for
signal-plus-noise / noise ratio of 6 db.
Transmits automatically on receiving frequency.
Mechanical, electrical, and thermal stability exeptionally high. Oscillators
are voltage regulated and temperature compensated.
Controls include: Main tuning, Volume, Carrier Balance, Mic. Gain, Exiter
Tuning, P.A. Tune, P.A. Load, T-R Switch, Supply On-Off Switch, and
Tune Switch.
Microphone Jack (1/4") provides for push-to-talk operation.
Transmits on AM, (single sideband with carrier) with carrier power of
approximatly 25 watts.
Audio response essentially flat from 300 to 3000 cycles on both receive and
transmit.
Meter reads P.A. cathode current, 300 ma. full scale.
Size: 13 1/4" wide, 5 5/8" high, 11" deep.
Weight: 11 pounds.