Collins KWM-2 TransceiverCollins 312B-4 ConsoleSolid State Power Supply 516F-2Collins Cover
$1800.00
This KWM-2 Station is in Like New Condition. Everything in in working order. Receiver is very sharp transmitter has full power out.This is one that should be in a museum. If you are looking for the cleanest KWM-2, this is it. NO SCRATCHES, NO PAINT CHIPS everything is like new. The Power supply has been re-built and converted to solid state. Runs a lot cooler than the 516F-2 and is much more stable.
Close up photos are to show the pristine detail of this rig



Collins KWM-2 Brochure description:
The transceiver is finished in light gray enamel with a simulated leather front panel to match the S/Line.
The first available amateur mobile SSB transceiver was in the Collins KWM series. The KWM-2 continues to lead the field with the following features:
  • FILTER TYPE SSB GENERATION providing unsurpassed performance on both transmit and receive.
  • AUTOMATIC LOAD CONTROL which keeps the signal level adjusted to its rated PEP, resulting in an increase in average talk power.
  • INVERSE RF FEEDBACK which improves linearity and reduces distortion products, giving the cleanest signal on the air.
  • PERMEABILITY-TUNED VARIABLE OSCILLATOR with linearity and stability providing the best frequency calibration available. ONE KC DIVISION on all bands, eliminating frequency searching and allowing you to meet anyone on sked, on any band 80 through 10 meters.
Compactness and efficiency of the KWM-2 are achieved through Collins' advanced design of having all tuned circuits and several tubes function in the dual role of transmitting and receiving. The same oscillators, Mechanical Filter and RF amplifier serve both the transmitter and receiver. CW break- in and monitoring sidetone circuits are built in.
Easily accessible controls on the front panel of the KWM-2 include the OFF-ON-NB-CAL SWITCH, EXCITER TUNING, ZERO SET, PA TUNING, LOADING, MIC GAIN, BAND SWITCH, AF GAIN, RF GAIN, EMISSION and METER SWITCH.
KWM-2 SPECIFICATIONS
FREQUENCY RANGE: 3.4-5.0 and 6.5-30.0 mc; with crystals furnished, bands are as follows:
80 meters - 3.4-3.6 mc, 3.6-3.8 mc and 3.8-4.0 mc.
40 meters - 7.0-7.2 mc and 7.2-7.4 mc.
20 meters - 14.0-14.2 mc and 14.2-14.4 mc.
WWV - 14.8-15.0 mc.
15 meters - 21.0-21.2 mc, 21.2-21.4 mc and 21.4-21.6 mc.
10 meters - 28.5-28.7 mc.
MODE: SSB (either sideband selectable) or CW.
TYPE OF SERVICE: SSB continuous; CW 50% duty cycle.
POWER REQUIREMENTs: 115 v, 50-60 cps; power consumption approximately
235 watts in receive function and approximately 475 watts in transmit.
In mobile operation, 800 vdc required at approximately 175 ma; 275 vdc at 190 ma; a bias supply
adjustable between - 60 v and - 80 v; and 6, 12 or 24 v dc at 11.0, 5.5 or 2.75 amps respectively.
PLATE INPUT: 175 watts PEP on SSB; 160 watts on CW.
POWER OUTPUT: 100 watts PEP (nominal) into 50 ohms.
HARMONIC AND OTHER SPURIOUS RADIATION: Carrier suppression -50 db;
unwanted sideband -50 db; oscillator feed-through and/or mixer
products -50 db. Second harmonic -40 db. Third order distortion -30 db.
NOISE LEVEL: 40 db below single tone carrier.
AMBIENT TEMPERATURE RANGE: 0 -50 C.
AMBIENT HUMIDITY RANGE: 0%-90%.
ALTITUDE: 0-10,000 ft.
SIZE: With feet - 14-3/4" W, 7-3/4" H, 14" D.
WEIGHT: 18 Lbs. 3 oz.
FREQUENCY STABILITY: Within 100 cps after warm-up.
CALIBRATION ACCURACY: 1 kc.
BACKLASH: Not more than 50 cps.
VISUAL DIAL ACCURACY: 200 cps on all bands.
OUTPUT IMPEDANCE: Variable, 50 ohms nominal, capable of matching 2:1 SWR.
KEYING CHARACTERISTICS: Keying is free of chirps and clicks. Break-in CW and
sidetone provided.
AUDIO INPUT: High impedance microphone or phone patch.
AUDIO FREQUENCY RESPONSE: 300-2400 cps + 6 db.
AUDIO COMPRESSION CHARACTERISTICS: ALC operates on IF and RF amplifier
stages and is capable of 10 db compression.
RF FEEDBACK: Approximately 10 db of RF feedback around PA and driver for improved linearity.
RECEIVER SENSITIVITY: 0.5 uv for 10 db signal-to-noise.
RECEIVER SELECTIVITY: 2.1 kc bandwidth at 6 db down; 4.2 kc bandwidth at 60 db down.
RECEIVER SPURIOUS RESPONSE: Image rejection better than 50 db. Internal
spurious below 1 uv equivalent antenna input.
RECEIVER OUTPUT LEVEL: 1.0 watt maximum.
AUTOMATIC GAIN CONTROL: The audio output level does not change more than 20 db as the input
signal is changed from 5 uv to 1 v. Fast attack and slow release provide excellent AVC action on
voice and CW.
VIBRATIONS: 2 g at 10-33 cps.