Collins 51S

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Art Collins founded Collins Radio Company in 1933 in Cedar Rapids, Iowa for the purpose of designing and producing both shortwave and AM broadcast radio equipment and equipment.

The company introduced their first amateur radio receiver, the 75A-1 around 1947. This unit achieved excellent stability due to high build quality and the use of a permeability tuned oscillator (PTO) in its second conversion stage. It was one of the few dual-conversion superheterodyne receivers manufactured at that time and was designed to receive only the amateur bands.

The 75A amateur line was continued throughout the early 50s, ending with the 75A-4, released in 1955. The Collins mechanical filter was introduced in the 75A-3, and the 75A-4 was one of the first receivers marketed specifically as a single sideband receiver.

In 1958 the 75A series was replaced with the much smaller 75S series, part of the S/Line. These top-end receivers featured mechanical filters, excellent stability and very accurate frequency readout.

With the introduction of the S/Line in 1958, Collins moved to an integrated equipment system, making them the first manufacturer to take this approach. Collins was also introduced a compact HF transceiver, the KWM-1, the year before. These two innovations put Collins ahead of its competition and set the stage for other amateur radio equipment makers and the next generation of HF radios.

In 1978, the S/Line came to an end after a two decade run. The KWM-380 transceiver was introduced the next year – innovative in its use of transistors and digital technology, and its styling. It was Collins’ final entry in the amateur radio market until it was discontinued in the mid-1980s.

The Collins Radio Company was purchased by Rockwell International in 1973. In 2001 the avionics division of Rockwell International was spun off to form the current Rockwell Collins, Inc., retaining its name. Rockwell Collins serves the defense and commercial avionics industries and no longer markets receivers to the public. The company today employs over 19,000 people.

More information on Collins Radio:
Wikipedia reference on Collins Radio
Collins Collectors Association
Virtual Collins Radio Museum

Collins 51S EBay Bargains!

COLLINS 51S-1 - CRYSTAL 9 MHz 9000 KHz - Y13 - p/n
COLLINS 51S-1 - CRYSTAL 9 MHz 9000 KHz - Y13 - p/n
Ends in 23 Hours 16 Minutes 30 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 10.0 MHz 10000 KHz - Y6 -
COLLINS 51S-1 - CRYSTAL 10.0 MHz 10000 KHz - Y6 -
Ends in 23 Hours 24 Minutes 47 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 14 MHz 14000 KHz - Y10 and
COLLINS 51S-1 - CRYSTAL 14 MHz 14000 KHz - Y10 and
Ends in 23 Hours 41 Minutes 19 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 12 MHz 12000 KHz - Y8 - p/
COLLINS 51S-1 - CRYSTAL 12 MHz 12000 KHz - Y8 - p/
Ends in 23 Hours 53 Minutes 14 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
Ends in 1 Days 2 Minutes 2 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 9.500 MHz 9500 KHz - Y4 -
COLLINS 51S-1 - CRYSTAL 9.500 MHz 9500 KHz - Y4 -
Ends in 1 Days 11 Minutes 36 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 11.000 MHz 11000 KHz - Y7
COLLINS 51S-1 - CRYSTAL 11.000 MHz 11000 KHz - Y7
Ends in 1 Days 19 Minutes 14 Seconds
Current price: $21.24 (0 bids)
COLLINS 51S-1 - CRYSTAL 10.332.5 MHz 10332.50 KHz
COLLINS 51S-1 - CRYSTAL 10.332.5 MHz 10332.50 KHz
Ends in 1 Days 1 Hours 1 Minutes 52 Seconds
Current price: $29.74 (0 bids)
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
Ends in 1 Days 7 Hours 13 Minutes 34 Seconds
Current price: $33.99 (1 bid)
COLLINS 51S-1 - LAMPHOLDER - p/n 262-1210-000 - XD
COLLINS 51S-1 - LAMPHOLDER - p/n 262-1210-000 - XD
Ends in 2 Days 6 Hours 54 Minutes 32 Seconds
Current price: $12.74 (0 bids)
Collins 51S-1 Instruction manual - Premium Card St
Collins 51S-1 Instruction manual - Premium Card St
Ends in 2 Days 14 Hours 54 Minutes 40 Seconds
Current price: $29.95 (7 bids)
COLLINS 51S-1  front pilot LED lamps (2 pcs.).
COLLINS 51S-1 front pilot LED lamps (2 pcs.).
Ends in 4 Days 5 Hours 59 Minutes 22 Seconds
Current price: $14.99 (0 bids)
COLLINS 51S-1  front panel LED lamps blue color (2
COLLINS 51S-1 front panel LED lamps blue color (2
Ends in 4 Days 6 Hours 1 Minutes 49 Seconds
Current price: $15.99 (0 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 4 Days 8 Hours 54 Minutes 40 Seconds
Current price: $33.99 (0 bids)
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
Ends in 4 Days 9 Hours 8 Minutes 36 Seconds
Current price: $42.49 (0 bids)
Collins 51S-1 Signature Series Ham Radio Amateur R
Collins 51S-1 Signature Series Ham Radio Amateur R
Ends in 5 Days 2 Hours 32 Minutes 5 Seconds
Current price: $39.99 (0 bids)
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Ends in 8 Days 6 Hours 6 Minutes 57 Seconds
Current price: $12.50 (0 bids)
TWO (2) #47 6.3 VOLT BULBS for Collins 51S1 / 75S-
TWO (2) #47 6.3 VOLT BULBS for Collins 51S1 / 75S-
Ends in 9 Days 16 Hours 29 Minutes 5 Seconds
Current price: $4.95 (0 bids)
COLLINS 51S-1 RECEIVER  ROUND EMBLEM  DIAL LOCK  E
COLLINS 51S-1 RECEIVER ROUND EMBLEM DIAL LOCK E
Ends in 9 Days 23 Hours 13 Minutes 37 Seconds
Current price: $1,799.99 (0 bids)
COLLINS 51S-1 - FREQUENCY COUNTER ASSEMBLY - p/n 0
COLLINS 51S-1 - FREQUENCY COUNTER ASSEMBLY - p/n 0
Ends in 11 Days 1 Hours 3 Minutes 9 Seconds
Current price: $67.99 (0 bids)
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
Ends in 11 Days 5 Hours 9 Minutes 43 Seconds
Current price: $9.99 (0 bids)
COLLINS 51S-1 - S-line - ROUND EMBLEM - INSIGNIA -
COLLINS 51S-1 - S-line - ROUND EMBLEM - INSIGNIA -
Ends in 11 Days 7 Hours 37 Minutes 12 Seconds
Current price: $79.99 (0 bids)
COLLINS 51S-1 - METER with LAMPHOLDER and BULB - p
COLLINS 51S-1 - METER with LAMPHOLDER and BULB - p
Ends in 11 Days 7 Hours 50 Minutes 13 Seconds
Current price: $149.99 (0 bids)
COLLINS 51S-1 - DETENT - SPROCKET - CHAIN BEAD - S
COLLINS 51S-1 - DETENT - SPROCKET - CHAIN BEAD - S
Ends in 11 Days 9 Hours 45 Minutes 15 Seconds
Current price: $49.99 (0 bids)
COLLINS 51S-1 - METER LEVER SWITCH with KNOB - p/n
COLLINS 51S-1 - METER LEVER SWITCH with KNOB - p/n
Ends in 11 Days 9 Hours 51 Minutes 22 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 - REJECTION TUNING VARIABLE RESISTOR
COLLINS 51S-1 - REJECTION TUNING VARIABLE RESISTOR
Ends in 11 Days 9 Hours 55 Minutes 56 Seconds
Current price: $59.99 (0 bids)
COLLINS 51S-1 - MAIN SWITCH - p/n 259-1336-000
COLLINS 51S-1 - MAIN SWITCH - p/n 259-1336-000
Ends in 11 Days 10 Hours
Current price: $59.99 (0 bids)
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
Ends in 11 Days 10 Hours 3 Minutes 21 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - LIGHT REFLECTOR - LAMP BULB HOLDER
COLLINS 51S-1 - LIGHT REFLECTOR - LAMP BULB HOLDER
Ends in 11 Days 22 Hours 8 Minutes 48 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
Ends in 11 Days 22 Hours 11 Minutes 56 Seconds
Current price: $49.99 (0 bids)
COLLINS 51S-1 32S-3 KWM-2 - MAIN DIAL KNOB - p/n 5
COLLINS 51S-1 32S-3 KWM-2 - MAIN DIAL KNOB - p/n 5
Ends in 11 Days 22 Hours 26 Minutes 39 Seconds
Current price: $129.99 (0 bids)
COLLINS 51S-1 32S-3 KWM-2 S-LINE - PUSH ON KNOB -
COLLINS 51S-1 32S-3 KWM-2 S-LINE - PUSH ON KNOB -
Ends in 11 Days 22 Hours 45 Minutes 7 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 32S-3 KWM-2 S-LINE - PUSH ON KNOB -
COLLINS 51S-1 32S-3 KWM-2 S-LINE - PUSH ON KNOB -
Ends in 11 Days 22 Hours 46 Minutes 16 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 11 Days 22 Hours 49 Minutes 27 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 - DIAL DRIVE- p/n 609-1067-001
COLLINS 51S-1 - DIAL DRIVE- p/n 609-1067-001
Ends in 11 Days 23 Hours 3 Minutes 54 Seconds
Current price: $79.99 (0 bids)
COLLINS 51S-1 - DIAL WINDOW - LENS - p/n 547-2743-
COLLINS 51S-1 - DIAL WINDOW - LENS - p/n 547-2743-
Ends in 11 Days 23 Hours 17 Minutes 15 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 S-line - CABINET FEET - GENUINE
COLLINS 51S-1 S-line - CABINET FEET - GENUINE
Ends in 11 Days 23 Hours 22 Minutes 37 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 KWM2-A S-LINE - DIAL BRAKE - DIAL LO
COLLINS 51S-1 KWM2-A S-LINE - DIAL BRAKE - DIAL LO
Ends in 11 Days 23 Hours 41 Minutes 28 Seconds
Current price: $199.99 (0 bids)
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Ends in 12 Days 9 Hours 53 Minutes 17 Seconds
Current price: $19.95 (0 bids)
COLLINS 51S-1 VECTOR STAND-OFF TERMINAL BOARD 306-
COLLINS 51S-1 VECTOR STAND-OFF TERMINAL BOARD 306-
Ends in 14 Days 19 Hours 58 Minutes 41 Seconds
Current price: $33.99 (0 bids)

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