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 receiver used
Collins 51S-1 receiver used
Ends in 8 Hours 9 Minutes 54 Seconds
Current price: $1,999.00 (0 bids)
Collins 51S-1 manual with 13 foldout diagrams/sche
Collins 51S-1 manual with 13 foldout diagrams/sche
Ends in 18 Hours 38 Minutes 50 Seconds
Current price: $23.95 (2 bids)
COLLINS 51S-1 RECEIVER  ROUND EMBLEM  DIAL LOCK  E
COLLINS 51S-1 RECEIVER ROUND EMBLEM DIAL LOCK E
Ends in 1 Days 9 Hours 38 Minutes 11 Seconds
Current price: $1,699.99 (0 bids)
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Ends in 1 Days 11 Hours 5 Minutes 39 Seconds
Current price: $12.50 (0 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 1 Days 14 Hours 10 Minutes 42 Seconds
Current price: $31.99 (0 bids)
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
Ends in 1 Days 14 Hours 24 Minutes 38 Seconds
Current price: $49.99 (0 bids)
Collins 51S-1 NEW Chassis Mounted Replacement Capa
Collins 51S-1 NEW Chassis Mounted Replacement Capa
Ends in 3 Days 14 Hours 54 Minutes 58 Seconds
Current price: $44.99 (16 bids)
Collins 51S-1 NEW Capacitor Replacement Kit
Collins 51S-1 NEW Capacitor Replacement Kit
Ends in 5 Days 13 Hours 33 Minutes 33 Seconds
Current price: $64.99 (80 bids)
Collins 51S-1  Full Set of Inlays for Front Panel
Collins 51S-1 Full Set of Inlays for Front Panel
Ends in 5 Days 18 Hours 48 Minutes 47 Seconds
Current price: $8.99 (122 bids)
COLLINS 51S-1 RECEIVER  ROUND EMBLEM  DIAL LOCK  E
COLLINS 51S-1 RECEIVER ROUND EMBLEM DIAL LOCK E
Ends in 7 Days 4 Hours 29 Minutes 39 Seconds
Current price: $1,699.99 (0 bids)
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Ends in 7 Days 13 Hours 55 Minutes 21 Seconds
Current price: $27.99 (5 bids)
Collins 51S-1 Receiver WHITE Honeywell Meter face
Collins 51S-1 Receiver WHITE Honeywell Meter face
Ends in 7 Days 13 Hours 59 Minutes 41 Seconds
Current price: $27.99 (12 bids)
COLLINS 51S-1 - FREQUENCY COUNTER ASSEMBLY - p/n 0
COLLINS 51S-1 - FREQUENCY COUNTER ASSEMBLY - p/n 0
Ends in 8 Days 6 Hours 19 Minutes 11 Seconds
Current price: $79.99 (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 8 Days 8 Hours 54 Minutes 3 Seconds
Current price: $5.95 (0 bids)
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
Ends in 8 Days 10 Hours 25 Minutes 45 Seconds
Current price: $9.99 (0 bids)
COLLINS 51S-1 Dial PLATE Surround Ham Tube Radio R
COLLINS 51S-1 Dial PLATE Surround Ham Tube Radio R
Ends in 9 Days 13 Hours 42 Minutes 24 Seconds
Current price: $24.95 (1 bid)
COLLINS 51S-1 VECTOR STAND-OFF TERMINAL BOARD 306-
COLLINS 51S-1 VECTOR STAND-OFF TERMINAL BOARD 306-
Ends in 12 Days 1 Hours 14 Minutes 43 Seconds
Current price: $39.99 (0 bids)
TUBE  KIT  FOR  COLLINS  51S-1
TUBE KIT FOR COLLINS 51S-1
Ends in 13 Days 8 Hours 21 Minutes 8 Seconds
Current price: $109.00 (7 bids)
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - collins p
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - collins p
Ends in 14 Days 4 Hours 19 Minutes 15 Seconds
Current price: $99.00 (0 bids)
COLLINS 51S-1 - CAPACITOR PCB - RF TURRET ASSEMBLY
COLLINS 51S-1 - CAPACITOR PCB - RF TURRET ASSEMBLY
Ends in 14 Days 4 Hours 49 Minutes 56 Seconds
Current price: $14.99 (0 bids)
COLLINS 51S-1 - SILVER MICA CAPACITOR PCB - RF TUR
COLLINS 51S-1 - SILVER MICA CAPACITOR PCB - RF TUR
Ends in 14 Days 4 Hours 50 Minutes 52 Seconds
Current price: $14.99 (0 bids)
COLLINS 51S-1 KWM-2 KWM-2A S-line -100KHz CALIBRAT
COLLINS 51S-1 KWM-2 KWM-2A S-line -100KHz CALIBRAT
Ends in 15 Days 5 Hours 11 Minutes 7 Seconds
Current price: $34.99 (18 bids)
Collins 51S-1 spare tubes set
Collins 51S-1 spare tubes set
Ends in 15 Days 13 Hours 12 Minutes 48 Seconds
Current price: $59.95 (0 bids)
COLLINS 51S-1 - ANTENNA JACK - RCA - p/n 360-0195-
COLLINS 51S-1 - ANTENNA JACK - RCA - p/n 360-0195-
Ends in 16 Days 2 Hours 5 Minutes 4 Seconds
Current price: $14.99 (4 bids)
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Ends in 16 Days 3 Hours 45 Minutes 35 Seconds
Current price: $19.95 (0 bids)
Collins 51S-1  Coupling Coil- RF #2
Collins 51S-1 Coupling Coil- RF #2
Ends in 16 Days 17 Hours 4 Minutes 3 Seconds
Current price: $30.00 (0 bids)
Collins 51S-1  Coupling Coil- RF #3
Collins 51S-1 Coupling Coil- RF #3
Ends in 16 Days 17 Hours 4 Minutes 26 Seconds
Current price: $30.00 (0 bids)
Collins 51S-1  Coupling Coil- RF Plastic Support
Collins 51S-1 Coupling Coil- RF Plastic Support
Ends in 16 Days 17 Hours 4 Minutes 56 Seconds
Current price: $49.00 (0 bids)
Collins 51S-1  Coupling Coil- RF Turret Assembly #
Collins 51S-1 Coupling Coil- RF Turret Assembly #
Ends in 16 Days 17 Hours 5 Minutes 11 Seconds
Current price: $30.00 (0 bids)
COLLINS 51S-1  Dial Scale - p/n 547-2559-002
COLLINS 51S-1 Dial Scale - p/n 547-2559-002
Ends in 16 Days 17 Hours 5 Minutes 41 Seconds
Current price: $95.00 (0 bids)
COLLINS 51S-1  Frequency Counter Assembly - p/n 01
COLLINS 51S-1 Frequency Counter Assembly - p/n 01
Ends in 16 Days 17 Hours 5 Minutes 49 Seconds
Current price: $69.00 (0 bids)
Collins 51S-1  RF Coil Turret Board Used #1
Collins 51S-1 RF Coil Turret Board Used #1
Ends in 16 Days 17 Hours 6 Minutes 5 Seconds
Current price: $69.00 (0 bids)
Collins 51S-1  RF Coil Turret Board Used #3
Collins 51S-1 RF Coil Turret Board Used #3
Ends in 16 Days 17 Hours 6 Minutes 39 Seconds
Current price: $69.00 (0 bids)
Collins 51S-1  Silver Mica Capacitor PCB - RF TURR
Collins 51S-1 Silver Mica Capacitor PCB - RF TURR
Ends in 16 Days 17 Hours 7 Minutes 15 Seconds
Current price: $30.00 (0 bids)
Collins 51S-1  Silver Mica Capacitor PCB - RF TURR
Collins 51S-1 Silver Mica Capacitor PCB - RF TURR
Ends in 16 Days 17 Hours 7 Minutes 31 Seconds
Current price: $30.00 (0 bids)
COLLINS 51S-1 -Crystal #2
COLLINS 51S-1 -Crystal #2
Ends in 16 Days 17 Hours 8 Minutes 13 Seconds
Current price: $89.00 (0 bids)
COLLINS 51S-1 -Crystal #3
COLLINS 51S-1 -Crystal #3
Ends in 16 Days 17 Hours 8 Minutes 35 Seconds
Current price: $69.00 (0 bids)
Collins 51S-1 DETENT - SPROCKET - p/n 269-2224-000
Collins 51S-1 DETENT - SPROCKET - p/n 269-2224-000
Ends in 16 Days 17 Hours 8 Minutes 43 Seconds
Current price: $29.00 (0 bids)
Collins 51S-1 Gear Sector drive part  p/n 547-2607
Collins 51S-1 Gear Sector drive part p/n 547-2607
Ends in 16 Days 17 Hours 9 Minutes 22 Seconds
Current price: $14.00 (0 bids)
Collins 51S-1 Internal Plastic Cable Parts
Collins 51S-1 Internal Plastic Cable Parts
Ends in 16 Days 17 Hours 9 Minutes 36 Seconds
Current price: $10.00 (0 bids)

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