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 - CW CRYSTAL FILTER - p/n 293-0928-0
COLLINS 51S-1 - CW CRYSTAL FILTER - p/n 293-0928-0
Ends in 14 Hours 40 Minutes 45 Seconds
Current price: $119.99 (0 bids)
POWER CORD FOR COLLINS 51S-1
POWER CORD FOR COLLINS 51S-1
Ends in 20 Hours 29 Minutes 27 Seconds
Current price: $32.95 (179 bids)
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - p/n 522-3
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - p/n 522-3
Ends in 1 Days 14 Hours 58 Minutes 43 Seconds
Current price: $244.99 (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 1 Days 15 Hours 32 Minutes 58 Seconds
Current price: $4.95 (0 bids)
COLLINS 51S-1 Receiver  Vintage RARE 51S1 Roun Emb
COLLINS 51S-1 Receiver Vintage RARE 51S1 Roun Emb
Ends in 2 Days 2 Hours 8 Minutes 35 Seconds
Current price: $1,671.60 (0 bids)
Collins 51S-1
Collins 51S-1
Ends in 2 Days 17 Hours 34 Minutes 34 Seconds
Current price: $565.00 (18 bids)
(4) Collins 51S-1 HF Ham Radio Receiver - FOR PART
(4) Collins 51S-1 HF Ham Radio Receiver - FOR PART
Ends in 2 Days 23 Hours 6 Minutes 50 Seconds
Current price: $390.00 (0 bids)
COLLINS 51S-1 - CRYSTAL 9 MHz 9000 KHz - Y13 - p/n
COLLINS 51S-1 - CRYSTAL 9 MHz 9000 KHz - Y13 - p/n
Ends in 3 Days 9 Hours 23 Minutes 17 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 10.0 MHz 10000 KHz - Y6 -
COLLINS 51S-1 - CRYSTAL 10.0 MHz 10000 KHz - Y6 -
Ends in 3 Days 9 Hours 31 Minutes 34 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 14 MHz 14000 KHz - Y10 and
COLLINS 51S-1 - CRYSTAL 14 MHz 14000 KHz - Y10 and
Ends in 3 Days 9 Hours 48 Minutes 6 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 12 MHz 12000 KHz - Y8 - p/
COLLINS 51S-1 - CRYSTAL 12 MHz 12000 KHz - Y8 - p/
Ends in 3 Days 10 Hours 1 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
Ends in 3 Days 10 Hours 8 Minutes 49 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 9.500 MHz 9500 KHz - Y4 -
COLLINS 51S-1 - CRYSTAL 9.500 MHz 9500 KHz - Y4 -
Ends in 3 Days 10 Hours 18 Minutes 23 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1 - CRYSTAL 11.000 MHz 11000 KHz - Y7
COLLINS 51S-1 - CRYSTAL 11.000 MHz 11000 KHz - Y7
Ends in 3 Days 10 Hours 26 Minutes 1 Seconds
Current price: $24.99 (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 3 Days 11 Hours 8 Minutes 39 Seconds
Current price: $34.99 (0 bids)
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
Ends in 3 Days 17 Hours 20 Minutes 21 Seconds
Current price: $39.99 (1 bid)
COLLINS 51S-1 - LAMPHOLDER - p/n 262-1210-000 - XD
COLLINS 51S-1 - LAMPHOLDER - p/n 262-1210-000 - XD
Ends in 4 Days 17 Hours 1 Minutes 19 Seconds
Current price: $14.99 (0 bids)
COLLINS 51S-1  front pilot LED lamps (2 pcs.).
COLLINS 51S-1 front pilot LED lamps (2 pcs.).
Ends in 4 Days 17 Hours 19 Minutes 12 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 17 Hours 20 Minutes 42 Seconds
Current price: $15.99 (0 bids)
Collins 51S-1 Instruction manual - Premium Card St
Collins 51S-1 Instruction manual - Premium Card St
Ends in 5 Days 1 Hours 1 Minutes 27 Seconds
Current price: $29.95 (6 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 6 Days 19 Hours 1 Minutes 27 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
COLLINS 51S-1 - AF GAIN - LINE AF GAIN - KNOB - p/
Ends in 6 Days 19 Hours 15 Minutes 23 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 8 Days 19 Hours 45 Minutes 43 Seconds
Current price: $44.99 (16 bids)
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Wire Pro 86CP9 Amphenol 9 Pin octal style plug phe
Ends in 9 Days 15 Hours 42 Minutes 10 Seconds
Current price: $12.50 (0 bids)
Collins 51S-1 NEW Capacitor Replacement Kit
Collins 51S-1 NEW Capacitor Replacement Kit
Ends in 10 Days 18 Hours 24 Minutes 18 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 10 Days 23 Hours 39 Minutes 32 Seconds
Current price: $8.99 (123 bids)
COLLINS 51S-1 RECEIVER  ROUND EMBLEM  DIAL LOCK  E
COLLINS 51S-1 RECEIVER ROUND EMBLEM DIAL LOCK E
Ends in 12 Days 9 Hours 20 Minutes 24 Seconds
Current price: $1,799.99 (0 bids)
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Ends in 12 Days 18 Hours 46 Minutes 6 Seconds
Current price: $27.99 (6 bids)
Collins 51S-1 Receiver WHITE Honeywell Meter face
Collins 51S-1 Receiver WHITE Honeywell Meter face
Ends in 12 Days 18 Hours 50 Minutes 26 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 13 Days 11 Hours 9 Minutes 56 Seconds
Current price: $79.99 (0 bids)
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
COLLINS 51S-1 - SHOCK MOUNT SHOCKMOUNT SHOCK ABSOR
Ends in 13 Days 15 Hours 16 Minutes 30 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 14 Days 18 Hours 33 Minutes 9 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 17 Days 6 Hours 5 Minutes 28 Seconds
Current price: $39.99 (0 bids)
COLLINS 51S-1 parts : lot of 5
COLLINS 51S-1 parts : lot of 5
Ends in 17 Days 21 Hours 16 Minutes 7 Seconds
Current price: $450.00 (0 bids)
TUBE  KIT  FOR  COLLINS  51S-1
TUBE KIT FOR COLLINS 51S-1
Ends in 18 Days 13 Hours 11 Minutes 53 Seconds
Current price: $109.00 (9 bids)
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - collins p
COLLINS 51S-1 - SHOCKMOUNT BASE 350D-5 - collins p
Ends in 19 Days 9 Hours 10 Minutes
Current price: $99.00 (0 bids)
COLLINS 51S-1 - CAPACITOR PCB - RF TURRET ASSEMBLY
COLLINS 51S-1 - CAPACITOR PCB - RF TURRET ASSEMBLY
Ends in 19 Days 9 Hours 40 Minutes 41 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 19 Days 9 Hours 41 Minutes 37 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 20 Days 10 Hours 1 Minutes 52 Seconds
Current price: $34.99 (18 bids)
COLLINS 51S-1 - ANTENNA JACK - RCA - p/n 360-0195-
COLLINS 51S-1 - ANTENNA JACK - RCA - p/n 360-0195-
Ends in 21 Days 6 Hours 55 Minutes 49 Seconds
Current price: $14.99 (4 bids)

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