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 - DETENT - SPROCKET - CHAIN BEAD - S
COLLINS 51S-1 - DETENT - SPROCKET - CHAIN BEAD - S
Ends in 4 Hours 3 Minutes
Current price: $39.99 (0 bids)
COLLINS 51S-1 - REJECTION TUNING VARIABLE RESISTOR
COLLINS 51S-1 - REJECTION TUNING VARIABLE RESISTOR
Ends in 4 Hours 13 Minutes 41 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 4 Hours 17 Minutes 45 Seconds
Current price: $49.99 (0 bids)
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
Ends in 4 Hours 21 Minutes 6 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 Frequency Counter Assembly
COLLINS 51S-1 Frequency Counter Assembly
Ends in 15 Hours 35 Minutes 59 Seconds
Current price: $99.00 (1 bid)
COLLINS 51S-1 - LIGHT REFLECTOR - LAMP BULB HOLDER
COLLINS 51S-1 - LIGHT REFLECTOR - LAMP BULB HOLDER
Ends in 16 Hours 26 Minutes 33 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 16 Hours 29 Minutes 41 Seconds
Current price: $49.99 (0 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 17 Hours 7 Minutes 12 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 17 Hours 21 Minutes 39 Seconds
Current price: $59.99 (0 bids)
COLLINS 51S-1 - CW CRYSTAL FILTER - p/n 293-0928-0
COLLINS 51S-1 - CW CRYSTAL FILTER - p/n 293-0928-0
Ends in 1 Days 22 Hours 51 Minutes 43 Seconds
Current price: $99.99 (0 bids)
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
COLLINS 51S-1 - RF TUNING UNIT COVER TUNING TOOL H
Ends in 2 Days 1 Hours 31 Minutes 19 Seconds
Current price: $39.99 (1 bid)
replacement COLLINS 51S-1 Dial Drive
replacement COLLINS 51S-1 Dial Drive
Ends in 2 Days 1 Hours 46 Minutes 46 Seconds
Current price: $72.00 (0 bids)
COLLINS 51S-1 - CRYSTAL 17.5 MHz 17500 KHz - Y17 -
COLLINS 51S-1 - CRYSTAL 17.5 MHz 17500 KHz - Y17 -
Ends in 2 Days 17 Hours 2 Minutes 26 Seconds
Current price: $44.99 (0 bids)
Collins 51S-1 Round Emblem Signature Series Ham Ra
Collins 51S-1 Round Emblem Signature Series Ham Ra
Ends in 2 Days 21 Hours 59 Minutes 16 Seconds
Current price: $32.50 (5 bids)
COLLINS 51S-1 receiver front pilot LED lamps (2 pc
COLLINS 51S-1 receiver front pilot LED lamps (2 pc
Ends in 3 Days 20 Hours 16 Minutes 45 Seconds
Current price: $15.99 (4 bids)
Canadian Military Made Collins 51S-1 Miniature Rec
Canadian Military Made Collins 51S-1 Miniature Rec
Ends in 3 Days 23 Hours 2 Minutes 50 Seconds
Current price: $8,139.20 (0 bids)
Collins 51S-1 NEW Capacitor Replacement Kit
Collins 51S-1 NEW Capacitor Replacement Kit
Ends in 4 Days 2 Hours 35 Minutes 16 Seconds
Current price: $69.99 (99 bids)
Collins 51S-1  Full Set of Inlays for Front Panel
Collins 51S-1 Full Set of Inlays for Front Panel
Ends in 4 Days 7 Hours 50 Minutes 30 Seconds
Current price: $8.99 (153 bids)
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
COLLINS 51S-1 - CRYSTAL 16 MHz 16000 KHz - Y12 - p
Ends in 4 Days 18 Hours 19 Minutes 47 Seconds
Current price: $24.99 (0 bids)
COLLINS 51S-1  - RF TRANSFORMER T9 T10 - X189-2 -
COLLINS 51S-1 - RF TRANSFORMER T9 T10 - X189-2 -
Ends in 5 Days 3 Hours 43 Minutes 8 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1  - RF TRANSFORMER T9 T10 - X189-2 -
COLLINS 51S-1 - RF TRANSFORMER T9 T10 - X189-2 -
Ends in 5 Days 3 Hours 43 Minutes 49 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - ROTARY SWITCH WAFERS ASSEMBLY - p/
COLLINS 51S-1 - ROTARY SWITCH WAFERS ASSEMBLY - p/
Ends in 5 Days 3 Hours 52 Minutes 38 Seconds
Current price: $49.99 (0 bids)
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
Ends in 5 Days 4 Hours 11 Minutes 2 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
Ends in 5 Days 4 Hours 13 Minutes 9 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
COLLINS 51S-1 - CRYSTAL SOCKET ASSEMBLY - p/n 292-
Ends in 5 Days 4 Hours 15 Minutes 13 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
COLLINS 51S-1 - p/n 360-0136-000 - JACK - PHONES -
Ends in 5 Days 14 Hours 7 Minutes 39 Seconds
Current price: $19.99 (0 bids)
COLLINS 51S-1 - LEFT RAIL - CHASSIS PART - p/n 544
COLLINS 51S-1 - LEFT RAIL - CHASSIS PART - p/n 544
Ends in 5 Days 14 Hours 42 Minutes 12 Seconds
Current price: $14.99 (1 bid)
COLLINS 51S-1 - TERMINAL BOARD - TB1 - p/n 367-734
COLLINS 51S-1 - TERMINAL BOARD - TB1 - p/n 367-734
Ends in 5 Days 15 Hours 23 Minutes 7 Seconds
Current price: $29.99 (1 bid)
COLLINS 51S-1 HF RECEIVER - PLATE ESCUTCHEON p/n 5
COLLINS 51S-1 HF RECEIVER - PLATE ESCUTCHEON p/n 5
Ends in 6 Days 31 Minutes 35 Seconds
Current price: $99.00 (1 bid)
Rockwell Collins 51s-1 rack mount plate
Rockwell Collins 51s-1 rack mount plate
Ends in 6 Days 23 Hours 42 Minutes 9 Seconds
Current price: $40.00 (0 bids)
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Collins 51S-1 Receiver WHITE Bartlett Meter face t
Ends in 7 Days 2 Hours 57 Minutes 4 Seconds
Current price: $17.99 (23 bids)
Collins 51S-1 Receiver WHITE Honeywell Meter face
Collins 51S-1 Receiver WHITE Honeywell Meter face
Ends in 7 Days 3 Hours 1 Minutes 24 Seconds
Current price: $17.99 (36 bids)
Collins 51S-1 Instruction manual - Premium Card St
Collins 51S-1 Instruction manual - Premium Card St
Ends in 7 Days 9 Hours 12 Minutes 25 Seconds
Current price: $30.95 (15 bids)
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
COLLINS 51S-1 HF RECEIVER - DIAL WINDOW - COUNTER
Ends in 8 Days 3 Hours 12 Minutes 25 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 8 Days 3 Hours 26 Minutes 21 Seconds
Current price: $49.99 (0 bids)
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Collins 51S-1 1A 1F 1AF 1B Instruction Manual Repr
Ends in 8 Days 3 Hours 48 Minutes 32 Seconds
Current price: $14.95 (14 bids)
Collins 51S-1  WHITE Bartlett Meter face to Replac
Collins 51S-1 WHITE Bartlett Meter face to Replac
Ends in 8 Days 14 Hours 27 Minutes 16 Seconds
Current price: $14.90 (1 bid)
Collins 51S-1 WHITE Honeywell Meter face to Replac
Collins 51S-1 WHITE Honeywell Meter face to Replac
Ends in 8 Days 14 Hours 32 Minutes
Current price: $14.90 (0 bids)
COLLINS 51S-1 - ALUMINUM FILTER HOLDER ASSEMBLY -
COLLINS 51S-1 - ALUMINUM FILTER HOLDER ASSEMBLY -
Ends in 8 Days 15 Hours 27 Minutes 57 Seconds
Current price: $29.99 (0 bids)
COLLINS 51S-1 LINE AF TRANSFORMER T4 - p/n  667-05
COLLINS 51S-1 LINE AF TRANSFORMER T4 - p/n 667-05
Ends in 8 Days 15 Hours 28 Minutes 9 Seconds
Current price: $49.99 (0 bids)

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