Collins 51J

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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 51J EBay Bargains!

TUBE  KIT  FOR  COLLINS  51J-4
TUBE KIT FOR COLLINS 51J-4
Ends in 7 Hours 12 Minutes 9 Seconds
Current price: $119.00 (63 bids)
* 10 BRISTOL WRENCH SET FOR COLLINS 51J RECEIVER K
* 10 BRISTOL WRENCH SET FOR COLLINS 51J RECEIVER K
Ends in 1 Days 13 Hours 4 Minutes 26 Seconds
Current price: $20.00 (23 bids)
10 PC. BRISTOL WRENCH SET FOR COLLINS 51J  SERIES
10 PC. BRISTOL WRENCH SET FOR COLLINS 51J SERIES
Ends in 1 Days 13 Hours 33 Minutes 53 Seconds
Current price: $20.00 (12 bids)
SSB Adapter for Collins 51J-3/4, R-388(A)
SSB Adapter for Collins 51J-3/4, R-388(A)
Ends in 4 Days 8 Hours 42 Minutes 1 Seconds
Current price: $64.04 (0 bids)
COLLINS  51J-3 / R-388   TUBE  KIT
COLLINS 51J-3 / R-388 TUBE KIT
Ends in 6 Days 1 Hours 49 Minutes 40 Seconds
Current price: $115.00 (34 bids)
COLLINS 51J-2 MANUAL, 30 BANDS, .5 TO 30.5
COLLINS 51J-2 MANUAL, 30 BANDS, .5 TO 30.5
Ends in 7 Days 14 Hours 23 Minutes 57 Seconds
Current price: $19.95 (2 bids)
Collins 51J-4 Entire Tube Set 5U4 5654 12AX7 12AU7
Collins 51J-4 Entire Tube Set 5U4 5654 12AX7 12AU7
Ends in 8 Days 9 Hours 8 Minutes 49 Seconds
Current price: $106.38 (0 bids)
Manual Reprint For Collins 51J-3  R-388 Receiver
Manual Reprint For Collins 51J-3 R-388 Receiver
Ends in 9 Days 5 Minutes 32 Seconds
Current price: $14.49 (5 bids)
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
Ends in 11 Days 22 Hours 8 Minutes 24 Seconds
Current price: $199.99 (0 bids)
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
Ends in 11 Days 22 Hours 10 Minutes 12 Seconds
Current price: $199.99 (0 bids)
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
Ends in 11 Days 22 Hours 12 Minutes 10 Seconds
Current price: $199.99 (0 bids)
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
COLLINS 51J-4 - BANDPASS MECHANICAL FILTER IF 500
Ends in 11 Days 22 Hours 14 Minutes 16 Seconds
Current price: $199.99 (0 bids)
Collins 51J-3/R388 General Coverage Receiver
Collins 51J-3/R388 General Coverage Receiver
Ends in 14 Days 1 Hours 8 Minutes 9 Seconds
Current price: $295.00 (0 bids)
COLLINS 51J-3 MANUAL, 30 BANDS, .5 TO 30.5
COLLINS 51J-3 MANUAL, 30 BANDS, .5 TO 30.5
Ends in 20 Days 4 Hours 22 Minutes 9 Seconds
Current price: $19.95 (4 bids)
 Collins 51J-4 Receiver 51J4 Operation & Repai
Collins 51J-4 Receiver 51J4 Operation & Repai
Ends in 21 Days 11 Hours 21 Minutes 22 Seconds
Current price: $15.95 (0 bids)
COLLINS 51J-4 RECEIVER  OPERATING & SERVICE MA
COLLINS 51J-4 RECEIVER OPERATING & SERVICE MA
Ends in 21 Days 12 Hours 15 Minutes 9 Seconds
Current price: $10.00 (1 bid)
* 10 PIECE BRISTOL WRENCH SET FOR COLLINS 51J RECE
* 10 PIECE BRISTOL WRENCH SET FOR COLLINS 51J RECE
Ends in 22 Days 13 Hours 51 Minutes 6 Seconds
Current price: $20.00 (48 bids)
Collins 51J-4 Instruction Manual: W/ 11’X17&
Collins 51J-4 Instruction Manual: W/ 11’X17&
Ends in 25 Days 7 Hours 25 Minutes 39 Seconds
Current price: $18.95 (6 bids)

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