Collins KWM-2

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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 KWM-2 EBay Bargains!

COMPLETE  TUBE  KIT  FOR  COLLINS  KWM-2
COMPLETE TUBE KIT FOR COLLINS KWM-2
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RCAP-MJ conversion connector 1 piece for Collins K
RCAP-MJ conversion connector 1 piece for Collins K
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Collins KWM-2 Notes Parts List Schematics
Collins KWM-2 Notes Parts List Schematics
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Collins KWM-2 Amateur Radio Transceiver and Collin
Collins KWM-2 Amateur Radio Transceiver and Collin
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Collins KWM-2A SSB Transceiver w/PM-2 PSU, Crystal
Collins KWM-2A SSB Transceiver w/PM-2 PSU, Crystal
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Rockwell Collins KWM-2A Signature Series  Amateur
Rockwell Collins KWM-2A Signature Series Amateur
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Current price: $29.75 (3 bids)
Cooling Fan for Collins KWM-2 and S-line Transmitt
Cooling Fan for Collins KWM-2 and S-line Transmitt
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6AZ8 Vacuum Tube New Mil Philips/ECG for Collins K
6AZ8 Vacuum Tube New Mil Philips/ECG for Collins K
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Collectors Grade Collins KWM-2
Collectors Grade Collins KWM-2
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COLLINS KWM2 FOR PARTS OR RESTORATION
COLLINS KWM2 FOR PARTS OR RESTORATION
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Collins KWM-2A Round Emblem Ham Radio Transceiver
Collins KWM-2A Round Emblem Ham Radio Transceiver
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Collins KWM-2A Winged Emblem Ham Radio Transceiver
Collins KWM-2A Winged Emblem Ham Radio Transceiver
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QST Ham Radio Magazine Print Ad Terrific Trade-In
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Spun Aluminum Knob inlays for Collins KWM-2 or KWM
Spun Aluminum Knob inlays for Collins KWM-2 or KWM
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Collins KWM-2 Signature Series Ham Radio Amateur R
Collins KWM-2 Signature Series Ham Radio Amateur R
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  TUBE  KIT  FOR  COLLINS  KWM-2  LESS FINALS (2-6
TUBE KIT FOR COLLINS KWM-2 LESS FINALS (2-6
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Collins KWM-2A Ham Radio Transceiver w/ Teflon Wir
Collins KWM-2A Ham Radio Transceiver w/ Teflon Wir
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Collins KWM-2A Round Emblem Ham Radio Transceiver
Collins KWM-2A Round Emblem Ham Radio Transceiver
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Collins KWM-2A Classic Ham Radio HF Transceiver -
Collins KWM-2A Classic Ham Radio HF Transceiver -
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Cooling Fan K5GNA for Collins KWM-2A and Others
Cooling Fan K5GNA for Collins KWM-2A and Others
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COLLINS KWM-2A DFD  Digital Frequency FND Display
COLLINS KWM-2A DFD Digital Frequency FND Display
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Collins KWM-2 and KWM-2A Instruction Book 9th Edit
Collins KWM-2 and KWM-2A Instruction Book 9th Edit
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1964 Photo QSL: G3NMS/A  1st US Citizen QSO from U
1964 Photo QSL: G3NMS/A 1st US Citizen QSO from U
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CQ Ham Radio Magazine Print Ad ’Barefoot to
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QST Ham Radio Magazine Print Ad ELECTRONIC WHOLESA
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QST Ham Radio Magazine Print Ad Collins KWM-2 Mobi
QST Ham Radio Magazine Print Ad Collins KWM-2 Mobi
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Complete Collins KWM-2 / 30L-1 Station
Complete Collins KWM-2 / 30L-1 Station
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CQ Ham Radio Magazine Print Ad for HARVEY RADIO Co
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Collins KWM-2 KWM-2A F455Y21 526-9337-00 Filter As
Collins KWM-2 KWM-2A F455Y21 526-9337-00 Filter As
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NOS Collins KWM-2 KWM-2A F455Y21 526-9337-00 Mecha
NOS Collins KWM-2 KWM-2A F455Y21 526-9337-00 Mecha
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Original Collins KWM-2 KWM-2A TRX Manual Instructi
Original Collins KWM-2 KWM-2A TRX Manual Instructi
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Collins KWM-2A Circle Signature Series Amateur Rad
Collins KWM-2A Circle Signature Series Amateur Rad
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ORIGINAL COLLINS KWM-2 KWM-2A TRANSCEIVER INSTRUCT
ORIGINAL COLLINS KWM-2 KWM-2A TRANSCEIVER INSTRUCT
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COLLINS KWM-2 Complete Primo Tube Set 6146/A (2)+6
COLLINS KWM-2 Complete Primo Tube Set 6146/A (2)+6
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QST Ham Radio Magazine Print Ad COLLINS KWM-2 Chri
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QST Ham Radio Magazine Print Ad CALL ’ACK&rs
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BUDWIG TF6T-T 8PC COLLINS KWM2 S-LINE RADIO BLACK
BUDWIG TF6T-T 8PC COLLINS KWM2 S-LINE RADIO BLACK
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Collins KWM-2A Plug-in relays K2 and K4 Unused ite
Collins KWM-2A Plug-in relays K2 and K4 Unused ite
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Collins KWM-2 S-Line Frequency Tuning Dial NOS
Collins KWM-2 S-Line Frequency Tuning Dial NOS
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Collins KWM-2 & KWM-2A  Full Knob Inlay set of
Collins KWM-2 & KWM-2A Full Knob Inlay set of
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