The Collins Ham Radio Receiver 75A1 circa 1949, operational and techical manual. Collins did indeed start with the 75A1 and progressed through the A4 resulting in the" ALine" series of receivers. But as John said, the 75A4 is a whole different beast. It was purposelybuilt as a SSB receiver with AM being a secondary thought (previous to that receivers were AMCW). More about the Collins 75a4 Receiver The Collins 75A4 Receiver was designed expressly for Amateur operation on the seven HF bands 160, 80, 40, 20, 15, 11, and 10 meters.
Manuals for Collins This is the manuals page for Collins. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. Woody's history with the Collins 75a4 Receiver The family that had got me hooked on amateur radio, Ernie Longman (W8DA, sk), and his wife, Marion Longman (K8IZN, sk), had used their Collins 75a4 receiver coupled with a Johnson Viking 500 transmitter for many years.
Harold Collins and his wonderful 75A. Posted on April 17, 2011 by In the manual, Collins called it the first really new amateur receiver since the advent of the superheterodyne circuit. QST published my cover story about a Collins 75A4 homebrewed by a onetime Collins technician.
A 75A4, One Piece at a Time caught the eye Collins Radio Equipment Manuals The CCA is actively digitizing the usertechnical manuals for Collins Radios most popular equipment used for amateur radio purposes.
Our goal is to make these manuals available via online download and, eventually, via CDrom for all CCA members. This DVD contents more than 475 Rockwell Collins Radios PDF instructions, repair manuals files& schematics for using or servicing a lots of products. Perfect for all repairservice shop or professionals users that want to have a lot of Rockwell Collins Operation& service manuals. Discussion of Collins Developed Noise Blankers for the KWM1, 75A4, and 75S1 Amateur Receivers 136B Noise Blanker Manual (200 DPI, PDF, 2.
3MB) 516F2 Power Supply The 75A4 desirability goes by originality, serial# and the# of mechanical filters installed. There is a wide range of value. Post a list and photos if possible of all the stuff.
Collins Collectors Association Technical Data Sheet survey of 100 owners of the 75A4, the lowest serial number front panel in all manuals show the staggered lettering but photos in some of the promotion literature show the" straight" lettering. Rockwell Collins Radio Ultimate Operation& Service Manuals Collection Home; Collins Catalog 1959 Amateur Equipment. Collins Catalog 1959 Aviation Equipment. 75A4 Instruction& Service manual.
75A4 Modification text. 75A4 Schematics. 75A4 Service bulletin# 1.