gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
100518-2207 EST
Following is a report from a mid 1950 research project. There were no SCRs, or high voltage transistors, and only a few limited capability power transistors. No integrated circuits and not too many small signal transistors or diodes.
If you read thru this to some extend you will get an idea of what goes into a research project. The work started in the fall of 1955 and was abruptly terminated during Christmas vacation 1957. The reason being the impending severe recession that was apparent to the large manufacturers, but not the public. Very large inventories of cars were occurring. Cars were going toward the 12 to 1 ratio compounding the ignition system problem. Fuel had lead as an additive and this quickly fouled spark plugs. Typically 10,000 miles.
http://deepblue.lib.umich.edu/bitstream/2027.42/6922/5/bad1074.0001.001.pdf 10.3 MB
You should probably use about 95% magnification.
.
Following is a report from a mid 1950 research project. There were no SCRs, or high voltage transistors, and only a few limited capability power transistors. No integrated circuits and not too many small signal transistors or diodes.
If you read thru this to some extend you will get an idea of what goes into a research project. The work started in the fall of 1955 and was abruptly terminated during Christmas vacation 1957. The reason being the impending severe recession that was apparent to the large manufacturers, but not the public. Very large inventories of cars were occurring. Cars were going toward the 12 to 1 ratio compounding the ignition system problem. Fuel had lead as an additive and this quickly fouled spark plugs. Typically 10,000 miles.
http://deepblue.lib.umich.edu/bitstream/2027.42/6922/5/bad1074.0001.001.pdf 10.3 MB
You should probably use about 95% magnification.
.