Limit state method of rcc design pdf

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Please forward this error screen to 158. Please forward this error screen limit state method of rcc design pdf 158. Type or paste a DOI name into the text box.

Please forward this error screen to cp-13. Boonton 33A “Admittance Bridge” front panel reminded me of the HP 8410 Vector Network Analyzer. Prior to the 8410 transistors were specified using h or y parameters and these required testing the transistor using either an open or short circuit AC load. As the cutoff frequency of the transistors got higher and higher in the early 1960s these loads resulted in oscillations that were hard to stop, hence the 8410 that uses 50 Ohm terminations on all the test ports. There were a number of accessories for the 8410 specifically aimed at transistor characterization.

I took bunches of microwave transistors to get the characterized for S-Parameters. These were analyzed using software I wrote that would combine the measured S-parameters with common circuit elements including transmission lines. This was run on a time sharing computer in Palo Alto using an ASR-33 teletype in my office connected by an acoustic coupler type modem. Rereading that article in 2010 brought back the memory of attending the local HP introductory meeting to introduce the 8410A. One of the reasons for it’s development was to come up with a better way of characterizing transistors. I wrote a lot of computer code in FORTRAN and Basic to analyze S-Parameters.

Later used an ASR33 Teletype in my office connected to Remote Computing Corp in Palo Alto to do the analysis. The design of microwave transistor amplifiers in terms of getting flat gain over the pass-band was straight forward. The hard part was taming the out of band gain to prevent oscillations. Bob Mouw were made of modules. Each module had an quarter wave resonator as the input coupling element and another quarter wave resonator as the output coupling element. Prior to the HP 8410 microwave device Smith Charts were measured using a slotted line one frequency at a time.