tag:blogger.com,1999:blog-4585442725225382080.post7740381272258297611..comments2023-06-17T06:59:05.555-05:00Comments on Target: Babies in Open.<br> Fire For Effect.: Dry AirComrade Misfithttp://www.blogger.com/profile/15404477636451308763noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4585442725225382080.post-44073791804550211892008-04-16T20:32:00.000-05:002008-04-16T20:32:00.000-05:00Fascinating post EBM! And great comment eck!!Fascinating post EBM! And great comment eck!!PhysioProfhttps://www.blogger.com/profile/11046093902090839375noreply@blogger.comtag:blogger.com,1999:blog-4585442725225382080.post-37029726932350641412008-04-16T18:44:00.000-05:002008-04-16T18:44:00.000-05:00At typical frequencies cables are very inefficient...At typical frequencies cables are very inefficient as they absorb great gobs of signal. for example A common radio cable<BR/>called RG213 (.4" diameter ance very widely used) at 400mhz will absorb 50% of the transmitter power in 100 foot length<BR/>and at 5,000w it will melt! So normal Coaxial cable for those power levels <BR/>(typically 10,000 or as much as 500,00 watts peak) would both be very large<BR/>and very inefficient. Wave guides<BR/>are RF water pipes and when properly maintained have extremely low losses which means no heating for the transmitted pulse and the weak return echo is not attenutated significantly.<BR/>To assis in maintaining it's performance it's very common to have the inside of the waveguide plated (a thick coating too) with silver because of it's conductive properties both clean and with tarnish. But like everything else shipboard water especially salt water is an aggressive enemy.<BR/><BR/>Eck!Eck!https://www.blogger.com/profile/13890237094647111653noreply@blogger.com