ARRL, RSGB (RadCom), W8JI and Sherwood always use 500 Hz or the "Closest Available to 500 Hz" (per ARRL Test Procedure). Sherwood is the only tester who sometimes uses additional bandwidths but they are always footnoted.
73, Bill W4ZV I understand that, because I pore over others test data to compare my own receiver work with the professionals. And I know the difference in dynamic range between 400 Hz and 500 Hz is very, very small. But in a comparison of different receivers the test bandwidth "should", in my opinion, be included in the comparative data to nail it down. If I was giving a talk at my local ham club, I could measure the K3 MDS with the DSP bandwidth at 50 Hz and make the K3 sensitivity and dynamic range look even better. But...of course that would be a little deceitful, eh? IMHO the viewer should not have to go to the Sherwood test and the ARRL test to verify the dynamic range is for the same bandwidth. All it takes is a statement of the bandwidth and the basis for the data is fully defined without having to go back to original sources and figuring it out for yourself: a significant level of trust is instantly established in the data. No games need to be played for the K3 to look good and I'd hedge my position by explicitly stating the comparative bandwidths. Bill - W7AAZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
