Re: Early results of 7.5" Amidion rod
Hello Roy and Neil,
Thanks for your comments on our group, Neil.
Roy, in my previous post there was a description of the method that Steve Ratzlaff and I used to optimize AM reception in the Tecsun PL-300WT and G8 models, and to determine the optimum loopstick coil inductance for peak AM sensitivity in the stock models (and in the 7.5" Amidon loopstick transplant models). That procedure is actually described in a file posted in our Ultralightdx site (under modifications), and is also directly linked at http://www.mediafire.com/?jyjg5hmkyqm .
Once we determined the optimum loopstick coil inductance for peak AM sensitivity in the models, we simply wound a fixed 40/44 Litz wire coil of the same inductance on the 7.5" Amidon ferrite bar, and obtained great results every time. Although their AM sensitivity was equal to the best of the modified Ultralights, unfortunately the fixed 3 kHz DSP selectivity in the 7.5" loopstick PL-300WT/ G8 models made them uncompetitive in transoceanic DXing when compared to the CFJ455K5 filter-modified E100 Slider and SWP Slider 7.5" loopstick models, so we didn't make too many of the modified PL-300WT/ G8 models last spring.
73 and Good DX, Gary
In a message dated 1/13/2010 5:51:24 P.M. Pacific Standard Time, neil.findlay52@... writes: