[R-390] Collins versus Curry IF Filters

[WA0HQQ]

I recently replaced the failing Collins mechanical filters in my 67 EAC 
R-390A with three of Dave Curry's Longwave Products filters.

So many people asked me to share my measurement results that I wrote a 
report and published it.

The report is available in the "Tutorials" section of the "References" 
page on the R-390A FAQ web site - http://www.r-390a.net

Or - from this direct link: 
http://www.r-390a.net/Collins-Curry-Study.pdf

73,

Al, WA0HQQ

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