[CQ-Contest] Bandpass filter

Tom W8JI w8ji at w8ji.com
Wed Jul 4 06:39:38 PDT 2012

> The specific coupling is going to vary with a ton of factors.  But I am 
> sure the C31 is going to be a pretty rough case.  5B4AGN measured coupling 
> between the separate feed configurations and found -12db from 15 driven to 
> 20 receive.  Other combos had greater losses.

Undesired power levels are **generally** worse from a higher frequency 
element to a lower frequency element, rather than the other way around. The 
wider the spread the greater the difference. My 15M puts 15M energy to my 
40's much better than the 40M puts 40M energy into the 15M.

73 Tom 

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