[BC] "Mixing Product" for all you smart engineers...

[Barry McLarnon]

On Tuesday 22 January 2008 17:20, Paul B. Walker, Jr. wrote:
> I was coming back from Greenwood this afternoon about 2:45 PM.
>
> The Single, 1/4 Wave (150 foot) tower for WABV 1590 is about 18 1/2
> miles form the 5/8 Wave tower for WCRS 1450. Both stations are
> licensed for 1KW, which WCRS runs but WABV is operating on an STA
> with lower power.
>
> Approximately halfway between each tower, I heard 1450 WCRS very
> clearly on 1230Khz... and as far as I know, the person who owns no
> station on 1230 (He owns 1390, but that doesnt simulcast however
> WJES 1200 and WCRS 1450 do, part time)
>
> The closest broadcast tower was 92.9Mhz about 4 miles away.
>
> What caused this and what exactly was I hearing?

Is there a 1340 in the area?  One possibility is a 3rd-order product 
like (2 X 1340) - 1450 = 1230.  In my experience, the most common 
intermod products are of the form 2A - B, followed by A + B - C,
A - B, and 3A - 2B.  So, look for strong signals in the area, plug in 
1450 as one of the variables, and do the math...

Barry

-- 
Barry McLarnon  VE3JF  Ottawa, ON