Re: [IRCA] Image Frequency Question

[kj8o@xxxxxxxxxx]

Hi Paul,

Noted, but going from 5kw to 235w would still have the intermod present, but 
it would be so week that no one would be able to hear it any more.

JM


On Mon, 23 Feb 2009 19:51:54 -0600, Paul B. Walker, Jr. wrote
> Ty's 730 isn't a daytimer, it is actually 5KW Day/235W Non Directional.
> 
> Both 730 and 1240 spew IBOC hash and theyre on the same tower.
> 
> Paul Walker
> www.onairdj.com
> 
> On Mon, Feb 23, 2009 at 7:47 PM, <kj8o@xxxxxxxxxx> wrote:
> 
> > Here in the Detroit Michigan area, we have at least one intermod:
> >
> > FM band: 98.7 + 105.9 = 204.6 / 2 = 102.3 and due to the capture effect
> >   on FM, only the stronger of the two signals (98.7) is heard. Both
> >   transmitters are approx. 5 miles apart from each other.
> >
> > And as a side note, back to the original request, I'd look at 730 + 970 =
> > 1700 / 2 = 850, especially if 73 is a daytimer and if it is heard on more
> > than radio.
> >
> > Good job, and 73 de Joe, KJ8O, Troy, MI
> >
> >
> >
> > On Mon, 23 Feb 2009 16:28:16 -0700, Deane McIntyre wrote
> > > On 23-Feb-09, at 1:46 PM, Ty T wrote:
> > >
> > > > Hello,
> > > >
> > > > While the topic of frequency imaging is being discussed, I have one
> > > > to ask.  Here in Billings, MT I can pick-up our local 970, KBUL on
> > > > 850 during the day.  It comes in just like it was actually on 850.
> > > > At night, it is no longer present and KOA Denver usually comes in
> > > > like a local themselves.  Any ideas why 970 images onto 850?  The
> > > > other locals here are 730, 790, 910, 970 and 1240.  The only other
> > > > imaging I have noticed locally is a faint image of 730 onto 1090.
> > > >
> > >
> > > Most likely a mixing (intermod) product with your local on 910.
> > > 2 x 910 - 970 = 850
> > >
> > > 2 x 910 - 730 = 1090, which gives you your other mixing product
> > >
> > > Here in Calgary I get a few of these from our 50 kW locals on 660,
> > > 770, 910, 960, 1010, 1060, 1140:
> > >
> > > 2 x 660 - 770 = 550
> > >
> > > 2 x 960 - 1060 = 860
> > >
> > > 2 x 1140 - 1060 = 1220
> > >
> > > are the worst
> > >
> > > 73,
> > >
> > > Deane McIntyre VE6BPO
> > > Calgary AB
> > >
> > > _
> >
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-- Joe Miller, KJ8O, Troy, MI -- Grid EN82 --
--- WOW! Homepage (http://www.wowway.com) ---

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