I heard another today at 3580 KHz on the Main receiver. Found one of the
stations at 1460. This time I could detect another station faintly overlaid
with the main station from 1460 KHz. This signal was still there after
filtering down to 600 Hz with the roofing filters. Curious to me that these
broadcast stations can hetrodyne up into the amateur bands on this ORION II
even with roofing filters and all that to prevent it. I find AM broadcast
stations on 160 and 80 quite regularly... Maybe something is up with my
SG-230 antenna tuner or other anomalies in my antenna system that is
producing these signals and hence the detection of them by the ORION II. No
way the ORION II is going produce these hetrodynes and detect them in the
amateur bands on the main receiever, right?
Ron KA7U
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com]On Behalf Of Robert & Linda McGraw
K4TAX
Sent: Monday, January 02, 2006 6:21 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] LW receiver
Mixing products of 1160 minus 900 = 260
or
1160 mixed with 1420 = 260 kHz
in these cases, I'd expect to hear audio of both stations at 260.
Another combination is the 2nd harmonic of the local oscillator minus the
455 kHz IF = 250 kHz.
Just do a bit of math, consider any BC station in the area and you'll find
the combination.
73
Bob, K4TAX
----- Original Message -----
From: "Ron" <ron@morell.us>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Cc: <CATFISHTWO@aol.com>
Sent: Sunday, January 01, 2006 7:44 PM
Subject: Re: [TenTec] LW receiver
> Tom,
> Ineresting idea of two AM broadcast stations producing the signal at 260
> KHz, but as I did not hear any signal but the 1160 KHz station there, I
> think it is probably a product of the IF mixer. I was using the Sub
> Receiver. It was a 10 over S-9 signal at 260 KHz and a 40 over S-9 signal
> at 1160 KHz. When I get time, and conditions are similiar and I can tune
> it
> in, I'll hook up my old Tuned Receiver Front End Regenerative (RAK-8)
> receiver and see what I hear at 260 KHz. No IF in that old boat anchor.
>
> Thanks for you reply.
> Ron KA7U
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of CATFISHTWO@aol.com
> Sent: Saturday, December 31, 2005 1:56 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] LW receiver
>
>
>
> In a message dated 12/31/2005 10:31:52 A.M. Pacific Standard Time,
> ron@morell.us writes:
>
> Listening on 260 KHz with my ORION II tonight and heard KSL5 radio in
> Utah
> which broadcasts on 1160 KHz. That would be 900 KHz below their
> broadcast
> frequency. I'm curious about this and wonder what exactly I'm listening
> to.
>
> Besides, it is time to talk about something besides headphones... :)
> Ron KA7U
>
>
>
>
>
>
> I had similar a few weeks ago, and it is possibly "your station" and a
> second broadcast station near by proudcing a ifference frequency between
> the
> 2
> stations and the rig is picking up the combined signal and detecting it at
> .260
>
> it is not a harmonic, but could be a difference freq if two strong am
> stations are close by.
>
> tom N6AJR
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