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Old July 9th 04, 06:19 PM
Frank Dresser
 
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"Honus" wrote in message
...


What I meant was that 10000 KHz had an image 910 KHz below it, but a

station
that I received at 10855 KHz didn't produce an image 910 KHz below that
frequency. I was wondering why that was; why some frequencies produced
images, but others didn't. Sorry if I wasn't clear.





My first wild guess is 10855 wasn't the actual frequency of the
transmission, but it was the image of 11765. 11765 is in a standard
shortwave broadcast band. My older copy of Passport says that the BBC used
that frequency, but I don't know if they're still using it.


Here's some numbers:

Desired frequency -- 10000 kHz
Image frequency -- 9090 kHz

Desired frequency -- 11765 kHz
Image frequency -- 10855 kHz

Frank Dresser


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Old July 9th 04, 07:11 PM
Mark Zenier
 
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In article ,
Frank Dresser wrote:

My first wild guess is 10855 wasn't the actual frequency of the
transmission, but it was the image of 11765. 11765 is in a standard
shortwave broadcast band. My older copy of Passport says that the BBC used
that frequency, but I don't know if they're still using it.


BBC African track from 5:00-6:00 UTC. Same program as 6005 kHz.
On most days, it's 1/2 hour of world news and Daybreak Africa
for 1/2 hour.

Mark Zenier Washington State resident


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Old July 11th 04, 07:43 AM
Honus
 
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"Frank Dresser" wrote in message
...

My first wild guess is 10855 wasn't the actual frequency of the
transmission, but it was the image of 11765. 11765 is in a standard
shortwave broadcast band. My older copy of Passport says that the BBC

used
that frequency, but I don't know if they're still using it.


Ha! I think you've figured it out, Frank. I should have caught that one
myself! Thanks again for your help.


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Old July 11th 04, 03:01 PM
Frank Dresser
 
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"Honus" wrote in message
...


Ha! I think you've figured it out, Frank. I should have caught that one
myself! Thanks again for your help.



Yeah, it seems likely you were hearing an image if you were hearing a
broadcast station way out of band. It's not so clear if you were hearing
some utility station, but there's less utility traffic on the bands than
there was thirty years ago.

Bill McFadden posts his Handy Shortwave Chart on this group on a regular
basis. If you haven't seen it, here's a link:

http://www.rdrop.com/users/billmc/handy_chart

Although it's worth remembering that many stations broadcast just past the
edges of the officially recognized bands.

Frank Dresser


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Old July 14th 04, 04:09 AM
Mediaguy500
 
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ut there's less utility traffic on the bands than
there was thirty years ago.


Is it still worth it to get a CW/RTTY decoder which are still advertised in
magazines such as "Popular Communications" and "Monitoring Times"?




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Old July 14th 04, 03:59 PM
Frank Dresser
 
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"Mediaguy500" wrote in message
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Is it still worth it to get a CW/RTTY decoder which are still advertised

in
magazines such as "Popular Communications" and "Monitoring Times"?



I don't do utility listening, and I can't offer a useful opinion on
decoders. It might be worth starting a new thread with your question.

Frank Dresser


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