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billybob_chider

Tropo- Friend or Foe?

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Whereabouts in Western Sydney do you live matt86?

Blacktown. I have a good view to the West and a reasonable view to the North while slightly shaded to the south and east. Good for receiving, it helps block some of the sydney high power. I usually get 2ST quite well on 102.9.

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Umm, Whats "Troppo" ?  :blink:

Tropospheric Ducting. :P Atmospheric conditions that allow reception of stations too far to receive under normal conditions eg increased strength of Newcastle stations coming into Sydney.

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Beat this, one tropo here in Brisbane, 3BO FM, Star FM Bendigo and Magic FM Renmark, all in crystal clear stereo. (quote)

That aint tropo, that's sporadic E. What was the nature of the signal? Did it wave in and out or remain constant for a while? If the former, then sporadic E. If the latter, then really strong tropo. I've got Sporadic E (signals bouncing off the ionosphere like shortwave) from New Zealand from Sydney. Stations heard include More FM Auckland and The Rock from Napier. The distances are 2200 km to Auckland and about 2500 km to Napier. Also, in Shepparton Victoria, i got Sea FM 100.7 Townsville and 4 MK 101.9 Mackay in sporadic e.

Sporadic E differs from tropo in that it bounces FM signals off the ionosphere (many hundreds of K's above the earth's surface) via rare 'clouds'. This allows for FM signals to propogate 1000's of kilometres. Tropo, on the other hand, bounces off the troposphere where most weather is located, and it only reaches about 40 km above the earth. Hence, the FM signals in tropo are more constant but less spectacular. Tropo occurs in periods of calm weather in summer, and is caused by temperature inversions in smog etc. Both tropo and sporadic e occur most commonly in the summer months. So, in short, Renmark/Bendigo from Brisbane is most likely to occur via Sporadic E.

For your Sporadic E reception do you use an outdoor aerial ? I never get anything like that. The FM band is too crowded in the city esp when you are up high and see those high power sydney towers. There are so many community stations too crowding the dial from 99.1 to 100.9 and also from 87.6 to 90.5 FM....

I think i need to drive to the country to get that or be behind a mountain to block sydney reception . I have got Canberra from sydney once that my record.... That Manning River one comes in too. Not sure which is further.

Ahhhh listing to c91.3 classic collection tonight. Its great. No tropo for that station even though I'm listening illegally (Outside the lic area) ! :blink:

I have posted this before...

http://www.geocities.com/toddemslie/Aust_T...nce_records.htm

Have a look.

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If you had an FM transmitter on the moon could it get to here ? Or no atmosphere for the waves to get to us?

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If you had an FM transmitter on the moon could it get to here ? Or no atmosphere for the waves to get to us?

FM frequencies should be high enough. How far is the moon? Radio Waves don't need an atmosphere to travel through as they can travel through a vacuum. For space radiocommunications, the higher the frequency, the better as it goes straight through the Ionosphere. Low frequecies get bounced back.

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If you had an FM transmitter on the moon could it get to here ? Or no atmosphere for the waves to get to us?

FM frequencies should be high enough. How far is the moon? Radio Waves don't need an atmosphere to travel through as they can travel through a vacuum. For space radiocommunications, the higher the frequency, the better as it goes straight through the Ionosphere. Low frequecies get bounced back.

It would be interesting if they transmitted say a FM radio station there how strong the signal would be! WOuld be interesting if they picked a sydney freq as an FM freq and we had a full moon.. Which would be strongest if it was in the right position... Not sure how far the moon is away from earth?

I was on a plane once and being a bad person :blink: and listening to WS FM up to the queensland border around about. We didn't crash, they ask you to not listen to radio equipment on a plane but I was so tempted being a radio person. Is it a big crime to listen to the radio in a plane?

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It would be interesting if they transmitted say a FM radio station there how strong the signal would be! WOuld be interesting if they picked a sydney freq as an FM freq and we had a full moon.. Which would be strongest if it was in the right position... Not sure how far the moon is away from earth?

Don't forget if you were on the moon you are in line of sight of literally thousands on FM radio stations on Earth. I doubt you would be able to receive any single station up there clearly, depending on the signal strength they would co-channel each other. I can't say really though, I have never been to the moon :blink:

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I was on a plane once and being a bad person :blink: and listening to WS FM up to the queensland border around about.  We didn't crash, they ask you to not listen to radio  equipment on a plane but I was so tempted being a radio person. Is it a big crime to listen to the radio in a plane?

Normal AM/FM radios are fine to use on board aircraft, although they tell you not to use them when the plane is ascending or descending. I've picked up Sydney and Melbourne FM at the same time at 30,000 feet and listened to NZ halfway across the Tasman at the same height. Hot 91 on the Sunshine Coast in QLD was able to be picked up all the way to just south of Tamworth in the air.

--

Mechsta

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I was on a plane once and being a bad person  and listening to WS FM up to the queensland border around about. We didn't crash, they ask you to not listen to radio equipment on a plane but I was so tempted being a radio person. Is it a big crime to listen to the radio in a plane?

I've done the same thing several years ago. On a trip from Sydney to the Gold Coast and ofcourse I had the trusty walkman to test radio services on the plane (would have liked to test using a car radio, but for obvious reasons....). I found that everything worked really well, the problem was always local services you were flying over. Example, 104.1 worked virtually until Coffs Harbour when it finally got taken over by CHY Coffs Harbour etc. I found even low power services (community stations) worked rather well for their type. Most worked until you get too close to other services on the same frequency. The only station that didn't have anything on the same freq. from memory was 101.7 (it was still 2WS then BTW) which didn't really cut in and out, just got gradually weaker and weaker until eventually the noise floor rose above the audio. We were almost at QLD by that stage, and that was only on a walkman. Like I said, would have liked to try a car radio up there.

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I was on a plane once and being a bad person  and listening to WS FM up to the queensland border around about. We didn't crash, they ask you to not listen to radio equipment on a plane but I was so tempted being a radio person. Is it a big crime to listen to the radio in a plane?

I've done the same thing several years ago. On a trip from Sydney to the Gold Coast and ofcourse I had the trusty walkman to test radio services on the plane (would have liked to test using a car radio, but for obvious reasons....). I found that everything worked really well, the problem was always local services you were flying over. Example, 104.1 worked virtually until Coffs Harbour when it finally got taken over by CHY Coffs Harbour etc. I found even low power services (community stations) worked rather well for their type. Most worked until you get too close to other services on the same frequency. The only station that didn't have anything on the same freq. from memory was 101.7 (it was still 2WS then BTW) which didn't really cut in and out, just got gradually weaker and weaker until eventually the noise floor rose above the audio. We were almost at QLD by that stage, and that was only on a walkman. Like I said, would have liked to try a car radio up there.

I'm glad I'm not the only one who has tried this! Its fun... Except if you go on an international flight its not as good... I think they are up higher. I tried to listen over asia but could not get much. Maybe the transmitters ain't as strong.

Its shows you how far FM can potentially travel!!

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How about Adelaide FM in Albany Western Australia.

I remember hearing SA-FM 107.5 there during the summer a few years ago there on a car radio...

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I tried to listen over asia but could not get much. Maybe the transmitters ain't as strong.

No I have been told they dont use as much power overseas. 5kw would be considered a major metrapolitain highpower station overseas

How about Adelaide FM in Albany Western Australia.

I remember hearing SA-FM 107.5 there during the summer a few years ago there on a car radio...

I remember when I was over in S.A. on holiday some years ago that SAFM from Adelaide worked in places quite distant. Port Lincolin, Port Augusta etc. There's not much in between Adelaide and those places though.

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I tried to listen over asia but could not get much. Maybe the transmitters ain't as strong.

No I have been told they dont use as much power overseas. 5kw would be considered a major metrapolitain highpower station overseas

It also depends on where in Asia you were.

The Japanese FM Radio band goes between 76-90MHz so any walkman or radio from Australia won't work there, as our radios are tuned for the FM band in the 88-108MHz spectrum.

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I tried to listen over asia but could not get much. Maybe the transmitters ain't as strong.

No I have been told they dont use as much power overseas. 5kw would be considered a major metrapolitain highpower station overseas

It also depends on where in Asia you were.

The Japanese FM Radio band goes between 76-90MHz so any walkman or radio from Australia won't work there, as our radios are tuned for the FM band in the 88-108MHz spectrum.

Tell me if I bought a japanese radio could I get anything here on those freq. For example the NRL games or the other FM stations where you can only get with a "special" radio (example chinese radio).

How about other parts of the world? What does Russia use ? I think Russia use LW.... Anyone else use this? I know that america uses 10k instead of 9k for AM. China I think use the same system as us. I don't know about Africa and South America.

Has anyone been to Northern America?

http://www.nyradioguide.com looks like there is a lot of radio stations just in new york. I think our am band here is a little empty. They should put some more foreign speaking channels that have just one language. For example a mandarin , Korean, maybe arabic ... rather than having them off band. And also have a dedicated childrens channel.

Are the broadcast ownership laws different there?

Matt

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Tell me if I bought a japanese radio could I get anything here on those freq. For example the NRL games or the other FM stations where you can only get with a "special" radio (example chinese radio).

How about other parts of the world? What does Russia use ? I think Russia use LW.... Anyone else use this? I know that america uses 10k instead of 9k for AM. China I think use the same system as us.  I don't know about Africa and South America.

Has anyone been to Northern America?

http://www.nyradioguide.com looks like there is a lot of radio stations just in new york. I think our am band here is a little empty. They should put some more foreign speaking channels that have just one language. For example a mandarin , Korean, maybe arabic ... rather than having them off band. And also have a dedicated childrens channel.

Are the broadcast ownership laws different there?

Matt

If you bought a radio made for use in Japan (not necessarily a Japanese made radio), you would only get any FM stations that are beetween 88-90Mhz.

The Japanese FM band is located between our (Australian) TV channels 2 & 3.

It is the only place in the world that has their FM band there. As far as I'm aware, every where else in the world have their FM band the same as ours, 88-108MHz.

I'm pretty sure every where around the world (Japan inc.) have their AM band the same 530-1700KHz, it's just some countries use 9KHz spacing eg. Aus. & some use 10KHz spacing eg. USA.

Yes, broadcast ownership laws are different in the US to here.

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Yesterday afternoon (22/7/05) at around 3pm, I got 2GZ-FM & Star FM from Orange at home in Minto. It was there for a few minutes, but has since disappeared. It was heard quite well, despite some interference from Triple M for 2GZ-FM (105.1) & Triple J for Star FM (105.9). Pity that Star FM Orange has the same program as Sea FM Gosford at the time I picked up Star FM from Orange, which the latter station can be heard very well. That program is 'The Benchwarmers' in case you haven't worked it out. :blink:

Orange FM stations in my location can be heard from time to time, but not all the time.

There are certain locations in around the Campbelltown area where Orange FM stations can be heard on a regular basis.

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