Which chat frequency do you use?

[DarkHelmet]

Always thought it was 123.45 but I have noticed people using other frequencies. Anyone care to elaborate?

[RV4ker (RIP)]

Most people know about 123.45 so many settle on their own "Numbers". Just more privacy and if you discussing you wife's chrismas present (new boobs) like some were recently) then it's gets a bit tricky

Most will not divulge their ops channel...

[Morph]

We all use 123.45

[DarkHelmet]

Is it true that the lower 123.45 does not "travel" as well as using a higher 135.5 for instance?

[Morph]

Is it true that the lower 123.45 does not "travel" as well as using a higher 135.5 for instance?

Not sure I get the meaining of your question but technically the lower frequencies have longer wavelengths and as a result tend to propogate better. The American military use very low frequencies to communicate to their bases at the north pole for instance in order to get very long distance communications. (there is little or no satellite coverage) The negative of course is that your antenna sizes get longer and in this case they use a 10km long antenna, suspended in a valley between mountains. Just something to add to your mine of useless information.

[Smiley]

You will also find that a ships horn is a "low base", so it can be heard further!!

[kb]

And, you will also find that elephants communicate in ultra low freq, and can communicate up to 15 km away with other ele's, therefore, idling your car next to ele's, can really irritate them, cause they feel unsafe, as they cannot communicate.

[Cloud Warrior]

Ooh ooh I can contribute to this one. The reason the Yanks use ULF radio signals is so that they can communicate with submerged missile and attack submarines - the ULF radio waves penetrate to some depth so the boats don't have to come to periscope depth or surface to receive radio traffic.

[RudiGreyling]

We use our own "Chat" frequency which is not allocated to any other field or use. We choose some thing that is convenient for us.

BUT I have often thought about interference, resonance and shadows of frequencies on other nearby frequencies.

Does anyone know if this interference and resonance is applicable when choosing or alocating a frequency in our band of radio coms frequencies?

Or does the airfields dictate and choose their frequency at will as long as it is not used by someone else?

Regards
Rudi

[RudiGreyling]

Is it true that the lower 123.45 does not "travel" as well as using a higher 135.5 for instance?

Lower frequencies travel further than higher frequencies at the same output level.

That said the actual difference in our band between 123.45 and 135.5 is not that big, compared to the Ultra Low Frequencies used by military.

So you will hardly realise the axtra distance between 123.45 and 135.5

[Wart]

Cloud Warrior, then why do Dolphins and Whales "talk" at high and ultra high frequency?
Maybe they are talking about their neighbours and don't want them to hear?

kb, at what frequency do hippos communicate, and if it is the same as elephants, do you think that the hippos can hear the elephants talking when they are submerged?

This is really thought-provoking stuff

[Cloud Warrior]

Actually you will find that for communication over long distances whales use low frequency sound - have you ever heard Humpbacks "singing"? High frequency sound is used for echo location at short range - the clicks that you hear dolphins make when chasing fish.

[BIG-G]

I guess when we start flying under water, the low frequencies will become important.

[RV4ker (RIP)]

Also think 123.45

[skybound®]

By the way, I am not sure if this is still the case, but the "official" chat frequency that was allocated by CAA for pilots to chat on was 130.35
Is this still the case? I think so.....

Nope, was Notamed quite a number of years ago and replaced with 123.45. At the time I think SA was one of few countries not using 123.45 and also remember there being something about that the 130.35 was infringing on the frequencies that the air force normally use for special ops. Not the exact freq, but close.