MF/HF Radio transceivers

prv said:
Formal maritime traffic, yes. So if you're going to talk to a container ship or a pelagic trawler, it will be on the marine bands..........However, presumably for historical reasons, most of the yachtsmen's social and support nets are on the ham bands.
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Actually it's probably the reverse, around the atlantic anyway. In the USA there is no marine ssb exam requirements, just fill in the form and hand over the money so there are a lot more people with marine SSB callsigns than there are with Ham. More day to day activity seems to happen on the marine SSB frequencies, though there are nets on both SSB & Ham.

http://www.docksideradio.com/east_coast.htm
 
>Licenses cover frequency bands you can transmit on, not what side band you transmit on. Ham generally uses USB above 10Mhz & LSB below, for historical technical reasons apparently, but nothing to stop using either on any allowed frequency.

I agree but the bottom line is there are marine radios and ham radios if you want to use both you need a licence for both. Short rang transmissions are fine on USB and USB is used for long range transmissions which is why marine radios are set up for USB but some can also cover LSB as ours did.
 
Just being lazy here but the answer isn't obvious with 5 mins of googling....

What is covered by the GOC that isn't covered by the LRC?

I'm aware that the former is a requirement for master 200 unlimited and is twice as long and costs twice as much, but what extra stuff do you learn?
 
KellysEye said:
> Short rang transmissions are fine on USB and USB is used for long range transmissions which is why marine radios are set up for USB but some can also cover LSB as ours did.
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That's not actually how it works, USB/LSB are modes, like AM & FM. Long range can be either USB or LSB, it's the frequency which is the main factor. The fact that nearly all ham below 10Mhz is on LSB and above is on USB is historical, nothing to do with range.

Who knows about opening up marine SSB's to transmit on ham bands? Despite being technically against the rules I suspect most can transmit LSB or USB. Anyone know more?
 
GHA said:
...Who knows about opening up marine SSB's to transmit on ham bands? Despite being technically against the rules I suspect most can transmit LSB or USB. Anyone know more?
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What set do you have (or want to open up) ? I have an M710, the change is essentially to replace the firmware configuration file with another one which opens up the bands to user control (including USB/LSB selection). Before doing that, though, I was able to use winlink email (HAM band) via the programmed interface in Airmail with a Pactor controlling the radio. Theres a Yahoo group (that I cant find a link to just now) dedicated to the M710 which has all the links you'd need to make changes, and some other useful tips/techniques.
 
RobbieW said:
What set do you have (or want to open up) ?.
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Just interested really. I've an icom ic7000 ham opened up to transmit on the marine ssb frequencies so the other way round.
There is a link somewhere to some bench tests showing ham radios not being as clean as marine SSB counterparts, though if it's actually possible to tell the difference while transmitting with a decent ham radio at sea on marine SSB (and knowing what you are doing) is another question, dunno.
 
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