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WHY
- Thread starter 1iwilly
- Start date
Maybe because of bandwidth limits on Amateur Radio? The Kenwood 940 & 950 had lots of mods that really make them Wide but those doing so did not make any friends on the air being 5kc's or even wider on transmit. I believe many of the new SDR's will also get Very wide but again you will make plenty of enemies. It's not like 11 meters where nobody cares. 3 kc's is pushing it to where it should be & most don't go over 2.9 which is plenty.
Do a search for ESSB Ham Radio
Might be what you are looking for.
73
Jeff
Might be what you are looking for.
73
Jeff
Well said...........
Splattering up the band you're on most definitely does not make your fellow amateurs happy. Plus it's really not needed with modern rigs since they mostly have excellent audio out capabilities.
eSSB | Extended Single Sideband Hi-Fi Audio
You will find mods for a number of popular HF rigs.
73
Jeff
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This FCC requirement is specifically related to DATA transmissions only, and not voice.
(I'm not in the USA, so I'm not sure what the USA voice bandwidth requirements are).
In many parts of the world ESSB is perfectly legal and enjoyed by many, including me (and it is hated by some sad hams too! haha). The ESSB groups are a great resource for the type of modifications you are referring too. Properly controlled wide bandwidth SSB is not splatter. And it sounds incredible on a properly configured RX. ESSB works especially well with good SDR equipment also.
Where I am from it is used mostly on 160M and on 10m, where the bands are very quiet with lots of room for activities. You won't see it fire up in the middle of 20m during a contest, so everyone can relax.
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Last I recall it was 3kc wide on Phone in the USA. It's why technically if you are a Technician Class that you are actually pushing the limits if you operate say,28.300.00 because half of your transmitted signal would be Out of your authorized Band at 28.298.500 & the same for General Class or Advanced Class operators on their respective band edges. It's the same for either of those license classes. I was taught this as a Technician in the early 90's. I for one don't have any desire to sound like the BBC because I think their audio is Not very appealing & you can go listen for yourself & hear that it's nothing to brag about.This FCC requirement is specifically related to DATA transmissions only, and not voice.
(I'm not in the USA, so I'm not sure what the USA voice bandwidth requirements are).
In many parts of the world ESSB is perfectly legal and enjoyed by many, including me (and it is hated by some sad hams too! haha). The ESSB groups are a great resource for the type of modifications you are referring too. Properly controlled wide bandwidth SSB is not splatter. And it sounds incredible on a properly configured RX. ESSB works especially well with good SDR equipment also.
Where I am from it is used mostly on 160M and on 10m, where the bands are very quiet with lots of room for activities. You won't see it fire up in the middle of 20m during a contest, so everyone can relax.
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News
Bandwidth Limits Replace Symbol Rates on the HF Bands, Other Bands Open for Comment
12/08/2023The Federal Communications Commission (FCC) published new rules adopted last month that replace the symbol rate restrictions on the HF bands with a bandwidth limit of 2.8 kHz. The new rules go into effect January 8, 2024.
The bands and band segments affected by the rules change are those authorized for data transmission between 160 and 10 meters, exclusive of 60 meters (where no change was made).
In adopting a bandwidth limit in place of the baud rate limit the FCC agreed with ARRL that some limitation is necessary because "without a baud rate or bandwidth limit, data stations using a large amount of spectrum for a single emission could do so to the detriment of simultaneous use by other stations using narrowband emission modes."
Note the words "Authorized for Data transmission " in the above quote that is missing from the previous post
There are some great sounding stations running extended single sideband on 40 meters
There are groups of hams doing this without wreaking the bands as some claim.
Different Strokes for Different Folks
Ham radio was built on experiments by stations pushing the boundaries, if not for this we would still be using spark gap transmitter tech......
73
Jeff
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