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What is eSSB?
http://www.essb.us/what_is_essb.html#:~:text=Typical%20SSB%20audio%20bandwidth%20is%20less%20than%203kHz,is%20designated%20by%20the%20FCC%20as%20J3E%20mode.
Enhanced SSB Audio - K4QKY
http://www.k4qky.com/files/enhancedssbaudio.pdf
A few ssb audio experimenters have extended their transmit bandwidth well beyond 3 KHz. Some hams who object to change or new ideas have complained to the FCC. • The FCC has sent warning letters to three hams. • The FCC has also been petitioned to limit transmit bandwidth to 2.8 KHz 190 responses of which only 25 were supportive
SSB Audio Bandwidth - Legal Limit? | QRZ Forums
https://forums.qrz.com/index.php?threads/ssb-audio-bandwidth-legal-limit.749900/
There's no LEGAL audio bandwidth limit for SSB (except for 60 Meters) and 10 kHz bandwidth would not be unimaginable for A,M but there IS "good engineering practice" as well as consideration of other operators, at least in a crowded band, such as most HF.
SSB Audio Bandwidth - Legal Limit? | Page 2 | QRZ Forums
https://forums.qrz.com/index.php?threads/ssb-audio-bandwidth-legal-limit.749900/page-2
That is fascinating to know there isn't an audio frequency limit per se, other than common courtesy. Of course, purely from a basic communication standpoint it is kind of wasting RF to pump out such a high bandwidth. But yes, the 10 KHz wide transmitter I observed had a very sharp bandpass, fully utilizing the spectrum right to the edge, so they obviously took great …
Increasing the SSB/AM audio RX & TX bandwidth on the ICOM ...
http://www.wz5q.net/docs/ea3hru_ic756_rx_and_tx_bandwidth_mods.pdf
The 756 AM/SSB TX bandwidth is limited to about 2.7 kHz natively. Those are pretty common figures in amateur transceivers and nothing to be ashamed of. Maybe you are in luck and you own a later model as I do, in such case, you’ll have a tiny switch near the 455 kHz crystal filters labeled W/N that can increase your TX bandwidth up to 2.9 kHz (see
Ham Radio Single Sideband SSB - Electronics Notes
https://www.electronics-notes.com/articles/ham_radio/voice-modes/single-sideband-ssb.php
In reality the bandwidth of the SSB signal is a little more complicated. The bottom frequencies are often limited to around 300 Hz, so this reduces the bandwidth to 2.7 kHz, and some transceivers tend to limit the frequency response even more to 2.4 kHz. Many modern amateur radio transceivers allow the upper and lower filter frequencies to be adjusted so some …
W4NEQ SSB audio
http://w4neq.com/htm/hamaudio.htm
In the case of ssb, adding just a bit more to the 2.4 or 2.7 kHz normal bandwidth, say 500 Hz, adds a lot to the perceived quality. Back to our basic question: Are we after maximum intelligibility (through a noisy medium), or the most natural sound?
What is Extended SSB ( eSSB ) ? - Extended Single Sideband ...
http://www.nu9n.com/essb.html
" Extended SSB " or " e SSB" is any J3E SSB transmission that exceeds the audio bandwidth of standard or traditional 2.9kHz SSB J3E modes (ITU 2K90J3E) starting at 3kHz (ITU 3K00J3E), in order to support the fidelity required and desired for relative high fidelity, full range clean and articulate vocal audio. SSB and eSSB EXAMPLES
Improving the intelligibility of SSB transmissions
https://g8jnj.webs.com/SSB%20intelligibility%20part%201.pdf
2000Hz. Unfortunately, most SSB transmitters use a filter with a bandwidth of around 2400 to 2800Hz that removes the upper part of this range, making the remaining consonants in the 800 to 2500Hz range particularly significant. If you have a receiver with variable bandwidth filters and the ability to shift the passband, you can try
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