Spurious Noise yI5eb.34774$Ms2.224@fed1read03...

^ Just FYI:
^ CW Bandwidth = wpm X 4 (e.g., 40 WPM = 160 Hz)
^ From the ARRL License Manual 1976:
^ "With proper shaping, the necessary keying bandwidth is equal to 4
^ times the speed in words per minute for International Morse Code;
^ e.g. at 25 words per minute, the bandwidth is approximately 100
^ cycles."

Thank you. SSB is about twice that right? And isn't SSB the narrowest voice
emission?

Frank

"Frank" schreef in bericht
news:01c3873c$96939df0$0125250a@preimuffyaouanyy.. .
Spurious Noise yI5eb.34774$Ms2.224@fed1read03...

^ Just FYI:
^ CW Bandwidth = wpm X 4 (e.g., 40 WPM = 160 Hz)
^ From the ARRL License Manual 1976:
^ "With proper shaping, the necessary keying bandwidth is equal to 4
^ times the speed in words per minute for International Morse Code;
^ e.g. at 25 words per minute, the bandwidth is approximately 100
^ cycles."

Thank you. SSB is about twice that right? And isn't SSB the narrowest
voice
emission?

No, SSB is about 20 times the bandwith of CW

MRe PE1NQR

Normally the bandwidth of an SSB transmission is about 3.5 kHz. It of course
can be much wider if the transmitter passes frequencies above that. Listen
around 3.945 MHz and you will hear a group that has enhanced audio and they
get broadcast quality SSB along with the expected increase in bandwidth
..
"Frank" wrote in message
news:01c3873c$96939df0$0125250a@preimuffyaouanyy.. .
Spurious Noise yI5eb.34774$Ms2.224@fed1read03...

^ Just FYI:
^ CW Bandwidth = wpm X 4 (e.g., 40 WPM = 160 Hz)
^ From the ARRL License Manual 1976:
^ "With proper shaping, the necessary keying bandwidth is equal to 4
^ times the speed in words per minute for International Morse Code;
^ e.g. at 25 words per minute, the bandwidth is approximately 100
^ cycles."

Thank you. SSB is about twice that right? And isn't SSB the narrowest
voice
emission?

Frank

at 25 words per minute, the bandwidth is approximately 100 " cycles."

Thank you. SSB is about twice that right?

Although 100 Hz is below the low end of the SSB voice range, the high end is
2700 Hz, so the bandwidth (BW) of SSB (with suppressed carrier) is effectively
2700 Hertz.

Bill, K5BY

"Frank" wrote in message
news:01c3873c$96939df0$0125250a@preimuffyaouanyy.. .
Spurious Noise yI5eb.34774$Ms2.224@fed1read03...

^ Just FYI:
^ CW Bandwidth = wpm X 4 (e.g., 40 WPM = 160 Hz)
^ From the ARRL License Manual 1976:
^ "With proper shaping, the necessary keying bandwidth is equal to 4
^ times the speed in words per minute for International Morse Code;
^ e.g. at 25 words per minute, the bandwidth is approximately 100
^ cycles."

Thank you. SSB is about twice that right? And isn't SSB the narrowest
voice
emission?

Frank


An SSB signal is about 3000 cycles/sec (i.e. Hertz) or 30 times as wide. AM
and FM are even wider.

Dee D. Flint, N8UZE