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开云体育I carefully read over the table of contents of the FT-60’s user manual and found nothing about connecting a key in order to transmit CW. Am I missing something? ? Thanks, ? Rick |
开云体育It's an FM rig. If you want to send cw, like as in a beacon, use the audio input with a tone. From: FT-60@... To: FT-60@... Date: Thu, 5 Jun 2014 12:15:25 -0700 Subject: [FT-60] just to verify ? I carefully read over the table of contents of the FT-60’s user manual and found nothing about connecting a key in order to transmit CW. Am I missing something? ? Thanks, ? Rick |
开云体育I think you are saying to transmit unmodulated carrier for silence and a tone which would shift the transmitted frequency from the unmodulated value. It is my understanding that CW would represent no tone as no carrier. So the two methods should sound the same at the receiver but would have different RF signatures. I read () ?that the needed bandwidth for cw is less than 100 Hz and ideally the bandwidth is zero because the carrier is just being turned on and off. ? If I fed in a 1 KHz tone into my FT-60 to generate a dot or dash and fed in nothing for silence, then the bandwidth would be 2 KHz for FM or 1 KHz for SSB. Is that right? ? Am I all wet here? ? Thanks, ? Rick ? From: FT-60@... [mailto:FT-60@...]
Sent: Friday, June 06, 2014 12:51 AM To: FT-60@... Subject: RE: [FT-60] just to verify ? ? It's an FM rig. If you want to send cw, like as in a beacon, use the audio input with a tone. |
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Rick, Modulating an FM transmitter (like the 60R) by feeding tones into the mic jack is called MCW (Modulated CW). It's the same as whistling CW into the mic (if you're good at that!). If your HT is set for Wide modulation (the norm), the bandwidth will be the same as voice, +/- 5 kHz, for a 10 kHz total bandwidth. Many ham clubs provide CW practice this way (tones, not whistling!)?on a local repeater. True CW is turning an unmodulated carrier on and off for the CW characters. To receive this properly, you need a receiver with a BFO (Beat Frequency Oscillator) to generate a tone from the on/off carrier. ? --jim KJ3P |
开云体育Jim, ? It seems that MCW does not have the advantages of true CW. Does anyone just attach a key to the PTT terminals? ? Rick ? From: FT-60@... [mailto:FT-60@...]
Sent: Saturday, June 07, 2014 8:07 AM To: FT-60@... Subject: RE: [FT-60] just to verify ? ? Rick, ? Modulating an FM transmitter (like the 60R) by feeding tones into the mic jack is called MCW (Modulated CW). It's the same as whistling CW into the mic (if you're good at that!). ? If your HT is set for Wide modulation (the norm), the bandwidth will be the same as voice, +/- 5 kHz, for a 10 kHz total bandwidth. ? Many ham clubs provide CW practice this way (tones, not whistling!)?on a local repeater. ? True CW is turning an unmodulated carrier on and off for the CW characters. To receive this properly, you need a receiver with a BFO (Beat Frequency Oscillator) to generate a tone from the on/off carrier. ? ? --jim KJ3P |