K3 in data A mode
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I'm trying to get my system set up for RTTY. I think I have the cabling
OK. Using MTTY I can decode signals fine but when I try to transmit, I get no power out. The MTTY program keys the VOX and I have 5 bars of ALC but nil on the wattmeter! Help! 73, Roger N1RJ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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You should be in AFSK A mode. RTTY is a leer sideband mode.
Sent from my iPhone ...nr4c. bill > On Oct 10, 2017, at 4:37 PM, Roger D Johnson <[hidden email]> wrote: > > I'm trying to get my system set up for RTTY. I think I have the cabling > OK. Using MTTY I can decode signals fine but when I try to transmit, > I get no power out. The MTTY program keys the VOX and I have 5 > bars of ALC but nil on the wattmeter! > > Help! > > 73, Roger N1RJ > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Roger D Johnson
Roger,
I assume you are using AFSK A data sub-mode. Check the data submode to be certain. Do you have anything other than the soundcard audio lines, the RS-232 computer connection, the DC power cable, the wattmeter and antenna (or better yet a dummy load) connected to the K3? If so remove everything except those items. It appears you have the audio set about right, although the 5th bar should be only flickering, not on solid. Try again with the bare K3 and see what happens. If you have the KAT3 installed, do an ATU TUNE into the dummy load to set the L/C components to match the dummy load. 73, Don W3FPR On 10/10/2017 4:37 PM, Roger D Johnson wrote: > I'm trying to get my system set up for RTTY. I think I have the cabling > OK. Using MTTY I can decode signals fine but when I try to transmit, > I get no power out. The MTTY program keys the VOX and I have 5 > bars of ALC but nil on the wattmeter! > > Help! > > 73, Roger N1RJ > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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I tried it in LSB mode and it works fine! I checked and both the CW and SSB
fikters are selected for data mode. On 10/10/2017 5:36 PM, Don Wilhelm wrote: > Roger, > > I assume you are using AFSK A data sub-mode. Check the data submode to be > certain. > > Do you have anything other than the soundcard audio lines, the RS-232 computer > connection, the DC power cable, the wattmeter and antenna (or better yet a > dummy load) connected to the K3? > If so remove everything except those items. > > It appears you have the audio set about right, although the 5th bar should be > only flickering, not on solid. > > Try again with the bare K3 and see what happens. If you have the KAT3 > installed, do an ATU TUNE into the dummy load to set the L/C components to > match the dummy load. > > 73, > Don W3FPR > > On 10/10/2017 4:37 PM, Roger D Johnson wrote: >> I'm trying to get my system set up for RTTY. I think I have the cabling >> OK. Using MTTY I can decode signals fine but when I try to transmit, >> I get no power out. The MTTY program keys the VOX and I have 5 >> bars of ALC but nil on the wattmeter! >> >> Help! >> >> 73, Roger N1RJ >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] >> > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Roger,
That statement does not make a lot of sense - explanation below: With the K3 (and K3S, KX3 and KX2), there are no specific CW and SSB filters - as there is with the K2. The DSP filter bandwidth is set with the WIDTH/SHIFT (or HI CUT.LO CUT) knobs and any roofing filters will switch in and out as the bandwidth is changed. The bandwidth is what you select with the two knobs (stay away from the XFIL button). The default width for AFSK is narrow - but that applies to receive only. Tune in a single RTTY signal with the VFO and look for the decode in MMTTY if using it that way. If you are using a waterfall display, then you would normally set the bandwidth to something resembling the SSB bandwidth of 2.7 or 2.8 kHz. Set the DSP filter bandwidth according to the method you are using for RTTY (either click on a waterfall or tune to the RTTY signal with the VFO [when using a narrow bandwidth]). For RTTY, use AFSK A since you are using the soundcard. It turns off compression and sets the TX and RX EQ to flat automatically. AFSK A defaults to LSB which is standard for RTTY. Your compression and EQ settings for SSB will remain the same and there is no need to set them to off (flat for EQ) when using DATA modes. The receive filter width means nothing for transmit, the 2.7 or 2.8 kHz filter should be selected for DATA mode transmit. Use K3 Utility to check the filter that you have enabled for transmit in DATA modes - it must be the 2.7 or 2.8 kHz filter. 73, Don W3FPR On 10/10/2017 6:27 PM, Roger D Johnson wrote: > I tried it in LSB mode and it works fine! I checked and both the CW > and SSB fikters are selected for data mode. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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