Re: [Elecraft] [KX3] Digital transmissions problems solved finally
Correct. JT-65 has common frequencies on each band. Then JT-9 is about 2 kHz higher from JT-65, thus the move in frequency. There is a box to be checked on the application when changing from JT-65 to JT-9. It is best if the radio is under CAT control. Most issues in this regard are resolved by the software. 73 Bob, K4TAX On 7/18/2015 11:53 AM, WA8JXM wrote: Some of t he JT-65/JT-9 software has a +2 kHz offset option that moves the transmit carrier up 2 kHz to keep it in the proper transmit bandpass. Ken WA8JXM On 18/07/2015 00:01, Gary Hawkins wrote: The identified problem - I was trying to transmit the test Tone and JT9 signal above the 2.8KHz upper bandwidth limit on the TX path of the KX3. No matter what you have the RX bandwidth set to, the maximum audio frequency that will go through the transmit chain is 2.8kHz. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Digital transmissions problems solved finally
Some of t he JT-65/JT-9 software has a +2 kHz offset option that moves the transmit carrier up 2 kHz to keep it in the proper transmit bandpass. Ken WA8JXM On 18/07/2015 00:01, Gary Hawkins wrote: The identified problem - I was trying to transmit the test Tone and JT9 signal above the 2.8KHz upper bandwidth limit on the TX path of the KX3. No matter what you have the RX bandwidth set to, the maximum audio frequency that will go through the transmit chain is 2.8kHz. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] [KX3] Digital transmissions problems solved finally
With considerable help from Don Wilhelm (greatly appreciated), and after several conversations with Elecraft I finally solved by JT65/JT9 transmission issues. The equipment was PC running WSJT-X/HRD and an unmodified Signalink. WSJT-X was in transmit mode, I could hear the tones using the Mon connector on the Signalink, the audio tones were making it to the tip of the KX3 Mic connector (used amplified audio amp connected to tip and Ring 2), and yet the ALC would not go above zero and nothing was being transmitted by the KX3 no matter how I set up the mic level and various Windows/Signalink level controls. The identified problem - I was trying to transmit the test Tone and JT9 signal above the 2.8KHz upper bandwidth limit on the TX path of the KX3. No matter what you have the RX bandwidth set to, the maximum audio frequency that will go through the transmit chain is 2.8kHz. Hope this information saves someone else a lot of trial and error trying to determine what's gone wrong in their digital setup. 73's Gary K6YOA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
