Re: [Elecraft] New beta K3 firmware!
Hi Elecraft, When can we expect a new firmware for testing? regards, From: Wayne Burdick n...@elecraft.com To: Gordan Hribar t93x_gor...@yahoo.com Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Friday, September 21, 2012 5:11 PM Subject: Re: [Elecraft] New beta K3 firmware! Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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
Re: [Elecraft] New beta K3 firmware!
Don't we already have the option to beta the feature to use the FM filter for AM via macro's. I'm not sure which way to spin the VFO dial for the band width selection, but the macro seems simple enough to build. To set to AM with the filter set to 13Khz and needing to go to 6Khz: MN038; FLx BW SWT11; press [1] UP; run the vfo dial to the setting for a narrower filter (might be down I'm not at the rig) MD5; Set the rig to AM mode MN255; exit the menu FM Mode: MN038; FLx BW SWT11; press [1] DN; run the vfo dial to the setting for a narrower filter (might be up I'm not at the rig) MD4; Set the rig to FM mode MN255; exit the menu So, anyone that wants to beta the feature just needs to build a couple of macro's? I did not read the whole thread, but this seems obvious. I'll try it tonight. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-RF-feedback-tp7561833p7563212.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] New beta K3 firmware!
On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. In an attempt to quantify this wideband transmit noise, I set up the K3 on the test bench with a dummy load, directional coupler, some attenuators, another receiver and the SDR-IQ. The directional coupler provided a 1 dBm signal with 100W from the K3. 1) I measured the in band noise (noise in the transmit bandwidth) -80 dB relative to 100W output. That is, when the sample was applied directly to the test receiver, the noise pedestal *within* the normal SSB or ESSB bandwidth is ~S8. Out of band (opposite sideband) noise or noise more than 3 to 4 KHz above carrier is at least -100 to -110 dB below PEP (20 to 30 dB below the in band noise). Note: all tests were performed with the microphone unplugged but the mic gain at normal levels and compression set to approximately 15 dB compression (normal operating conditions). 2) In SSB (with the 2.8 KHz roofing filter) the in band noise is roughly 3 KHz wide based on tuning a receiver until the noise drops below MDS (-147 dBm measured) or looking at the spectrum using the SDR-IQ. The out of band noise extends about 1 KHz below Fc (measurements were made on 20 meters USB) and is at least 20 dB below the in band noise level. 3) In ESSB/4.0 KHz (with the FM roofing filter) the in band noise measured 4.5 KHz wide with the receiver and/or SDR-IQ. The LSB noise is 20 to 30 dB below the in band noise level and extends about 4 KHz below Fc. In either case, the out of band noise is at least -100 dB relative to PEP and is likely to produce detectable QRM only to the closest of neighbors with high power operation and even then only within 5 KHz on the opposite sideband. For grins, I looked at the in band/out of band (opposite sideband) noise of a conventional up conversion (Icom) transceiver that I had on the test bench. The in band noise pedestal was also around -80 dB/PEP with out of band (lower sideband) noise about 20 to 30 dB below the in band level extending 3 KHz below Fc. In summary, while using a narrow filter (2.8 KHz for normal SSB, 6 KHz for AM/ESSB) will reduce the out of band products somewhat, using the FM filter results in a signal that is comparable with conventional transceivers. Based on experience with conventional up conversion transceivers, the effects of the opposite sideband noise are generally *less* than those from AGC pumping or transmitted phase noise. Anyone who would complain about transmit noise when the K3 is using an FM filter for ESSB/AM would have the same complaint with a conventional transceiver. One further note, opposite sideband noise was slightly lower in DATA A (and AFSK A) than in USB - perhaps due to changes in filter offset. However, the -80 dB/PEP in-band noise pedestal was still present for the full 3 KHz bandwidth. 73, ... Joe, W4TV On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Do you really want to create a 15-kHz wide swath of broadband noise when using ESSB or AM? I don't. That's why I haven't modified the code to allow use of the FM filter for this purpose. I suppose it could be YAMU (yet another menu entry), forcing you to do at least a minimum amount of soul-searching before going broadband :) 73, Wayne N6KR __ 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
Re: [Elecraft] New beta K3 firmware!
Thankyou Joe, Excellent examination of the situation. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV Sent: Sunday, 23 September 2012 12:23 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] New beta K3 firmware! On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. In an attempt to quantify this wideband transmit noise, I set up the K3 on the test bench with a dummy load, directional coupler, some attenuators, another receiver and the SDR-IQ. The directional coupler provided a 1 dBm signal with 100W from the K3. 1) I measured the in band noise (noise in the transmit bandwidth) -80 dB relative to 100W output. That is, when the sample was applied directly to the test receiver, the noise pedestal *within* the normal SSB or ESSB bandwidth is ~S8. Out of band (opposite sideband) noise or noise more than 3 to 4 KHz above carrier is at least -100 to -110 dB below PEP (20 to 30 dB below the in band noise). Note: all tests were performed with the microphone unplugged but the mic gain at normal levels and compression set to approximately 15 dB compression (normal operating conditions). 2) In SSB (with the 2.8 KHz roofing filter) the in band noise is roughly 3 KHz wide based on tuning a receiver until the noise drops below MDS (-147 dBm measured) or looking at the spectrum using the SDR-IQ. The out of band noise extends about 1 KHz below Fc (measurements were made on 20 meters USB) and is at least 20 dB below the in band noise level. 3) In ESSB/4.0 KHz (with the FM roofing filter) the in band noise measured 4.5 KHz wide with the receiver and/or SDR-IQ. The LSB noise is 20 to 30 dB below the in band noise level and extends about 4 KHz below Fc. In either case, the out of band noise is at least -100 dB relative to PEP and is likely to produce detectable QRM only to the closest of neighbors with high power operation and even then only within 5 KHz on the opposite sideband. For grins, I looked at the in band/out of band (opposite sideband) noise of a conventional up conversion (Icom) transceiver that I had on the test bench. The in band noise pedestal was also around -80 dB/PEP with out of band (lower sideband) noise about 20 to 30 dB below the in band level extending 3 KHz below Fc. In summary, while using a narrow filter (2.8 KHz for normal SSB, 6 KHz for AM/ESSB) will reduce the out of band products somewhat, using the FM filter results in a signal that is comparable with conventional transceivers. Based on experience with conventional up conversion transceivers, the effects of the opposite sideband noise are generally *less* than those from AGC pumping or transmitted phase noise. Anyone who would complain about transmit noise when the K3 is using an FM filter for ESSB/AM would have the same complaint with a conventional transceiver. One further note, opposite sideband noise was slightly lower in DATA A (and AFSK A) than in USB - perhaps due to changes in filter offset. However, the -80 dB/PEP in-band noise pedestal was still present for the full 3 KHz bandwidth. 73, ... Joe, W4TV On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Do you really want to create a 15-kHz wide swath of broadband noise when using ESSB or AM? I don't. That's why I haven't modified the code to allow use of the FM filter for this purpose. I suppose it could be YAMU (yet another menu entry), forcing you to do at least a minimum amount of soul-searching before going broadband :) 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
Hi Joe, Thanks for that analysis! It makes the situation clear to me: The FM filter will do just fine for AM and ESSB, and I can free up a filter slot for a narrow CW filter. Wayne, it would be great to have this option. I hardly ever use ESSB or AM TX, so I can't really justify having a filter just for that if it means I'm missing out a on 200Hz CW filter that would be really useful at times. 73, Thomas M0TRN On 22 September 2012 15:23, Joe Subich, W4TV li...@subich.com wrote: In an attempt to quantify this wideband transmit noise, I set up the K3 on the test bench with a dummy load, directional coupler, some attenuators, another receiver and the SDR-IQ. The directional coupler provided a 1 dBm signal with 100W from the K3. __ 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
Re: [Elecraft] New beta K3 firmware!
*Joe, Thanks for taking the time to conduct the tests. Now that I understand what the rationale for the request to Wayne, I am of the same mind also. As I use the FM filter rarely I would also be able to free up a filter slot and add an additional narrow filter which would be good for me also. I hope Wayne will give consideration to your request in light of your testing and implement it soon. Thanks again Joe for the test results and the reasoning for the request. 73 * On 23 September 2012 08:02, Thomas Horsten tho...@horsten.com wrote: Hi Joe, Thanks for that analysis! It makes the situation clear to me: The FM filter will do just fine for AM and ESSB, and I can free up a filter slot for a narrow CW filter. Wayne, it would be great to have this option. I hardly ever use ESSB or AM TX, so I can't really justify having a filter just for that if it means I'm missing out a on 200Hz CW filter that would be really useful at times. 73, Thomas M0TRN On 22 September 2012 15:23, Joe Subich, W4TV li...@subich.com wrote: In an attempt to quantify this wideband transmit noise, I set up the K3 on the test bench with a dummy load, directional coupler, some attenuators, another receiver and the SDR-IQ. The directional coupler provided a 1 dBm signal with 100W from the K3. __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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
Re: [Elecraft] New beta K3 firmware!
Gary, Joe did testing on a sample size of one K3. While manufacturing of K3s can produce units that behave close to the average, I think it would be wise to test on a greater number of K3s with different configurations. In addition some testing of K3s under fault conditions should be done too. 73, Don W3FPR On 9/22/2012 6:13 PM, Gary Gregory wrote: *Joe, Thanks for taking the time to conduct the tests. Now that I understand what the rationale for the request to Wayne, I am of the same mind also. As I use the FM filter rarely I would also be able to free up a filter slot and add an additional narrow filter which would be good for me also. I hope Wayne will give consideration to your request in light of your testing and implement it soon. Thanks again Joe for the test results and the reasoning for the request. 73 * On 23 September 2012 08:02, Thomas Horsten tho...@horsten.com wrote: Hi Joe, Thanks for that analysis! It makes the situation clear to me: The FM filter will do just fine for AM and ESSB, and I can free up a filter slot for a narrow CW filter. __ 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
Re: [Elecraft] New beta K3 firmware!
It might also be interesting to see what happens to the noise pedestal when audio is added to the equation. 73, Scott, N9AA On 9/22/12 6:31 PM, Don Wilhelm wrote: Gary, Joe did testing on a sample size of one K3. While manufacturing of K3s can produce units that behave close to the average, I think it would be wise to test on a greater number of K3s with different configurations. In addition some testing of K3s under fault conditions should be done too. 73, Don W3FPR On 9/22/2012 6:13 PM, Gary Gregory wrote: *Joe, Thanks for taking the time to conduct the tests. Now that I understand what the rationale for the request to Wayne, I am of the same mind also. As I use the FM filter rarely I would also be able to free up a filter slot and add an additional narrow filter which would be good for me also. I hope Wayne will give consideration to your request in light of your testing and implement it soon. Thanks again Joe for the test results and the reasoning for the request. 73 * On 23 September 2012 08:02, Thomas Horsten tho...@horsten.com wrote: Hi Joe, Thanks for that analysis! It makes the situation clear to me: The FM filter will do just fine for AM and ESSB, and I can free up a filter slot for a narrow CW filter. __ 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
Re: [Elecraft] New beta K3 firmware!
It would be very difficult to measure the out of band noise in the presence of a 100W PEP multi-tone audio signal. Much of the opposite sideband noise would be masked by amplifier IMD which measures -29 dB (3rd order) to -51 dB (9th order) relative to PEP in the ARRL lab (QST, January, 2009). In addition, one would need some very selective filters to reduce the 100 W PEP signal to a level that would allow measuring the out of band (opposite sideband) noise as 100 dB is pushing the range of many spectrum analyzers. In any case, since the in band pedestal is present with no audio, one can assume any out of band noise is also generated with no audio. Don, you can consider my results a sample of two ... although I did not repeat all the tests, my other K3 looks slightly *better* than the one I reported on. Again, the point is that although opposite sideband rejection is better with the narrow filter, even with the FM filter is it (1) no worse than a conventional transceiver, (2) better than transmit IMD from the final amplifier and (3) better than the transmitted phase noise from many rigs. Note opposite sideband suppression in many older rigs is in the -65 to -75 dB range (ARRL Expanded Test Report) vs. an effective opposite sideband suppression in excess of 100 dB for the K3. 73, ... Joe, W4TV On 9/22/2012 6:49 PM, Scott Manthe wrote: It might also be interesting to see what happens to the noise pedestal when audio is added to the equation. 73, Scott, N9AA On 9/22/12 6:31 PM, Don Wilhelm wrote: Gary, Joe did testing on a sample size of one K3. While manufacturing of K3s can produce units that behave close to the average, I think it would be wise to test on a greater number of K3s with different configurations. In addition some testing of K3s under fault conditions should be done too. 73, Don W3FPR On 9/22/2012 6:13 PM, Gary Gregory wrote: *Joe, Thanks for taking the time to conduct the tests. Now that I understand what the rationale for the request to Wayne, I am of the same mind also. As I use the FM filter rarely I would also be able to free up a filter slot and add an additional narrow filter which would be good for me also. I hope Wayne will give consideration to your request in light of your testing and implement it soon. Thanks again Joe for the test results and the reasoning for the request. 73 * On 23 September 2012 08:02, Thomas Horsten tho...@horsten.com wrote: Hi Joe, Thanks for that analysis! It makes the situation clear to me: The FM filter will do just fine for AM and ESSB, and I can free up a filter slot for a narrow CW filter. __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
Joe, That information on the sample of two is good, but since there is variation between them, that is reason for me to suggest additional testing - it takes 3 to vote on the correct answer and several more to determine an average. Joe, that was very good work, and the test setup is not trivial. Yes proper tests at 100 watt PEP would require a lot of careful thought for the exact setup and some very good filters. I too would like to see the FM filter also usable for AM and ESSB. I really never anticipate transmitting in AM or ESSB, there is always the possibility I would like to use it for some demo sessions showing off the K3 capabilities. The cost/benefit ratio is too high for that kind of occasional application. 73, Don W3FPR On 9/22/2012 8:40 PM, Joe Subich, W4TV wrote: Don, you can consider my results a sample of two ... although I did not repeat all the tests, my other K3 looks slightly *better* than the one I reported on. __ 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
Re: [Elecraft] New beta K3 firmware!
Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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
Re: [Elecraft] New beta K3 firmware!
Any hope for serial command support for the receive equalizer? AB2TC - Knut wayne burdick wrote Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: Elecraft@.qth This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-RF-feedback-tp7561833p7563070.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] New beta K3 firmware!
How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
*Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 * On 22 September 2012 03:10, Joe Subich, W4TV li...@subich.com wrote: How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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
Re: [Elecraft] New beta K3 firmware!
Originally sent direct, was meant for the list. Actually, we can run up to 8khz bandwidth, with the exception of 16Khz in the FM segment of 10m, and of course the very very low band. The rules do change above 10M though depending on your license class. What this means is you can actually, legally run 6Khz wide AM on HF. I'm looking at the Amateur LCD right now. It's a common misconception that you can only run 3KHz on HF in VK --- VK3XJM 0416039082 j...@zindello.com.au http://www.zindello.com.au/ On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: *Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 * On 22 September 2012 03:10, Joe Subich, W4TV li...@subich.com wrote: How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
I don't know the motivation for the FM filter request, but I will say that here in the US there are vast expanses of the bands that are mostly unused. For instance, night after night there isn't a single station between 3600 and 3700 kHz here on the west coast. As another data point, I just counted the number of stations currently operating between 28300 and 28500 kHz: a total of 4. Under conditions like these I see no harm in allowing the ESSB stations to experiment. Al W6LX *Joe, I have to ask, why? __ 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
Re: [Elecraft] New beta K3 firmware!
On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: I have to ask, why? Using the FM filter does no widen ESSB or AM ... the bandwidth of those modes is determined by the DSP modulator. The only thing the 8.215 MHz crystal filter does is to provide some additional protection against transmitting the 8.245 MHz image (and according to Wayne, provide some additional rejection of very low level DSP/mixer noise). In any case, the 13 KHz filter is *still* tight enough to eliminate the image - else it could not be used on FM either. In my case, the K3's main RX is full of filters - 13 KHz, 2.8, 1.8, 400 and 200. I can not use AM or ESSB (if I wanted to) without telling the K3 that the 13 KHz filter is really 6 KHz wide. That seems to be a significant headache and makes either FM or AM/ESSB unusable for those who, like me, have a full K3. 73, ... Joe, W4TV On 9/21/2012 5:11 PM, Joshua Mesilane wrote: Originally sent direct, was meant for the list. Actually, we can run up to 8khz bandwidth, with the exception of 16Khz in the FM segment of 10m, and of course the very very low band. The rules do change above 10M though depending on your license class. What this means is you can actually, legally run 6Khz wide AM on HF. I'm looking at the Amateur LCD right now. It's a common misconception that you can only run 3KHz on HF in VK --- VK3XJM 0416039082 j...@zindello.com.au http://www.zindello.com.au/ On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: *Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 * On 22 September 2012 03:10, Joe Subich, W4TV li...@subich.com wrote: How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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 __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
The poster who made that request has made it before. Actually, the width of the transmitted signal should be controlled in the DSP, so Joe does have a point, but the designers at Elecraft are not ready to let go of the bandwidth safety net provided by the 6 kHz filter. Other SDR transmitters can generate AM and ESSB (and FM too) with no roofing filters at all, so it is possible to control the width using only the DSP. 73, Don W3FPR On 9/21/2012 5:21 PM, Al Lorona wrote: I don't know the motivation for the FM filter request, but I will say that here in the US there are vast expanses of the bands that are mostly unused. For instance, night after night there isn't a single station between 3600 and 3700 kHz here on the west coast. As another data point, I just counted the number of stations currently operating between 28300 and 28500 kHz: a total of 4. Under conditions like these I see no harm in allowing the ESSB stations to experiment. __ 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
Re: [Elecraft] New beta K3 firmware!
Hi Gary, The point is not to widen the SSB but to use the FM crystal filter to limit it. The DSP does the actual shaping of the TX signal which will still be the same width regardless of whether you're using the 6kHz filter or the 12.5kHz FM one. The idea is to be able to use the FM filter for AM and ESSB as well instead of filling up two precious filter slots, when what you may want/need are closer filters on the low end (say, 400 and 200 Hz). 73, Thomas M0TRN On 21 September 2012 22:00, Gary Gregory garyvk...@gmail.com wrote: Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 __ 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
Re: [Elecraft] New beta K3 firmware!
*Hi Joe, Thanks for the explanation. I can now 'see' what you meant and it does seem logical. I too have all 5 filter slots in use. 'Learning all the time'...:-) 73's Joe and thanks again. * On 22 September 2012 07:37, Joe Subich, W4TV li...@subich.com wrote: On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: I have to ask, why? Using the FM filter does no widen ESSB or AM ... the bandwidth of those modes is determined by the DSP modulator. The only thing the 8.215 MHz crystal filter does is to provide some additional protection against transmitting the 8.245 MHz image (and according to Wayne, provide some additional rejection of very low level DSP/mixer noise). In any case, the 13 KHz filter is *still* tight enough to eliminate the image - else it could not be used on FM either. In my case, the K3's main RX is full of filters - 13 KHz, 2.8, 1.8, 400 and 200. I can not use AM or ESSB (if I wanted to) without telling the K3 that the 13 KHz filter is really 6 KHz wide. That seems to be a significant headache and makes either FM or AM/ESSB unusable for those who, like me, have a full K3. 73, ... Joe, W4TV On 9/21/2012 5:11 PM, Joshua Mesilane wrote: Originally sent direct, was meant for the list. Actually, we can run up to 8khz bandwidth, with the exception of 16Khz in the FM segment of 10m, and of course the very very low band. The rules do change above 10M though depending on your license class. What this means is you can actually, legally run 6Khz wide AM on HF. I'm looking at the Amateur LCD right now. It's a common misconception that you can only run 3KHz on HF in VK --- VK3XJM 0416039082 j...@zindello.com.au http://www.zindello.com.au/ On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: *Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 * On 22 September 2012 03:10, Joe Subich, W4TV li...@subich.com wrote: How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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 __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:
Re: [Elecraft] New beta K3 firmware!
The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Do you really want to create a 15-kHz wide swath of broadband noise when using ESSB or AM? I don't. That's why I haven't modified the code to allow use of the FM filter for this purpose. I suppose it could be YAMU (yet another menu entry), forcing you to do at least a minimum amount of soul-searching before going broadband :) 73, Wayne N6KR On Sep 21, 2012, at 3:09 PM, Thomas Horsten wrote: Hi Gary, The point is not to widen the SSB but to use the FM crystal filter to limit it. The DSP does the actual shaping of the TX signal which will still be the same width regardless of whether you're using the 6kHz filter or the 12.5kHz FM one. The idea is to be able to use the FM filter for AM and ESSB as well instead of filling up two precious filter slots, when what you may want/need are closer filters on the low end (say, 400 and 200 Hz). 73, Thomas M0TRN On 21 September 2012 22:00, Gary Gregory garyvk...@gmail.com wrote: Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Is not this pedestal present in all modes? What is its level below the transmitter PEP? If it is a problem in AM with the FM filter, why is it not similarly a problem in ESSB (3.0-4.0 KHz modes) with a 6 KHz wide filter? 73, ... Joe, W4TV On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Do you really want to create a 15-kHz wide swath of broadband noise when using ESSB or AM? I don't. That's why I haven't modified the code to allow use of the FM filter for this purpose. I suppose it could be YAMU (yet another menu entry), forcing you to do at least a minimum amount of soul-searching before going broadband :) 73, Wayne N6KR On Sep 21, 2012, at 3:09 PM, Thomas Horsten wrote: Hi Gary, The point is not to widen the SSB but to use the FM crystal filter to limit it. The DSP does the actual shaping of the TX signal which will still be the same width regardless of whether you're using the 6kHz filter or the 12.5kHz FM one. The idea is to be able to use the FM filter for AM and ESSB as well instead of filling up two precious filter slots, when what you may want/need are closer filters on the low end (say, 400 and 200 Hz). 73, Thomas M0TRN On 21 September 2012 22:00, Gary Gregory garyvk...@gmail.com wrote: Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 __ 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 __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
Hi All, I dream one day to see Elecraft building some kind of expansion slot to accomodate more filters. Now all my slots are filled, 200/400/2.1k/2.8k/FM x2 for both RXs so no more free slots for AM or any other filter. I don't care too much abt AM filter but I would like to squeeze two more filters, maybe a 800 and 1.5k filter. Wayne, do you see technical possible to accomodate some sort of optional expansion filter slot? I am sure many of us will welcome such feature. If will ever be such an option but me on alpha/beta testing on top of your list. Tnx and 73 de VE3GNO Daniel From: Gary Gregory garyvk...@gmail.com To: Joe Subich, W4TV li...@subich.com Cc: elecraft@mailman.qth.net Sent: Friday, September 21, 2012 6:19:29 PM Subject: Re: [Elecraft] New beta K3 firmware! *Hi Joe, Thanks for the explanation. I can now 'see' what you meant and it does seem logical. I too have all 5 filter slots in use. 'Learning all the time'...:-) 73's Joe and thanks again. * On 22 September 2012 07:37, Joe Subich, W4TV li...@subich.com wrote: On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: I have to ask, why? Using the FM filter does no widen ESSB or AM ... the bandwidth of those modes is determined by the DSP modulator. The only thing the 8.215 MHz crystal filter does is to provide some additional protection against transmitting the 8.245 MHz image (and according to Wayne, provide some additional rejection of very low level DSP/mixer noise). In any case, the 13 KHz filter is *still* tight enough to eliminate the image - else it could not be used on FM either. In my case, the K3's main RX is full of filters - 13 KHz, 2.8, 1.8, 400 and 200. I can not use AM or ESSB (if I wanted to) without telling the K3 that the 13 KHz filter is really 6 KHz wide. That seems to be a significant headache and makes either FM or AM/ESSB unusable for those who, like me, have a full K3. 73, ... Joe, W4TV On 9/21/2012 5:11 PM, Joshua Mesilane wrote: Originally sent direct, was meant for the list. Actually, we can run up to 8khz bandwidth, with the exception of 16Khz in the FM segment of 10m, and of course the very very low band. The rules do change above 10M though depending on your license class. What this means is you can actually, legally run 6Khz wide AM on HF. I'm looking at the Amateur LCD right now. It's a common misconception that you can only run 3KHz on HF in VK --- VK3XJM 0416039082 j...@zindello.com.au http://www.zindello.com.au/ On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com wrote: *Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 * On 22 September 2012 03:10, Joe Subich, W4TV li...@subich.com wrote: How about allowing use of the FM filter for AM and ESSB transmit? 73, ... Joe, W4TV On 9/21/2012 11:11 AM, Wayne Burdick wrote: Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we can expect... Hi Gordan, Best guess: - improved CW decode at all AGC settings - support for KAT500 antenna switching from the K3 - bug fixes related to remote rig communications (K3/0) There have also been many requests for minor changes, some of which I'll be adding. I can't say yet which ones will make the next cut. 73, Wayne N6KR __ 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 __ 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 -- *Gary* *Start the day off slow, then taper off.* K3 #679 KPA500FT #18 KAT500FT 007 P3 #1629 __ 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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft
Re: [Elecraft] New beta K3 firmware!
Seconded. I would love to have room for an 1.0 (for digimodes) and 200 (weak/QRM CW) filter in addition to my lineup of FM, AM, 2.8, 2.1, and 400. 73, Thomas M0TRN On 22 September 2012 00:38, VE3GNO Daniel yo3...@yahoo.com wrote: Hi All, I dream one day to see Elecraft building some kind of expansion slot to accomodate more filters. Now all my slots are filled, 200/400/2.1k/2.8k/FM x2 for both RXs so no more free slots for AM or any other filter. I don't care too much abt AM filter but I would like to squeeze two more filters, maybe a 800 and 1.5k filter. Wayne, do you see technical possible to accomodate some sort of optional expansion filter slot? I am sure many of us will welcome such feature. If will ever be such an option but me on alpha/beta testing on top of your list. Tnx and 73 de VE3GNO Daniel __ 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
Re: [Elecraft] New beta K3 firmware!
Maybe I'll put the feature in and let you be my guinea pig, Joe. One complaint about noise bandwidth and it comes back out ;) Wayne On Sep 21, 2012, at 4:20 PM, Joe Subich, W4TV wrote: This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. It would seem that the same argument would be made against using the 2.7 or 2.8 KHz filters for CW or digital modes that have a transmit bandwidth of 50 to 100 Hz. Why generate an excessively wide 3 KHz noise pedestal for CW or PSK31/63 or even FSK RTTY (300 Hz required)? This is all academic since it is easy - although very inconvenient - to set FL1 BW to 6.00 with the FM filter to enable AM/ESSB and return it to 13.00 to go back to FM. The real issue is that any user with three narrow filters for SSB and CW/Digital is precluded from using both FM and AM/ESSB without playing games with FL1 BW. 73, ... Joe, W4TV On 9/21/2012 6:40 PM, Wayne Burdick wrote: The 6 kHz filter band-limits the transmit noise originating from the DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB modes. The 15 kHz filter would allow a noise bandwidth over twice as wide. This in-band noise pedestal could be 20-30 dB above the normal transmit noise floor if you were using a lot of mic gain and/or compression. If you were using high power in these modes, your signal would now be much more likely to bring up the receive noise floor at nearby stations. Do you really want to create a 15-kHz wide swath of broadband noise when using ESSB or AM? I don't. That's why I haven't modified the code to allow use of the FM filter for this purpose. I suppose it could be YAMU (yet another menu entry), forcing you to do at least a minimum amount of soul-searching before going broadband :) 73, Wayne N6KR On Sep 21, 2012, at 3:09 PM, Thomas Horsten wrote: Hi Gary, The point is not to widen the SSB but to use the FM crystal filter to limit it. The DSP does the actual shaping of the TX signal which will still be the same width regardless of whether you're using the 6kHz filter or the 12.5kHz FM one. The idea is to be able to use the FM filter for AM and ESSB as well instead of filling up two precious filter slots, when what you may want/need are closer filters on the low end (say, 400 and 200 Hz). 73, Thomas M0TRN On 21 September 2012 22:00, Gary Gregory garyvk...@gmail.com wrote: Joe, I have to ask, why? In VK we have a 3Khz SSB BW written into our LCD's and yet some folks consume 10Khz out here on a net which tears up a considerable amount of spectrum. What advantage do you see to widen the ESSB? Not sure I follow your thoughts here, hence the question Joe. 73 __ 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 __ 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 __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
My feeling is that if you have the 8 pole 2.8 kHz filter installed, the 2.1 kHz filter is probably redundant for vast majority of applications. 73, Scott, N9AA Seconded. I would love to have room for an 1.0 (for digimodes) and 200 (weak/QRM CW) filter in addition to my lineup of FM, AM, 2.8, 2.1, and 400. 73, Thomas M0TRN On 22 September 2012 00:38, VE3GNO Daniel yo3...@yahoo.com wrote: Hi All, I dream one day to see Elecraft building some kind of expansion slot to accomodate more filters. Now all my slots are filled, 200/400/2.1k/2.8k/FM x2 for both RXs so no more free slots for AM or any other filter. I don't care too much abt AM filter but I would like to squeeze two more filters, maybe a 800 and 1.5k filter. Wayne, do you see technical possible to accomodate some sort of optional expansion filter slot? I am sure many of us will welcome such feature. If will ever be such an option but me on alpha/beta testing on top of your list. Tnx and 73 de VE3GNO Daniel __ 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
Re: [Elecraft] New beta K3 firmware!
I couldnt disagree more, I use the 2.1k most followed by the 1.8k in ssb. I never see/hear a need to go wider than 2.1k other than to appreciate Johnny Broadcasters new $1000 studio mic. I use the 2.8k std req for TX. On 22/09/2012 1:59, Scott Manthe wrote: My feeling is that if you have the 8 pole 2.8 kHz filter installed, the 2.1 kHz filter is probably redundant for vast majority of applications. 73, Scott, N9AASeconded. I would love to have room for an 1.0 (for digimodes) and 200 (weak/QRM CW) filter in addition to my lineup of FM, AM, 2.8, 2.1, and 400. 73, Thomas M0TRN On 22 September 2012 00:38, VE3GNO Danielyo3...@yahoo.com wrote: Hi All, I dream one day to see Elecraft building some kind of expansion slot to accomodate more filters. Now all my slots are filled, 200/400/2.1k/2.8k/FM x2 for both RXs so no more free slots for AM or any other filter. I don't care too much abt AM filter but I would like to squeeze two more filters, maybe a 800 and 1.5k filter. Wayne, do you see technical possible to accomodate some sort of optional expansion filter slot? I am sure many of us will welcome such feature. If will ever be such an option but me on alpha/beta testing on top of your list. Tnx and 73 de VE3GNO Daniel __ 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 __ 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
Re: [Elecraft] New beta K3 firmware!
I would use the FM filter for AM receive and the AM filter for ESSB receive. I used to do it all the time for listening to shortwave broadcasts on my JRC NRD-535. If the are no adjacent channel signals, you get full fidelity. Don NA6Z K3 KPA500 On Fri, Sep 21, 2012 at 2:57 PM, Adrian vk4...@bigpond.com wrote: I see Joe's point exactly to enable the 13k filter for more diverse usage, which would suit me perfectly instead of 'tricking' the K3 or am/fm use not just FM. The ESSB is just another thing it does, but the AM is what I want also. __ 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
Re: [Elecraft] New beta K3 firmware!
Blush, I just read the other thread with the same subject line. I gotta stop thinking IF filters. Yep, you'd need to play with the DSP bandwidth too. On Fri, Sep 21, 2012 at 9:11 PM, Don Putnick don.putnick.n...@gmail.comwrote: I would use the FM filter for AM receive and the AM filter for ESSB receive. I used to do it all the time for listening to shortwave broadcasts on my JRC NRD-535. If the are no adjacent channel signals, you get full fidelity. Don NA6Z K3 KPA500 On Fri, Sep 21, 2012 at 2:57 PM, Adrian vk4...@bigpond.com wrote: I see Joe's point exactly to enable the 13k filter for more diverse usage, which would suit me perfectly instead of 'tricking' the K3 or am/fm use not just FM. The ESSB is just another thing it does, but the AM is what I want also. __ 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
