Re: [Elecraft] [K3] Filters for mixed JT65 and JT9 HF
Bob, On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. I believe your measurements are incorrect. Using an XG3 at -73 dBm for a signal source and an audio spectrum analyzer connected to the Line Out of K3 S/N 622 with an *unmodified* DPS board and original transformers on the KIO3, the audio is -4 dB at 300 Hz/-15 dB at 200 Hz and -5dB at 4000 Hz/-14 dB a 4200 Hz. Put another way, the measured -6dB points are 263 - 4016 Hz (BW[6 dB] = 3753 Hz) and measured -10dB points are 222 - 4142 Hz (BW [10dB] = 3920 Hz). Those numbers are close enough to 4 KHz for me to be adamant that the K3 works very well in broadband mode with either the FM or AM filters in WSJT-X. Moving the LF limit down to 50 Hz as in the case of SSB isn't going to make a significant difference because the transformers have a good deal of effect there. Duplicating the LF measurement in SSB with LO=0.00 moves the -10dB point down by only 50 Hz (170 Hz). That the K3 is down less than 6dB at 4KHz is the key - could it be a bit better, yes but at what cost? Audio frequencies below 300 Hz have little value for WSJT-X receive (they're more than -1KHz from the old 1270 Hz 0 dF) and even with the roll off WSJT-X performs very well at -200 Hz. Split handles any transmit bandwidth issues in any case. 73, ... Joe, W4TV On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. This has also been confirmed by Lyle himself, who agrees that widening the bandwidth 400-600 HZ would be a good thing to do. I've also confirmed this with two other K3 owners. If your DSP response is wider then consider yourself lucky because others don't experience the same thing. 73, Bob, WB4SON On Mon, Oct 7, 2013 at 4:51 PM, Joe Subich, W4TV li...@subich.com wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. It is simply a matter of adjusting the High and Low cut frequencies to 200/4200 or shift/Width to 2200/4000. I have been doing that ever since K1JT offered me a pre-release look at the wideband decoding support in WSJT-X with no issues other than some CAT problems with the interface to CI-V Commander from DXLab Suite which K1JT and AA6YQ resolved quite quickly. 73, ... Joe, W4TV On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've seen is that WSJT-X does nothing to make sure the K3 is in the Split mode, it just assumes it is. 73, Bob, WB4SON __**__**__ Elecraft mailing list Home: http://mailman.qth.net/**mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.**net 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/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.**net 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] [K3] Filters for mixed JT65 and JT9 HF
I wonder if someone who has significant WSJT-X experience would like to pontificate of the real benefit of squeezing out another KHz of bandwidth out? It seems to me on HF one is simply inviting in more signals which can potentially de-sense the RX. That wipes out the benefit of the weak signal mode. I really doubt these band segment is devoid of users of different high power modes. Maybe WSJT-X is magic 73 de Brian/K3KO On 10/8/2013 15:34, Joe Subich, W4TV wrote: Bob, On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. I believe your measurements are incorrect. Using an XG3 at -73 dBm for a signal source and an audio spectrum analyzer connected to the Line Out of K3 S/N 622 with an *unmodified* DPS board and original transformers on the KIO3, the audio is -4 dB at 300 Hz/-15 dB at 200 Hz and -5dB at 4000 Hz/-14 dB a 4200 Hz. Put another way, the measured -6dB points are 263 - 4016 Hz (BW[6 dB] = 3753 Hz) and measured -10dB points are 222 - 4142 Hz (BW [10dB] = 3920 Hz). Those numbers are close enough to 4 KHz for me to be adamant that the K3 works very well in broadband mode with either the FM or AM filters in WSJT-X. Moving the LF limit down to 50 Hz as in the case of SSB isn't going to make a significant difference because the transformers have a good deal of effect there. Duplicating the LF measurement in SSB with LO=0.00 moves the -10dB point down by only 50 Hz (170 Hz). That the K3 is down less than 6dB at 4KHz is the key - could it be a bit better, yes but at what cost? Audio frequencies below 300 Hz have little value for WSJT-X receive (they're more than -1KHz from the old 1270 Hz 0 dF) and even with the roll off WSJT-X performs very well at -200 Hz. Split handles any transmit bandwidth issues in any case. 73, ... Joe, W4TV On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. This has also been confirmed by Lyle himself, who agrees that widening the bandwidth 400-600 HZ would be a good thing to do. I've also confirmed this with two other K3 owners. If your DSP response is wider then consider yourself lucky because others don't experience the same thing. 73, Bob, WB4SON On Mon, Oct 7, 2013 at 4:51 PM, Joe Subich, W4TV li...@subich.com wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. It is simply a matter of adjusting the High and Low cut frequencies to 200/4200 or shift/Width to 2200/4000. I have been doing that ever since K1JT offered me a pre-release look at the wideband decoding support in WSJT-X with no issues other than some CAT problems with the interface to CI-V Commander from DXLab Suite which K1JT and AA6YQ resolved quite quickly. 73, ... Joe, W4TV On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've seen is that WSJT-X does nothing to make sure the K3 is in the Split mode, it just assumes it is. 73, Bob, WB4SON __**__**__ Elecraft mailing list Home: http://mailman.qth.net/**mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.**net 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/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.**net 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] [K3] Filters for mixed JT65 and JT9 HF
I wonder if someone who has significant WSJT-X experience would like to pontificate of the real benefit of squeezing out another KHz of bandwidth out? Certainly no expert here, but the slightly wider bandwidth does allow a WSJT-X user to copy the full suggested sub-bands for both JT65 and JT9 at the same time. While, to your point, that might not be the wisest thing to do on 20 meters during a contest when folks tend to ignore the suggested band plans, many times on the WARC bands there are no strong signals to worry about. So the bottom line is when it is appropriate, you can use it, and when it isn't you can always shift to a more narrow roofing filter and focus on one mode vs the other. It's simply an option. The ability of JT65 and JT9 to decode signals below the noise level is the closest thing to magic that I've come across in my ham experience, allowing extremely low power communication to be accomplished with sub-optimal antennas. I can work Australia, half way around the world, regularly with 0.5 watts of output But it isn't magic, just applied mathematics. And there is no denying there is something almost magical about decoding a signal that you can't even hear. 73, Bob, WB4SON __ 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] [K3] Filters for mixed JT65 and JT9 HF
On Tue, Oct 8, 2013 at 9:35 AM, Bob wb4...@gmail.com wrote: But it isn't magic, just applied mathematics. To most of us, that is considered magic! Frank KG6EYC -- CW: NAQCC #6554 | SKCC #10435 | FISTS #16155 | SOC #1038 | FPQRP #3186 Digital: FHC #4224 | 30MDG #6370 | DMC #5698 Gear: K3 #7164 | KX3 #1787 __ 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] [K3] Filters for mixed JT65 and JT9 HF
It seems to me on HF one is simply inviting in more signals which can potentially de-sense the RX. That wipes out the benefit of the weak signal mode. I really doubt these band segment is devoid of users of different high power modes. Yes and no ... there are occasional issues with a high power (or local medium power) user. However, when the K3 is run with AGC off there is typically 70 to 80 dB of dynamic range between the no signal band noise floor and an S9+20 dB signal. As long as the sound card does not clip on the loudest signal - or the loudest signal does not drive the K3 into the hardware AGC range - there will not be a problem. If there is a signal that drives the K3 into hardware AGC or is loud enough to cause the sound card to clip, one can always dial in a narrow IF filter unless the interfering signal is on top of the desired signal. In that regard JT65/JT9 are no different than CW or RTTY ... use the tools your transceiver gives you. 73, ... Joe, W4TV On 10/8/2013 11:54 AM, Brian Alsop wrote: I wonder if someone who has significant WSJT-X experience would like to pontificate of the real benefit of squeezing out another KHz of bandwidth out? It seems to me on HF one is simply inviting in more signals which can potentially de-sense the RX. That wipes out the benefit of the weak signal mode. I really doubt these band segment is devoid of users of different high power modes. Maybe WSJT-X is magic 73 de Brian/K3KO On 10/8/2013 15:34, Joe Subich, W4TV wrote: Bob, On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. I believe your measurements are incorrect. Using an XG3 at -73 dBm for a signal source and an audio spectrum analyzer connected to the Line Out of K3 S/N 622 with an *unmodified* DPS board and original transformers on the KIO3, the audio is -4 dB at 300 Hz/-15 dB at 200 Hz and -5dB at 4000 Hz/-14 dB a 4200 Hz. Put another way, the measured -6dB points are 263 - 4016 Hz (BW[6 dB] = 3753 Hz) and measured -10dB points are 222 - 4142 Hz (BW [10dB] = 3920 Hz). Those numbers are close enough to 4 KHz for me to be adamant that the K3 works very well in broadband mode with either the FM or AM filters in WSJT-X. Moving the LF limit down to 50 Hz as in the case of SSB isn't going to make a significant difference because the transformers have a good deal of effect there. Duplicating the LF measurement in SSB with LO=0.00 moves the -10dB point down by only 50 Hz (170 Hz). That the K3 is down less than 6dB at 4KHz is the key - could it be a bit better, yes but at what cost? Audio frequencies below 300 Hz have little value for WSJT-X receive (they're more than -1KHz from the old 1270 Hz 0 dF) and even with the roll off WSJT-X performs very well at -200 Hz. Split handles any transmit bandwidth issues in any case. 73, ... Joe, W4TV On 10/8/2013 10:28 AM, Bob wrote: Hi Joe, I disagree with your adamant public statement as the -10 dB points even with the filter center shifted up to 2000 Hz are at 300 Hz and 3800 Hz -- That's 3500 Hz edge to edge, not 4000. This has also been confirmed by Lyle himself, who agrees that widening the bandwidth 400-600 HZ would be a good thing to do. I've also confirmed this with two other K3 owners. If your DSP response is wider then consider yourself lucky because others don't experience the same thing. 73, Bob, WB4SON On Mon, Oct 7, 2013 at 4:51 PM, Joe Subich, W4TV li...@subich.com wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. It is simply a matter of adjusting the High and Low cut frequencies to 200/4200 or shift/Width to 2200/4000. I have been doing that ever since K1JT offered me a pre-release look at the wideband decoding support in WSJT-X with no issues other than some CAT problems with the interface to CI-V Commander from DXLab Suite which K1JT and AA6YQ resolved quite quickly. 73, ... Joe, W4TV On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've
Re: [Elecraft] [K3] Filters for mixed JT65 and JT9 HF
Hi Thanks for the reply Yes I can transmit using the split options. For 2 reasons I would like different approach with a wideband TX. First of all I am interfacing through HRD. That way the split are not implemented to my understanding. Then I really like to know exactly where i transmit. Using the split the only indication I get is that the frequency in the b VFO. But i am not able to see if i am actually doing TX on A or B VFO during a TX cycle. 73 de OZ1BZJ Michael -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579667.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] [K3] Filters for mixed JT65 and JT9 HF
Hi Michael, when in Split mode you always TX on the VFO B frequency. Besides this there is a small arrow either above or below the TX symbol on the display pointing to the VFO choosen for transmit. ;-) 73, Olli - DH8BQA - Original Message - From: Michael Jensen m...@the-jensen-dk.net To: elecraft@mailman.qth.net Sent: Monday, October 07, 2013 10:11 PM Subject: Re: [Elecraft] [K3] Filters for mixed JT65 and JT9 HF Hi Thanks for the reply Yes I can transmit using the split options. For 2 reasons I would like different approach with a wideband TX. First of all I am interfacing through HRD. That way the split are not implemented to my understanding. Then I really like to know exactly where i transmit. Using the split the only indication I get is that the frequency in the b VFO. But i am not able to see if i am actually doing TX on A or B VFO during a TX cycle. 73 de OZ1BZJ Michael -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579667.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 - E-Mail ist virenfrei. Von AVG überprüft - www.avg.de Version: 2014.0.4142 / Virendatenbank: 3604/6727 - Ausgabedatum: 06.10.2013 __ 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] [K3] Filters for mixed JT65 and JT9 HF
Yes I can transmit using the split options. For 2 reasons I would like different approach with a wideband TX. Unfortunately the K3 *can not* do wideband TX ... the DSP modulator is limited to 200 - 2800 Hz when in DATA mode. There is no alternative as ESSB modulation is not supported in DATA mode - regardless of which filters are installed. First of all I am interfacing through HRD. That way the split are not implemented to my understanding. Then you need to put pressure on the developers of HRD to fix the problems with split so it operates correctly. The alternative is to use narrow band with WSJT-X - disable split (untick Split TX in Config) and leave the default frequencies as they are for JT65A. Then click the +2 KHz box to QSY both transmit and receive up 2 KHz for JT9. It is possible to monitor the entire 4 KHz in wideband receive then simply select +2 KHz to QSY when operating JT9. 73, ... Joe, W4TV On 10/7/2013 4:11 PM, Michael Jensen wrote: Hi Thanks for the reply Yes I can transmit using the split options. For 2 reasons I would like different approach with a wideband TX. First of all I am interfacing through HRD. That way the split are not implemented to my understanding. Then I really like to know exactly where i transmit. Using the split the only indication I get is that the frequency in the b VFO. But i am not able to see if i am actually doing TX on A or B VFO during a TX cycle. 73 de OZ1BZJ Michael -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579667.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 __ 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] [K3] Filters for mixed JT65 and JT9 HF
Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've seen is that WSJT-X does nothing to make sure the K3 is in the Split mode, it just assumes it is. 73, Bob, WB4SON __ 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] [K3] Filters for mixed JT65 and JT9 HF
On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. It is simply a matter of adjusting the High and Low cut frequencies to 200/4200 or shift/Width to 2200/4000. I have been doing that ever since K1JT offered me a pre-release look at the wideband decoding support in WSJT-X with no issues other than some CAT problems with the interface to CI-V Commander from DXLab Suite which K1JT and AA6YQ resolved quite quickly. 73, ... Joe, W4TV On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've seen is that WSJT-X does nothing to make sure the K3 is in the Split mode, it just assumes it is. 73, Bob, WB4SON __ 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] [K3] Filters for mixed JT65 and JT9 HF
Hi Olli Thanks for the reply Well yes the SW tells my radio that it should TX on the B VFO. But then again it is SW. A piece of programming that should work on 10 of combinations of different PC HW and several OS. Nothing that you could test in all combinations. 15 years of working with production and the related automation involving a lot of SW have learned me to be sceptical. IT mostly works yes, but sometime not. Right now i have no indication that it works or not. My K3 do indeed display an arrow pointing toward the A VFO, but it do dot change to B VFO during TX despite the fact that TX are on the B VFO frequency. So the arrow on the K3 seems not to change when a VFO B TX are initiated via CAT. Before we get there, yes i know that there are plenty of SW (Firmware) in the K3 as well. But the number of input possible and the number of configurations are limited and there for possible to test and have been very well tested by Elecraft and the K3 community. I am sure the WSJT-X are a very well designed piece of SW and i am indeed very happy using it. I just like to be sure where i put an signal on the air. 73 de OZ1BZJ Michael . Den 07-10-2013 22:28, Oliver Dröse skrev: Hi Michael, when in Split mode you always TX on the VFO B frequency. Besides this there is a small arrow either above or below the TX symbol on the display pointing to the VFO choosen for transmit. ;-) 73, Olli - DH8BQA - Original Message - From: Michael Jensen m...@the-jensen-dk.net To: elecraft@mailman.qth.net Sent: Monday, October 07, 2013 10:11 PM Subject: Re: [Elecraft] [K3] Filters for mixed JT65 and JT9 HF __ 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] [K3] Filters for mixed JT65 and JT9 HF
Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. Correction ... 200 to 4200 Hz 73, ... Joe, W4TV On 10/7/2013 4:51 PM, Joe Subich, W4TV wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Absolutely *not* true ... I regularly receive 200 to 2400 Hz in DATA A with the FM (or AM) filter. It is simply a matter of adjusting the High and Low cut frequencies to 200/4200 or shift/Width to 2200/4000. I have been doing that ever since K1JT offered me a pre-release look at the wideband decoding support in WSJT-X with no issues other than some CAT problems with the interface to CI-V Commander from DXLab Suite which K1JT and AA6YQ resolved quite quickly. 73, ... Joe, W4TV On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. Lyle is aware of this issue and it is on his list to work on in the future. And even if you are in Split mode, rest assured that you know exactly where you are transmitting -- on the exact audio offset indicated on the display. Operating Split is the way to go. The only drawback I've seen is that WSJT-X does nothing to make sure the K3 is in the Split mode, it just assumes it is. 73, Bob, WB4SON __ 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] [K3] Filters for mixed JT65 and JT9 HF
I believe that figure of 3400 Hz is the AUDIO bandwidth which is equivalent to an AM bandwidth twice that, or 6.8 kHz. If I am correct, then you can most certainly take advantage of your 6 kHz AM filter which will limit your broadcast audio bandwidth to 3.0 kHz. The 15 kHz filter will get you an extra 400 Hz.of audio, but is probably not practical due to the excessive bandwidth. Save that one for FM. 73, Charlie k3ICH On 10/7/2013 4:51 PM, Joe Subich, W4TV wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. __ 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] [K3] Filters for mixed JT65 and JT9 HF
If I am correct, then you can most certainly take advantage of your 6 kHz AM filter which will limit your broadcast audio bandwidth to 3.0 kHz. That only applies in AM transmit because of the double sideband nature of AM. If you use the 6 KHZ filter for SSB/ESSB/DATA receive, the entire filter passband is used for one sideband ... one edge of the filter is placed at 50 Hz in SSB/ESSB or 200 Hz in DATA and the other edge of the filter is 6+ KHz away from the carrier ... more than enough for the 4200 Hz HF limit in the DSP. 73, ... Joe, W4TV On 10/7/2013 7:31 PM, Charlie T, K3ICH wrote: I believe that figure of 3400 Hz is the AUDIO bandwidth which is equivalent to an AM bandwidth twice that, or 6.8 kHz. If I am correct, then you can most certainly take advantage of your 6 kHz AM filter which will limit your broadcast audio bandwidth to 3.0 kHz. The 15 kHz filter will get you an extra 400 Hz.of audio, but is probably not practical due to the excessive bandwidth. Save that one for FM. 73, Charlie k3ICH On 10/7/2013 4:51 PM, Joe Subich, W4TV wrote: On 10/7/2013 4:39 PM, Bob wrote: Just be aware that current DSP firmware in the K3 limits the receive bandwidth to something around 3400 Hz. So even if you have a wider filter, like the 6 KHz AM filter, you will not be able to utilize the full 4 KHz bandwidth of WSJT-X for JT65/MT9 modes. __ 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] [K3] Filters for mixed JT65 and JT9 HF
BUT, The filter that must be specified for DATA mode TX is the 2.7 (or 2.8) kHz filter. You cannot use the wider filters for DATA mode transmit - the firmware prevents it (unless you lie to the K3 about which filter is which width). You can use a wider filter for receive, but that does not help transmit. The transmit audio width is fixed by the DSP, so a wider filter will not increase that limit. What is wrong with using the split arrangement that is provided by the computer software - no work-arounds needed, it makes everything seamless, and can automatically put the K3 into split mode. 73, Don W3FPR On 10/7/2013 7:31 PM, Charlie T, K3ICH wrote: I believe that figure of 3400 Hz is the AUDIO bandwidth which is equivalent to an AM bandwidth twice that, or 6.8 kHz. If I am correct, then you can most certainly take advantage of your 6 kHz AM filter which will limit your broadcast audio bandwidth to 3.0 kHz. The 15 kHz filter will get you an extra 400 Hz.of audio, but is probably not practical due to the excessive bandwidth. Save that one for FM. __ 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] [K3] Filters for mixed JT65 and JT9 HF
Hi I am right now using this exact setup with WSJTX. I do get the about 400Hz to 4200 on the waterfall, but TX are an issue. As i guess the K3 transmit through the 2,8 Khz. filter when ever i try to work a JT9 QSO above 3,0 Khz on the waterfall i do not see any audio output. I have been looking for a way to TX through the AM filter but have not found the way. Any hints please ? Thanks in advance 73 De OZ1BZJ Michael -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579617.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] [K3] Filters for mixed JT65 and JT9 HF
I don't have a solution for wideband transmit (since I don't own a K3) but there is a simple fix: Run split. That way, the software will keep the transmit close to 1500 Hz by offsetting the QRG automatically. You can use the full receive bandwidth and the software will take care of keeping the transmit in range. I use this on my K2 and it is great. You just have to set it in the WSJT-X settings and make sure the K3 is set in split mode. On the K2, split is reset each time the transceiver is power cycled so I have to be sure to set it back on split mode. 73, David, K2MUN On 10/6/13 3:41 PM, Michael Jensen [via Elecraft] wrote: Hi I am right now using this exact setup with WSJTX. I do get the about 400Hz to 4200 on the waterfall, but TX are an issue. As i guess the K3 transmit through the 2,8 Khz. filter when ever i try to work a JT9 QSO above 3,0 Khz on the waterfall i do not see any audio output. I have been looking for a way to TX through the AM filter but have not found the way. Any hints please ? Thanks in advance 73 De OZ1BZJ Michael If you reply to this email, your message will be added to the discussion below: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579617.html To unsubscribe from [K3] Filters for mixed JT65 and JT9 HF, click here http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=7578942code=ZGJlcmtsZXkyQGdtYWlsLmNvbXw3NTc4OTQyfDEyMTM3NzY1MDU=. NAML http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewerid=instant_html%21nabble%3Aemail.namlbase=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespacebreadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942p7579625.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] [K3] Filters for mixed JT65 and JT9 HF
not sure what your TX problem is Michael? I am running WSJTX v1.2.1, r3587 I am using the K3's AM filter for RX so I can run WSJTX in dual mode I am running WSJTX using WSJTX's CAT through DXLabs Commander I just tested my TX all the way from 200 up through 4400 and I can tx with the full audio out of 5 bars and no reduction in power out also I am running a SignaLink USB, but that would have anything to do with it because the audio in WSJTX is always between 1500 – 2000 Hz. when in dual mode. to quote the help notes in WSJTX Version 1.2 Aug. 16, 2013: Pages 11 12#13. Note that most SSB transceivers have a fixed Tx filter that will not pass audio frequencies higher than about 2700 Hz. WSJT-X v1.1 takes care of this by using Split mode, receiving with VFO A and transmitting with VFO B. The Tx dial frequency (VFO B) is offset in 500 Hz steps, and the generated audio frequency is adjusted so that it always falls in the range 1500 – 2000 Hz. With CAT and Split Tx enabled on the configuration screen and your transceiver set to Split mode, frequency control will be handled automatically. On 10/6/2013 2:41 PM, Michael Jensen wrote: Hi I am right now using this exact setup with WSJTX. I do get the about 400Hz to 4200 on the waterfall, but TX are an issue. As i guess the K3 transmit through the 2,8 Khz. filter when ever i try to work a JT9 QSO above 3,0 Khz on the waterfall i do not see any audio output. I have been looking for a way to TX through the AM filter but have not found the way. Any hints please ? Thanks in advance 73 De OZ1BZJ Michael -- GB 73 K5OAI Sam Morgan __ 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] [K3] Filters for mixed JT65 and JT9 HF
I am considering purchase of a K3 (I own a K2). One application is the new mixed JT65-JT9 HF mode. Possible accessories are: -KFL3A-6K 6 kHz AM / ESSB, 8-pole filter (to allow full band mixed waterfall) -KTCXO3-1 TCXO (0.1 ppm typ) High Stability Ref. Osc. (to provide stability especially as required by JT9) Are these needed and reasonable choices? 73, David, K2MUN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filters-for-mixed-JT65-and-JT9-HF-tp7578942.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] [K3] Filters for mixed JT65 and JT9 HF
I would defiantly add the AM filter, works great for dual JT65 + JT9 wf I do not have or need the TCXO, the stock K3 works fine for stability the timing with a pgm like NTP is more of a key factor for QSO's ymmv On 9/14/2013 10:10 AM, dberkley wrote: I am considering purchase of a K3 (I own a K2). One application is the new mixed JT65-JT9 HF mode. Possible accessories are: -KFL3A-6K 6 kHz AM / ESSB, 8-pole filter (to allow full band mixed waterfall) -KTCXO3-1 TCXO (0.1 ppm typ) High Stability Ref. Osc. (to provide stability especially as required by JT9) Are these needed and reasonable choices? 73, David, K2MUN -- GB 73 K5OAI Sam Morgan __ 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] [K3] Filters for mixed JT65 and JT9 HF
Agree with Sam fully. I have the AM filter and currently work both modes easily. I do not have the TXCO, however it's on my future upgrade list. On Saturday, September 14, 2013, Sam Morgan wrote: I would defiantly add the AM filter, works great for dual JT65 + JT9 wf I do not have or need the TCXO, the stock K3 works fine for stability the timing with a pgm like NTP is more of a key factor for QSO's ymmv On 9/14/2013 10:10 AM, dberkley wrote: I am considering purchase of a K3 (I own a K2). One application is the new mixed JT65-JT9 HF mode. Possible accessories are: -KFL3A-6K 6 kHz AM / ESSB, 8-pole filter (to allow full band mixed waterfall) -KTCXO3-1 TCXO (0.1 ppm typ) High Stability Ref. Osc. (to provide stability especially as required by JT9) Are these needed and reasonable choices? 73, David, K2MUN -- GB 73 K5OAI Sam Morgan __**__**__ Elecraft mailing list Home: http://mailman.qth.net/**mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://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] [K3] Filters for mixed JT65 and JT9 HF
Sam's advice is correct ... however, the FM filter is a suitable alternative to the AM filter if you plan to do/try FM on the top end of 10 Meters, 6 meters or install the internal 2 m transverter at some point. Either the FM or AM filters will provide a 4 KHz wide waterfall (200 - 4200 Hz) with the current WSJT-X software. The high stability TCXO is most certainly not needed - drift over one minute at HF just isn't a factor. 73, ... Joe, W4TV On 9/14/2013 11:20 AM, Sam Morgan wrote: I would defiantly add the AM filter, works great for dual JT65 + JT9 wf I do not have or need the TCXO, the stock K3 works fine for stability the timing with a pgm like NTP is more of a key factor for QSO's ymmv On 9/14/2013 10:10 AM, dberkley wrote: I am considering purchase of a K3 (I own a K2). One application is the new mixed JT65-JT9 HF mode. Possible accessories are: -KFL3A-6K 6 kHz AM / ESSB, 8-pole filter (to allow full band mixed waterfall) -KTCXO3-1 TCXO (0.1 ppm typ) High Stability Ref. Osc. (to provide stability especially as required by JT9) Are these needed and reasonable choices? 73, David, K2MUN __ 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
