[Elecraft] Wanted XV144 transverter
Hello all: I am looking for XV144 transverter. Built, unbuilt, started not finished, or not working. Let me know what you got. I pay with Paypal only. E mail me at w0...@yahoo.com Thank you, Bill Hudson, W0WFH Linn, Mo. __ 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] sending computer morse?
i want to send morse from my computer to my k1 is there a way i can do that? i have a mac asistance welcome -- View this message in context: http://elecraft.365791.n2.nabble.com/sending-computer-morse-tp7563309.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] Fwd: sending computer morse?
Greg, A good friend of mine K1BX helps build these interface units. Set the K1 to straight key mode and hook up this keyer to your computer. Can't help you with the software but there's got to be some freeware logging programs out there that can key this. http://www.k1el.com/ 73, Myron Not sent from my PC Begin forwarded message: From: greg fripp frippg...@mac.com Date: September 26, 2012, 5:53:37 AM MDT To: elecraft@mailman.qth.net Subject: [Elecraft] sending computer morse? i want to send morse from my computer to my k1 is there a way i can do that? i have a mac asistance welcome -- View this message in context: http://elecraft.365791.n2.nabble.com/sending-computer-morse-tp7563309.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] Fwd: sending computer morse?
Most of the free and non-free programs have support. Look for the WinKey setting. -- *Michael D. Adams* (N1EN) Poquonock, Connecticut | m...@n1en.org On Wed, Sep 26, 2012 at 8:24 AM, Myron Schaffer magl...@me.com wrote: Greg, A good friend of mine K1BX helps build these interface units. Set the K1 to straight key mode and hook up this keyer to your computer. Can't help you with the software but there's got to be some freeware logging programs out there that can key this. http://www.k1el.com/ 73, Myron __ 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 - Filter suggestions for new builder
I originally chose the 8-pole filters thinking the steeper skirts would be useful should I ever take the radio into a dense RF environment like it is in the lower-48 states. MY experience with CW indicated 400-Hz was adequate as I could narrow this down with the DSP filter. I chose the 2.8 KHz SSB filter and 13-KHz filter for FM use with a VHF transverter. One note is that changing filters on the main board requires removal of the sub-Rx so probably good to figure out what you want from the beginning. I installed a 2.8 and 13 KHz filter in my sub-Rx, thinking I could get the full bandwidth in audio to use with soundcards for SDR sw. But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. I have thought of adding a 1.8 or 2.1 KHz filter for working tough SSB signals. I do try running the DSP down to that bandwidth but find that the DSP audio distortion sometimes is counterproductive to hearing weak SSB. I do not have trouble with dense local QRM up here in Alaska. I wonder if the roofing filters are easier to listen thru than the DSP filter? I did not install a second 400-Hz filter in the sub-Rx and that may be an error when I start running dual-pol diversity reception for CW-eme. At present, I only run diversity Rx in USB since I am running JT-65 on 2m-eme. I am testing a new program called MAP65 which maps and decodes all JT65 signals in a 90-KHz window. This covers 144.090-144.170 digital eme sub-band, nicely. Someday it would be interesting to set up a crossed dipole on 20, 15 , or 10m and listen in diversity Rx. Crossed horizontal dipoles actually sample different polarities of refracted HF. According to KL7AJ all HF is converted to circular polarity upon refraction in the ionosphere (see the recent article in QST by him). 73, Ed - KL7UW __ 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 - Filter suggestions for new builder
Your choices of filter are very good. I like the idea of a 1.8 filter for tight sub You don't need the 2.8 sub, stay with the stock. Your CW choice is excellent because the K3 can go tighter digitally. You don't need a wide FM filter unless you are going on VHF UHF FM with transverters. You don't need an AM filter. I have it, don't use it. Waste for me. My 2 cents. Bill N2WL On Sep 26, 2012, at 12:00 PM, elecraft-requ...@mailman.qth.net wrote: [Elecraft] K3 - Filter suggestions for new builder __ 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 - Filter suggestions for new builder
Ed, I would think you are hearing the results of a narrow passband rather than DSP audio distortion. I say that because in all cases with the K3, it is the DSP that determines the filter width rather than the roofing filter. What I am saying is that even if you put in a 1.8k filter, SSB at a 1.8k width will sound the same as it does right now using only the DSP. I trust you are using the HI-Cut to narrow the receive passband, leaving the LO-Cut set to the 200 to 300 Hz range rather than trying to use the Width and Shift controls. If you are using Shift and Width, you have to re-position Shift with every change in Width or the speech will become more distorted. Using HI-Cut, you just reduce the high frequency end - no other change is required. 73, Don W3FPR On 9/26/2012 1:35 PM, Edward R Cole wrote: I have thought of adding a 1.8 or 2.1 KHz filter for working tough SSB signals. I do try running the DSP down to that bandwidth but find that the DSP audio distortion sometimes is counterproductive to hearing weak SSB. I do not have trouble with dense local QRM up here in Alaska. I wonder if the roofing filters are easier to listen thru than the DSP 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] WANT: K3
Looking for a mint K3 from original, non-smoking owner; factory preferred. Please email off list with details, including asking price. 73 John W4II fraz1 at bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Fwd: sending computer morse?
You can do it cheaper by building a simple transistor circuit that allows you computer to key the radio via the computer's RS232 serial port. Not quite as good as a Winkeyer, but gets you on air very quickly so you can have a play. 73, Matt VK2ACL On 26/09/2012, at 10:24 PM, Myron Schaffer magl...@me.com wrote: Greg, A good friend of mine K1BX helps build these interface units. Set the K1 to straight key mode and hook up this keyer to your computer. Can't help you with the software but there's got to be some freeware logging programs out there that can key this. http://www.k1el.com/ 73, Myron Not sent from my PC Begin forwarded message: From: greg fripp frippg...@mac.com Date: September 26, 2012, 5:53:37 AM MDT To: elecraft@mailman.qth.net Subject: [Elecraft] sending computer morse? i want to send morse from my computer to my k1 is there a way i can do that? i have a mac asistance welcome -- View this message in context: http://elecraft.365791.n2.nabble.com/sending-computer-morse-tp7563309.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 __ 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] SDR with KX3? IF-PSDR use?
With all the talk of trying to get KX3 working with NaP3... I have to ask.What about using IF-PSDR? I use IF-PSDR on my K3 with LP-Pan/Bridge and like it.I tried NaP3 last winter (when I was active before good weather) and I found I did not like it. That's me, I guess. Anyone know why the attention is only on the one software, it seems?I think initially I was hearing about HDSDR (I am right?) back in the early talk on KX3, but don't about it all now, that I can discern or recall. tnxBrienToronto __ 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] SWL
Wayne, Eric and crew, Soo, would it be possible to add another band that would be for SWL only? That way the standard bands would no get jumbled. Also, how about a menu item that would restrict transmitting according to you license. In other words a Tech, General and Extra setting to keep us short term memory guys out of trouble?? Thanks, Clint KI6SSN __ 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] an alternative to the standard computer mouse
While I don't YET have SDR running on my KX3,I have been running SDR software on my K3 and my Flex 3000 for some time now. At one time I worked in an office dealing with workplace injuries, and part of that was injury claims stemming fromergonomic issues in workplace computer use.We had a lot of devices come and go as ideas for improvements on keyboards and mice,to be honest many of them were not a great idea or solution, IMHO. However, in my current office we still deal with ergonomic complaints. We have had a couple persons try something called the Contour Roller Mouse, and after some time I have managed to borrow onefor the shack. Quite simply this uses a cylindrical bar that rolls around as well as moves back and forth to move the mouse-pointer up/down and sideways.Standard mouse buttons and central rolling wheel as well. I think it is pretty good product from what I can see so far, and since the keyboard is not necessary to be on the desk when doing the SDR stuff...thecontrol of the SDR software via the Roller Mouse is nice.I've used wireless keyboards and wireless mice for some time now to keep the operating desk clear of what does not need to be there all of the time.I have used a Logikey wireless mouse with assignable buttons as well.It seems the Roller Mouse (which does use a USB cable) could sit under the monitor stand (if you don't have the monitor on the wall or on a shelf) to keep the desk real estate managed. Anyhow, if you want to look. They even offer 30 day trials. Maybe this is of interest to some people who DO have some mobility or mouse issues.FWIW. No interest on my behalf, no commission etc. http://ergo.contour-design.com/ CiaoBrienToronto 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] K3 - Filter suggestions for new builder
On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? 73, Dale WA8SRA __ 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 - Filter suggestions for new builder
Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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 - Filter suggestions for new builder
Hello Don, Thanks for the quick response. I was just going through the K3 manual and KE7X's excellent book, but haven't seen any reference to that. For general ham radio operation I don't see it as a limitation, but it's a bit disappointing that the FM filters that will arrive tomorrow along with the 2nd RX, won't provide the capability I was hoping for. 73, Dale WA8SRA On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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 - Filter suggestions for new builder
The limit occurs several places ... adjust the HI setting and one will find 4.20 is the maximum available. There is also an analog lowpass filter in the audio (headphone and speaker) between the DAC and the headphone/speaker amplifiers. I'm sure this limitation derives from the roughly 10 KHz clock/sample rate used for the DAC ... Nyquist says the maximum frequency can not be more than half the sample (clock) rate. 4.2 KHz is plenty good enough for communications audio ... and not bad for AM with fading, noise, and interference typical of medium and high frequencies. The FM filter still provides noticeably better double sideband AM response (4.2 - 4.5 KHz with DSP/LPF skirts) than the AM filter (3.0-3.3 KHz depending on the IF filter response). 73, ... Joe, W4TV On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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 - Should I buy simple now or save for loaded rig?
I just went through a very similar scenario. A few months ago I bought a base K3 with one extra filter, the KAT2 and KXV3A. I purchased the kit version. A couple of weeks ago I decided to add two 200 matching filters, the gen coverage rcv, the sub rcv and the 100 watt kit. This is a fairily major upgrade since the sub requires removal and some disassembly of the front pannel to install the sub's DSP. I first studied the original assembly manual to see the order of adding these at the time of original build. I then proceeded with the manuals for each of the three new modules, sub DSP front panel firsr, then gen cov, then 100watt, and finally the actual sub rcv. Although it seemed a little overwhelming at first, when looking at all the parts and instructions, the process was very straightforward, almost too easy. The instructions are excellent as expected. The best part was that everything worked. The only difficult part was getting the sub installed, in particular, getting those darn cables positioned correctly and out of the way. This has nothing to do with adding it later. It's why you don't want to remove the sub too often. Hint, get any other modules you want first, including filters. One last point...by building the K3 kit to start with, you won't be intimidated to do some add-ons later. Good luck with your purchase. - 73, Don KA1KU -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Should-I-buy-simple-now-or-save-for-loaded-rig-tp7562572p7563324.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 - Filter suggestions for new builder
Joe, Good observations, all. I agree that 4.2 KHz is certainly good enough for communications audio. The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), figuring that being able to simultaneously hear the wider bandwidth and see it on the P3 would be a great combination. I'll just have to be a bit quicker with the VFO-B knob ;-) 73, Dale WA8SRA On 9/26/2012 8:10 PM, Joe Subich, W4TV wrote: The limit occurs several places ... adjust the HI setting and one will find 4.20 is the maximum available. There is also an analog lowpass filter in the audio (headphone and speaker) between the DAC and the headphone/speaker amplifiers. I'm sure this limitation derives from the roughly 10 KHz clock/sample rate used for the DAC ... Nyquist says the maximum frequency can not be more than half the sample (clock) rate. 4.2 KHz is plenty good enough for communications audio ... and not bad for AM with fading, noise, and interference typical of medium and high frequencies. The FM filter still provides noticeably better double sideband AM response (4.2 - 4.5 KHz with DSP/LPF skirts) than the AM filter (3.0-3.3 KHz depending on the IF filter response). 73, ... Joe, W4TV On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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 - Filter suggestions for new builder
Right, Don! I still believe that many K3 users are under the erroneous impression that the roofing filter determines the receiver bandwidth. It does not. The HI and LO knobs do. The only thing the roofing filter does is determine the MAXIMUM possible bandwidth of the receiver. In 99% of cases, an SSB roofing filter is good enough. (That statement is going to draw some fire.) It's a little bit like this: the roofing filter is like the credit limit on your Visa card. You can't go any higher than that. But in any typical month, you spend far less than that... and on the K3 the amount you *actually* spend is set by the HI and LO cut controls. This is why I advised the original poster: you wanna know what 1.8 kHz sounds like? Set your HI LO controls to a bandwidth of 1.8 kHz. Then decide whether it 1/ is tolerable; and 2/ increases intelligibility enough to make the investment worth it. I happen to think that 1.8 kHz is too narrow. But that's just me. I say that because in all cases with the K3, it is the DSP that determines the filter width rather than the roofing filter. What I am saying is that even if you put in a 1.8k filter, SSB at a 1.8k width will sound the same as it does right now using only the DSP. 73, Don W3FPR __ 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] Oscilloscope Requirements?
Thanks Jack the eevblog was very helpful. Exactly the kind of info I was looking for. I appears the USB scopes are somewhat lacking in the samples/sec dept. Looks like I'm going with a deskstop, 100mHz, 1 GSa/s, 2 channel. Thanks for all the comments everybody. -- View this message in context: http://elecraft.365791.n2.nabble.com/Oscilloscope-Requirements-tp7563195p7563327.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 - Filter suggestions for new builder
The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), The width of the roofing filter has nothing at all to do with hearing more of the pile-up (unless you're talking about literally listening to all the signals at one time like a pile-up tape). The P3's pick- up point is ahead of any roofing filter - it can see up to 200 KHz at a time. The K3 transmitter and receiver can be split anywhere in the band and if the KRX3 is used with a separate antenna the K3 and KRX3 can literally transmit on one band and listen on another. 73, ... Joe, W4TV On 9/26/2012 8:58 PM, Dale Boresz wrote: Joe, Good observations, all. I agree that 4.2 KHz is certainly good enough for communications audio. The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), figuring that being able to simultaneously hear the wider bandwidth and see it on the P3 would be a great combination. I'll just have to be a bit quicker with the VFO-B knob ;-) 73, Dale WA8SRA On 9/26/2012 8:10 PM, Joe Subich, W4TV wrote: The limit occurs several places ... adjust the HI setting and one will find 4.20 is the maximum available. There is also an analog lowpass filter in the audio (headphone and speaker) between the DAC and the headphone/speaker amplifiers. I'm sure this limitation derives from the roughly 10 KHz clock/sample rate used for the DAC ... Nyquist says the maximum frequency can not be more than half the sample (clock) rate. 4.2 KHz is plenty good enough for communications audio ... and not bad for AM with fading, noise, and interference typical of medium and high frequencies. The FM filter still provides noticeably better double sideband AM response (4.2 - 4.5 KHz with DSP/LPF skirts) than the AM filter (3.0-3.3 KHz depending on the IF filter response). 73, ... Joe, W4TV On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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] K3 - Filter suggestions for new builder
Another way of looking at it is this: Just because a signal gets inside of your roofing filter doesn't mean squat. If the mixers can handle the signal's level, and the HI LO cut controls can slice off the signal, you won't even know it's there. You simply don't care! The only time this could become a problem is if the signal that squeezes into your roofing filter is huge. Then it could start polluting your passband with intermod products or activating your AGC. EVEN THEN, most hams can't even detect the first 10 dB or so of this distortion. And it's such a rare event: operating a really hot contest with a really big antenna with just the right combination of interferers; or your ham neighbor very close to you, etc. In these corner cases, you can justify extreme measures of narrow roofing filters, etc. I believe that 99% of us can get by with 1 SSB roofing filter and perhaps 1 CW-width roofing filter. The intermediate bandwidths are really overkill. So don't sweat a 2.7 vs. 2.8 kHz filter so much. You can't tell the difference when you're listening to an SSB signal with the HI LO controls set to a WIDTH of 2.4 or 2.6 kHz. Agonizing over buying a roofing filter of 2.7 or 2.1 kHz is a little like worrying if you should go for the 89 octane gasoline. If you've got the money, go for it. But you probably won't notice any difference at all. Finally, I will say this: if you find your 1.0 kHz roofing filter isn't wide enough to protect you against, you know, W4ZV's super contest signal, you're probably too close to him. In that case, just move about 600 Hz up the band. :^) With the utmost respect to W4ZV, Al W6LX __ 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] K2 For Sale Nice Condition and working good
I have a K2/10 for sale. It has the: N8BX Weighted knob SSB Board 160 Board with receive antenna Noise Blanker and the Z1B If Output Board. This radio was recently aligned and is working perfect. Email me direct for pictures, I have many good quality pics of the rig. TNX Mike NT8O __ 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 - Filter suggestions for new builder
Joe, Understood. I wanted to be able to simultaneously hear and see 12 Khz or so of cw signals, thinking that I could more quickly identify the station being worked. For example, if I know the dx station is listening from 14.010 to 14.020 (admittedly pretty wide), I figured I could include that entire range within the FM filter bandwidth (which I still can do), AND also hear all 10 KHz of those signals (which I've learned I cannot do). Oh well; the FM filter will still let me hear a wider swath of the pile-up than my present 2.8KHz filter will... 73, Dale WA8SRA On 9/26/2012 9:25 PM, Joe Subich, W4TV wrote: The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), The width of the roofing filter has nothing at all to do with hearing more of the pile-up (unless you're talking about literally listening to all the signals at one time like a pile-up tape). The P3's pick- up point is ahead of any roofing filter - it can see up to 200 KHz at a time. The K3 transmitter and receiver can be split anywhere in the band and if the KRX3 is used with a separate antenna the K3 and KRX3 can literally transmit on one band and listen on another. 73, ... Joe, W4TV On 9/26/2012 8:58 PM, Dale Boresz wrote: Joe, Good observations, all. I agree that 4.2 KHz is certainly good enough for communications audio. The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), figuring that being able to simultaneously hear the wider bandwidth and see it on the P3 would be a great combination. I'll just have to be a bit quicker with the VFO-B knob ;-) 73, Dale WA8SRA On 9/26/2012 8:10 PM, Joe Subich, W4TV wrote: The limit occurs several places ... adjust the HI setting and one will find 4.20 is the maximum available. There is also an analog lowpass filter in the audio (headphone and speaker) between the DAC and the headphone/speaker amplifiers. I'm sure this limitation derives from the roughly 10 KHz clock/sample rate used for the DAC ... Nyquist says the maximum frequency can not be more than half the sample (clock) rate. 4.2 KHz is plenty good enough for communications audio ... and not bad for AM with fading, noise, and interference typical of medium and high frequencies. The FM filter still provides noticeably better double sideband AM response (4.2 - 4.5 KHz with DSP/LPF skirts) than the AM filter (3.0-3.3 KHz depending on the IF filter response). 73, ... Joe, W4TV On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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 - Should I buy simple now or save for loaded rig?
Don, That is good information for prospective kit builders. Yes, the Elecraft instructions are very good - follow the instructions given in the manual and you will have success. 73, Don W3FPR On 9/26/2012 8:54 PM, Don KA1KU wrote: I just went through a very similar scenario. A few months ago I bought a base K3 with one extra filter, the KAT2 and KXV3A. I purchased the kit version. A couple of weeks ago I decided to add two 200 matching filters, the gen coverage rcv, the sub rcv and the 100 watt kit. This is a fairily major upgrade since the sub requires removal and some disassembly of the front pannel to install the sub's DSP. I first studied the original assembly manual to see the order of adding these at the time of original build. I then proceeded with the manuals for each of the three new modules, sub DSP front panel firsr, then gen cov, then 100watt, and finally the actual sub rcv. Although it seemed a little overwhelming at first, when looking at all the parts and instructions, the process was very straightforward, almost too easy. The instructions are excellent as expected. The best part was that everything worked. __ 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] KPA100 100 watt unit for K2 for sale
I have a KPA100 that is fully assembled and ready to use, just install your speaker and plug in and you are ready to go. Is in nice working condition, non-smoking pet free owned. $350.00 Email me direct for pictures. Mike NT8O __ 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] K2 KAT100 Tuner For Sale
I have an assembled KAT100 tuner for sale. It is working as it should and is in very nice cosmetic condition. Also comes with the RS232 Cable. For pictures email me directly. $200.00 Mike NT8O __ 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] K2 For Sale Nice Condition and working good
Omitted the price on my first post. Price is $750.00 NT8O I have a K2/10 for sale. It has the: N8BX Weighted knob SSB Board 160 Board with receive antenna Noise Blanker and the Z1B If Output Board. This radio was recently aligned and is working perfect. Email me direct for pictures, I have many good quality pics of the rig. TNX Mike NT8O __ 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 - Filter suggestions for new builder
*Al, whilst your statements hold true for you, I DO use the 1.8Khz almost as my default. Attention paid to Hi/Lo gives me nice intelligibility and if you were listening to 3D2C last night on 20M and witnessed the deplorable behavior of stations deliberately providing QRM on their call frequency you have not been impressed. I ran at 1.8Khz, tightened it up some more with Hi/LO, watched on the P3 and pounced, got'em, no problem. ( I see the on-line log does not show my success as yet) Whilst I have absolutely no idea why 3D2C generated so much qrm against them, I can only say it was a sad day and the operators I heard (2) running 3D2C were great to listen to. 73 * On 27 September 2012 11:06, Al Lorona alor...@sbcglobal.net wrote: Right, Don! I still believe that many K3 users are under the erroneous impression that the roofing filter determines the receiver bandwidth. It does not. The HI and LO knobs do. The only thing the roofing filter does is determine the MAXIMUM possible bandwidth of the receiver. In 99% of cases, an SSB roofing filter is good enough. (That statement is going to draw some fire.) It's a little bit like this: the roofing filter is like the credit limit on your Visa card. You can't go any higher than that. But in any typical month, you spend far less than that... and on the K3 the amount you *actually* spend is set by the HI and LO cut controls. This is why I advised the original poster: you wanna know what 1.8 kHz sounds like? Set your HI LO controls to a bandwidth of 1.8 kHz. Then decide whether it 1/ is tolerable; and 2/ increases intelligibility enough to make the investment worth it. I happen to think that 1.8 kHz is too narrow. But that's just me. I say that because in all cases with the K3, it is the DSP that determines the filter width rather than the roofing filter. What I am saying is that even if you put in a 1.8k filter, SSB at a 1.8k width will sound the same as it does right now using only the DSP. 73, Don W3FPR __ 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] K3 - Filter suggestions for new builder
Hello Stan. I am an avid CW enthusiast and spend 100% of my time, usually around 4-6 hours a night on 20/40m CW. I have 2 identical loaded to the the max K3/100's and P3's purchased late this year. I have been very happy with my filter choices: 1. 13KHz FM 2. 6KHz AM INRAD 3. 2.8KHz INRAD 4. 400Hz INRAD 5. 200Hz 5-pole (lowest INRAD was 250Hz I think and I wanted the scalpel) I have all 5 filters populated on MAIN RX. I only have one filter, 2.8K on SUB. I almost never use the sub, so figured I could add them later if necessary. Only ordered the SUB's in the event I ever sold the rigs the next guy would probably want them. This is my order printout for both K3's: Item Ref. Price ea. Qty. Description 144OPT100 $0.00 1 K144XV Panel Kit for K3 /100 K144RFLK$89.95 1 K144XV REFLOCK K144XV-F$349.95 1 K3 Int. 2 M Module; Assm. K3/100-F$2249.951 K3 100W Xcvr. (Assembled) K3SSKT $19.95 1 K3 Stainless H/W Kit KAT3-F $339.95 1 K3 ATU (Fact. Installed) KBPF3 $149.95 1 K3 Gen. Cov. RX Module KDVR3 $129.95 1 K3 Dig. Voice Recorder KFL3A-2.8_2.7sw $129.95 2 2.8 for 2.7 kHz swap KFL3A-200 $89.95 1 K3 200 Hz, 5 pole filter KFL3A-400 $139.95 1 K3 400 Hz, 8 pole filter KFL3A-6K$139.95 2 K3 6 kHz, 8 pole filter KFL3B-FM$139.95 1 K3 FM b/w filter KRX3-F $659.95 1 K3 2nd RX (Fact. Assm.) KTCXO3-1$99.95 1 K3 TCXO (0.5ppm) KUSB$39.95 1 Univ. Ser Bus Adapt. KXV3A $119.95 1 K3 RX Ant, IF Out Xvrtr Int MH2 $59.95 1 Hand Mic. for K2/K3. P3-F$749.95 1 P3-F Panadapter -Assembled- P3SVGA $259.95 1 P3 Video/FFT Adapt. In case you're wondering, this order shows an extra 6KHz because I didn't originally include it on the first K3. I added it so both K3's would match in the event I wanted to do some SSB in the future. Both the MAIN and SUB filters were upgraded at order time from the 2.7K to the 2.8K. I personally LOVE the sharper skirts of the INRAD's. I was a total Icom guy before this summer when I got behind a K3. Since then I have sold 4 of the 5 Icom radios, including a brand new (2 weeks use) IC-7600. The 5th is for sale on QRZ. Icoms are very well built and have fancy displays, however, their receivers leave much to be desired when it comes to the filtering aspects. Very noisy. IMO, I buy a rig for the RX quality, quietness, sensitivity, and versatility. My choice to go Elecraft was based on a 30 day comparison of the K3 vs. the FTDX5000MP. I tried a few other rigs during that time including TnT and Kenwood, but the K3 and 5K were tops. Yes, tried the TnT, awesome break-in, but preferred the K3 and 5K over TnT. In short, here's the scoop: If you're mainly sideband, the Yaesu wins. If you're mainly CW, the K3 wins. The K3 is better on the lower bands and the 5K is better on the higher bands. However, the K3 is no slouch on SSB either. I'm sure people differ in opinions and appreciate taking their entire desk to house a big rig that weighs about 50# with tons of knobs to clean, but unless you have $12K to throw at both of them to test personally, I'd go Elecraft. That's my honest opinion. I was lucky to have a couple of friends that have them both side by side at the same time. I prefer the 8# loaded K3 that leaves room for my KPA-500, P3, paddle, and accessories as well. Anyway, for what it's worth, those are my filters and opinions on the two best rigs on the market this summer. Take care and 73 de Scott - n0nuf -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filter-suggestions-for-new-builder-tp7563280p7563337.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 - Filter suggestions for new builder
I figured I could include that entire range within the FM filter bandwidth (which I still can do), AND also hear all 10 KHz of those signals (which I've learned I cannot do). Your ears are much better than mine if you can actually copy a full 10 KHz wide audio pile-up. I have enough trouble keeping up with 4 KHz or so (200 Hz to 4.2 KHz) if I open everything up in SSB mode. Note the K3 limits HI in CW to Pitch + 1400 Hz thus if one likes a 500 Hz tone, the highest frequency passed in CW is 1900 Hz. The *widest* bandwidth possible in CW is by using an 800 Hz sidetone which results in 2.2 KHz ... whether the roofing filter is 2.7, 2.8, 6 or 13 KHz wide. 73, ... Joe, W4TV On 9/26/2012 9:46 PM, Dale Boresz wrote: Joe, Understood. I wanted to be able to simultaneously hear and see 12 Khz or so of cw signals, thinking that I could more quickly identify the station being worked. For example, if I know the dx station is listening from 14.010 to 14.020 (admittedly pretty wide), I figured I could include that entire range within the FM filter bandwidth (which I still can do), AND also hear all 10 KHz of those signals (which I've learned I cannot do). Oh well; the FM filter will still let me hear a wider swath of the pile-up than my present 2.8KHz filter will... 73, Dale WA8SRA On 9/26/2012 9:25 PM, Joe Subich, W4TV wrote: The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), The width of the roofing filter has nothing at all to do with hearing more of the pile-up (unless you're talking about literally listening to all the signals at one time like a pile-up tape). The P3's pick- up point is ahead of any roofing filter - it can see up to 200 KHz at a time. The K3 transmitter and receiver can be split anywhere in the band and if the KRX3 is used with a separate antenna the K3 and KRX3 can literally transmit on one band and listen on another. 73, ... Joe, W4TV On 9/26/2012 8:58 PM, Dale Boresz wrote: Joe, Good observations, all. I agree that 4.2 KHz is certainly good enough for communications audio. The only reason I had for putting the FM filter in the 2nd receiver was to be able to hear more of the split in a broad pileup situation (like the extremely large split widths that we saw a few months ago with 7O6T), figuring that being able to simultaneously hear the wider bandwidth and see it on the P3 would be a great combination. I'll just have to be a bit quicker with the VFO-B knob ;-) 73, Dale WA8SRA On 9/26/2012 8:10 PM, Joe Subich, W4TV wrote: The limit occurs several places ... adjust the HI setting and one will find 4.20 is the maximum available. There is also an analog lowpass filter in the audio (headphone and speaker) between the DAC and the headphone/speaker amplifiers. I'm sure this limitation derives from the roughly 10 KHz clock/sample rate used for the DAC ... Nyquist says the maximum frequency can not be more than half the sample (clock) rate. 4.2 KHz is plenty good enough for communications audio ... and not bad for AM with fading, noise, and interference typical of medium and high frequencies. The FM filter still provides noticeably better double sideband AM response (4.2 - 4.5 KHz with DSP/LPF skirts) than the AM filter (3.0-3.3 KHz depending on the IF filter response). 73, ... Joe, W4TV On 9/26/2012 7:23 PM, Don Wilhelm wrote: Sorry, but yes, the K3 audio is limited at 4 kHz, no matter whether it is to the headphones or to the speaker. Please do not shoot the messenger. but that information is in the archives of this reflector in several places - it has been discussed periodically. If you want to lobby for extended audio response, that is fine, but I am just saying what the limits are today. Whether those can be extended or not is for the DSP designer to answer. 73, Don W3FPR On 9/26/2012 7:11 PM, Dale Boresz wrote: On 9/26/2012 1:35 PM, Edward R Cole wrote: ... But I learned that audio is limited to 4-KHz regardless of IF filter so I ended up selling the extra 13-KHz filter. ... 73, Ed - KL7UW I really hope that this does not apply to received audio to the headphones or loudspeaker! I just purchased two FM filters (one for sub-receiver to monitor wide splits) specifically to open up the receive passband (audio included) for SWL and BCB reception. I have no intention of actually transmitting FM or AM for that matter -- just want the wider audio bandwidth for receive. So... is the received audio bandwidth *really* limited to 4 KHz? __ 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
Re: [Elecraft] SDR with KX3? IF-PSDR use?
Brian, I use NaP3 with my KX3. It is set up to fully function with the KX3, ala the FlexRado series. I can either control my KX3 with NaP3 or just reflect what I'm doing with the radio, and the monitor than functions like a panadapter. As far as I can see, NaP3 is the only software package that I can do this with. I have tried HDSDR, PowerSDR-IQ, and PowerSDR-IF. The first two played well, but wasn't quite as all inclusive as NaP3. PowerSDR-IF doesn't seem to play well on my Windows 7 system. It appears that NaP3 is basically PowerSDR-IQ with a few enhancements. The only downside I've found so far with NaP3 is I can hear the refresh in the audio out; this was not the case with the other software. Bottom line: NaP3 seems to fit the KX3 better than other software. 73, Barry K3NDM - Original Message - From: Brian Pepperdine brianpepperd...@sympatico.ca To: elecraft@mailman.qth.net Sent: Wednesday, September 26, 2012 5:53:11 PM Subject: [Elecraft] SDR with KX3? IF-PSDR use? With all the talk of trying to get KX3 working with NaP3... I have to ask.What about using IF-PSDR? I use IF-PSDR on my K3 with LP-Pan/Bridge and like it.I tried NaP3 last winter (when I was active before good weather) and I found I did not like it. That's me, I guess. Anyone know why the attention is only on the one software, it seems?I think initially I was hearing about HDSDR (I am right?) back in the early talk on KX3, but don't about it all now, that I can discern or recall. tnxBrienToronto __ 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
