Re: [Elecraft] Plasma TV Noise any ideas on how to filter it out.
Phil Kane-2 wrote: On 11/26/2010 1:03 PM, Stewart wrote: It's interesting to see that today's UK brother agency (OFCOM) has the same attitude as today's FCC about (non)enforcement. Here, as in the US I'm sure, it all comes down to money. The resources aren't there to enforce the rules, and hams are a small minority group with no political clout. With all the public service cuts it can only get worse. Companies are importing goods from China that are actually dangerous, with fake CE marks (there was a news item about it this morning.) Using the law to force the authorities to enforce compliance is impossible because of high legal fees. The RSGB wanted to mount a legal challenge to Ofcom's failure to act on the problem of PLT devices and was informed it would cost £200,000 just to get started, about 10 times the amount they'd managed to raise by appeal. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Plasma-TV-Noise-any-ideas-on-how-to-filter-it-out-tp5775346p5779359.html Sent from the [HAM] 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] Line out, speakers, and L-mix-R settings...
Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? 73, Mike NF4L On 11/26/2010 11:52 PM, Richard Ferch wrote: James, I hope your daughter is feeling better soon. Re your questions (based on my observations using sound card software on both channels from the LINE OUT jack, and stereo headphones plugged into the SPKRS jack): 1. The CONFIG:SPKRS setting only affects the rear panel SPKRS jack. It has no effect on LINE OUT. 2. None of the audio mixing or level controls has any effect on the LINE OUT signal, as far as I can tell. The left channel always carries the main RX output, and the right channel always carries the sub RX output. The LINE output is raw unmixed audio from the two receivers at a fixed level set by CONFIG:LIN OUT. 3. When CONFIG:SPKRS = 2, the SPKRS jack behaves the same as the headphone jacks. With SUB off, the main RX is in both channels, and with SUB on and the normal L-MIX-R setting, the main RX and sub RX are in left and right channels respectively. Changing the L-MIX-R setting affects the SPKRS the same way as it affects the PHONES output. When CONFIG:SPKRS = 1, the only speaker output is on the left channel of the SPKRS jack, i.e. it disables the right channel output even when SUB is on. If SUB is on, the external mono speaker on the left channel carries audio from both receivers mixed together, the same as the internal speaker. The purpose of the CONFIG:SPKRS = 1 option is to protect the speaker amp if a mono plug is plugged into the SPKRS jack. 73, Rich VE3KI __ 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] Dell D610 Laptop for Sale
Computer is a Dell D610 1.86Ghz Pentium M PC with 2GB of RAM 120GB Hard Drive. Everything works 100% and there is a fresh brand new legal and legit install of Windows XP Pro SP3 on it I don't have the original Windows install CD but I do have a back-up of it that I can provide and there is a MS COA sticker on the bottom but its a bit hard to read. The Dell install CD doesn't require entry of this value to install though. I've installed flash, acrobat reader, the free version of the AVG virus scanner, Thunder Bird Email client, and Open Office so you'll be able to work with all office applications. The computer currently has one user account Computer Owner with a password of password and as mentioned is a brand new install of windows. Computer also comes with two power supplies (one to leave at home and one for traveling), 3 batteries two main bay batteries and one accessory battery that can be installed into the CD-ROM slot. The DVD+/-RW drive which can burn dual layer DVD's as well as another accessory that allows you to replace the CD-ROM drive with a 3.5 floppy if need be. The floppy drive can also be plugged in externally via a USB cable. This computer also has a REAL RS232 serial port and a REAL parallel port along with several USB ports if further RS232 communications adapters are required. I'd like to get $300 USD + Actual shipping for it. Thanks for looking ~Brett (N7MG) __ 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: noise reduction performance
Hello Elecrafters, Regarding the issue of NR, I know this can be a touchy subject and most will say its very subjective. This post isn't intended as a complaint or criticism. Instead, I hope through constructive discussions, more improvements to the K3's NR performance will be realized. I'd like to begin by saying that Lyle and crew have a done a fantastic job to date with the K3's NR. I've had the privilege of watching the K3's NR function improve over time. The boys at Aptos should really be commended for listening to their customers. With that said, the recent CQSS has made me realize that there is still room for improvement. During the SS, I used NR extensively in combination with RF gain and filter hi-cut/lo-cut/shift settings. NR when used in combination with the aforementioned K3 adjustments can and does work well. The problem that I believe remains however is the algorithm used still seems too broad in its rejection calculations; what I mean is that SSB settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce noise while allowing speech patterns to remain unaffected. In other words, the DSP sounds like its reducing everything within its passband. To my ears, the NR doesn't seem to make speech pop out quite as effectively has other NR implementations. This can be seen by a not-so-subtle reduction in speech volume whenever the NR is turned on. The NR behavior is consistent regardless of AGC slope or threshold settings. Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. http://www.w4rt.com/BHI/20Mband-ssb.wav -- 73 de James K2QI President UNARC/4U1UN __ 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: noise reduction performance
Hi James I concur with your observations and let us have an open minded discussion here. Johnny vr2xmc Sent from my iPhone 4 James Sarte (K2QI) k2qi@gmail.com 於 2010年11月27日 下午8:16 寫道： Hello Elecrafters, Regarding the issue of NR, I know this can be a touchy subject and most will say its very subjective. This post isn't intended as a complaint or criticism. Instead, I hope through constructive discussions, more improvements to the K3's NR performance will be realized. I'd like to begin by saying that Lyle and crew have a done a fantastic job to date with the K3's NR. I've had the privilege of watching the K3's NR function improve over time. The boys at Aptos should really be commended for listening to their customers. With that said, the recent CQSS has made me realize that there is still room for improvement. During the SS, I used NR extensively in combination with RF gain and filter hi-cut/lo-cut/shift settings. NR when used in combination with the aforementioned K3 adjustments can and does work well. The problem that I believe remains however is the algorithm used still seems too broad in its rejection calculations; what I mean is that SSB settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce noise while allowing speech patterns to remain unaffected. In other words, the DSP sounds like its reducing everything within its passband. To my ears, the NR doesn't seem to make speech pop out quite as effectively has other NR implementations. This can be seen by a not-so-subtle reduction in speech volume whenever the NR is turned on. The NR behavior is consistent regardless of AGC slope or threshold settings. Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. http://www.w4rt.com/BHI/20Mband-ssb.wav -- 73 de James K2QI President UNARC/4U1UN __ 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 Noise Blanker (was K3 Plasma TV and other non OTjunque)
The logical cure for line noise is to notify the power distributor in the area and ask them to locate the noise and eliminate it. I have had good luck in this regard especially if you take the time to narrow the noise to specific poles, etc. If you get little feedback from them, contact the FCC. Its a slow process sometimes but the RFI from power lines can be cured. I have had to involve the power distributor at every QTH during my years of Amateur Radio and had very good luck getting a quiet QTH which involved power line interference; much easier than having to deal with neighbor's devices.. Jim K4JAF - Original Message - From: Edward Dickinson, III softb...@windstream.net To: Elecraft Reflector Elecraft@mailman.qth.net Sent: Friday, November 26, 2010 10:55 PM Subject: [Elecraft] K3 Noise Blanker (was K3 Plasma TV and other non OTjunque) I operate in a sometimes very high QRN area...45 y.o. Electric Distribution System in the area. Unblanked Noise has recently and regularly been in the 10 over S-9 realm on 40 meters. Can improvements be made to the K3 Noise Blanker? Firmware..? Hardware..? 73, Dick - KA5KKT -- I wonder if Elecraft might have a plasma nearby and could run some test on the K3 NB possibly making some custom changes? Steve N4LQ __ 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] Line out, speakers, and L-mix-R settings...
I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV On 11/27/2010 5:34 AM, Mike wrote: Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? 73, Mike NF4L On 11/26/2010 11:52 PM, Richard Ferch wrote: James, I hope your daughter is feeling better soon. Re your questions (based on my observations using sound card software on both channels from the LINE OUT jack, and stereo headphones plugged into the SPKRS jack): 1. The CONFIG:SPKRS setting only affects the rear panel SPKRS jack. It has no effect on LINE OUT. 2. None of the audio mixing or level controls has any effect on the LINE OUT signal, as far as I can tell. The left channel always carries the main RX output, and the right channel always carries the sub RX output. The LINE output is raw unmixed audio from the two receivers at a fixed level set by CONFIG:LIN OUT. 3. When CONFIG:SPKRS = 2, the SPKRS jack behaves the same as the headphone jacks. With SUB off, the main RX is in both channels, and with SUB on and the normal L-MIX-R setting, the main RX and sub RX are in left and right channels respectively. Changing the L-MIX-R setting affects the SPKRS the same way as it affects the PHONES output. When CONFIG:SPKRS = 1, the only speaker output is on the left channel of the SPKRS jack, i.e. it disables the right channel output even when SUB is on. If SUB is on, the external mono speaker on the left channel carries audio from both receivers mixed together, the same as the internal speaker. The purpose of the CONFIG:SPKRS = 1 option is to protect the speaker amp if a mono plug is plugged into the SPKRS jack. 73, Rich VE3KI __ 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] Line out, speakers, and L-mix-R settings...
Mike, Thanks for pointing that out - I had completely forgotten about that option. I guess it's time I printed out a new copy of the manual! Of course, that changes the answer to James' question #2; if you want the LINE output to be a clone of the headphones output, set CONFIG:LIN OUT to =PHONES. With CONFIG:LIN OUT =PHONES, when the subRX is off, the main RX is in both channels. This setting seems tailor-made for James' situation (listening to speakers through a sound card). For digital modes, as Joe has pointed out, when SUB is on, you use the two channels to feed two independent copies of MMTTY (or other software). You do not want any mixing of the two signals. Also, you do not want the volume control to affect the audio level going into the decoder. If you use the audio pitch as a tuning aid, you want the ability to turn the audio down or to change the balance between the two channels without interrupting the ongoing decoding of both signals. When SUB is off, you only use (or need) one channel in the sound card. The right channel waterfall just goes black when the sub RX is off. You can use two different decoding algorithms on a single signal by running two (or more) independent decoding programs (e.g. two or more separate copies of MMTTY using different profiles) from a single channel in the sound card. 73, Rich VE3KI NF4L wrote: Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? __ 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: noise reduction performance
Hello James, I use a BHI ANEM Mk II with my K2, and get similar results. My K2 does not have the Noise Blanker installed nor the DSP, one reason being that man-made noise at this quiet rural location was never a problem. But, about two years ago some new neighbours arrived armed with some device that generates RFI, which I think is something used in their kitchen, maybe a blender - hence the purchase of the BHI which solved this noise problem when using the K2. The NR in my Perseus SDR performs well, but not quite as well as the BHI - but that is an impression. The usual disclaimers apply. 73, Geoff GM4ESD On November 27, 2010, at 12:16 PM, James Sarte (K2QI) wrote: snip Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. __ 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] Line out, speakers, and L-mix-R settings...
Joe, if you mean stand alone MMTTY, I don't understand. I wouldn't want to copy copy both signals. Each copy of MMTTY could use a different sound card (given 2 sound cards) but still no way to direct sound by channel. I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. All that strikes me as a kludge, but I certainly don't have a better solution. :-( Mike NF4L On 11/27/2010 8:14 AM, Joe Subich, W4TV wrote: I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV On 11/27/2010 5:34 AM, Mike wrote: Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? 73, Mike NF4L On 11/26/2010 11:52 PM, Richard Ferch wrote: James, I hope your daughter is feeling better soon. Re your questions (based on my observations using sound card software on both channels from the LINE OUT jack, and stereo headphones plugged into the SPKRS jack): 1. The CONFIG:SPKRS setting only affects the rear panel SPKRS jack. It has no effect on LINE OUT. 2. None of the audio mixing or level controls has any effect on the LINE OUT signal, as far as I can tell. The left channel always carries the main RX output, and the right channel always carries the sub RX output. The LINE output is raw unmixed audio from the two receivers at a fixed level set by CONFIG:LIN OUT. 3. When CONFIG:SPKRS = 2, the SPKRS jack behaves the same as the headphone jacks. With SUB off, the main RX is in both channels, and with SUB on and the normal L-MIX-R setting, the main RX and sub RX are in left and right channels respectively. Changing the L-MIX-R setting affects the SPKRS the same way as it affects the PHONES output. When CONFIG:SPKRS = 1, the only speaker output is on the left channel of the SPKRS jack, i.e. it disables the right channel output even when SUB is on. If SUB is on, the external mono speaker on the left channel carries audio from both receivers mixed together, the same as the internal speaker. The purpose of the CONFIG:SPKRS = 1 option is to protect the speaker amp if a mono plug is plugged into the SPKRS jack. 73, Rich VE3KI __ 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] Line out, speakers, and L-mix-R settings...
I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. You don't want to mix the signals ... they would QRM each other. I can't see any reason for mixing them and running independent copies of MMTTY or MixW in the dual channel mode is the best way to select the signal. 73, ... Joe, W4TV On 11/27/2010 8:58 AM, Mike wrote: Joe, if you mean stand alone MMTTY, I don't understand. I wouldn't want to copy copy both signals. Each copy of MMTTY could use a different sound card (given 2 sound cards) but still no way to direct sound by channel. I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. All that strikes me as a kludge, but I certainly don't have a better solution. :-( Mike NF4L On 11/27/2010 8:14 AM, Joe Subich, W4TV wrote: I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV On 11/27/2010 5:34 AM, Mike wrote: Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? 73, Mike NF4L On 11/26/2010 11:52 PM, Richard Ferch wrote: James, I hope your daughter is feeling better soon. Re your questions (based on my observations using sound card software on both channels from the LINE OUT jack, and stereo headphones plugged into the SPKRS jack): 1. The CONFIG:SPKRS setting only affects the rear panel SPKRS jack. It has no effect on LINE OUT. 2. None of the audio mixing or level controls has any effect on the LINE OUT signal, as far as I can tell. The left channel always carries the main RX output, and the right channel always carries the sub RX output. The LINE output is raw unmixed audio from the two receivers at a fixed level set by CONFIG:LIN OUT. 3. When CONFIG:SPKRS = 2, the SPKRS jack behaves the same as the headphone jacks. With SUB off, the main RX is in both channels, and with SUB on and the normal L-MIX-R setting, the main RX and sub RX are in left and right channels respectively. Changing the L-MIX-R setting affects the SPKRS the same way as it affects the PHONES output. When CONFIG:SPKRS = 1, the only speaker output is on the left channel of the SPKRS jack, i.e. it disables the right channel output even when SUB is on. If SUB is on, the external mono speaker on the left channel carries audio from both receivers mixed together, the same as the internal speaker. The purpose of the CONFIG:SPKRS = 1 option is to protect the speaker amp if a mono plug is plugged into the SPKRS jack. 73, Rich VE3KI __ 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] Line out, speakers, and L-mix-R settings...
I'm not suggesting mixing signals, in fact I'm trying to arrive at a method of conveniently eliminating one of them. I just looked into MMTTY and saw (for the first time) the ability to select mono, left, or right. Kewl! :-P 73, Mike NF4L On 11/27/2010 9:26 AM, Joe Subich, W4TV wrote: I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. You don't want to mix the signals ... they would QRM each other. I can't see any reason for mixing them and running independent copies of MMTTY or MixW in the dual channel mode is the best way to select the signal. 73, ... Joe, W4TV On 11/27/2010 8:58 AM, Mike wrote: Joe, if you mean stand alone MMTTY, I don't understand. I wouldn't want to copy copy both signals. Each copy of MMTTY could use a different sound card (given 2 sound cards) but still no way to direct sound by channel. I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. All that strikes me as a kludge, but I certainly don't have a better solution. :-( Mike NF4L On 11/27/2010 8:14 AM, Joe Subich, W4TV wrote: I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV __ 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] Line out, speakers, and L-mix-R settings...
Mike, I don't understand why you think there is a problem. I guess I don't understand what you are trying to do. The hardware setup to use both receivers in RTTY is simple, and no different from what you use with a single receiver - a single stereo cable from the K3's LINE OUT to the sound card's LINE IN for receive, a single mono (or stereo) cable from the sound card's LINE OUT to the K3's LINE IN for AFSK transmit, and use RTS on the radio control port for PTT. Or, if you prefer FSK, replace the AFSK transmit cable with FSK and PTT keying circuits to the AUX input. There is no need for a second sound card, no need to cut cables, no need to use a mixer to adjust balance. You set up one copy of MMTTY to receive using only the left channel of a single sound card, and a separate copy of MMTTY to receive using only the right channel of the same sound card. The two operate entirely independently. One decodes the signal from the main receiver, the other one from the sub receiver. If you only want to copy one signal, just don't look at the output from the other copy of MMTTY, or if you find it distracting, just turn SUB off and/or close down the second copy of MMTTY. From N1MM Logger, you can open two Entry windows, one for each VFO, and open a separate Digital Interface window from each Entry window, with separate copies of MMTTY each configured to use the appropriate channel of the sound card. You can receive on both receivers at once, and choose which one to transmit to with the \ key. Or, if you only want to use one VFO, just close down the second Entry window. 73, Rich VE3KI NF4L wrote: All that strikes me as a kludge, but I certainly don't have a better solution. :-( __ 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] Line out, speakers, and L-mix-R settings...
Richard, The problem is, as usual, my lack of understanding of how something works. Now that I realize that MMTTY can select either channel, I get it. Unfortunately my PSK software can't do that. :-( Thanks to both you and Joe for the guidance. 73, Mike NF4L On 11/27/2010 10:54 AM, Richard Ferch wrote: Mike, I don't understand why you think there is a problem. I guess I don't understand what you are trying to do. The hardware setup to use both receivers in RTTY is simple, and no different from what you use with a single receiver - a single stereo cable from the K3's LINE OUT to the sound card's LINE IN for receive, a single mono (or stereo) cable from the sound card's LINE OUT to the K3's LINE IN for AFSK transmit, and use RTS on the radio control port for PTT. Or, if you prefer FSK, replace the AFSK transmit cable with FSK and PTT keying circuits to the AUX input. There is no need for a second sound card, no need to cut cables, no need to use a mixer to adjust balance. You set up one copy of MMTTY to receive using only the left channel of a single sound card, and a separate copy of MMTTY to receive using only the right channel of the same sound card. The two operate entirely independently. One decodes the signal from the main receiver, the other one from the sub receiver. If you only want to copy one signal, just don't look at the output from the other copy of MMTTY, or if you find it distracting, just turn SUB off and/or close down the second copy of MMTTY. From N1MM Logger, you can open two Entry windows, one for each VFO, and open a separate Digital Interface window from each Entry window, with separate copies of MMTTY each configured to use the appropriate channel of the sound card. You can receive on both receivers at once, and choose which one to transmit to with the \ key. Or, if you only want to use one VFO, just close down the second Entry window. 73, Rich VE3KI NF4L wrote: All that strikes me as a kludge, but I certainly don't have a better solution. :-( __ 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] Line out, speakers, and L-mix-R settings...
I just looked into MMTTY and saw (for the first time) the ability to select mono, left, or right. Kewl! :-P Yes, if you're not trying to copy both signals at the same time (e.g., split RTTY DX), you can use MMTTY's ability to select Left or Right to select Main/Sub without running two copies. 73, ... Joe, W4TV On 11/27/2010 10:45 AM, Mike wrote: I'm not suggesting mixing signals, in fact I'm trying to arrive at a method of conveniently eliminating one of them. I just looked into MMTTY and saw (for the first time) the ability to select mono, left, or right. Kewl! :-P 73, Mike NF4L On 11/27/2010 9:26 AM, Joe Subich, W4TV wrote: I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. You don't want to mix the signals ... they would QRM each other. I can't see any reason for mixing them and running independent copies of MMTTY or MixW in the dual channel mode is the best way to select the signal. 73, ... Joe, W4TV On 11/27/2010 8:58 AM, Mike wrote: Joe, if you mean stand alone MMTTY, I don't understand. I wouldn't want to copy copy both signals. Each copy of MMTTY could use a different sound card (given 2 sound cards) but still no way to direct sound by channel. I suppose the Windoze mixer could be used to set the balance. Or cut a wire in the audio cable. All that strikes me as a kludge, but I certainly don't have a better solution. :-( Mike NF4L On 11/27/2010 8:14 AM, Joe Subich, W4TV wrote: I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV __ 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: noise reduction performance
This is a good example of just how subjective improvement can be. Sure, the hash is gone, but it's replaced by the underwater warbling sound so common with highly processed audio. Personally, I find that warbling variation in the audio far less pleasant than the noise. Ron AC7AC -Original Message- Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. -- 73 de James K2QI President UNARC/4U1UN __ 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: noise reduction performance
I'm still getting my sea legs on the K3 but NR seems to work really great on CW but on SSB, I can't use it. With it on, regardless of setting, it makes the channel sound watery (for lack of a better term). I have two K3s, and both sound alike on phone with NR invoked. Maybe I don't have them adjusted properly, but I find the sound very disconcerting. Rob K6RB Hello Elecrafters, Regarding the issue of NR, I know this can be a touchy subject and most will say its very subjective. This post isn't intended as a complaint or criticism. Instead, I hope through constructive discussions, more improvements to the K3's NR performance will be realized. I'd like to begin by saying that Lyle and crew have a done a fantastic job to date with the K3's NR. I've had the privilege of watching the K3's NR function improve over time. The boys at Aptos should really be commended for listening to their customers. With that said, the recent CQSS has made me realize that there is still room for improvement. During the SS, I used NR extensively in combination with RF gain and filter hi-cut/lo-cut/shift settings. NR when used in combination with the aforementioned K3 adjustments can and does work well. The problem that I believe remains however is the algorithm used still seems too broad in its rejection calculations; what I mean is that SSB settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce noise while allowing speech patterns to remain unaffected. In other words, the DSP sounds like its reducing everything within its passband. To my ears, the NR doesn't seem to make speech pop out quite as effectively has other NR implementations. This can be seen by a not-so-subtle reduction in speech volume whenever the NR is turned on. The NR behavior is consistent regardless of AGC slope or threshold settings. Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. http://www.w4rt.com/BHI/20Mband-ssb.wav -- 73 de James K2QI President UNARC/4U1UN __ 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 Configuration Question
I use the K3 Freq. Memory Editor sw to program up to 99 memories with specific freq./modes for quick switching. This is loaded via the RS232 port into the K3. Then all I do to change bands/modes is to press MV and rotate VFO-A to select memories 00-99. I have them grouped for favorite freq. in each band and mode: e.g. 51=14.020/CW, 52=14.070/DATA, 53=14.205/USB, 54=14.292/USB, 55=14.345/USB, and 56=15.000/AM ...etc. There are enough memories for me to add favorite 6m, 2m, and 1296 freq./mode memories. The last two bands require that the KV3A is set up using the XVn configuration settings (but that is another subject). 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-800*w, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com == *temp not in service __ 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] FS: QRP J-38 Minature Key
Selling a QRP J-38 Minature Key made by KA6IRL. Soild brass of over 30 parts on a wood base. This half size of a J-38. This is a real WORKING Key, mint condition, never used, in wooden box, $65. Mike Pierce KD8DVV H. Michael Pierce __ 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 High Cut
Any possibility to make High cut by Macro 73 Natale i5nph __ 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] FS: QRP J-38 Miniature Key
The miniature aspect dissuades me, but they appear to be beautiful pieces of work. Pictures and description at http://www.eham.net/reviews/detail/7262 I'll continue on with my ancient WWII J38 hand pump. Not as pretty but still works FB after more than a half-century of pounding and has its own special story. Ron AC7AC -Original Message- Selling a QRP J-38 Minature Key made by KA6IRL. Soild brass of over 30 parts on a wood base. This half size of a J-38. This is a real WORKING Key, mint condition, never used, in wooden box, $65. Mike Pierce KD8DVV H. Michael Pierce __ 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 Plasma TV and other non OT junque
I had a scare last weekend when my SDR-IQ showed a huge level of noise on the 500-KHz experimental band. The level was over 1000uV and drove the SDR into clipping with potential damage to the front end. This got me investigating with the K3 showing S9+60 full-tilt noise on 500-KHz. I checked how wide the noise was and observed it from 300-KHz up above 14-MHz. Strongest on MW freq. and 160m, S9+40 on 80m, tapering to S9 on 20m. Fortunately, it disappeared and has not returned. Maybe their favorite football team lost and the shut off the TV? Hopefully, they threw a beer bottle threw the screen. Of course it may not have been a plasma TV but a neighbor doing some welding at 10pm? I have buried utilities in the subdivision with electric poles about 1/4-mile away E or W and none for a mile N or S. Previous noise floor was S5 on 500-KHz with the K3, S3 on 80m and S2 on 20m. The SDR-IQ shows -115 to -108 dBm for the 500-KHz noise floor. 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-800*w, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com == *temp not in service __ 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: noise reduction performance
Hi James, I'd have to say that your post and the links to what you consider improvement firmly make the case for how subjective this is. Some folks simply cannot stand to listen to the warbling effect caused by the NR algorithm moving around the center of the passband to match the speech centers and reject the bands with noise only. What you are asking for is what they can't stand... K2 NR has that sound. The great problem of noise reduction design is the difference in the individual GOALS of using NR. For some, this is to remove the IRRITANT of noise, and for others to remove the UNINTELLIGIBILITY caused by noise. The latter goal produces different methods than the former. The former is doomed from the start because people's hearing range differs with SOME wide hearers intensely annoyed by high frequency noise, others used to listening to 80 meter QRN in the summer may want reduction with ZERO loss of weak signal, and others are very ANNOYED by reduction ARTIFACTS. For me it's just like anything else going on in firmware, I hope Wayne works on the stuff I want first, and that he keeps working on stuff. My list does not have NR improvement near the top. That's because there is a limit to what NR can do that does not mask very weak signals when it's on. NB is another story, and the t3-7 or t2-7 with sharp skirts effect on key clicks has allowed me to copy many signals where copy was not otherwise possible. I will have to agree with you on the volume issues, because I always NOTICE it. BUT, that falls in the IRRITANT category, not the INTELLIGIBILITY category. So I walk on by and wait for Lyle to figure out how to nullify plasma noise. I'm not holding my breath, but there really is a part of me that thinks he might. BTW, I turn NR *OFF* in contests, period. There is not a single NR setting that I cannot demonstrate a very weak signal loss, that occurs where the NR starts to blend with the noise. My ears, and everyone else's, will do a better job than the NR at that point. And particularly, now that we have APF for CW, hearing that tiny peep is all the clue I need to zero in the APF and get it out of the noise. NR on, and I don't even know it is there. I don't think anyone really knows (federal court worthy peer-reviewed scientific proof) how our ears hear discrete signals that are blending in the noise, but I have a suspicion. How many reading this have been driving home after a weekend CW contest and hear CW in the road noise? Our brains have some kind of heuristic anticipatory mechanism. It's the very one that allows me to copy the QRP in DL5QQ/QRP and struggle with the rest to my utter annoyance as he sends the /QRP over and over again. (Talk about irritating.) However it works, it is more effective than anything electronic by some orders of magnitude, and NR strips out what makes it work at the very point that the brain/ear makes the greatest difference. Others may disagree in a contest, just because they want to operate in comfort. That's fine by me, just don't apply for a seat in our WFO NY4A efforts, where our getting ALL the very weakest stuff is our score differential over the competion. If you work 2K+ contacts on 40m in the ARRL DX CW, you can be guaranteed that three or four or five HUNDRED of those contacts are too-far-away QRP, radio-trash crap antenna weak, or at the very edge of propagation where they hear your 1.5 kW above their noise, but their 100w and built-in -12 dB disadvantage puts them firmly IN the noise. Turning on NR in a CW contest can cost you hundreds of QSO's at a competitive station. ANYONE can work loud and medium stations. Try hard and most can work moderately weak. The last layer is only solved by the human brain, and the SOUND of it is irritating and tiring. Our in-the-noise hearing is likely honed by millions of years hearing the movement or breathing of a sabre-tooth tiger before it could spring. In that environment the false positive of my hearing CW in the road noise, e.g. hearing a sabre-tooth when there really wasn't one, was easily tolerated in favor of having one or two steps moving away before a real tiger charged. What a noise reduction designer is up against is nature honing something absolutely essential for millions of years, vs analysis in a very limited computing environment. And up against a wild variation in customer taste and tolerance for things audio. I'd say that if a box makes something sound like you like it, don't toss it until the new thing demonstrates what you like. There is no natural law that states that superior results for all problems will always be obtained processing at IF in a K3. They're doing it there because it fits in the scheme of all they're trying to do, and the means is commercially limited. On whole they've succeeded brilliantly, but there simply MUST be SOME things they can't do as well that way. 73, Guy. On Sat, Nov 27, 2010 at 7:16 AM, James Sarte (K2QI) k2qi@gmail.comwrote:
Re: [Elecraft] Elecraft Digest, Vol 79, Issue 52
Writelog supports having 2 instances of MMTTY, one decoding the main rx audio and one decoding the subrx audio. It has 2 frequency entry windows one for each rx so you can log the qso on the correct frquency. I got to use it in CQWW RTTY and it was very useful function Dave ww2r Date: Sat, 27 Nov 2010 08:14:45 -0500 From: Joe Subich, W4TV li...@subich.com Subject: Re: [Elecraft] [K3] Line out, speakers, and L-mix-R settings... To: elecraft@mailman.qth.net Message-ID: 4cf10445.1090...@subich.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The best way to handle RTTY with signals on both receivers is to run two copies of MMTTY (or other decoder) - one for reach receiver. MixW has a dual receive capability - I don't know about any of the other software. In general, one decoder uses the soundcard left channel and the second uses soundcard right channel audio. Mixing the two audio streams does not work ... it merely results in QRM. 73, ... Joe, W4TV On 11/27/2010 5:34 AM, Mike wrote: Re: point #2. I don't have a sub rx, so it's never been a problem for me, but I'm thinking of adding one. How does that work if there's a RTTY signal on both VFO's (simplex)? Would you have to tap AB? The manual sez Use CONFIG: LIN OUT to set the level, or to switch from a fixed-level setting to =PHONES. Does that give you a level control using the AF knob? 73, Mike NF4L On 11/26/2010 11:52 PM, Richard Ferch wrote: James, I hope your daughter is feeling better soon. Re your questions (based on my observations using sound card software on both channels from the LINE OUT jack, and stereo headphones plugged into the SPKRS jack): 1. The CONFIG:SPKRS setting only affects the rear panel SPKRS jack. It has no effect on LINE OUT. 2. None of the audio mixing or level controls has any effect on the LINE OUT signal, as far as I can tell. The left channel always carries the main RX output, and the right channel always carries the sub RX output. The LINE output is raw unmixed audio from the two receivers at a fixed level set by CONFIG:LIN OUT. 3. When CONFIG:SPKRS = 2, the SPKRS jack behaves the same as the headphone jacks. With SUB off, the main RX is in both channels, and with SUB on and the normal L-MIX-R setting, the main RX and sub RX are in left and right channels respectively. Changing the L-MIX-R setting affects the SPKRS the same way as it affects the PHONES output. When CONFIG:SPKRS = 1, the only speaker output is on the left channel of the SPKRS jack, i.e. it disables the right channel output even when SUB is on. If SUB is on, the external mono speaker on the left channel carries audio from both receivers mixed together, the same as the internal speaker. The purpose of the CONFIG:SPKRS = 1 option is to protect the speaker amp if a mono plug is plugged into the SPKRS jack. 73, Rich VE3KI __ 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: noise reduction performance
Rob, NR can be very effective on SSB depending on conditions, but it takes some careful adjustments. Try F7 through F8 settings and I also have to adjust Hi/Lo settings to improve readability of the audio. You can often reduce the watery effect and greatly improve overall readability on a noisy night. Doesn't work all the time -- depending on QRN conditions. I would say about 80% of the time I can achieve a noticeable improvement using NR on SSB when the noise is high. You're not trying to achieve best fidelity with this technique -- just improved readability. Dave, N4QS - Original Message - From: k...@baymoon.com To: James Sarte (K2QI) k2qi@gmail.com Cc: Elecraft elecraft@mailman.qth.net Sent: Saturday, November 27, 2010 10:07 AM Subject: Re: [Elecraft] K3: noise reduction performance I'm still getting my sea legs on the K3 but NR seems to work really great on CW but on SSB, I can't use it. With it on, regardless of setting, it makes the channel sound watery (for lack of a better term). I have two K3s, and both sound alike on phone with NR invoked. Maybe I don't have them adjusted properly, but I find the sound very disconcerting. Rob K6RB Hello Elecrafters, Regarding the issue of NR, I know this can be a touchy subject and most will say its very subjective. This post isn't intended as a complaint or criticism. Instead, I hope through constructive discussions, more improvements to the K3's NR performance will be realized. I'd like to begin by saying that Lyle and crew have a done a fantastic job to date with the K3's NR. I've had the privilege of watching the K3's NR function improve over time. The boys at Aptos should really be commended for listening to their customers. With that said, the recent CQSS has made me realize that there is still room for improvement. During the SS, I used NR extensively in combination with RF gain and filter hi-cut/lo-cut/shift settings. NR when used in combination with the aforementioned K3 adjustments can and does work well. The problem that I believe remains however is the algorithm used still seems too broad in its rejection calculations; what I mean is that SSB settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce noise while allowing speech patterns to remain unaffected. In other words, the DSP sounds like its reducing everything within its passband. To my ears, the NR doesn't seem to make speech pop out quite as effectively has other NR implementations. This can be seen by a not-so-subtle reduction in speech volume whenever the NR is turned on. The NR behavior is consistent regardless of AGC slope or threshold settings. Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. http://www.w4rt.com/BHI/20Mband-ssb.wav -- 73 de James K2QI President UNARC/4U1UN __ 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] FS: QRP J-38 Miniature Key
Speaking of J-38 keys, I have one without a knob - does anyone have one they would be willing to part with (the J37 was about the same), or know where I can find one at a reasonable price? Since this is OT, private replies would be best IMHO. 73, Don W3FPR On 11/27/2010 12:22 PM, Ron D'Eau Claire wrote: The miniature aspect dissuades me, but they appear to be beautiful pieces of work. Pictures and description at http://www.eham.net/reviews/detail/7262 I'll continue on with my ancient WWII J38 hand pump. Not as pretty but still works FB after more than a half-century of pounding and has its own special story. Ron AC7AC -Original Message- Selling a QRP J-38 Minature Key made by KA6IRL. Soild brass of over 30 parts on a wood base. This half size of a J-38. This is a real WORKING Key, mint condition, never used, in wooden box, $65. Mike Pierce KD8DVV H. Michael Pierce __ 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] Line out, speakers, and L-mix-R settings...
On Nov 27, 2010, at 11/275:14 AM, Joe Subich, W4TV wrote: MixW has a dual [RTTY] receive capability - I don't know about any of the other software. On the Mac OS X side, cocoaModem has two independent receive channels in the wideband RTTY and the dual RTTY interfaces. There are two identical sets of user interfaces in a single window -- this gets rid of the window focus problem of running multiple copies of a software modem. There are two cross ellipses, independent mark and space tones, baud rate, and filter settings -- you can even run 75 baud and Mark-only on one decoder, while running 45.45 baud and Mark/Space decoding on the other. In the case of wideband RTTY, there are independent waterfalls. Dual RTTY decode has been in practice in some time now. In the old days, it was done with multiple TU -- this is one of the reasons why normally sane people have multiple HAL ST-8000 in the shack. Just like other modes, having concurrent receive capability on on both the DX and a split pile reduces doubling. Using multiple TU back then required manually scanning the pileup using the VFO knob. If you have a waterfall that is watching the pile, you can pretty much pinpoint the DX's QSX by watching where a signal appears in the pileup waterfall right after the DX finishes sending his exchange. A software modem that is capable of agile transmit can then pounce on that QSX (or find the next hole in the direction the DX is tuning). It used to be like shooting fish in a barrel for people with two RTTY decoders and agile receive (e.g., waterfall tuning) to work the split RTTY pileups. Just ask RTTY DXers who have been using cocoaModem's wideband RTTY interface. But more people have that capability today (what with the Flex-5000 and the LP-PAN), to the point that if you don't have dual decoding and agile tuning capability, you are now at a distinct disadvantage. Of course you need a sound card that has two or more inputs (or a digital interface like the microKeyer/digiKeyer). Some of the cheaper digital interfaces are only wired for a single input channel, even when the codec is a stereo one. 73 Chen, W7AY __ 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] STRANGE PROBLEM
Hi, I own a K3 which seems to have developed a major problem. I had not used the K3 for just over six months due to pressure of work and when I decided to fire up again I decided to upgrade the firmware before starting to operate. I cleared all of the Elecraft software from my computer and started from scratch. I downloaded the latest version of the utility then downloaded the new Beta version of the firmware. The instalation seemed to go fine but when I did a restart by switvhing the radio off then back on I found the following:- The band switch does not work. The mode switch does not alter the modes but the test side changes the antenna from one to two and back. there is no menu the ant switch puts on the noise reduction and the rx/ant switch puts on the noise blanker. The press functions on the shift, width, speed/mic, cmp/pwr does not work. I cannot change vfo's and all of the pad buttons either do not work r they do things that they ought not do. if I press scan I go into Vox. the CWT switch alters between CMP and PWR ATUTUNE button alters the AGC the XMIT button switches the preamp on or off. I have tried to install an older version of the firmware but it does not cure any of the problems. The radio is number 1508 Please can you advise?? Tony Nightingale G3ZPU __ 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: noise reduction performance
Hi James, I know some don't agree with me on this, but I concur what you find. I know it is being picky. But I still like the Icom's DSP set to a very low level. It is not very aggressive at that setting and reduces the background noise to make it less tiring on SSB. And yes the SSB NR has significantly improved over time. Every year at Dayton I ask for something less aggressive than F5-1and that doesn't reduce the audio. Maybe I am not setting up the K3 properly that it seems to work for others? I know I have made enough goofs with operating this rig and others. I really do like the NR on CW. And did I say how happy I am with the APF? 73, N2TK, Tony #311 #1435 -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of James Sarte (K2QI) Sent: Saturday, November 27, 2010 7:16 AM To: Elecraft Subject: [Elecraft] K3: noise reduction performance Hello Elecrafters, Regarding the issue of NR, I know this can be a touchy subject and most will say its very subjective. This post isn't intended as a complaint or criticism. Instead, I hope through constructive discussions, more improvements to the K3's NR performance will be realized. I'd like to begin by saying that Lyle and crew have a done a fantastic job to date with the K3's NR. I've had the privilege of watching the K3's NR function improve over time. The boys at Aptos should really be commended for listening to their customers. With that said, the recent CQSS has made me realize that there is still room for improvement. During the SS, I used NR extensively in combination with RF gain and filter hi-cut/lo-cut/shift settings. NR when used in combination with the aforementioned K3 adjustments can and does work well. The problem that I believe remains however is the algorithm used still seems too broad in its rejection calculations; what I mean is that SSB settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce noise while allowing speech patterns to remain unaffected. In other words, the DSP sounds like its reducing everything within its passband. To my ears, the NR doesn't seem to make speech pop out quite as effectively has other NR implementations. This can be seen by a not-so-subtle reduction in speech volume whenever the NR is turned on. The NR behavior is consistent regardless of AGC slope or threshold settings. Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. http://www.w4rt.com/BHI/20Mband-ssb.wav -- 73 de James K2QI President UNARC/4U1UN __ 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] K3: noise reduction performance
Yes, there have been improvements in the DSP of K3. One of the reasons of selling my K3#46 was the artifacts of the DSP. I have recently acquired another K3 in the second hand market with later production. I do notice there have been improvements. I am mainly a phone operator with ocassional digital mode at PACTOR 3. Among the 4 x 8 =32 selections in the NR, I find it difficult to get one effective among the 32 choices. From my past and present experience of my Icom families, I know what are the limitations of NR. I am looking for a simple but effective NR which can cut 'some of the noise' with least artifacts, and also easy to work with. At this moment, I still prefer the NR in my Icoms. Having said that, I know the smart guys in Elecraft will keep on improving the K3 so that hopefully we will have better performance in later version of firmware. cheers, Johnny VR2XMC - 郵件原件 寄件人﹕ Ron D'Eau Claire r...@cobi.biz 收件人﹕ Elecraft Elecraft@mailman.qth.net 傳送日期﹕ 2010/11/28 (日) 12:14:47 AM 主題： Re: [Elecraft] K3: noise reduction performance This is a good example of just how subjective improvement can be. Sure, the hash is gone, but it's replaced by the underwater warbling sound so common with highly processed audio. Personally, I find that warbling variation in the audio far less pleasant than the noise. Ron AC7AC -Original Message- Below are several links to audio recordings of a product I used to own. It is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I should have hung on to it as it has become my benchmark for NR performance. These are some sample recordings of the ANEM being turned on and off. These recordings are found on W4RT's website 20 m SSB http://www.w4rt.com/BHI/20Mband-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80conv-ssb.wav 80 m SSB http://www.w4rt.com/BHI/80Mconv2-ssb.wav I've also compared the K3's NR performance to that of the Icom 756 Pro 3 which has similar NR reduction properties - albeit not as effective - as the ANEM. Perhaps I am being subjective or overly critical, but one thing you can easily notice with the ANEM recordings is that speech volume doesn't get as affected as the K3s. This is really surprising to me as the NR for the ANEM is AF rather than IF like what's used in our radios. This leads me to believe that the ANEM's NR algorithms are more effective in reducing background noise while leaving speech unaffected. What do you guys think? Sorry for the long email. Many thanks in advance for your ideas/suggestions. -- 73 de James K2QI President UNARC/4U1UN __ 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] STRANGE PROBLEM
Try reloading all the firmware, using the production (non-beta version) to see if your bandswitch comes back to life. When you load beta firmware, you're loading all the files, including MCU, FPF, and DSP, right? The symptoms you have are similar to those when the MCU doesn't have the expected FPF version installed. 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tony Nightingale Sent: Saturday, November 27, 2010 10:38 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] STRANGE PROBLEM Hi, I own a K3 which seems to have developed a major problem. I had not used the K3 for just over six months due to pressure of work and when I decided to fire up again I decided to upgrade the firmware before starting to operate. I cleared all of the Elecraft software from my computer and started from scratch. I downloaded the latest version of the utility then downloaded the new Beta version of the firmware. The instalation seemed to go fine but when I did a restart by switvhing the radio off then back on I found the following:- The band switch does not work. The mode switch does not alter the modes but the test side changes the antenna from one to two and back. there is no menu the ant switch puts on the noise reduction and the rx/ant switch puts on the noise blanker. The press functions on the shift, width, speed/mic, cmp/pwr does not work. I cannot change vfo's and all of the pad buttons either do not work r they do things that they ought not do. if I press scan I go into Vox. the CWT switch alters between CMP and PWR ATUTUNE button alters the AGC the XMIT button switches the preamp on or off. I have tried to install an older version of the firmware but it does not cure any of the problems. The radio is number 1508 Please can you advise?? Tony Nightingale G3ZPU __ 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] Plasma TV Noise any ideas on how to filter it out. [Moderator's note]
Folks, we are getting further off-topic as this thread morphs into a regulatory and government/manufacturer discussion. Please end that portion and just focus on technical methods to remedy interference. Also, take note, when there are a very large number of postings on any thread, as there are on this one, please resist the urge to post unless really adding significant info to the discussion. Me-too and other repetitive postings are strongly discouraged in the interest of limiting email overload for other readers. If this thread continues at the current level of postings it will be closed soon. 73, Eric Elecraft List Modulator www.elecraft.com _..._ On Nov 26, 2010, at 2:20 PM, Don Wilhelm w3...@embarqmail.com wrote: It is a shame that there is not more FCC enforcement directed at manufacturers rather than at consumers. Have you ever tried to convince a consumer that his expensive TV is producing radiation that is interfering with your ham radio? Talk about getting that deer in the headlights stare! The worst thing that the FCC could have done is regulate the consumer (don't use it if it causes interference). Consumers just cannot believe that anything they have purchased would create a problem for others. __ 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] J-38 Miniature Key
- Original Message - From: Don Wilhelm w3...@embarqmail.com Subject: Re: [Elecraft] FS: QRP J-38 Miniature Key Speaking of J-38 keys, I have one without a knob - does anyone have one they would be willing to part with (the J37 was about the same), or know where I can find one at a reasonable price? Don, I think other Elecraft owners would want to know too If you Google J38 key you will find a wealth of info including replacement parts. 72 Ron, wb1hga __ 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] J-38 Miniature Key
Thanks Ron. One has been offered by a list member who had a spare. 73, Don W3FPR On 11/27/2010 1:59 PM, roncasa wrote: - Original Message - From: Don Wilhelmw3...@embarqmail.com Subject: Re: [Elecraft] FS: QRP J-38 Miniature Key Speaking of J-38 keys, I have one without a knob - does anyone have one they would be willing to part with (the J37 was about the same), or know where I can find one at a reasonable price? Don, I think other Elecraft owners would want to know too If you Google J38 key you will find a wealth of info including replacement parts. 72 Ron, wb1hga __ 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 Plasma TV and other non OT junque
Along this line of discussion, I wonder if those who have the KRX3 could use it as a noise cancelling receiver (similar to the anc-4)? If the aux receiver output in diversity mode could be reverse phased to cancel noise using a noise sniffer antenna. I realise that would eliminate use of the aux Rx for other uses but in the face of extreme noise interference would that matter? -- Message: 39 Date: Fri, 26 Nov 2010 23:11:25 -0500 From: Steve Ellington n...@carolina.rr.com Subject: Re: [Elecraft] K3 Plasma TV and other non OT junque To: Tommy Alderman alderm...@windstream.net, elecraft@mailman.qth.net Message-ID: aa3cd1468b6140f686cf241019b48...@steve Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Tom: The same thing would happen if you went to Spain or Starkville, MS. I've got the K3 and have some QRM from a plasma. The NB doesn't seem to respond well although it sounds very similar to your typical AC power line noise. I wonder if Elecraft might have a plasma nearby and could run some test on the K3 NB possibly making some custom changes? Steve N4LQ 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-800*w, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com == *temp not in service __ 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 power error
Hi My K3 has a strange behaver on out output Hf power When start a transmitting in a carrier mode (e.g. Cw or FSK rtty) there is an output peek above the power level have set. Also when transmitting around 30-40 watt range there are short burst of power up to 80 watt. The build-in RF meter shows those peeks too. There is a noise coming out of the compartment of the KPA3 when this toke place. A close inspection of the KPA3 doesn't show any thing strange. Any idea where to look at? Peter PC2A __ 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] STRANGE PROBLEMS RE-VISITED
Hi Guys, Thanks to your responses I think we have solved the problem. The two gentlemen who suggested that the problem might be the switches on the front panel sticking on and shorting out the panel were correct. I have spent about 15 mins just tapping on the four switches and eventually the CMP/PWR switch came on and the rest of the switches started to work. It has defaulted a couple of time but I am hoping that it will be back to normal soon. perhaps Elecraft might have something to say. (I love this readio and would not like to have long term probs with it) many thanks chaps. de G3ZPU AKA Tony __ 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] Plasma TV Noise any ideas on how to filter it out. [Moderator's note]
Hi, I am sorry Eric but I need to correct a mistake of mine. I was referring to FCC Part 95 in a previous post. As pointed out to me in a private E-mail to me this should be Part 15. This is the regulation that enables manufacturers to ship anything they want as long as they plaster this message on the back of the product: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Modifications not expressly approved by the manufacturer could void the user's authority to operated the equipment under FCC rules. I promise to be quiet on this particular beef of mine now. :-) AB2TC - Knut Eric Swartz WA6HHQ - Elecraft wrote: Folks, we are getting further off-topic as this thread morphs into a regulatory and government/manufacturer discussion. Please end that portion and just focus on technical methods to remedy interference. Also, take note, when there are a very large number of postings on any thread, as there are on this one, please resist the urge to post unless really adding significant info to the discussion. Me-too and other repetitive postings are strongly discouraged in the interest of limiting email overload for other readers. If this thread continues at the current level of postings it will be closed soon. 73, Eric Elecraft List Modulator www.elecraft.com _..._ snip -- View this message in context: http://elecraft.365791.n2.nabble.com/Plasma-TV-Noise-any-ideas-on-how-to-filter-it-out-tp5775346p5780549.html Sent from the [HAM] 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] FS: LP-Pan + EMU0202
For sale: factory built LP-Pan with EMU 0202 for K3, with all needed cables. Best offer. Jeff N6GQ __ 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] Plasma TV Noise any ideas on how to filter it out. [Moderator's note]
As pointed out to me in a private E-mail to me this should be Part 15. This is the regulation that enables manufacturers to ship anything they want as long as they plaster this message on the back of the product: Part 15 does not allow manufacturers to intentionally ship anything that radiates excessive EMI. All microprocessor based consumer equipment is required to be tested/pass for both radiated and conducted EMI. This is generally done with prototype production equipment. The Part 15 statement does not relieve the owner and manufacturer from responsibility for the radiation and the FCC should get involved with complaints about interference to licensed stations. 73, ... Joe, W4TV On 11/27/2010 5:13 PM, ab2tc wrote: Hi, I am sorry Eric but I need to correct a mistake of mine. I was referring to FCC Part 95 in a previous post. As pointed out to me in a private E-mail to me this should be Part 15. This is the regulation that enables manufacturers to ship anything they want as long as they plaster this message on the back of the product: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. Modifications not expressly approved by the manufacturer could void the user's authority to operated the equipment under FCC rules. I promise to be quiet on this particular beef of mine now. :-) AB2TC - Knut Eric Swartz WA6HHQ - Elecraft wrote: Folks, we are getting further off-topic as this thread morphs into a regulatory and government/manufacturer discussion. Please end that portion and just focus on technical methods to remedy interference. Also, take note, when there are a very large number of postings on any thread, as there are on this one, please resist the urge to post unless really adding significant info to the discussion. Me-too and other repetitive postings are strongly discouraged in the interest of limiting email overload for other readers. If this thread continues at the current level of postings it will be closed soon. 73, Eric Elecraft List Modulator www.elecraft.com _..._ snip __ 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] Diversity Receive as Noise Canceling? (was K3 Plasma TV and other non OT junque)
Hi Ed, That's a good question. I've wondered that myself. Perhaps some more knowledgeable will chime in. 73, Dick - KA5KKT Along this line of discussion, I wonder if those who have the KRX3 could use it as a noise cancelling receiver (similar to the anc-4)? If the aux receiver output in diversity mode could be reverse phased to cancel noise using a noise sniffer antenna. I realise that would eliminate use of the aux Rx for other uses but in the face of extreme noise interference would that matter? __ 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] Diversity Receive as Noise Canceling? (was K3 Plasma TV and other non OT junque)
Dick, Most of the noise cancelling systems reverse the phase of one of the antennas and feed the combined result to the receiver, If the noise antenna receives only noise, the noise will disappear and only the signal will be present, but in practice, the noise antenna picks up some signal too, and will attenuate the signal to the extent of the signal pickup on the noise antenna. In theory, it should work equally well at the output of two receivers each being fed from separate antennas. Of course, with two full receivers involved, the complexity of adjustments to achieve the same amplitude on each receiver becomes more of a challenge, and the phasing adjustment requirements for the noise antenna are still present. For those interested in trying it, I would suggest that you use the brain to do the final filtering and simply swap the speaker or headphone connections of one channel to observe the results. If you remember phasing of stereo speakers, then you will understand how just reversing the speaker (or headphone) leads will result in cancellation or re-enforcement of sound. So what I am saying is that it should be relatively easy to try - let us know the results. 73, Don W3FPR On 11/27/2010 6:00 PM, Edward Dickinson, III wrote: Hi Ed, That's a good question. I've wondered that myself. Perhaps some more knowledgeable will chime in. __ 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] Diversity Receive as Noise Canceling?
I am not familiar with the ANC-4, but I assume it is similar to the MFJ noise cancellers. Those units are not receivers but work with the weak antenna signals at the originally transmitted frequencies. Aside from some signal buffering, such a unit essentially provides the capability to continuously adjust the phase difference and relative gain between the two inputs, and to do this at a wide variety of ham band frequencies. If you instead feed the two antennas into twin receivers, you would have to adjust amplitude and phase at the output. At audio frequency it is hard enough to build a phase shifting network that maintains constant phase shift over a reasonable audio frequency range, but if you want to make that phase shift continuously knob adjustable it becomes really hard. The DSP in the K3 has potential as a precision phase shifter, but consider that the frequency-dependent phase shifts that may be caused by the different xtal filter specimens and analog components in each receiver may have already messed up the phase relationships by the time the signal gets to DSP or receiver output. 73, Erik K7TV __ 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] Elecraft SSB net announcement
The weekly Elecraft SSB net will meet tomorrow (11/28/10) at 1800z on 14.314 MHz. I will be net control from western Oregon, and I will try to swing the antenna in multiple directions to get as many of you as I can. We'll try back east calling stations and relays too. See you then. 73, Phil NS7P __ 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] Walmart Plasma Test
I would think you drew some strange looks from the Black Friday gang...hi tom wb2qdg - Original Message - From: Steve Ellington n...@carolina.rr.com To: Elecraft@mailman.qth.net Sent: Friday, November 26, 2010 5:05 PM Subject: [Elecraft] Walmart Plasma Test Today I paid a visit to Walmarts TV department. I brought along my portable AM radio. While tuned to a spot on the AM BC band, I walked along the row of dozens of flat screen TVs. There must be at least 50 of them! Suddenly the noise level jumped to a loud roar. I looked at the 42 set next to me and sure enough, it was a plasma. I started checking every set. Every plasma produced the loud QRM while every LCD/LED was quiet. There are not many plasma sets left but every brand was horrible. The noise sounds exactly like your typical power line noise but you can hear the pitch change as the video scene changes. When the screen goes totally black, like between commercials, the frequency changes greatly. I ran the little radio around the screen and really couldn't tell that the QRM was stronger at any given position. I'm fairly certain now that what I'm hearing on 80m is a plasma tv from my neighbor. Now I just have to figure out a way to approach them about replacing it. I may end up buying them one! Steve N4LQ __ 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] Elecraft CW Net Announcement
Good Evening, After a hectic week it is time to announce the next session of the CW net. Soon after the last net was completed I made and ate dinner. Luckily for me the power did not go out until I was done eating. I had lost my telephone a few days earlier so I could not call in the outage when it started. I was hoping the break was far below me so others were effected. Just yesterday the phone company finally got up here to fix the problem. Good thing the power outage only lasted two days. I received 15 inches of snow but it was dry so there was little problem moving it. However, my Ranger is two wheel drive so I could not get it out to the road let alone into town. I started up the 4WD truck and got into town. Mostly to see folks walking around and to get mail. I was able to talk to the phone repair folks directly since they were sitting in their trucks in the grocery store's parking lot. Next came the melt which made travel on Thanksgiving day impossible. Driving down a 10 percent grade on wet ice is mildly exciting with a small vehicle. With my F250 it gets very exciting :) It's even more fun going uphill in that rig and having it break loose. Skidding on ice downhill backwards is always good when your heart needs a little adrenalin pump. I was able to get on the air once or twice during the week finding the snow covered limbs shorting my antenna did not make a lot of difference. Yesterday the snow melted in the rain clearing off the trees but the snow started again today around noon and the fir trees were loading again as the sun set. Hopefully the antenna will still be up tomorrow afternoon and the wet trees won't effect the SWR too much. We shall see. Please join us tomorrow afternoon and evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Monday 0100z (Sunday 5 PM PST) 7045 kHz Stay well, Kevin. KD5ONS - - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1170 / Virus Database: 426/3284 - Release Date: 11/27/10 __ 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] Plasma TV Noise any ideas on how to filter it out.
I don't know what plasma TV RFI signatures look like, but here is something that shows up every morning at about 08:00 local time and stays with me until about 22:30 every evening here in Arlington, TX. I can't work 30m in the day time unless the signals are above S-7 :o( http://www.n5ge.com/images/10100_10150_RFI_at%20N5GE.bmp Any one have an idea what it is? It completely covers the 30m band plus above and below. The signal shown in the image. It doesn't appear on any other bands. 73, Tom Childers Radio Amateur N5GE Licensed since 1976 QCWA Member 35102 ARRL Life Member On Fri, 26 Nov 2010 09:37:04 GMT, Stewart stew...@baker.nildram.co.uk wrote: In the UK there have been many complaints about RFI from Panasonic Plasma TV's. Some people have had success in getting the problem resolved, generally by the entire screen assembly being changed out. Others have received the same sort of response as you. Luckily my neighbour who had a very noisy one recently moved away. [snip] __ 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] Plasma TV and other OT junque
Tom, I share you're frustration, but have found a solution. I use an email program called Agent that allows me to set Kill filters on the subjects and other parts of emails. When I find that a thread doesn't interest me, I will set a kill filter for it that expires in 30 days. Problem solved... It keeps me from being a grumpy old man ;o) 73, Tom Childers Radio Amateur N5GE Licensed since 1976 QCWA Member 35102 ARRL Life Member On Fri, 26 Nov 2010 18:48:29 -0500, Tommy Alderman alderm...@windstream.net wrote: I have been mistaken (again)! I was under the impression this was basically an Elecraft technical, or at least semi-technical reflector? Last week I was in France and when I returned, I had over 860 emails. Of those 860 emails, 580 were on this reflector! Of those 580 emails, exactly 27 had something to do with technical information about Elecraft products! As a relatively new K3/P3 owner I seriously question this reflectors ability to provide Elecraft technical assistance when so much totally OT topics are discussed ad-infinitum. I respectfully urge each of you to think about what you are doing - please! 73, Tom - W4BQF __ 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] J38 knobs
Reasonable is a matter of opinion but there are usually J38 knobs listed on ebay. I bought one to have as a backup. I think I paid about $5 for it which some may not find reasonable after seeing barrels of J38s for 50 cents each in the 1950s. Willis 'Cookie' Cooke K5EWJ From: Don Wilhelm w3...@embarqmail.com To: Ron D'Eau Claire r...@cobi.biz Cc: elecraft@mailman.qth.net Sent: Sat, November 27, 2010 12:27:16 PM Subject: Re: [Elecraft] FS: QRP J-38 Miniature Key Speaking of J-38 keys, I have one without a knob - does anyone have one they would be willing to part with (the J37 was about the same), or know where I can find one at a reasonable price? Since this is OT, private replies would be best IMHO. 73, Don W3FPR On 11/27/2010 12:22 PM, Ron D'Eau Claire wrote: The miniature aspect dissuades me, but they appear to be beautiful pieces of work. Pictures and description at http://www.eham.net/reviews/detail/7262 I'll continue on with my ancient WWII J38 hand pump. Not as pretty but still works FB after more than a half-century of pounding and has its own special story. Ron AC7AC -Original Message- Selling a QRP J-38 Minature Key made by KA6IRL. Soild brass of over 30 parts on a wood base. This half size of a J-38. This is a real WORKING Key, mint condition, never used, in wooden box, $65. Mike Pierce KD8DVV H. Michael Pierce __ 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
