Re: [Elecraft] attenuator in amp was Re: K3 and Expert 1K-FA
When the K3 came out there was a big deal about the default ALC polarity that resulted in a mod. Will the default connections of the KPA500 work with an un-moded radio or will we need the mod? David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com Date: Wed, 21 Apr 2010 14:00:02 To: d.cut...@ntlworld.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] attenuator in amp was Re: K3 and Expert 1K-FA Probably the biggest issue is getting rid of the 70 watts of added heat. If there's someplace in the exiting airstream to put these resistors 73, doug From: David Cutter d.cut...@ntlworld.com Date: Wed, 21 Apr 2010 18:54:21 +0100 T0-220 style power film resistors are fairly cheap and can easily be mounted on heat-sinking surfaces. David G3UNA Hm, I wonder if the KPA500 has or can have provision for this. That amp can be driven to full output by 30 watts or so, IIRC. With the K3 (or K2), power control could be done automatically by having the amp tell the radio that it's active over the serial interface, but it's clear the KPA500 has much provision for being used with radios other than the K3. 73, doug Tom W8JI wrote: The correct approach would be an attenuator pad so the radio could run at near full power and not have a chance of overdriving the amp, ... I don't understand why more people don't do that. For example, a 3 dB attenuator between the transceiver and amplifier ensures that a 100W exciter won't overdrive an amplifier that requires 50W of drive. The 3 dB loss on receive is hardly ever an issue but if you're worried about it, just put the attenuator inside the amplifier, after the T/R relay. Seems like a simple, foolproof 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 __ 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] P3 color selection (was Re: time to order your P3, design details?)
Very nicely done. Thanks for sharing the thought that went into it. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Alan Bloom n...@cds1.net Date: Mon, 19 Apr 2010 19:41:22 To: k6...@foothill.net Cc: Elecraft Reflectorelecraft@mailman.qth.net Subject: [Elecraft] P3 color selection (was Re: time to order your P3, design details?) Hi Fred, I thought for quite awhile about what to do about vision-impaired users of the P3. I couldn't think of any way that a blind or severely visually-impaired person would be able to get any significant benefit from a panadapter so I finally decided not to attempt to make it usable by the blind. However color blindness is another story. Many of Elecraft's customers are older males and, like me, have some degree of color blindness. I have tried to take that into account in the color scheme used in the P3. The following information comes from the Color_blindness page on Wikipedia. There are three types of cones (color receptors) in the retina that have peaks in different parts of the spectrum: blue, green and red. (The so-called red peak is actually more like orange/yellow.) The three spectral responses overlap considerably. The eye measures the response of each type of cone and interpolates to figure out what the actual color must be. Color blind does not necessarily mean blind to colors but rather an inability to perceive differences between some of the colors that others can distinguish. There are many types of color blindness, but the most common (affecting about 9% of adult males) are the so-called red-green hereditary (genetic) photoreceptor disorders, all of which make it difficult to discriminate reds, yellows and greens from one another. There are other types of color blindness that make it difficult to distinguish between blue and yellow, but they are less common. I have tried to make the default colors accommodate people with red-green color blindness. That means making sure that markings and their backgrounds never both come from the red-green end of the spectrum. It also means avoiding small objects and thin lines with such colors (even with a blue background) because many color-blind people can see the problem colors much better if the object has some mass to it. It helps that this is the kind of color blindness that I have, so if it looks good to me it should look good to others with red-green color blindness. In addition, to accommodate people with other types of color blindness including those with monochromacy (total color blindness) the lines and text on the spectrum display are all bright colors with a dark background so they should look good in greyscale. The waterfall display is more difficult since the different colors are used to indicate different signal strengths, but weak signals are represented by dark colors so there is still some ability to discern variations in signal strength. Fortunately colors are trivial to change in firmware, so if we get it wrong at first it is easy to change later. Alan N1AL On Mon, 2010-04-19 at 14:51 -0700, Fred Jensen wrote: Al Lorona wrote: That is really pretty, but my prevailing thought was that perhaps it's just too much eye candy-- which really doesn't make interpreting the data any easier. The spectrum readout-- arguably the most important area of the screen-- is difficult to concentrate on with the distraction of the other detail (color, shading, texture, 3D effects, text, labels, buttons, controls) of the skin. How much of the P3 display information will I miss? I have no color vision. 73, Fred K6DGW - Northern California Contest Club - CU in the 2010 Cal QSO Party 2-3 Oct 2010 - www.cqp.org __ 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] 40m Net Band plan
There is a significant difference between US band plans, and those of other nations in the region. This has been causing increasing animosity between the different groups. Some authorized SSB and others CW in the same frequency band. Please note, I am not saying one is right and the other isn't, just noting the issue. Regardless, I agree, the best plan is to ignore purposeful QRM. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry __ 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 -extended- low end Bass response back in next betarelease
There are no bugs! Merely undocumented features ;) David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: pd0psb p.s.bijp...@gmail.com Date: Fri, 28 Aug 2009 14:02:08 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 -extended- low end Bass response back in next beta release This is strange... A lot of people (including me) have noticed and pointed out K3's initial lack of LF response compared to other sets. Also, a lot of energy has been put into finding causesremedies both by users and developers. Now *a solution* is presented as a pleasant coincedental combination of FW data. Is the K3 really starting to make its own decisions for the future beyond control of its talented fathers? Or is this an Okay, you guys out there were quite right about this LF matter in disguise? In any case:Happy to hear those vocal cord frequencies coming through now...A huge step forward. Tnx for the hard work. 73' Paul PD0PSB Eric Swartz -WA6HHQ, Elecraft wrote: For those of you that noticed the unexpected increase in low end bass response in the last release, and then its removal in the current release, stay tuned. We are properly including it in in the next beta release. In the prior beta test release it was an unexpected bug/side effect that only appeared with the .1 Hz setting of the PBT control. We were pleasantly surprised at this and are now properly adding it so it is available in general. 73, Eric __ 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 -- View this message in context: http://n2.nabble.com/K3-extended-low-end-Bass-response-back-in-next-beta-release-tp3535988p3536743.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 - Hardware needed P3
Thanks for the notice of the price increase. With that in mind, will additional hardware be needed on the K3? David Wilburn NM4M Sent from my Verizon Wireless BlackBerry __ 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 P3 thought
That would be impressive. You would not need it all the time. Could have a high isolation RF coax switch to switch it in when needed. David Wilburn NM4M --Original Message-- From: Bob W9RFS Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 P3 thought Sent: Aug 19, 2009 01:26 Being able to use the P3 as a station monitor durring TX would be great! Could it be possible to see the RF envelope; modulation; RF compression/clipping? Could be a very nice tool. Bob W9RFS -- View this message in context: http://n2.nabble.com/K3-P3-thought-tp3468007p3470510.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Sent from my Verizon Wireless BlackBerry __ 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] P3 display of K3 filter bandwidth and other information
Don't stop, I'm getting all tingly. David Wilburn NM4M --Original Message-- From: Wayne Burdick Sender: elecraft-boun...@mailman.qth.net To: Elecraft Reflector Subject: [Elecraft] P3 display of K3 filter bandwidth and other information Sent: Aug 17, 2009 14:58 The P3 is connected to the K3 at a point ahead of the crystal filters, so when you change crystal filters on the K3, it won't change the P3's displayed waveform. However, the P3 will be aware of the K3's filter bandwidth and offset, so we can show a bracketed or otherwise highlighted area on the P3 display that reflects the filter settings. We could show both the DSP and crystal bandwidth using different colors. Going farther out on a limb: The P3 could highlight ham-band edges and band segments, even by license class, programmable by country. It could mix spectral and waterfall displays with decoded text. You could assign a function switch as an auto-tune switch for PSK31 -- etc., etc. (Somebody stop me!) 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Sent from my Verizon Wireless BlackBerry __ 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] Heavy P3
Are the dimensions firm enough that you can release them? I'm re-org'ing the
shack and I want to leave enoug room.
David Wilburn
NM4M
--Original Message--
From: Ralph Parker
Sender: elecraft-boun...@mailman.qth.net
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Heavy P3
Sent: Aug 17, 2009 15:51
... P3 Elecraft could provide an internal 1 kw dummy load.
Or maybe a colour-coordinated brick? ('color' for US readers)
I'd tend to put the P3 on the left, so it would be in front of my face
while I tuned the K3 with my right hand. For those of you yet to experience
a spectral display, I think you'll find that you watch it more than the
frequency display.
VE7XF
__
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Sent from my Verizon Wireless BlackBerry
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Re: [Elecraft] P3 Photo
http://www.elecraft.com/K3/pics/P3%20w%20K3%20a.JPG David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Jorge Diez - CX6VM cx6vm.jo...@adinet.com.uy Date: Sun, 16 Aug 2009 10:04:34 To: 'Paul Christensen'w...@arrl.net; elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 Photo Hello, where is a link to see the P3? I am in www.elecraft.com but not find photos of the P3. 73, Jorge CX6VM -Mensaje original- De: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] En nombre de Paul Christensen Enviado el: Domingo, 16 de Agosto de 2009 08:37 a.m. Para: elecraft@mailman.qth.net Asunto: Re: [Elecraft] P3 Photo Although the P3 product is still in development, it looks like a very attractive and functional matching accessory for the K3. A few questions: - What is the typical MDS seen on the display? - Is a low-noise, unity-gain buffer w/ BPF utilized at the I.F. input? - Assuming it's powered from the K3 or alternate +12VDC source, what is the measured amount of current (thinking ahead for portable operation)? - Any photos of the tentative back panel available? Although I probably would have opted for a stand-alone black box device (and hoping that may be an alternate version one day), I can see the marketing logic where a large number of potential purchasers are looking for a transceiver with a built-in panadapter. Even though the P3 is a stand-alone unit, it appears to be well-integrated with the K3 to give it a built-in look and feel. This should put the K3 in the running for buyers who would otherwise purchase the K3 but for the fact that it lacks a built-in panadapter. Paul, W9AC __ 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 new V3.25 NR not so good for CW week signal
What is the best way of determining the gain setting? Seem to recall an app for this. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 15:51:46 To: Merv Schweigertk...@flex.com Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal Not saying I'd do it. (and I'm not with the 8 filters I have in my radio) but one can if thats what they wish to do. ~Brett On Sat, 2009-08-15 at 12:42 -1000, Merv Schweigert wrote: Not really, if you read the recommendations for the filters you will notice that caution is warranted for setting the gain higher than recommended, for IMD prevention if I remember correct. Kind of like the Inrad roofing filters, in some cases the gain is set to high and causes more IMD than without the filter. Some Inrad roofers for the FT-1000D had too much gain and the radio was worse with them installed than without. W8JI had some measurements on those issues. Merv KH7C This is sorta already there if you have multiple roofing filters. You can define the gain that is added when each filter kicks in. On Sat, 2009-08-15 at 13:50 -0600, William Carver wrote: I've noticed in homebrew receivers as the bandwidth narrowed, shedding noise and QRM I preferred the gain to go up, increaseing the in-passband signal amplitude. I always attributed it to formative years with a Heathkit Q multiplier. It may be an effect similar to AGC with adjustable flatness (May 1996 analog circuit, in DSP of K3). I found I preferred to have strong signals sound louder rather than perfectly flat. Prolly a psycho-acoustic explanation (or maybe just get my head examined?). In firmware one could increase the audio gain by an adjustable amount as the IF bandwidth was decreased, with an operator-settable scaling number. Say 0 = gain independent of bandwidth, to 100 = gain multiplied by K * (2800/DSP bandwidth). Very similar to the AGC rise scaling. That sounds good to me. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal
I understand where to set the values. I'm asking how to empirically determine the value to use? David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 19:19:02 To: dave.wilb...@verizon.net Cc: elecraft-boun...@mailman.qth.net; Merv Schweigertk...@flex.com; Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal You can pull this off by looking at the filter setup in the K3Config utility or you can find it in the menu of the K3. ~Brett (KC7OTG) On Sun, 2009-08-16 at 02:12 +, dave.wilb...@verizon.net wrote: What is the best way of determining the gain setting? Seem to recall an app for this. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 15:51:46 To: Merv Schweigertk...@flex.com Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal Not saying I'd do it. (and I'm not with the 8 filters I have in my radio) but one can if thats what they wish to do. ~Brett On Sat, 2009-08-15 at 12:42 -1000, Merv Schweigert wrote: Not really, if you read the recommendations for the filters you will notice that caution is warranted for setting the gain higher than recommended, for IMD prevention if I remember correct. Kind of like the Inrad roofing filters, in some cases the gain is set to high and causes more IMD than without the filter. Some Inrad roofers for the FT-1000D had too much gain and the radio was worse with them installed than without. W8JI had some measurements on those issues. Merv KH7C This is sorta already there if you have multiple roofing filters. You can define the gain that is added when each filter kicks in. On Sat, 2009-08-15 at 13:50 -0600, William Carver wrote: I've noticed in homebrew receivers as the bandwidth narrowed, shedding noise and QRM I preferred the gain to go up, increaseing the in-passband signal amplitude. I always attributed it to formative years with a Heathkit Q multiplier. It may be an effect similar to AGC with adjustable flatness (May 1996 analog circuit, in DSP of K3). I found I preferred to have strong signals sound louder rather than perfectly flat. Prolly a psycho-acoustic explanation (or maybe just get my head examined?). In firmware one could increase the audio gain by an adjustable amount as the IF bandwidth was decreased, with an operator-settable scaling number. Say 0 = gain independent of bandwidth, to 100 = gain multiplied by K * (2800/DSP bandwidth). Very similar to the AGC rise scaling. That sounds good to me. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal
Tnx David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Merv Schweigert k...@flex.com Date: Sat, 15 Aug 2009 16:29:47 To: dave.wilb...@verizon.net Cc: Brett Howardbr...@livecomputers.com; elecraft-boun...@mailman.qth.net; Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal dave.wilb...@verizon.net wrote: What is the best way of determining the gain setting? Seem to recall an app for this. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry Perhaps this is what you were looking for Dave, [Elecraft] On K3 crystal filter gain compensation (FLx GN) wayne burdick Mon, 15 Jun 2009 12:26:43 -0700 Lately there has been some discussion about how much gain to add when compensating for loss in the K3's individual crystal filters. The general guideline is as little as possible. I'd suggest starting with 0 and working up to as high as a few dB only if it seems necessary. Narrow bandwidths themselves create a psychoacoustic gain effect, so you don't really have to make up for the entire loss relative to wide filters. Also, excessive gain can in extreme cases worsen the performance of DSP signal processing, such as noise reduction (NR). Finally, AGC tends to flatten signal amplitudes in general, further reducing the need for per-filter compensation. While I'm on this topic, I'd also like to suggest using a minimum of both RX and TX EQ. The '0' levels were carefully determined empirically, and in most cases the optimal values will be well below the maximum range provided. Unless you have an aural sensitivity issue in some pitch range, or a serious mic deficiency, I'd stay between +/- 6 dB. As with filter gain settings, excessive values can result in adverse interaction with the DSP. And yes, there will be per-mode RX EQ in a future firmware revision. Thanks for all the suggestions on this. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal
Sounds good. Tnx David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 20:21:22 To: dave.wilb...@verizon.net Cc: elecraft-boun...@mailman.qth.net; Merv Schweigertk...@flex.com; Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal Well you can follow the convention that is mentioned I believe in the manual and use the values outlined there. Or find a steady signal on the air (or connect a signal generator) and use the AFV feature to determine the level and detect the reduction in signal level as you adjust through the filters and then you'll know how many dB delta you have between filters. ~Brett PS: The real answer to this question is to put in as little gain as it takes to make you happy and no more. The less you can use the better. On Sun, 2009-08-16 at 02:45 +, dave.wilb...@verizon.net wrote: I understand where to set the values. I'm asking how to empirically determine the value to use? David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 19:19:02 To: dave.wilb...@verizon.net Cc: elecraft-boun...@mailman.qth.net; Merv Schweigertk...@flex.com; Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal You can pull this off by looking at the filter setup in the K3Config utility or you can find it in the menu of the K3. ~Brett (KC7OTG) On Sun, 2009-08-16 at 02:12 +, dave.wilb...@verizon.net wrote: What is the best way of determining the gain setting? Seem to recall an app for this. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Brett Howard br...@livecomputers.com Date: Sat, 15 Aug 2009 15:51:46 To: Merv Schweigertk...@flex.com Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 new V3.25 NR not so good for CW week signal Not saying I'd do it. (and I'm not with the 8 filters I have in my radio) but one can if thats what they wish to do. ~Brett On Sat, 2009-08-15 at 12:42 -1000, Merv Schweigert wrote: Not really, if you read the recommendations for the filters you will notice that caution is warranted for setting the gain higher than recommended, for IMD prevention if I remember correct. Kind of like the Inrad roofing filters, in some cases the gain is set to high and causes more IMD than without the filter. Some Inrad roofers for the FT-1000D had too much gain and the radio was worse with them installed than without. W8JI had some measurements on those issues. Merv KH7C This is sorta already there if you have multiple roofing filters. You can define the gain that is added when each filter kicks in. On Sat, 2009-08-15 at 13:50 -0600, William Carver wrote: I've noticed in homebrew receivers as the bandwidth narrowed, shedding noise and QRM I preferred the gain to go up, increaseing the in-passband signal amplitude. I always attributed it to formative years with a Heathkit Q multiplier. It may be an effect similar to AGC with adjustable flatness (May 1996 analog circuit, in DSP of K3). I found I preferred to have strong signals sound louder rather than perfectly flat. Prolly a psycho-acoustic explanation (or maybe just get my head examined?). In firmware one could increase the audio gain by an adjustable amount as the IF bandwidth was decreased, with an operator-settable scaling number. Say 0 = gain independent of bandwidth, to 100 = gain multiplied by K * (2800/DSP bandwidth). Very similar to the AGC rise scaling. That sounds good to me. __ 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
Re: [Elecraft] P3 Critics
I understand the sentiment, but Elecraft does want to hear the good and the bad. This is what makes them different. As they have aptly stated, they are big boys (no slight meant to lisa ans company) and they can take. I look forward to a panadaptor in most any iteration. I haven't seen one since I worked on them on B52G/H's. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: Bill Miner w...@yahoo.com Date: Thu, 13 Aug 2009 10:17:45 To: Elecraft@mailman.qth.net Subject: [Elecraft] P3 Critics It is amazing to me how there can be so much criticism of the P3 before it has even been put into production and released for sale The P3 is fully integrated with the K3, and stand-alone (no computer needed). It's the same height and depth as the K3, and about 6 wide -- plenty of extra room inside for a power supply, battery, or other accessories. The display is fast and bright, with a very wide viewing angle. 73, Wayne, N6KR Eric, WA6HHQ THANKS Wayne and Eric. That is just exactly what I was hoping for. Sounds PERFECT. Can't wait to get one! 73, Bill - K6WLM KX1 K2 K3/100 The following is a quote from a recent eHam review: Which brings me to another issue. While I commend Elecraft for its customer service, it appears that the K3 is now being designed to satisfy the squeaky wheels on the reflector. There seems to be a large number of owners who want a custom radio, and will stop at nothing in order to get the company to change the firmware so it suits their individual tastes. It seems as though the firmware beta changes are arriving more and more frequently. This is both good and bad. While it is nice to see the improvements, I think that it is getting to be a little overwhelming (and wonder about the utility of many of the improvements). It appears that many are to simply satisfy the vocal minority. I'd rather see Elecraft survey its entire user base as to what things might be changed, rather than the (highly) vocal few that populate the reflector. __ 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] Off-Topic: CW sending vs. receiving speed
I fully agree. I'm fairly new (in comparison) at this. My sweet spot 18 wpm. If the speed creeps up and we wander from the basics, I get in trouble quick. Luckily I can't yet send much faster than I can receive. 73 David Wilburn NM4M --Original Message-- From: Ricky Robbins Sender: elecraft-boun...@mailman.qth.net To: Elecraft_List Subject: Re: [Elecraft] Off-Topic: CW sending vs. receiving speed Sent: Aug 7, 2009 13:50 Is it logical to assume that a person's CW sending speed approximates their copy speed? Well, it's *logical* - that just doesn't always mean it's true. :) After a long period of inactivity, my copy speed right now is about 10 wpm, but I can send considerably faster and I have to keep reminding myself to send at about 10 wpm to avoid getting it sent back to me at a faster speed than I can copy. I can copy faster than 10 wpm when receiving the standard RST, Name, QTH, Rig, etc., but if you start telling me about your late grandmother's bursitis woes or the cabbage worm grief in your garden I probably won't be able to keep up. The problem is when I'm sending with a straight key I tend to creep up in speed without realizing it, get it back at the faster speed, and then cut QSO's short because I always feel it's impolite to ask the other fellow to QRS when *I'm* the one who sped us up in the first place. The aforementioned ticks me off (at myself), because I'm a ragchewer and when we move off of the formula and get into cabbage grandmas is when I start getting more interested in the di-dahversation. I keep thinking the speed will come back, but I don't think it's coming back at the rate it came originally some thirty years ago. Rick N4YQP __ 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 Sent from my Verizon Wireless BlackBerry __ 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] Off-Topic: CW sending vs. recieving speed
Your inability to perceive the problem is (likely) directly proportional to the years you have been doing code. ;) I did code mobile for the first time recently. Coming back from dropping my son off at Camp Lejeune. It was the New Eng. QSO party. My paddles were the buttons on the mic of a 706. It was lots of listening up front. Then just reply to their call. I didn't try running a freq while driving. You have to save something to shoot for. David Wilburn NM4M Sent from my Verizon Wireless BlackBerry -Original Message- From: .k8dd. k...@inbox.com Date: Fri, 07 Aug 2009 17:43:55 To: Grant Youngmann...@tx.rr.com Cc: Elecraft_List Reflectorelecraft@mailman.qth.net Subject: Re: [Elecraft] Off-Topic: CW sending vs. recieving speed I've never understood that line of thought. Why would you take target practice at little tykes? That's unreal. On the other hand people will talk on cell phones while driving and people will pick up a microphone and talk on 2m. That's all ok. But talk about talking on cw . You don't have a cell phone or a microphone to drop if things go wrong - just take your hand off the key or paddle and let it sit there. And what's the difference between copying phone or CW in your head? That's not an argument either! I've just never understood the comments that get made about mobile CW. 73 :^] HankK8DD Grant Youngman wrote: Hmmm .. I can't use my cell phone when driving through a school zone here, even with a hands-free. I wonder if I could get away with taking target practice at the little tykes walking to school while sending mobile CW :-) Grant/NQ5T always sent around 25-30 WPM. I could never send as well as I could copy when mobile, due to the car bouncing off potholes, other vehicles, etc. ;-) As I got older, my sending speed fell below my copy speed even at home. Regardless, unless I get a QRS request, I assume someone answering my CQ can copy the speed I used. GET FREE 5GB EMAIL - Check out spam free email with many cool features! Visit http://www.inbox.com/email to find out more! __ 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] kool-aid
Oh Yyya!! ((Que Koolaid guy busting through wall) I got my mat at Radio Shack David Wilburn NM4M --Original Message-- From: travistowns...@sbcglobal.net Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net ReplyTo: travistowns...@sbcglobal.net Subject: [Elecraft] kool-aid Sent: Jul 31, 2009 14:43 i think i may have just drank the kool- aid. i placed my order for a k3. dale is a most helpful gentleman!! i am coming to the k3 from a ft one. my first question to the list is where in the world can a fellar get an anti-static mat? i have looked at digikey and mouser both. i am either looking in the wrong places or they don't have any. a good day to all!73's __ 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 Sent from my Verizon Wireless BlackBerry __ 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] RTTY Dual PB
The first time I used it I was able to dig out one rtty signal that was mixed in with another that was on a slightly different freq. Though I have not been successful with it since then. Dave Wilburn NM4M --Original Message-- From: k...@aol.com Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net Subject: [Elecraft] RTTY Dual PB Sent: Jul 22, 2009 16:30 My question addresses RTTY (FSK D) and the Dual PB capability. I understand the theory of what is being done, but I have yet to see the advantage of Dual PB on an RTTY signal as opposed to normal passband. I am curious if any of the RTTY ops have seen a definite advantage of using Dual PB over normal passband tuning. 73, Steve, K4FJ K3 #290 __ 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 Sent from my Verizon Wireless BlackBerry __ 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] Simple question about the K2
Rotate the knob titled keyer. Dave Wilburn NM4M --Original Message-- From: Hector Padron Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net Subject: [Elecraft] Simple question about the K2 Sent: Jul 19, 2009 11:15 Maybe I am blind but I have been reading the factory manual and also the nifty manual that came with my K2 that arrived yesterday morning and I am really enchanted with it but I can't find anywhere how to change the CW keyer speed,I am a qsk op and I need to set it up faster,can anyone tell me how to set it up? Thanks AD4C The difference between genius and stupidity is that genius has its limits.. -- Albert Einstein __ 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 Sent from my Verizon Wireless BlackBerry __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 S meter
One possibility, there was a mod that setup one of the LEDs to flash when u are zero beat. Dave Wilburn NM4M --Original Message-- From: pkhjr Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net Subject: [Elecraft] [K2] K2 S meter Sent: Jul 18, 2009 19:36 I'm the new owner of a K2 (4864) which I did not build and love the radio. Everything works as it should from what I can tell so far. One question on the S Meter, the far right led or 40 over led seems to flash most of the time in CW not so much in SSB. Can't seem to find anything in the manuals. Did the Cal for meter no change? Tnx Tex -- View this message in context: http://n2.nabble.com/K2-S-meter-tp3282589p3282589.html Sent from the [K2] 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 Sent from my Verizon Wireless BlackBerry __ 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] Happy New Year
Don Wilhelm wrote: I know this is 3 hours early for those on the left coast, but we greeted 2008 a few minutes ago here in North Carolina. Best wishes for a Happy and prosperous New Year to us all. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com 73 es hpy nw yr de k4dgw Dave Wilburn ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
