Re: [Elecraft] KPA500
>From: "Vic K2VCO" >Obviously I haven't tried it (!) but I suspect that the >external magnetic field from a >toroidal transformer is much less extensive than that of the >usual laminated type. Tom W8JI wrote: >Don't bet on it. :-) > Tom and I discussed this on the AMPS reflector, back in 2007. Flux leakage from a toroidal winding at 50/60Hz is MUCH less of a concern than it is with toroids at RF. The specific question on AMPS was whether two toroidal transformers can be stacked closely together without magnetic interaction, and the answer was: Yes, they can. With two identical toroidal transformers sitting one on top of the other, I connected 230V AC to the primary of one and measured only a few millivolts on the open-circuit primary of the other. That isn't quite the same topic as the flux leakage from a single large transformer, but it's a good indication that leakage can be very low indeed. Obviously the answer will also depend on the quality of design and construction, not only in the transformer but also in the rest of the amplifier, because flux leakage is also affected by the external connecting wires. For the lowest possible flux leakage, it is important to minimize the physical size of the 'coupling loops' created by the connecting wires, especially if the stray magnetic fields can also interact with a steel chassis. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __ 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] : Re: News from Visalia! (:-))
> I'm just stating my opinion that, in the big picture, the > price point for the KPA500 seems a bit on the high side for > what you get. Now seeing photos, its certainly better > looking than my ALS600. And the build quality is probably > better than my Ameritron product, but for that power level, > and taking into account the value of my time if I had to > build it, the cost is a bit high in my opinion. Taking this one step further, the KPA-500 may have an updated design - after all the ALS-600 is a close copy of Granberg's 20 year old design (Motorola Engineering Bulletin # 104) - but other than the microprocessor control in the KPA-500, the bill of materials should be fairly similar for the KPA-500 and the ALS-600. The FETs in the KPA-500 will be slightly more expensive (2 x $87 in the KPA-500 vs. 4 x $36 in the ALS-600 for Q=1000) but the differences should be offset at least in part by easier assembly and calibration. I would expect the KPA-500 to sell for no more than 20% above the street price of the ALS-600 with linear supply. Any more than that is difficult to justify ... after all, a watt is a watt. 73, ... Joe Subich, W4TV > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Luis V. Romero > Sent: Monday, April 19, 2010 11:51 PM > To: 'Jim Brown' > Cc: 'Elecraft' > Subject: [Elecraft] : Re: News from Visalia! (:-)) > > > I wrote that statement, Jim: > > I'm just stating my opinion that, in the big picture, the > price point for the KPA500 seems a bit on the high side for > what you get. Now seeing photos, its certainly better > looking than my ALS600. And the build quality is probably > better than my Ameritron product, but for that power level, > and taking into account the value of my time if I had to > build it, the cost is a bit high in my opinion. > > I'm not in this to have a pretty shack to impress my friends > with lots of lights, gingerbread and ham status symbols. If > I were into that, I would take out a 2nd mortgage and buy a > 7800/PW1. :) > > Maybe I'm "cheap", maybe not. After all, I do own a rather > well equipped K3. But with two kids in college and a > mortgage payment in today's economy, what I have does an > admirable job. I did have to do "final QC" on my ALS600, and > I did have to integrate a band decoder to it to switch bands > from the radio, and I did have to install Phil AD5X's > marvelous little QSK board, but the K3/ALS600/MFJ998 > combination I currently operate does exactly what it needs to > do with little fuss and surprisingly high reliability at a > very reasonable price point. > > While its true that you get what you pay for, as I used to > say when I was in TV and purchased EFP cameras instead of the > 5 times more expensive studio versions of the same thing for > my station. "Nobody at home can see the difference". > > It would be nice to have a matching amp and panadapter to go > with my K3. The Panadapter is well priced for what you get, > what it is, and for its computer-less feature set, and I will > probably end up with one of those next year. > > The KPA500, in my personal environment, is not. > > Again, my opinion, and your mileage will indeed vary. > Matching boxes are not high on my priority list because, > well, "You cant hear the difference at home". > > -lu-w4lt- > > > Date: Mon, 19 Apr 2010 09:59:58 -0700 > From: "Jim Brown" > Subject: Re: [Elecraft] News from Visalia! (:-)) > To: "Elecraft" > Message-ID: <2010041917.2a58c58...@gw1.nlenet.net> > Content-Type: text/plain; charset="us-ascii" > > On Sun, 18 Apr 2010 16:16:58 -0400, Terry Posey wrote: > > >ALS600 with the Linear Power supply, AD5X Full Break In mod and an > >external bandswitching accessory plus an MFJ998 would come in > >considerably under the $2,000 price. > > Do I understand that you are equating MFJ with Elecraft? > That's quite a > stretch! While I have great respect for W8JI's engineering, > that does not > extend to MFJ's manufacturing, and Ameritron has common > ownership with MFJ. > :) > > I can also buy at least twenty different models of 100 watt > HF transceiver > for much less than the cost of a K3. Yet I OWN two K3s. > > I just returned from Visalia. The exhibit hall included large booths > showing Icom and Yaesu rigs. The Elecraft booth was JAMMED > from the minute > the doors opened until they closed. The Yaesu and Icom booths > had only > modest traffic, and were oftn next to deserted. > > 73, > > Jim K9YC > __ 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] News from Visalia! (:-))
Hello Doug, Can I suppose there is no ATU inside the KPA500? In other words, should I allow extra $ budget for an ATU to work with KPA500? cheers, Johnny VR2XMC - 郵件原件 寄件人﹕ Doug Faunt N6TQS +1-510-655-8604 收件人﹕ elecraft@mailman.qth.net 傳送日期﹕ 2010/4/20 (二) 12:40:10 PM 主題： Re: [Elecraft] : Re: News from Visalia! (:-)) On Mon, 19 Apr 2010 23:51:08 -0400, Luis V. Romero wrote: >Maybe I'm "cheap", maybe not. Certainly, for some of us, the small size is worth some premium. Those who are comparing the KPA500 to a ALS-600 should take note that it's less than 1/3 the volume, and about the same weight as the ALS-600S. 73, doug __ 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 Information Page now on Elecraft Web Page
Woohoo! Has a time line been set for when the P3's assembly manual will be posted on the website? k6osx -- View this message in context: http://n2.nabble.com/P3-Information-Page-now-on-Elecraft-Web-Page-tp4928848p4929390.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] : Re: News from Visalia! (:-))
On Mon, 19 Apr 2010 23:51:08 -0400, Luis V. Romero wrote: >Maybe I'm "cheap", maybe not. Certainly, for some of us, the small size is worth some premium. Those who are comparing the KPA500 to a ALS-600 should take note that it's less than 1/3 the volume, and about the same weight as the ALS-600S. 73, doug __ 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] time to order your P3, design details?
That version of PowerSDR is not optimized for panadapter use. Like anything, there are a variety of SDR programs around. The latest PowerSDR/IF Stage svn from WU2X & W1CEG can fill the screen with just the pan display (or waterfall or panafall). You can also add a VFO/S-Meter strip and/or Band/Mode buttons. No clutter, huge pan display, just the most needed controls. Here are some examples... http://www.telepostinc.com/psdr35_collapsed_2a.png http://www.telepostinc.com/DSCN0583f.jpg 73, Larry N8LP > Date: Mon, 19 Apr 2010 11:26:09 -0700 (PDT) From: Al Lorona > Subject: Re: [Elecraft] time to order your P3, > design details? To: elecraft@mailman.qth.net Message-ID: > <990531.32803...@web82607.mail.mud.yahoo.com> Content-Type: > text/plain; charset=iso-8859-1 >> >?To get you started, look at ... >> > http://www.youtube.com/watch?v=q_Fom1QwNa4&feature=related ? >> > > 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. > > I really believe?simpler is better. Let me illustrate by example. The last > time you flew on a Boeing 767 this is what the pilots saw on the flight deck: > http://www.airliners.net/photo/Continental-Airlines/Boeing-767-424-ER/070/&sid=0444c7e1280e36facb8845d82b29142f?? > > > Many?of you?would perhaps laugh at such a?simplistic 1970s display and would > find excuses not to pay money for it in 2010.?But this is certainly a > mission-critical application where simpler displays mean quick, efficient > interpretation by the pilots in whose hands we place our lives. They gotta be > able to glance and read the situation instantly, without having to twiddle or > read a lot of controls. > > I know I'm comparing apples and oranges. And I know I'm sounding like an old > guy. But the trend in radios-- whether traditional or SDR-- is certainly > going towards more and more eye candy. These fancier and fancier GUIs (and > front panels) can start to make one dizzy. If it doesn't have at least?four > blue LEDs and?two or three?irregular-shaped pink buttons, people won't buy > it, I guess! > > The display of the P3 shares many characteristics with the 767 display. > Without getting into any of the pro-computer/ anti-computer arguments, this > is one reason why I like the way the P3 has been laid out. > > I kinda like simple and uncluttered. If it's good enough for the captain of a > 767, it's good enough for 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
Re: [Elecraft] : Re: News from Visalia! (:-))
On Mon, 19 Apr 2010 23:51:08 -0400, Luis V. Romero wrote: >Maybe I'm "cheap", maybe not. Almost all of us have had to get by with what we could afford for most, if not all, of our lives, and most of us still do. I've been a ham since 1955. The first rig I bought new was a Heath Apache in 1958 -- two summer's worth of jobs. The secons was a Ten Tec Omni A in 1980. The third was a K3 in 2008. I've also owned a few new VHF rigs. Every other piece of ham gear I own was used by at least one other ham before me. But it's all "good stuff" -- products of top quality, well engineered. 73, Jim K9YC __ 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?)
On Apr 19, 2010, at 11:56 PM, Kok Chen wrote: > Most users, unless they read the source code, probably doesn't know that > there is some method to the madness of the color scheme. No, but those of us that have read the code in the process of writing our own waterfalls appreciate the careful attention and research, as well as the sharing of the code. > 73 > Chen, W7AY -- Jeremy McDermond (NH6Z) Xenotropic Systems mcde...@xenotropic.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] P3 color selection (was Re: time to order your P3, design details?)
This web page is intended for web designers, but is useful for designing any color based user interface: http://www.iamcal.com/toys/colors/ It lets a person with "normal" color vision see what people with various color deficiencies see. For example, when you check the various common anomalies on the web page, you can see that a dark blue background with a bright yellow foreground can be distinguished by most people. But a green and red combination could be hard to distinguish by someone that has Protanopia or Deutanopia. Now you know why some digital interfaces' waterfall display are done using the blue/yellow color scheme :-) cocoaModem's waterfall uses deep blue for very low level signals, transitioning to lighter blue and then to progressively brighter yellow as the signal becomes stronger, then to orange and finally ending up with bright red when the signal gets close to saturating the sound card. Most users, unless they read the source code, probably doesn't know that there is some method to the madness of the color scheme. 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] : Re: News from Visalia! (:-))
I wrote that statement, Jim: I'm just stating my opinion that, in the big picture, the price point for the KPA500 seems a bit on the high side for what you get. Now seeing photos, its certainly better looking than my ALS600. And the build quality is probably better than my Ameritron product, but for that power level, and taking into account the value of my time if I had to build it, the cost is a bit high in my opinion. I'm not in this to have a pretty shack to impress my friends with lots of lights, gingerbread and ham status symbols. If I were into that, I would take out a 2nd mortgage and buy a 7800/PW1. :) Maybe I'm "cheap", maybe not. After all, I do own a rather well equipped K3. But with two kids in college and a mortgage payment in today's economy, what I have does an admirable job. I did have to do "final QC" on my ALS600, and I did have to integrate a band decoder to it to switch bands from the radio, and I did have to install Phil AD5X's marvelous little QSK board, but the K3/ALS600/MFJ998 combination I currently operate does exactly what it needs to do with little fuss and surprisingly high reliability at a very reasonable price point. While its true that you get what you pay for, as I used to say when I was in TV and purchased EFP cameras instead of the 5 times more expensive studio versions of the same thing for my station. "Nobody at home can see the difference". It would be nice to have a matching amp and panadapter to go with my K3. The Panadapter is well priced for what you get, what it is, and for its computer-less feature set, and I will probably end up with one of those next year. The KPA500, in my personal environment, is not. Again, my opinion, and your mileage will indeed vary. Matching boxes are not high on my priority list because, well, "You cant hear the difference at home". -lu-w4lt- Date: Mon, 19 Apr 2010 09:59:58 -0700 From: "Jim Brown" Subject: Re: [Elecraft] News from Visalia! (:-)) To: "Elecraft" Message-ID: <2010041917.2a58c58...@gw1.nlenet.net> Content-Type: text/plain; charset="us-ascii" On Sun, 18 Apr 2010 16:16:58 -0400, Terry Posey wrote: >ALS600 with the Linear Power supply, AD5X Full Break In mod and an >external bandswitching accessory plus an MFJ998 would come in considerably >under the $2,000 price. Do I understand that you are equating MFJ with Elecraft? That's quite a stretch! While I have great respect for W8JI's engineering, that does not extend to MFJ's manufacturing, and Ameritron has common ownership with MFJ. :) I can also buy at least twenty different models of 100 watt HF transceiver for much less than the cost of a K3. Yet I OWN two K3s. I just returned from Visalia. The exhibit hall included large booths showing Icom and Yaesu rigs. The Elecraft booth was JAMMED from the minute the doors opened until they closed. The Yaesu and Icom booths had only modest traffic, and were oftn next to deserted. 73, Jim K9YC No virus found in this outgoing message Checked by PC Tools AntiVirus (6.1.0.25 - 6.14780). http://www.pctools.com/free-antivirus/ __ 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 Date: Mon, 19 Apr 2010 19:41:22 To: Cc: Elecraft Reflector 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
Re: [Elecraft] Snap-On Ferrites and RF Noise On 160M
On Apr 19, 2010, at 12:37 PM, Jim Brown wrote: > On Sun, 18 Apr 2010 19:00:19 -0400, Bill Coleman wrote: > >> I found that putting a snap-on ferrite core around the power cord reduced >> the spur to an S5 indication. A similar reduction could be had by placing > >> snap-on ferrite around the power output leads. > > Study my tutorial on RFI and ferrites. > > http://audiosystemsgroup.com/RFI-Ham.pdf > > Most snap-on ferrites are designed for maximum effectiveness in the 150 MHz > range. ANY "snap-on" ferrite is next to useless on 160M unless multiple > turns are wound around it. Please read the whole posting. The snap-on ferrite was used as a diagnostic tool. It showed a reduction in the unwanted signal on both the AC mains and the output power leads. Even if the snap-on ferrite was not the optimal final solution, it was useful in identifying where the energy was being radiated from the box. I did not use snap-on ferrites in my eventual solution to reduce the RFI. Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 __ 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] Remotable external tuner
Hi Ken.
Do you think it is possible for Elecraft to acquire influence with a not yet
mature autotuner manufacturer and provide guidance in a manner beneficial to
Elecraft enthusiasts?
73,
Dick - KA5KKT
All of the above ("below" actually) for me as well, but please, not just a
500W model. Way too expensive. Looking at SGC's website as an example, a
500W remote autotuner costs 3 times as much as a 100W model and twice as
much as a 200W unit.
Maybe you can make power rating an option...with the brains of the tuner on
one board and the brawny, power-rated components on a separate board? Order
the combination of boards to match your circumstances. Just a thought.
73,
Ken Alexander
VE3HLS
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Re: [Elecraft] Remotable external tuner
All of the above ("below" actually) for me as well, but please, not just a 500W
model. Way too expensive. Looking at SGC's website as an example, a 500W
remote autotuner costs 3 times as much as a 100W model and twice as much as a
200W unit.
Maybe you can make power rating an option...with the brains of the tuner on one
board and the brawny, power-rated components on a separate board? Order the
combination of boards to match your circumstances. Just a thought.
73,
Ken Alexander
VE3HLS
--- On Tue, 4/20/10, WB5BKL wrote:
> From: WB5BKL
> Subject: Re: [Elecraft] Remotable external tuner
> To: elecraft@mailman.qth.net
> Date: Tuesday, April 20, 2010, 2:01 AM
> Yes, please.
>
> Remotable, balanced/unbalanced, weatherproof, Elecraft.
>
> It doesn't have to be 500W for me - but I will take
> whatever Elecraft
> comes up with.
>
> cln
> WB5BKL
>
>
> On Sat, 2010-04-17 at 19:42 -0400, elecraft-requ...@mailman.qth.net
> wrote:
>
> >
> ..as it holds out the possibility of an external 500W
> > > Elecraft tuner! Make it
> remotable, capable of driving a balanced or
> > > unbalanced load and
> weatherproof, please ;>)
> > >
> > > 73
> Craig AC0DS
> > >
>
>
> __
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>
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>
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Re: [Elecraft] P3 shipping status query
According to the order page: http://www.elecraft.com/elecraft_prod_list.htm#k3 they start shipping July 15th. Bob NW8L On Mon, Apr 19, 2010 at 8:33 PM, David F. Reed wrote: > for those of us who already first day ordered our P3s, when might we > anticipate their shipping? > Or, failing that, when might we see the P3 added to th shipping status page? > > Not trying to rush things, just being curious. > > 73 de Dave, W5SV > __ > 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] 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] P3 shipping status query
for those of us who already first day ordered our P3s, when might we anticipate their shipping? Or, failing that, when might we see the P3 added to th shipping status page? Not trying to rush things, just being curious. 73 de Dave, W5SV __ 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] Remotable external tuner
Yes, please. Remotable, balanced/unbalanced, weatherproof, Elecraft. It doesn't have to be 500W for me - but I will take whatever Elecraft comes up with. cln WB5BKL On Sat, 2010-04-17 at 19:42 -0400, elecraft-requ...@mailman.qth.net wrote: >..as it holds out the possibility of an external 500W > > Elecraft tuner! Make it remotable, capable of driving a balanced or > > unbalanced load and weatherproof, please ;>) > > > > 73Craig AC0DS > > __ 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] OT: Identify Transistor
In this drawing the dashed line is a dimension line. Paul K7PM __ 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] switching from vfo a to b in sync am
I noticed the other night while listening to the gran ole opry on the k3, that when I pressed the a/b (keypad 1) button to switch to radio havana on 5970, got a longer beep and nothing happened. But, when on a ham band, a/b worked fine. Am I missing something, or is this a bug? __ 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 Information Page now on Elecraft Web Page
Not at this time. 73, Eric On 4/19/2010 6:23 PM, Wes Stewart wrote: > Are the screen colors be user selectable? > > > --- On Mon, 4/19/10, Eric Swartz - WA6HHQ, Elecraft wrote: > > >> From: Eric Swartz - WA6HHQ, Elecraft >> Subject: [Elecraft] P3 Information Page now on Elecraft Web Page >> To: "Elecraft Reflector" >> Date: Monday, April 19, 2010, 7:08 PM >> We've now recovered from the Visalia >> DX convention and have uploaded the >> P3 Panadapter information page to the Elecraft web page. >> >> The direct P3 info page link is: >> >> http://www.elecraft.com/P3/p3.htm >> >> 73, Eric WA6HHQ >> >> __ >> 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 Information Page now on Elecraft Web Page
Are the screen colors be user selectable? --- On Mon, 4/19/10, Eric Swartz - WA6HHQ, Elecraft wrote: > From: Eric Swartz - WA6HHQ, Elecraft > Subject: [Elecraft] P3 Information Page now on Elecraft Web Page > To: "Elecraft Reflector" > Date: Monday, April 19, 2010, 7:08 PM > We've now recovered from the Visalia > DX convention and have uploaded the > P3 Panadapter information page to the Elecraft web page. > > The direct P3 info page link is: > > http://www.elecraft.com/P3/p3.htm > > 73, Eric WA6HHQ > > __ > 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] Grounding negative side of power supply?
Refer to the NEC. It's their rule. As a side note, a loss of property covered by insurance may be dissallowed if they find improper grounding contributed to the damage. And they reference the NEC with regard to "proper". 73 Bob, K4TAX - Original Message - From: "Jim Brown" To: "Elecraft List" Sent: Monday, April 19, 2010 7:49 PM Subject: Re: [Elecraft] Grounding negative side of power supply? > On Mon, 19 Apr 2010 19:36:29 -0500, Bob McGraw - K4TAX wrote: > >>Now, with the radio connected between the receiving >>antenna and the AC mains, the path for the current difference is through >>the >>radio and power supply. > > I'm with Tom on this one. Here's why. First, remember that lightning is > NOT > DC, it is RF, with spectra VERY broadly centered around 1 MH. Second, the > coax from the antenna MUST be bonded to the building entry panel, and from > there to all the house grounds. Third, the coax from the RX antenna SHOULD > have at least one big honker ferrite choke on it at the antenna end, and > another near the station. In other words, there should be at least several > K > ohms in series with the coax at the frequency of lightning. That causes > lightning to seek a lower impedance path to earth than one through the > house > (and the shack). Like the ground rod at the antenna. > > Bottom line -- I don't see a bond helping lightning safety, and as Tom has > noted, it sure doesn't help with RX noise. > > 73, > > Jim K9YC > > > __ > 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] KPA500
Hi Tom, Please expand on your comment. I had the same thought as Vic. Why wouldn't a toroidal power transformer have less magnetic field coupling to external circuits than a conventional E/I core transformer? 73 -- Joe KB8AP On Apr 19, 2010, at 5:38 PM, Tom W8JI wrote: > Don't bet on it. :-) > > > << > - Original Message - > From: "Vic K2VCO" > Obviously I haven't tried it (!) but I suspect that the > external magnetic field from a > toroidal transformer is much less extensive than that of the > usual laminated type. >>> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] k2 power control fault
Hi friends today the K2 ATU behaved in crazy way. But that is another problem! After 2 second tuning (always swr=5) , the k2 switched off. I switched on again the radio but now the power control does not work. In qrp mode it give 20 watts , in qro mode give 100 watts. no way to control the power output. the power meter does not work. no dots in tx mode. Please anyone could give some suggest to fix the problem. thanks luca __ 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] P3 Information Page now on Elecraft Web Page
We've now recovered from the Visalia DX convention and have uploaded the P3 Panadapter information page to the Elecraft web page. The direct P3 info page link is: http://www.elecraft.com/P3/p3.htm 73, Eric WA6HHQ __ 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] Grounding negative side of power supply?
On Mon, 19 Apr 2010 19:36:29 -0500, Bob McGraw - K4TAX wrote: >Now, with the radio connected between the receiving >antenna and the AC mains, the path for the current difference is through the >radio and power supply. I'm with Tom on this one. Here's why. First, remember that lightning is NOT DC, it is RF, with spectra VERY broadly centered around 1 MH. Second, the coax from the antenna MUST be bonded to the building entry panel, and from there to all the house grounds. Third, the coax from the RX antenna SHOULD have at least one big honker ferrite choke on it at the antenna end, and another near the station. In other words, there should be at least several K ohms in series with the coax at the frequency of lightning. That causes lightning to seek a lower impedance path to earth than one through the house (and the shack). Like the ground rod at the antenna. Bottom line -- I don't see a bond helping lightning safety, and as Tom has noted, it sure doesn't help with RX noise. 73, Jim K9YC __ 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] KPA500
Don't bet on it. :-) << - Original Message - From: "Vic K2VCO" Obviously I haven't tried it (!) but I suspect that the external magnetic field from a toroidal transformer is much less extensive than that of the usual laminated type. >> __ 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] OT: Identify Transistor
Don Rasmussen wrote: > Help please - in this diagram, the bottom most drawing shows the Source Drain > and Gate in a triangle configuration. > > http://www.nteinc.com/specs/100to199/pdf/nte133.pdf > > Is the view from top down or looking from below the circle that is the > transistor case? > just hazarding a guess here Don generally in mechanical drawings when looking straight on at something, it is drawn as solid lines when it is seen 'through' an item, it is drawn as dotted lines, representing hidden or invisible lines so I'd say the view was from the bottom -- GB & 73 K5OAI Sam Morgan __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Grounding negative side of power supply?
To Tom, Bill and all: I never said anything about a "direct" strike. Don't bother trying to protect for a direct strike. Nothing will survive a direct strike. The problem is two ground points, separated by some distance of earth be it 5 ft, 50 ft or 500 ft. During a nearby strike the energy from the nearby strike is dissipated largely across the surface of the earth up to a depth of some 18" to 24". Due to resistance between the two ground points and the energy flowing through the earth there will be a difference in potential between the two points. Now, with the radio connected between the receiving antenna and the AC mains, the path for the current difference is through the radio and power supply. It's your radio, it's your choice. You decide. 73 Bob, K4TAX - Original Message - From: "Tom W8JI" To: ; "Bill Coleman" Cc: Sent: Monday, April 19, 2010 12:03 AM Subject: Re: [Elecraft] Grounding negative side of power supply? > This appears to be a question from January 20, 2010, so it > is a little late, but a person never wants to connect the > ground rod of the K9AY antenna or any other small or low > receiving antenna to the mains ground. > > First, it would kill the advantage of having the antenna. If > you are going to do that, don't bother installing the > antenna. It will hurt the antenna in more than one way. > > Second, it is not necessary for safety. It is not a large > tall structure and is not likely at all to be involved with > a direct lightning hit, and even if it were hit the ground > at the cable entrance to the house would provide all the > required protection. > > The shack ground and the antenna entrance ground should be > bonded to the mains, but the K9AY or any other low noise > receiving array must have an isolated ground. The cable > leaving the receiving antenna should be buried, should have > common mode isolation, and should be grounded at the house > entrance to a ground that is bonded to the mains ground. > > 73 Tom > > > - Original Message - > From: "Robert Mcgraw" > To: "Bill Coleman" > Cc: ; > Sent: Sunday, April 18, 2010 10:35 PM > Subject: Re: [Elecraft] Grounding negative side of power > supply? > > > Yes, do provide a driven ground for the K9AY receiving > antenna. This is > required for lightning protection. AND be sure to bond this > ground to > the AC mains ground for the house. Failure to do this will > produce a > voltage difference or step voltage between the two ground > during a nearby > lightning strike. The voltage difference can be enough to > damage or > destroy the radio connected between the antenna and the AC > power. AND, > bonding of all grounds to a common point is a requirement of > the NEC. > > Remember, lighting has traveled through several thousand > feet of air. A > balun will offer little to no protection in this regard. > Now placing a > choke balun or a 1:1 current balun at the feed point will > reduce common > mode noise on the coax feed line. > > 73 > Bob, K4TAX > > > >> >> On Jan 20, 2010, at 11:47 PM, Richard S. Lindzen wrote: >> >>> Dear Don, >>> >>> This leaves me a bit concerned. I am planning to put up >>> a K9AY >>> receiving antenna in my backyard and it is supposed to be >>> connected >>> to a ground rod. I had never seen it suggested that this >>> must be >>> connected to the utility ground stake. I'm not even sure >>> where the >>> utility ground stake is. I've never noticed one though I >>> will ask my >>> electrician. If there is one, it is likely to be pretty >>> far from the >>> K9AY. >> >> For the K9AY, your best bet is to make sure the antenna >> ground and the >> coax ground are completely isolated. I do this by >> magnetically coupling >> the coax with a 9:1 transformer. Otherwise, common-mode >> noise can move >> out the shield and be picked up by the antenna. >> >> Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net >> Web: http://boringhamradiopart.blogspot.com >> Quote: "Not within a thousand years will man ever fly!" >> -- Wilbur Wright, 1901 >> >> __ >> 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: A known bad url was replaced by VIPRE >> Please help support this email list: A known bad url was >> replaced by VIPRE >> > > > __ > 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: A known bad url was replaced by VIPRE > Please help support this email list: A known bad url was > replaced by VIPRE > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailm
[Elecraft] OT: Identify Transistor
Help please - in this diagram, the bottom most drawing shows the Source Drain and Gate in a triangle configuration. http://www.nteinc.com/specs/100to199/pdf/nte133.pdf Is the view from top down or looking from below the circle that is the transistor case? tia... __ 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] test
sri, this is test message Atsu, JE1TRV __ 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 as hand luggage
Thank you all for the replies! 73, -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.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] News from Visalia!
Yes, good questions. If a tuner is in the works please have the amp automatically bypassed when a tuning cycle takes place. Rich - N5ZC On 4/19/2010 5:48 PM, David and Dianne on Comcast wrote: > Hi Eric, > > Might you add to our better understanding of the ATU button appearing on > the KPA 500 in some of the jpegs from Visalia? > > Are you planning to offer an outboard companion tuner with the amp or > planning to support one of another vendor such a LDG? > > Thanks in advance for any insight. > > de N1LQ-Dave > __ > 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] News from Visalia!
Hi Eric, Might you add to our better understanding of the ATU button appearing on the KPA 500 in some of the jpegs from Visalia? Are you planning to offer an outboard companion tuner with the amp or planning to support one of another vendor such a LDG? Thanks in advance for any insight. de N1LQ-Dave __ 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] Good photos of KPA500
Nice looking amp! I'm curious about what the display is reading? And yes I also see the ATU button in this photo, which I suppose may or may not be for real... 73, LS W5QD -- View this message in context: http://n2.nabble.com/Good-photos-of-KPA500-tp4926192p4928301.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] time to order your P3, design details?
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] 300w HF amp/kit
Thanks for the informative discourse on the FCC. My intent in my original posting was to merely test the waters - see if the idea had any interest or merit. I am building one of the CCI kits (EB-27A). So this is not a new design approach. I wondered if there might be interest being able to purchase them assembled. One writer suggested just offering to assemble them. Probably the easiest approach. I will not make any decision until I build "my" amp. If it tests good then I may entertain commercial ideas. I am not a multi-millionaire industrialist, just a retired engineer/technician/ham with the interest and ability to build things. I am QRV 500-KHz to 10-GHz. EME on 144, 432, and 1296. I keep an eye toward ham business opportunities and this looked promising. In Free America, it is too bad that a government entity punishes one segment of society for the gov'ts inability to regulate another segment. But I can continue to live on SSA and Medicare living below the poverty level and lobby my congress-person for more handouts instead of doing free-enterprise. My little rant. Of course that is not my attitude, and I will not let this stop me. This probably exhausts this topic so no further replies are required. Loving my new K3! I will post my progress with the CCI kit on: http://www.kl7uw.com/HF.htm signature at bottom of page -- Message: 11 Date: Mon, 19 Apr 2010 10:50:36 -0400 From: "Paul Christensen" Subject: Re: [Elecraft] News from Visalia! To: "Elecraft Reflector" Message-ID: <694ce33d953b4aa0870a05cc45651...@dbtoa000> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original The 15 dB gain limitation made more sense when Part 97.317 included a companion restriction of requiring not less than 50-watts drive power to attain the amp's rated output power. If a Part 95 user had the wherewithal to somehow modify a recently manufactured QRP-input type amp, 15 dB still places a 4W Part 95 transceiver at roughly 140-watts AM, 400W SSB (Part 95.410). Part 97.317(a)(3) already states: "no amplification (0 dB gain) between 26 MHz and 28 MHz." I believe the gain restriction could be dispensed with, and the remaining sections of 97.317 kept intact -- and little detriment would occur. As to HF amp kits requiring certification, I see no dispositive section in the CFR that affirmatively compels certification of a kit for use in Part 97 service. Section 97.315 clearly discusses "manufactured and imported" amplifiers -- kits are not specifically included in the rule. However, there may be relevant case law on the matter that backs up the CFR -- and the FCC may have invoked internal policy decisions in the past, but someone could create an argument that if the FCC had wanted to compel certification of HF amp kits, they could have easily done so and that requirement should have been implemented as a matter of procedure under the APA. The argument can be further bolstered under Part 97.315(a)(1) which states amplifier certification is not required if: "...the amplifier is constructed or modified by an amateur radio operator for use at an amateur station." Does the term "construction" mean home-brew only with parts secured on-hand and through multiple vendors? Or, does construction also mean "in kit form," where the parts are consolidated for sale? The question is then: how does one interpret the exact rule of law? The "in kit form" term could have been easily defined and included in Sections 97.315 and 2.815, but it isn't. If the government intends to prohibit something that's simple to read and interpret, they need to codify it in a rule and not leave it to guess work. Other means to get the FCC's position on the matter can take the form of form of a Declaratory Ruling or Advisory Opinion. Paul, W9AC 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010 DUBUS Magazine USA Rep dubus...@hotmail.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 birdies
Hi Eugeni: You can reduce and sometimes remove birdies just by moving the black shielded cables around inside the radio. Remove the top cover, turn on the power, tune the radio to a birdie, move the cables. I used some tape to hold the longer cables in position once I found a good spot. I personally do not like the software solution that was also suggested. It leaves holes in the audio as you tune across the band. 73, Mike K2MK Eugeni - EA3QP wrote: > > I'm hearing birdies in the following frequencies: > > 28.443 > 21.273,1 > 14.186.6 (the most important one with s3) > 7.068.5 > 3.583,2/3.786.0 > > Also I've done the VCO calibration but the birdies in main and > sub.receiver remains. > > S/N: 38xx. > > Anybody has the same birdies, any advice to fix it?. > > Advanced thanks > > Eugeni - EA3QP > __ > 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-birdies-tp4927074p4927370.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 birdies
I have: 28.443 - (S3) 21.273 - (S4) 7.0685 +/- (S7) 3.580 + (S4) Wes N7WS --- On Mon, 4/19/10, Eugeni - EA3QP wrote: > From: Eugeni - EA3QP > Subject: [Elecraft] K3 birdies > To: elecraft@mailman.qth.net > Date: Monday, April 19, 2010, 12:19 PM > I'm hearing birdies in the following > frequencies: > > 28.443 > 21.273,1 > 14.186.6 (the most important one with s3) > 7.068.5 > 3.583,2/3.786.0 > > Also I've done the VCO calibration but the birdies in main > and > sub.receiver remains. > > S/N: 38xx. > > Anybody has the same birdies, any advice to fix it?. > > Advanced thanks > > Eugeni - EA3QP > __ > 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] News from Visalia!
__ 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] Dayton Contest Dinner
Thanks for the interest, the seat has been spoken for... Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html http://groups.google.com/group/tcg1?hl=en Tennessee QSO Party http://www.tnqp.org/ Elecraft K2 #4455 Elecraft K3/100 #366 Elecraft K3/100 #1875 --- On Mon, 4/19/10, Julius Fazekas n2wn [via Elecraft] wrote: From: Julius Fazekas n2wn [via Elecraft] Subject: Re: Dayton Contest Dinner To: "Julius Fazekas n2wn" Date: Monday, April 19, 2010, 12:26 PM The seat has been spoken for... Thanks!Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3 #1875 View message @ http://n2.nabble.com/Dayton-Contest-Dinner-tp4925097p4926324.html To unsubscribe from Dayton Contest Dinner, click here. - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/Dayton-Contest-Dinner-tp4925097p4927290.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 button problem question
Thanks to Harry, WE1X, for letting me know of a similar button problem he had. It is most likely my problem is not caused by the components I suspected, but rather by the failure of the switch inside the encoder for Speed/Mic. I was thinking only of the rubber-covered buttons, which cannot result in a ground out. However the four encoders containing push switches can fail by putting a ground out to a scan line. There were a few failures on early encoders, and Elecraft now uses encoders from a different source. I sent my front panel board back for repair. 73, Paul K5ESW > Seven of my front panel buttons do not function on K3 #757. I also used the > Switch Test to see that they give no scan codes. All other buttons work OK. > > Looking at the the schematic for the "Front Panel - Switches" I see these > seven > buttons are all connected to the SCANADC0 line into U3. I took off the front > panel and put an ohmmeter from ground to the SCANADC0 line, and it gives a few > ohms. The other lines (SCANADC1-7) show as open. > > I looks like either U3, C30, or R27 is bad. Does anyone see any other > possibilities? > > I don't relish replacing U3 since it is a 16-pin IC. Maybe some Chip-Quik or > tiny cutters to snip the leads would ease the job. > > 73, > Paul > K5ESW __ 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] time to order your P3, design details?
The P3 controls sure don't look simple to me. Then again, this may be the Ten Tec version since it has Orion on it. http://www.shutterpoint.com/Photos-ViewPhoto.cfm?id=668020 W3OU, Steve -Original Message- From: Al Lorona To: elecraft@mailman.qth.net Sent: Mon, Apr 19, 2010 2:26 pm Subject: Re: [Elecraft] time to order your P3, design details? To get you started, look at ... http://www.youtube.com/watch?v=q_Fom1QwNa4&feature=related That is really pretty, but my prevailing thought was that perhaps it's just too uch eye candy-- which really doesn't make interpreting the data any easier. The pectrum readout-- arguably the most important area of the screen-- is difficult o concentrate on with the distraction of the other detail (color, shading, exture, 3D effects, text, labels, buttons, controls) of the skin. I really believe simpler is better. Let me illustrate by example. The last time ou flew on a Boeing 767 this is what the pilots saw on the flight deck: ttp://www.airliners.net/photo/Continental-Airlines/Boeing-767-424-ER/070/&sid=0444c7e1280e36facb8845d82b29142f any of you would perhaps laugh at such a simplistic 1970s display and would ind excuses not to pay money for it in 2010. But this is certainly a ission-critical application where simpler displays mean quick, efficient nterpretation by the pilots in whose hands we place our lives. They gotta be ble to glance and read the situation instantly, without having to twiddle or ead a lot of controls. I know I'm comparing apples and oranges. And I know I'm sounding like an old uy. But the trend in radios-- whether traditional or SDR-- is certainly going owards more and more eye candy. These fancier and fancier GUIs (and front anels) can start to make one dizzy. If it doesn't have at least four blue LEDs nd two or three irregular-shaped pink buttons, people won't buy it, I guess! The display of the P3 shares many characteristics with the 767 display. Without etting into any of the pro-computer/ anti-computer arguments, this is one eason why I like the way the P3 has been laid out. I kinda like simple and uncluttered. If it's good enough for the captain of a 67, it's good enough for me. _ lecraft mailing list ome: http://mailman.qth.net/mailman/listinfo/elecraft elp: http://mailman.qth.net/mmfaq.htm ost: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net lease 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] News from Visalia!
Yup - I read the same section again this morning. My discussions with them have indicated that they now consider 'amplifier', as referred to on their rules, to encompass any amplifier - kit or built. We'll be offering the KPA-500 both ways. (FCC Certified.) 73, Eric WA6HHQ On 4/19/2010 11:00 AM, Paul Christensen wrote: > Eric: > > The term "kit" has indeed been omitted from the rule. I had to take another > look at the rule and track the changes of the CFR. Before mid-2006, Section > 2.815(b) had read: > > "(b) After April 27, 1978, no person shall manufacture, sell or lease, offer > for sale or lease (including advertising for sale or > lease), or import, ship, or distribute for the purpose of selling or leasing > or offering for sale or lease, any external radio frequency > power amplifier or amplifier *kit* capable of operation on any frequency or > frequencies between 24 and 35 MHz." > Then, in 2006, in addition to other changes affecting the rule, the word > "kit" was omitted and as of today, Section 2.815(b) reads:"(b) No person > shall manufacture, sell or lease, offer for sale or lease > including advertising for sale or lease) or import, ship or distribute for > the purpose of selling or leasing or offering for sale or lease, any > external radio frequency power amplifier capable of operation on any > frequency or frequencies below 144 MHz unless the amplifier has received a > grant of certification in accordance with subpart J of this part and other > relevant parts of this chapter..."That said, want to start offering the > KPA500 as a kit?. Paul, W9AC > - Original Message - From: "Eric Swartz - WA6HHQ, Elecraft" > > To: "Paul Christensen" > Cc: "Elecraft Reflector" > Sent: Monday, April 19, 2010 12:44 PM > Subject: Re: [Elecraft] News from Visalia! > > > >> Kits for sale by are specifically -included- in the FCC certification >> requirements. >> >> 73, Eric WA6HHQ >> >> >> >> On 4/19/2010 7:50 AM, Paul Christensen wrote: >> >>> As to HF amp kits requiring certification, I see no dispositive section >>> in >>> the CFR that affirmatively compels certification of a kit for use in Part >>> 97 >>> 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 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] "ea3qp at yahoo.es " -- was "any advice to fix it?"
Sorry about the cut & paste error which resulted in the wrong subject line. -Original Message- From: Gary Hvizdak [mailto:garyhviz...@cfl.rr.com] Sent: Monday 19 April 2010 1434 To: 'ea...@yahoo.es' Cc: 'elecraft@mailman.qth.net' Subject: RE: any advice to fix it? On Mon Apr 19 2010 at 1419 EDT, Eugeni (EA3QP) wrote ... "I'm hearing birdies in the following frequencies ... any advice to fix it?" -- Eugeni, You can use the "SIG RMV [T]" (tech mode) config menu command to remove birdies from just your main receiver. See page 58 in the latest K3 Operator's Manual for full details. 73, Gary KI4GGX K3 #2724 __ 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] any advice to fix it?
On Mon Apr 19 2010 at 1419 EDT, Eugeni (EA3QP) wrote ... "I'm hearing birdies in the following frequencies ... any advice to fix it?" -- Eugeni, You can use the "SIG RMV [T]" (tech mode) config menu command to remove birdies from just your main receiver. See page 58 in the latest K3 Operator's Manual for full details. 73, Gary KI4GGX K3 #2724 __ 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] time to order your P3, design details?
> To get you started, look at ... > http://www.youtube.com/watch?v=q_Fom1QwNa4&feature=related 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. I really believe simpler is better. Let me illustrate by example. The last time you flew on a Boeing 767 this is what the pilots saw on the flight deck: http://www.airliners.net/photo/Continental-Airlines/Boeing-767-424-ER/070/&sid=0444c7e1280e36facb8845d82b29142f Many of you would perhaps laugh at such a simplistic 1970s display and would find excuses not to pay money for it in 2010. But this is certainly a mission-critical application where simpler displays mean quick, efficient interpretation by the pilots in whose hands we place our lives. They gotta be able to glance and read the situation instantly, without having to twiddle or read a lot of controls. I know I'm comparing apples and oranges. And I know I'm sounding like an old guy. But the trend in radios-- whether traditional or SDR-- is certainly going towards more and more eye candy. These fancier and fancier GUIs (and front panels) can start to make one dizzy. If it doesn't have at least four blue LEDs and two or three irregular-shaped pink buttons, people won't buy it, I guess! The display of the P3 shares many characteristics with the 767 display. Without getting into any of the pro-computer/ anti-computer arguments, this is one reason why I like the way the P3 has been laid out. I kinda like simple and uncluttered. If it's good enough for the captain of a 767, it's good enough for 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] K3 birdies
I'm hearing birdies in the following frequencies: 28.443 21.273,1 14.186.6 (the most important one with s3) 7.068.5 3.583,2/3.786.0 Also I've done the VCO calibration but the birdies in main and sub.receiver remains. S/N: 38xx. Anybody has the same birdies, any advice to fix it?. Advanced thanks Eugeni - EA3QP __ 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 and KPA500 Photos
Dick, IF the "Remote Tuner" becomes a reality, I wonder if it will handle Balanced AND Unbalanced feedline? I would be VERY hopeful that it would. For my type of operation it would be "Heaven Sent" Oh well, back to dreaming of the futureand setting aside some more "Pennies" into my E - account..(Grin) 73's Gary On Tue, Apr 20, 2010 at 4:10 AM, Edward Dickinson, III < softb...@windstream.net> wrote: > Ooops...make that ATU, not Tune. > > > > > > A button for TUNE and a Hold for ANT might suggest a post KPA500 Tuner with > Antenna Switching. > > > 73, > Dick - KA5KKT > > > > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Gary VK4FD - Motorhome Mobile http://www.qsl.net/vk4fd/ K3 #679 For everything else there's Mastercard!!! __ 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 and KPA500 Photos
Ooops...make that ATU, not Tune. A button for TUNE and a Hold for ANT might suggest a post KPA500 Tuner with Antenna Switching. 73, Dick - KA5KKT __ 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 and KPA500 Photos
A button for TUNE and a Hold for ANT might suggest a post KPA500 Tuner with Antenna Switching. 73, Dick - KA5KKT Here are a few Visalia 2010 photos of the P3 and KPA500 taken by Bo N7BK: http://pbckt.com/sQ.dJyP 73 and enjoy Tony VE3QF __ 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] KPA500 AMP Frequency Coverage
Band switching - Now that is a great feature. Gary vk4fd On Tue, Apr 20, 2010 at 3:41 AM, wrote: > On Apr 19, 2010, at 8:34 AM, Vic K2VCO wrote: > > Yes, it covers 1.8 - 54 MHz. > > > AND if you press the band button on the KPA500, it will also switch the > band on the K3. > > 73 - Steve WB6RSE > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Gary VK4FD - Motorhome Mobile http://www.qsl.net/vk4fd/ K3 #679 For everything else there's Mastercard!!! __ 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] News from Visalia!
Eric: The term "kit" has indeed been omitted from the rule. I had to take another look at the rule and track the changes of the CFR. Before mid-2006, Section 2.815(b) had read: "(b) After April 27, 1978, no person shall manufacture, sell or lease, offer for sale or lease (including advertising for sale or lease), or import, ship, or distribute for the purpose of selling or leasing or offering for sale or lease, any external radio frequency power amplifier or amplifier *kit* capable of operation on any frequency or frequencies between 24 and 35 MHz." Then, in 2006, in addition to other changes affecting the rule, the word "kit" was omitted and as of today, Section 2.815(b) reads:"(b) No person shall manufacture, sell or lease, offer for sale or lease including advertising for sale or lease) or import, ship or distribute for the purpose of selling or leasing or offering for sale or lease, any external radio frequency power amplifier capable of operation on any frequency or frequencies below 144 MHz unless the amplifier has received a grant of certification in accordance with subpart J of this part and other relevant parts of this chapter..."That said, want to start offering the KPA500 as a kit? . Paul, W9AC - Original Message - From: "Eric Swartz - WA6HHQ, Elecraft" To: "Paul Christensen" Cc: "Elecraft Reflector" Sent: Monday, April 19, 2010 12:44 PM Subject: Re: [Elecraft] News from Visalia! > Kits for sale by are specifically -included- in the FCC certification > requirements. > > 73, Eric WA6HHQ > > > > On 4/19/2010 7:50 AM, Paul Christensen wrote: >> As to HF amp kits requiring certification, I see no dispositive section >> in >> the CFR that affirmatively compels certification of a kit for use in Part >> 97 >> 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] News from Visalia! (:-))
Jim Brown wrote I just returned from Visalia. The exhibit hall included large booths showing Icom and Yaesu rigs. The Elecraft booth was JAMMED from the minute the doors opened until they closed. The Yaesu and Icom booths had only modest traffic, and were oftn next to deserted. Now THAT is interesting..brought on a chuckle Jim. Wonder if Eric noticed 73's Gary On Tue, Apr 20, 2010 at 2:59 AM, Jim Brown wrote: > On Sun, 18 Apr 2010 16:16:58 -0400, Terry Posey wrote: > > >ALS600 with the Linear Power supply, AD5X Full Break In mod and an > >external bandswitching accessory plus an MFJ998 would come in considerably > >under the $2,000 price. > > Do I understand that you are equating MFJ with Elecraft? That's quite a > stretch! While I have great respect for W8JI's engineering, that does not > extend to MFJ's manufacturing, and Ameritron has common ownership with MFJ. > :) > > I can also buy at least twenty different models of 100 watt HF transceiver > for much less than the cost of a K3. Yet I OWN two K3s. > > I just returned from Visalia. The exhibit hall included large booths > showing Icom and Yaesu rigs. The Elecraft booth was JAMMED from the minute > the doors opened until they closed. The Yaesu and Icom booths had only > modest traffic, and were oftn next to deserted. > > 73, > > Jim K9YC > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Gary VK4FD - Motorhome Mobile http://www.qsl.net/vk4fd/ K3 #679 For everything else there's Mastercard!!! __ 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] KPA500 AMP Frequency Coverage
On Apr 19, 2010, at 8:34 AM, Vic K2VCO wrote: Yes, it covers 1.8 - 54 MHz. AND if you press the band button on the KPA500, it will also switch the band on the K3. 73 - Steve WB6RSE __ 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] P3 and KPA500 Photos
Here are a few Visalia 2010 photos of the P3 and KPA500 taken by Bo N7BK: http://pbckt.com/sQ.dJyP 73 and enjoy Tony VE3QF __ 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] Snap-On Ferrites and RF Noise On 160M
Another solution is to take the "zip" cord and pull it apart, chuck two
ends
in a variable speed drill and turn slowly, it will make a very nice
twisted
pair out of any guage. Just be sure to use a length longer than what
you need
as it looses length as it is twisted of course.
To keep it in a tight twist I use small pieces of heat shrink spaced
along the
wires at intervals. I suppose one could use a piece of heat shrink over
the
entire wire if you wanted. YMMV
73 Merv KH7C
> It is not jacketed, but submersible water pump wire is often twisted
> and in sizes as large as one could reasonably wish. Here is one
> example:
>
> http://www.deanbennett.com/submersible-pump-wire.htm
>
> David K0LUM
>
> At 9:37 AM -0700 4/19/10, Jim Brown wrote:
>
>> Another point. It has LONG been known that twisted pair wiring minimizes
>> the radiation and pickup of noise, yet we use parallel wire cable ("zip
>> cord") for power wiring in our ham shacks. That's plain stupid if we care
>> about noise and RF pickup! The problem is finding twisted pair cables of
>> suitable size.
>>
>>
> __
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>
>
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Re: [Elecraft] Good photos of KPA500
Wow. After looking at all those photos I think I'm going to go on a diet. (I can't do a thing about the being old part). Wes N7WS --- On Mon, 4/19/10, Doug Faunt N6TQS +1-510-655-8604 wrote: > From: Doug Faunt N6TQS +1-510-655-8604 > Subject: [Elecraft] Good photos of KPA500 > To: Elecraft@mailman.qth.net > Date: Monday, April 19, 2010, 10:02 AM > Thanks to Bob, N6TV, there are some > good quality photos of the KPA500 > available here and ff. > http://picasaweb.google.com/lh/sredir?uname=rawilson&target=PHOTO&id=5461795475230448002&aid=5461794434122956513&authkey=Gv1sRgCIb8gL7YncDB2gE&feat=email > > 73, doug __ 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] My feelings
Folks - PLEASE, no more postings on this subject. 73, Eric Elecraft List Moderator - really! === __ 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] My feelings [END of Thread]
Don will be back shortly. :-) We all have 'bad hair days' and occasionally hit 'send' too quickly. Folks, As just posted, this thread is now ended. (Mus be the lack of sunspots that has people going a little crazy.. ;-) 73, Eric Elecraft List moderator On 4/19/2010 9:52 AM, Mark - W5EZY wrote: > I sold most of my ham gear, including my K2/100 and KAT100 in EC2 case, 2+ > years ago to take up motorcycling. Now, I've gotten back into ham radio and > purchased another K2/100. Started back reading the Reflector and enjoying > the most-helpful posts of Don Wilhelm. Now, this mess happens; I can't > believe the nit-pickyness and short-sightedness of some people. We have all > lost a good resource help and friend to this forum. Don has helped me in my > first two K2 builds and I have learned a lot from him, just reading his > responses to many others. He'll be greatly missed, all because of a couple > of jerks that just had to make a mountain out of a mole hill; totally > unnecessary. I, too, hope he reconsiders letting these malcontents run him > off. Of course, all this is JMHO. > __ 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] My feelings [Edd of thread]
Guys - Let's end this thread and all related ones now. 73, Eric Elecraft List Moderator (I go out of town for a show and the list goes crazy! ;-) On 4/19/2010 9:37 AM, The Smiths wrote: > > Okay, enough is enough.. This has become SO out of control for no reason! __ 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] My feelings
As if it's your duty to do that NOT I didn't realize your name was ERIC NOT So it wasn't up to you to point anything out !Was it ? IF there is a lesson to be learned here, open your eyes and realize it's you that should be learning. 73 JerryN0JRN On 4/19/2010 11:37:05 AM, The Smiths (notforc...@hotmail.com) wrote: > Okay, enough is enough.. This has become SO out of control for no reason! > > Why do you feel that > it's necessary to send this out to the group No one said that there > was anything wrong with Don or how helpful he his. Don made a simple > mistake of "outing" someone's > call sign and name on the group, as do many other people here. Not > thinking about what > they're doing or what affects it may have on a person that wishes to > remain anonymous. > > No one has said he was a "bad" person. No one has questioned his > helpfulness or dedication to this group! I was simply making mention of > an action so that he, or others on this group wouldn't > consider doing again when someone tries to remain anonymous. Nothing > more.. > There's no reason to come to anyone's defense here people. Enough of > this already! Please. > > > > > > > > > > > > > Date: Mon, 19 Apr 2010 04:18:33 -0700 > > From: ad4c2...@yahoo.com > > To: w1...@arrl.net > > CC: elecraft@mailman.qth.net > > Subject: Re: [Elecraft] My feelings > > > > I will back you up 300% Alan. > > Don is a clear example of a gentleman,he is not only the most trustable > source of __ 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] My feelings
G! This is driving me nuts. Don did NOT "out" someones call!!! The person in question put his callsign in the subject line of the message. Foxjazz did that himself. Don didn't do it. All Don did was look up the call on QRZ.com to associate a name with the call. I WILL continue to come to the defense of someone here when they're accused of doing something they clearly did not do. -- Joe KB8AP On Apr 19, 2010, at 9:37 AM, The Smiths wrote: > Don made a simple mistake of "outing" someone's call sign and name > on the group, as do many other people here. __ 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] Snap-On Ferrites and RF Noise On 160M
It is not jacketed, but submersible water pump wire is often twisted
and in sizes as large as one could reasonably wish. Here is one
example:
http://www.deanbennett.com/submersible-pump-wire.htm
David K0LUM
At 9:37 AM -0700 4/19/10, Jim Brown wrote:
>
>Another point. It has LONG been known that twisted pair wiring minimizes
>the radiation and pickup of noise, yet we use parallel wire cable ("zip
>cord") for power wiring in our ham shacks. That's plain stupid if we care
>about noise and RF pickup! The problem is finding twisted pair cables of
>suitable size.
>
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Re: [Elecraft] News from Visalia! (:-))
On Sun, 18 Apr 2010 16:16:58 -0400, Terry Posey wrote: >ALS600 with the Linear Power supply, AD5X Full Break In mod and an >external bandswitching accessory plus an MFJ998 would come in considerably >under the $2,000 price. Do I understand that you are equating MFJ with Elecraft? That's quite a stretch! While I have great respect for W8JI's engineering, that does not extend to MFJ's manufacturing, and Ameritron has common ownership with MFJ. :) I can also buy at least twenty different models of 100 watt HF transceiver for much less than the cost of a K3. Yet I OWN two K3s. I just returned from Visalia. The exhibit hall included large booths showing Icom and Yaesu rigs. The Elecraft booth was JAMMED from the minute the doors opened until they closed. The Yaesu and Icom booths had only modest traffic, and were oftn next to deserted. 73, Jim K9YC __ 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] My feelings
I sold most of my ham gear, including my K2/100 and KAT100 in EC2 case, 2+ years ago to take up motorcycling. Now, I've gotten back into ham radio and purchased another K2/100. Started back reading the Reflector and enjoying the most-helpful posts of Don Wilhelm. Now, this mess happens; I can't believe the nit-pickyness and short-sightedness of some people. We have all lost a good resource help and friend to this forum. Don has helped me in my first two K2 builds and I have learned a lot from him, just reading his responses to many others. He'll be greatly missed, all because of a couple of jerks that just had to make a mountain out of a mole hill; totally unnecessary. I, too, hope he reconsiders letting these malcontents run him off. Of course, all this is JMHO. -- View this message in context: http://n2.nabble.com/My-feelings-tp4924471p4926478.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] News from Visalia!
Kits for sale by are specifically -included- in the FCC certification requirements. 73, Eric WA6HHQ On 4/19/2010 7:50 AM, Paul Christensen wrote: > As to HF amp kits requiring certification, I see no dispositive section in > the CFR that affirmatively compels certification of a kit for use in Part 97 > 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] Snap-On Ferrites and RF Noise On 160M
On Sun, 18 Apr 2010 19:00:19 -0400, Bill Coleman wrote:
>I found that putting a snap-on ferrite core around the power cord reduced
>the spur to an S5 indication. A similar reduction could be had by placing
>snap-on ferrite around the power output leads.
Study my tutorial on RFI and ferrites.
http://audiosystemsgroup.com/RFI-Ham.pdf
Most snap-on ferrites are designed for maximum effectiveness in the 150 MHz
range. ANY "snap-on" ferrite is next to useless on 160M unless multiple
turns are wound around it. If the wiring in question is radiating the trash
as a common mode signal, you need enough turns around a ferrite core to
place the very low-Q resonance of the ferrite choke near the frequency of
the noise. This takes AT LEAST 10 turns through a relatively large #31
ferrite core.
I've successfully used some moderately horrific cheap switchers in my ham
shack by putting good chokes on both input and output cables, and by adding
RF capacitors across both the AC line and the DC line. You can also
suppress differential noise from SMALL levels of DC current with a choke on
only one conductor. High levels of DC current will saturate a choke on only
one conductor, but most of us don't worry a lot about RX noise when we're
transmitting. :)
Another point. It has LONG been known that twisted pair wiring minimizes
the radiation and pickup of noise, yet we use parallel wire cable ("zip
cord") for power wiring in our ham shacks. That's plain stupid if we care
about noise and RF pickup! The problem is finding twisted pair cables of
suitable size.
73,
Jim K9YC
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Re: [Elecraft] My feelings
Okay, enough is enough.. This has become SO out of control for no reason! Why do you feel that it's necessary to send this out to the group No one said that there was anything wrong with Don or how helpful he his. Don made a simple mistake of "outing" someone's call sign and name on the group, as do many other people here. Not thinking about what they're doing or what affects it may have on a person that wishes to remain anonymous. No one has said he was a "bad" person. No one has questioned his helpfulness or dedication to this group! I was simply making mention of an action so that he, or others on this group wouldn't consider doing again when someone tries to remain anonymous. Nothing more.. There's no reason to come to anyone's defense here people. Enough of this already! Please. > Date: Mon, 19 Apr 2010 04:18:33 -0700 > From: ad4c2...@yahoo.com > To: w1...@arrl.net > CC: elecraft@mailman.qth.net > Subject: Re: [Elecraft] My feelings > > I will back you up 300% Alan. > Don is a clear example of a gentleman,he is not only the most trustable > source of information on Elecraft radios but also a decent business man,I had > the chance once in the past to let him tune my K2 and he did a great job in a > short time and with a decent affordable service fees. > He also has my home doors for lunch or dinner opened at any time. > > Hector > AD4C > > > > "For a refined ham it is compulsory to own a k3" > > --- On Mon, 4/19/10, Alan Price wrote: > > > From: Alan Price > Subject: [Elecraft] My feelings > To: "Elecraft" > Date: Monday, April 19, 2010, 10:28 AM > > > > Fellow Elecrafters: > > > > Normally I don't enter into conversations like this one. In this case I feel > obligated. > > > > I have known Don, through the reflector for many years. He is probably the > largest source of Elecraft knowledge on the reflector. He is also a > gentleman. In the many years I have corresponded with him, he has be > courteous, honest and more than helpful. He is welcome in my home here in > California for dinner on a moments notice. I have nothing but respect for > him. > > > > 73 > > Alan > > W1HYV > > _ > The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with > Hotmail. > http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5 > __ > 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 _ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_3 __ 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] KPA500
I don't understand the "too quiet" comment, if it's intended to be serious. As for the "unwanted modulations", that's probably why they've chosen a toroidal power transformer. 73 -- Joe KB8AP On Apr 19, 2010, at 9:05 AM, Jerry T. Dowell wrote: > And too quiet! > > It would not be advisable to operate a linear supply in close > proximity to > the K3 or the K2. The resulting unwanted modulations have been > discussed > previously. > > Jerry AI6L > > -Original Message- > From: Bob McGraw - K4TAX [mailto:rmcg...@blomand.net] > Sent: Sunday, April 18, 2010 3:02 PM > To: Doug Faunt N6TQS +1-510-655-8604 > Cc: elecraft@mailman.qth.net; m0...@alphadene.co.uk; d...@w3fpr.com > Subject: Re: [Elecraft] KPA500 > > I'll pass on linear supplies. Too heavy, too inefficient. > > 73 > Bob, K4TAX __ 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] Dayton Contest Dinner
The seat has been spoken for... Thanks! - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/Dayton-Contest-Dinner-tp4925097p4926324.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500
On 4/19/2010 9:05 AM, Jerry T. Dowell wrote: > And too quiet! > > It would not be advisable to operate a linear supply in close proximity to > the K3 or the K2. The resulting unwanted modulations have been discussed > previously. Obviously I haven't tried it (!) but I suspect that the external magnetic field from a toroidal transformer is much less extensive than that of the usual laminated type. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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] Power Outlets for Ham Shacks
On Sun, 18 Apr 2010 19:00:26 -0400, Bill Coleman wrote: >There are hair dryers that draw more current than this. At 1500 watt draw is >not unreasonable from a 120v outlet. Yes and no. The current drawn by power supplies is NOT sinusoidal, it is a series of pulses at the positive and negative peaks of the 60 Hz sine wave to recharge the input filter capacitor. This causes the voltage drop in the wiring between the breaker panel and the outlet to be greater than would be predicted by Ohm's Law for a sine wave. This is true regardless of whether the power supply is a linear supply or a switching supply. In today's world, it makes good sense to over-size the conductors that feed ANY outlet, especially one that is likely to be heavily loaded. NEC (US electrical code) requires AT LEAST AWG #14 for a 15A outlet and #12 for a 20A outlet (and larger if the run to the outlet is long). Most of the cost of installing an outlet is labor. If you're going to add an outlet to your ham shack, I'd run #10 conductors (to reduce the voltage drop) and install a 20A breaker. Another point. Common neutrals should be avoided. That is, it is always best to run individual phase (hot) and neutral conductors to each outlet. You can read more about pulsed currents and the problems they cause in the Power and Grounding White Paper that's on my website. http://audiosystemsgroup.com/publish.htm 73, Jim Brown K9YC __ 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] KPA500
And too quiet! It would not be advisable to operate a linear supply in close proximity to the K3 or the K2. The resulting unwanted modulations have been discussed previously. Jerry AI6L -Original Message- From: Bob McGraw - K4TAX [mailto:rmcg...@blomand.net] Sent: Sunday, April 18, 2010 3:02 PM To: Doug Faunt N6TQS +1-510-655-8604 Cc: elecraft@mailman.qth.net; m0...@alphadene.co.uk; d...@w3fpr.com Subject: Re: [Elecraft] KPA500 I'll pass on linear supplies. Too heavy, too inefficient. 73 Bob, K4TAX - Original Message - From: "Doug Faunt N6TQS +1-510-655-8604" To: Cc: ; ; Sent: Sunday, April 18, 2010 4:56 PM Subject: Re: [Elecraft] KPA500 > It's not a switcher. As is common for linear power supplies (and not > uncommon for switchers), there's an input voltage selector as part of > the input power connector/fuse/switch combo. > > Since the power transformer is 15 of the 22 pounds weight, one of my > thoughts was to ship that part (or an extra) ahead when traveling, and > when I asked was told that currently it takes about 15 minutes to > install, but that time might be cut. > > 73, doug > > From: "Bob McGraw - K4TAX" > Date: Sun, 18 Apr 2010 16:24:43 -0500 > > Any switching supply today and one that's "worth it's salt" should > operate > satisfactorily from 100 VAC to 250 VAC. So 120 VAC or 230VAC should > not be > of conern. > > 73 > Bob, K4TAX > > > - Original Message - > From: "Don Wilhelm" > To: "David Ferrington, M0XDF" > Cc: > Sent: Friday, April 16, 2010 3:40 PM > Subject: Re: [Elecraft] KPA500 > > > David, > > > > Because not all have hamshacks that are wired for 220 volts. If the > > space was not wired specifically for hamshack use, there is likely to > be > > only 120 volt receptacles available. Up to 1000 watts draw (500 > watts > > with 50% efficiency) on a normal 120 volt 15 amp circuit is practical, > > but attempting to run more than becomes marginal. > > > > 73, > > Don W3FPR > > > > David Ferrington, M0XDF wrote: > >> I'm intrigued, obviously we'd look for 220v over here, but why not > 120v > >> in US? > >> 73 de M0XDF, K3 #174 > __ 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] Good photos of KPA500
Thanks to Bob, N6TV, there are some good quality photos of the KPA500 available here and ff. http://picasaweb.google.com/lh/sredir?uname=rawilson&target=PHOTO&id=5461795475230448002&aid=5461794434122956513&authkey=Gv1sRgCIb8gL7YncDB2gE&feat=email 73, doug __ 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] SCAF-1
Hi Don from Mike WB9GZL (K2 #4206). I don't always have the time to read the Elecraft email reflector each day, and I just stumbled across your week-old-or-so post looking to sell your SCAF-1. I would be interested if you still have it. Thanks Don, and thanks too for your contributions to the reflector. 73, Mike __ 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 as hand luggage
My experience with the K3 as hand luggage has been good. I have been taking my K3 to and from Aruba for 2 1/2 years. At SFO, about half the time I have to take it out of the backpack for it to be checked. They then swab it briefly for explosives and usually run it through the x-ray machine again. This has never been a problem, other than causing a slight delay. On Aruba, it's just gone through both their local search and the separate TSA search without causing any comment. I never take it out of the backpack to put in a separate bin. 73, andy, ae6y __ 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] KPA500 AMP Frequency Coverage
On 4/19/2010 7:46 AM, w3...@aol.com wrote: > Hello all: > > Perhaps I missed it in earlier discussions but can anyone tell me > what bands the KPA500 will cover? I assume 160 is the low end but will it > cover 6 meters as well? Thanks. Chris Patterson W3CMP Yes, it covers 1.8 - 54 MHz. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ 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 as hand luggage
I believe that TSA requires laptops, digital movie cameras, and "other large electronics items" to be removed from their carrying cases and placed in a separate bin to go through xray. practices vary a little from airport to airport, but it certainly does not hurt to at least inform TSA what's in your hand luggage and ask them if it should be removed. No matter what, you can count on having the bag and radio take aside to be wiped down and tested for explosives. that has happened to me every time I have carried any ham radio through security, even a little 2-meter mobile unit. if you check the radio, inform TSA what's in the bag when you hand it over to them. This is not required but reduces hassles. if you have any problems with an inspector, ask them to call a supervisor. lew k6lmp On Apr 19, 2010, at 5:42 AM, N2TK, Tony wrote: > I have a wheeled carrier for my K3 and laptop. Take both out for the x-ray > machine. No problems to date. > Tony > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Felipe Ceglia - PY1NB > Sent: Monday, April 19, 2010 8:25 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] K3 as hand luggage > > Hi, > > Is it ok to have a K3 inside hand luggage on US flights? Or can one have > problems with TSA? > > 73 TU, > > Felipe - PY1NB > > -- > Felipe Ceglia - PY1NB > > - > PR1T team member /// Rio DX Group member /// Araucaria DX Group member > http://www.dxwatch.com /// http://reversebeacon.net /// > http://riodxgroup.dxwatch.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA500 AMP Frequency Coverage
Hello all: Perhaps I missed it in earlier discussions but can anyone tell me what bands the KPA500 will cover? I assume 160 is the low end but will it cover 6 meters as well? Thanks. Chris Patterson W3CMP __ 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] News from Visalia!
The 15 dB gain limitation made more sense when Part 97.317 included a companion restriction of requiring not less than 50-watts drive power to attain the amp's rated output power. If a Part 95 user had the wherewithal to somehow modify a recently manufactured QRP-input type amp, 15 dB still places a 4W Part 95 transceiver at roughly 140-watts AM, 400W SSB (Part 95.410). Part 97.317(a)(3) already states: "no amplification (0 dB gain) between 26 MHz and 28 MHz." I believe the gain restriction could be dispensed with, and the remaining sections of 97.317 kept intact -- and little detriment would occur. As to HF amp kits requiring certification, I see no dispositive section in the CFR that affirmatively compels certification of a kit for use in Part 97 service. Section 97.315 clearly discusses "manufactured and imported" amplifiers -- kits are not specifically included in the rule. However, there may be relevant case law on the matter that backs up the CFR -- and the FCC may have invoked internal policy decisions in the past, but someone could create an argument that if the FCC had wanted to compel certification of HF amp kits, they could have easily done so and that requirement should have been implemented as a matter of procedure under the APA. The argument can be further bolstered under Part 97.315(a)(1) which states amplifier certification is not required if: "...the amplifier is constructed or modified by an amateur radio operator for use at an amateur station." Does the term "construction" mean home-brew only with parts secured on-hand and through multiple vendors? Or, does construction also mean "in kit form," where the parts are consolidated for sale? The question is then: how does one interpret the exact rule of law? The "in kit form" term could have been easily defined and included in Sections 97.315 and 2.815, but it isn't. If the government intends to prohibit something that's simple to read and interpret, they need to codify it in a rule and not leave it to guess work. Other means to get the FCC's position on the matter can take the form of form of a Declaratory Ruling or Advisory Opinion. Paul, W9AC - Original Message - From: "Jim Miller" To: "Elecraft Reflector" Sent: Monday, April 19, 2010 9:52 AM Subject: Re: [Elecraft] News from Visalia! > Is there some obvious reason why the FCC chose 15dB as the gain limit? > > 73 > > jim ab3cv > __ > 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] OT: Don / Unidentified list posters
Ken Kopp wrote: "I've 'stewed' about the issue most of the night." Me too, Ken. Don helped me a lot when I was assembling my KX1 and K2. The impatient K2 builder says he doesn't care at all about feelings; yet he also claims to have an EET degree. I taught for many years in a community college EET program. I fought many battles over curriculum issues in order to help ensure that students received more than just a technical education, and that we conferred degrees upon well rounded individuals. This reflector, when all is said and done, is more about feelings than anything else. 73, Chuck NI0C __ 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] OT: Need Help with Transistor Substitution ;-)
2SC372Y and 2SK19GR OR NTE85 and NTE133 (same pair cross referenced to NTE Into a common part that I could get at RF Parts? These are old FT101 FET's and they might be common under some newer name. Thanks, Don __ 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] K1 LED backlight anode annotation
Don, You are indeed correct...thanks for enlightening me! -- View this message in context: http://n2.nabble.com/K1-LED-backlight-anode-annotation-tp4917968p4925395.html Sent from the [K1] 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] News from Visalia!
Jim - I believe it was to make CB amps illegal and unprofitable. Also, Ham amps were not permitted to operate on 10 meters for the same reason - to make them unattractive to CB operators. Monty K2DLJ > Is there some obvious reason why the FCC chose 15dB as the gain limit? > > 73 > > jim ab3cv __ 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] News from Visalia!
While I don't have any desire for a KPA500, I am EXTREMELY happy that it is in the pipeline because I can continue holding out hope that Elecraft's R&D continues on a KPA1500...which is the one I can't wait to buy. My pair of Alpha 76CAs are getting long in the tooth and if the KPA500 sells like hotcakes it will generate enough cash flow to fund completion of the KPA1500 project (I hope). Bob K5WA __ 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] News from Visalia!
Is there some obvious reason why the FCC chose 15dB as the gain limit? 73 jim ab3cv __ 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] News from Visalia!
I am building up such a linear amp 12w --> 200w on 2-30 MHz. If it tests out well, I am thinking their may be a market for this. I understand that the FCC has to accept the unit, but I wonder if it is only available as a kit if that applies? This is a 28-volt transistor so a 28 volt 20A supply is needed>>> Kits and parts kits, even when incomplete, have to be certified. For some reason the FCC has allowed the CCI kits to slip by but even at Heathkit, once type acceptance came into play, things had to go past the FCC. It's a big deal to do a certification filing. Just follow the rules outlined by the FCC. Gain limit is 15 dB, there are harmonic and spurious specs, and no amplification or easy modification for operation between 26-28 MHz. __ 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] OT: Don / Unidentified list posters
What a sad and angering situation to find when Rose and I checked into a motel on the way home from Visalia and logged on for our e-mail. I've "stewed" about the issue most of the night. A post from Don, regardless of subject, was a -must- read. There's almost always "learning" to be gleaned and I'm envious of his knowledge. There are several list posters who hide their identity unless one goes to the message header, but I've never read them. They're deleted. Don appears to have addressed the issue, as I've wanted to do, but never have. This seems to be the proverbial case of "biting the hand that feeds", and now the food source is gone. We're -all- the worse for it. 73! Ken Kopp - K0PP __ 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] Dayton Contest Dinner
We have one seat left open at our table, so far we have: W5MX and wife, WB8JUI, AB4GG, W4KRY, WF7T, UA3AGW, NP3D and N2WN... This happens Saturday night. If anyone would like to join us, please contact me off list. Hope to see a bunch of fellow Elecrafter's there, and think we'll be adding one too! 73, Julius n2wn - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/Dayton-Contest-Dinner-tp4925097p4925097.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] P3
So did anyone get any video or more info on the P3 over the weekend? Tnx es 73, LS W5QD -- View this message in context: http://n2.nabble.com/P3-tp4914382p4924961.html Sent from the [K3] 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 as hand luggage
I have a wheeled carrier for my K3 and laptop. Take both out for the x-ray machine. No problems to date. Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Felipe Ceglia - PY1NB Sent: Monday, April 19, 2010 8:25 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 as hand luggage Hi, Is it ok to have a K3 inside hand luggage on US flights? Or can one have problems with TSA? 73 TU, Felipe - PY1NB -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.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 as hand luggage
Hi, Is it ok to have a K3 inside hand luggage on US flights? Or can one have problems with TSA? 73 TU, Felipe - PY1NB -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.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] Grounding negative side of power supply?
I did a calculation of how many feet of heavy gauge wire would be required to do this grounding. Glad it isn't necessary. For some stations one would be talking thousands of feet of wire to tie all the RX antenna grounds to the mains ground. One wants to keep the RX antennas well away from TX antennas The cost of the wire would greatly exceed the cost of the equipment one is trying to protect.. It seems highly unlikely such lengths would keep all grounds at equal potential for a nearby lightning strike transient anyhow. 73 de Brian/K3KO Tom W8JI wrote: >This appears to be a question from January 20, 2010, so it >is a little late, but a person never wants to connect the >ground rod of the K9AY antenna or any other small or low >receiving antenna to the mains ground. > >First, it would kill the advantage of having the antenna. If >you are going to do that, don't bother installing the >antenna. It will hurt the antenna in more than one way. > >Second, it is not necessary for safety. It is not a large >tall structure and is not likely at all to be involved with >a direct lightning hit, and even if it were hit the ground >at the cable entrance to the house would provide all the >required protection. > >The shack ground and the antenna entrance ground should be >bonded to the mains, but the K9AY or any other low noise >receiving array must have an isolated ground. The cable >leaving the receiving antenna should be buried, should have >common mode isolation, and should be grounded at the house >entrance to a ground that is bonded to the mains ground. > >73 Tom > > >- Original Message - >From: "Robert Mcgraw" >To: "Bill Coleman" >Cc: ; >Sent: Sunday, April 18, 2010 10:35 PM >Subject: Re: [Elecraft] Grounding negative side of power >supply? > > >Yes, do provide a driven ground for the K9AY receiving >antenna. This is >required for lightning protection. AND be sure to bond this >ground to >the AC mains ground for the house. Failure to do this will >produce a >voltage difference or step voltage between the two ground >during a nearby >lightning strike. The voltage difference can be enough to >damage or >destroy the radio connected between the antenna and the AC >power. AND, >bonding of all grounds to a common point is a requirement of >the NEC. > >Remember, lighting has traveled through several thousand >feet of air. A >balun will offer little to no protection in this regard. >Now placing a >choke balun or a 1:1 current balun at the feed point will >reduce common >mode noise on the coax feed line. > >73 >Bob, K4TAX > > > > > >>On Jan 20, 2010, at 11:47 PM, Richard S. Lindzen wrote: >> >> >> >>>Dear Don, >>> >>>This leaves me a bit concerned. I am planning to put up >>>a K9AY >>>receiving antenna in my backyard and it is supposed to be >>>connected >>>to a ground rod. I had never seen it suggested that this >>>must be >>>connected to the utility ground stake. I'm not even sure >>>where the >>>utility ground stake is. I've never noticed one though I >>>will ask my >>>electrician. If there is one, it is likely to be pretty >>>far from the >>>K9AY. >>> >>> >>For the K9AY, your best bet is to make sure the antenna >>ground and the >>coax ground are completely isolated. I do this by >>magnetically coupling >>the coax with a 9:1 transformer. Otherwise, common-mode >>noise can move >>out the shield and be picked up by the antenna. >> >>Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net >>Web: http://boringhamradiopart.blogspot.com >>Quote: "Not within a thousand years will man ever fly!" >>-- Wilbur Wright, 1901 >> >>__ >>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: A known bad url was replaced by VIPRE >>Please help support this email list: A known bad url was >>replaced by VIPRE >> >> >> > > >__ >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: A known bad url was replaced by VIPRE >Please help support this email list: A known bad url was >replaced by VIPRE > >__ >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 > > > > >No virus found in this incoming message. >Checked by AVG - www.avg.com >Version: 9.0.801 / Virus Database: 271.1.1/2819 - Release Date: 04/18/10 >14:31:00 > > > _
[Elecraft] K1-Something interesting about the inventory
Ok, I can finally get to the site to comment...I did my inventory on the K1 when it arrived, but missed the filter board. Elecraft promptly sent me a new one (yea) While waiting, I built part of the front panel but got to the point in the build (lcd backlight) where I need to hook up to the filter board, so I have to stop. When I get the filter board, I go to start and notice that I never received the filter bag. Now, I would have inventoried the filter bag, but I have no inventory for the filter bag in my manual in Appendix A. AArrrgghh, what am I missing...do they assemble the manuals when they gather all the supplies and just left out the filter bag inventory? Anyways, I hope to get the filter bag and inventory sheet soon this week. I feel like an idiot with all of this nonsense. Thanks Greg ki4bbl -- View this message in context: http://n2.nabble.com/K1-Something-interesting-about-the-inventory-tp4924771p4924771.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] My feelings
I will back you up 300% Alan. Don is a clear example of a gentleman,he is not only the most trustable source of information on Elecraft radios but also a decent business man,I had the chance once in the past to let him tune my K2 and he did a great job in a short time and with a decent affordable service fees. He also has my home doors for lunch or dinner opened at any time. Hector AD4C "For a refined ham it is compulsory to own a k3" --- On Mon, 4/19/10, Alan Price wrote: From: Alan Price Subject: [Elecraft] My feelings To: "Elecraft" Date: Monday, April 19, 2010, 10:28 AM Fellow Elecrafters: Normally I don't enter into conversations like this one. In this case I feel obligated. I have known Don, through the reflector for many years. He is probably the largest source of Elecraft knowledge on the reflector. He is also a gentleman. In the many years I have corresponded with him, he has be courteous, honest and more than helpful. He is welcome in my home here in California for dinner on a moments notice. I have nothing but respect for him. 73 Alan W1HYV _ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5 __ 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] KPA500
Switching supply can do much better than 50% efficiency, I've designed several for use in PA's that are close to 95% efficient. The dominating inefficiency is usually in the PA Matt W8ESE __ 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] My feelings
Fellow Elecrafters: Normally I don't enter into conversations like this one. In this case I feel obligated. I have known Don, through the reflector for many years. He is probably the largest source of Elecraft knowledge on the reflector. He is also a gentleman. In the many years I have corresponded with him, he has be courteous, honest and more than helpful. He is welcome in my home here in California for dinner on a moments notice. I have nothing but respect for him. 73 Alan W1HYV _ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5 __ 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
