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New Smith Chart Program - "SmartSmith"
SmartSmith for Windows is a Smith Chart program designed to provide a
convenient tool for designing transmission line matching sections. It can also design matching sections for any electrical circuit in which it is important to be able to visualize the progress being made while configuring a particular matching section circuit element. The program provides for data entry in the form of a complex impedance in "a + jb" (Cartesian) form that is to be matched to a purely resistive characteristic impedance as would typically be encountered in transmission lines. The primary limitation of such an approach for anything other than transmission lines is that the characteristic impedance of the line to which we desire a match is assumed to be purely resistive (no imaginary component). SmartSmith for Windows provides the user with a suite of nine different impedance transforming elements that can be used in the program to implement an impedance match. These nine individually configurable elements a • Series Resistance (ohms) • Shunt Conductance (milli-mhos) • Series Capacitance (ohms of reactance and pF) • Shunt Capacitive Susceptance (milli-Siemens ) • Series Inductance (ohms of reactance and uH) • Shunt Inductive Susceptance (milli-Siemens) • Open Stub (0 – 90 degrees, any Zo) • Shorted Stub (90 – 0 degrees, any Zo) • Series Trans. Line (-180 to 0 to +180 degrees, any Zo) SmartSmith has many advantages over the paper Smith Chart. Plotting impedance points on a Smith Chart can be very tedious. Each time a new value of a design element is to be evaluated, the designer must generate a new value of reactance in ohms for that element and must then calculate a new value for the net impedance seen looking into the circuit with this new value of matching section in place. The designer then takes those new values of the real and imaginary parts, normalizes those values and locates the correct coordinates on the Smith Chart and draws a new point on the chart. With SmartSmith that process is reduced to clicking the mouse on the spin control to change the value of that design element and see the new point being plotted instantaneously. SmartSmith also continuously shows the complex values of normalized admittance and impedance as the points are plotted. In order to progress through the design steps, as a design element is completed, the designer presses the “Keep and Continue” button in order to take the latest value of impedance and save that as the new Load impedance, leaving the plotted points on the Smith Chart. He then picks the next matching section type and begins configuring that element to continue the design, as necessary. At any point, the designer can use the “Discard and Start Over” button to reset the system to the last “Keep and Continue” values and select a different type matching section. The most important feature of SmartSmith is its Wizard. Having entered the Load impedance into the program, the inexperienced designer may not have any idea where to begin. By pressing the “What Would the Wizard Advise” button, the user is taken through a set of simple steps to transform that impedance to 1 + j0, normalized, and those steps have been automatically chosen based on the region of the Smith Chart in which the Load impedance is located. Download your free copy of SmartSmith version 1.1 using the following link (slightly larger than 2 MB): http://www.qsl.net/w9dmk/SWDownloads/SmartSmith11.zip Or, visit my Web site and peruse all of the free software at: http://www.qsl.net/w9dmk Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk |
Can't download the file Bob, wonder if anyone else has had a problem. Tried 5
times. 73 Gary N4AST |
On 29 Oct 2004 23:20:25 GMT, (JGBOYLES) wrote:
Can't download the file Bob, wonder if anyone else has had a problem. Tried 5 times. 73 Gary N4AST Dear Gary, I have only had one person send me a message about the program and he said nothing about any problem in downloading. Could you tell me whether you are clicking on the link while at my Web page or are you using the link that I put in my posting to rraa? If you are not successful, send me a message at , and I will send it to you as an attachment. Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk |
In article , Robert Lay W9DMK wrote:
On 29 Oct 2004 23:20:25 GMT, (JGBOYLES) wrote: Can't download the file Bob, wonder if anyone else has had a problem. Tried 5 times. 73 Gary N4AST Dear Gary, I have only had one person send me a message about the program and he said nothing about any problem in downloading. Could you tell me whether you are clicking on the link while at my Web page or are you using the link that I put in my posting to rraa? If you are not successful, send me a message at , and I will send it to you as an attachment. Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk qsl.net is notoriously slow. Anybody with a fat pipe (I got T1 at work) can see this. I tried today and got nowhere, both with the link in the post and on the website. Too bad, these look like great programs. I would be willing to PAY for them on a cd. |
On Sat, 30 Oct 2004 01:15:58 -0000, Barnacle Bill
wrote: qsl.net is notoriously slow. Anybody with a fat pipe (I got T1 at work) can see this. I tried today and got nowhere, both with the link in the post and on the website. Too bad, these look like great programs. I would be willing to PAY for them on a cd. Dear Bill, Slow is relative. For someone like me with a V.90 modem, everything seems slow. I get the same download speeds from QSL as from anywhere else - about 4 kBytes/sec. Getting the software on is easier than you might think. I will try to honor such requests for what is essentially my costs, so long as the volume of requests isn't too high. Anyone who sends me a Self Addressed 6" x 9" clasp type manila envelope with a dollar bill in it gets a CD by return mail. R. Lay 15517 Delaware Dr. King George, VA 22485 Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk |
I successfully (I think) downloaded the file about a day ago, but the
speed was extremely slow. It was about the speed of a dialup connection, although I have a T1 speed line. Roy Lewallen, W7EL Barnacle Bill wrote: qsl.net is notoriously slow. Anybody with a fat pipe (I got T1 at work) can see this. I tried today and got nowhere, both with the link in the post and on the website. Too bad, these look like great programs. I would be willing to PAY for them on a cd. |
Hi Bob -
Thank you very much for making these available! I just downloaded SmartSmith from your qsl.net links, and I'm looking forward to trying it. BTW, qsl.net WAS spectacularly slow, averaging 0.5 kB/s. It's a good thing this was "only" 2MB. 73, Ed, W6LOL |
On Sat, 30 Oct 2004 23:52:24 -0000, Barnacle Bill
wrote: Some of us have gotten spoiled rotten by our wideband connections. I for one have a T1 at work and do most of my downloading there. Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! Dear BB, Amen! My first experience with "dial-up" was in 1965. I was asked to try out a program in Basic that designed electric motors. You had to dial up this big main frame in Boston - Dartmouth, I think. We had a teletype as a terminal and an acoustic modem at 300 baud. The acoustic modem was a telephone handset with sponge cups for earpiece and mouthpiece that snugged around the telephone handset. Acoustic coupling means no electric connection - good for lightning isolation - Hi! You typed in your Basic program and tried it out. If you wanted to pay a monthly fee for storage you could save your typed in program on their disk for a monthly fee. Talk about a text based interface - primitive doesn't even begin to describe it. I am tickled to have V.90 at somewhere above 33 kBaud. It makes your head swim to think about where it will be 5 years from now. Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk |
Barnacle Bill wrote:
Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! I remember saving up for a 300 baud modem. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
On Sat, 30 Oct 2004 23:52:24 -0000, Barnacle Bill
wrote: Some of us have gotten spoiled rotten by our wideband connections. I for one have a T1 at work and do most of my downloading there. Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! ;^) BB I still have my little Radio Shack Model 100 portable pc, with its mighty 300-baud modem. Them was the times... bob k5qwg |
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On Sun, 31 Oct 2004 02:40:26 GMT, (Robert Lay W9DMK) wrote:
Dear BB, Amen! My first experience with "dial-up" was in 1965. I was asked to try out a program in Basic that designed electric motors. You had to dial up this big main frame in Boston - Dartmouth, I think. We had a teletype as a terminal and an acoustic modem at 300 baud. The acoustic modem was a telephone handset with sponge cups for earpiece and mouthpiece that snugged around the telephone handset. Acoustic coupling means no electric connection - good for lightning isolation - Hi! You typed in your Basic program and tried it out. If you wanted to pay a monthly fee for storage you could save your typed in program on their disk for a monthly fee. Talk about a text based interface - primitive doesn't even begin to describe it. I am tickled to have V.90 at somewhere above 33 kBaud. It makes your head swim to think about where it will be 5 years from now. Bob, W9DMK, Dahlgren, VA http://www.qsl.net/w9dmk Hi Bob, thanks for the new Smith program. I did have a problem downloading it, and still don't know if it's all there. We're returning to Florida early tomorrow morning, and once I get the external drive connected down there I'll determine if your program is in working order. If not, I'll email you for a new download. So far, it looks like a real winner! Walt |
Smith Charts went out of date wth slide rules and log tables with the advent
of the pocket calculator. Be real engineers. Get yourselves into the 21st century. ---- Reg |
"JGBOYLES" wrote in message ... Smith Charts went out of date wth slide rules and log tables with the advent of the pocket calculator. Be real engineers. Get yourselves into the 21st century. Hi Reg, Since this is an Amateur Radio Newsgroup, why do you think we should all be real engineers? Do you write all of your excellent programs for the sole benefit of the real engineers? I have used your programs, Smith Chart Programs, and a number of others that I have found to sucessfully design antennas and matching networks. If I had to choose between your programs and the Smith Chart, I would have to say I like both. 73 Gary N4AST You're much too tactful, Gary. Are you a politician? John |
In article , Bob Miller wrote:
On Sat, 30 Oct 2004 23:52:24 -0000, Barnacle Bill wrote: Some of us have gotten spoiled rotten by our wideband connections. I for one have a T1 at work and do most of my downloading there. Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! ;^) BB I still have my little Radio Shack Model 100 portable pc, with its mighty 300-baud modem. Them was the times... bob k5qwg Hey, I still have mine too! In fact, I just dug it out of a 'mystery box' in the attic. It still works. Back in the 80's, I used in my land survey business; I wrote a COGO program in BASIC on it that worked like a charm... BB |
On Mon, 01 Nov 2004 04:54:54 -0000, Barnacle Bill
wrote: In article , Bob Miller wrote: On Sat, 30 Oct 2004 23:52:24 -0000, Barnacle Bill wrote: Some of us have gotten spoiled rotten by our wideband connections. I for one have a T1 at work and do most of my downloading there. Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! ;^) BB I still have my little Radio Shack Model 100 portable pc, with its mighty 300-baud modem. Them was the times... bob k5qwg Hey, I still have mine too! In fact, I just dug it out of a 'mystery box' in the attic. It still works. Back in the 80's, I used in my land survey business; I wrote a COGO program in BASIC on it that worked like a charm... BB There's actually a user group for the little booger -- see http://www.club100.org/ bob k5qwg |
Reg Edwards wrote:
Smith Charts went out of date wth slide rules and log tables with the advent of the pocket calculator. An abstract math equation will get one the answer but not necessarily illustrate what is happening in reality. We see the results of that here on this newsgroup. The appeal of the Smith Chart is that it gives one a graphic conceptual grasp of reality while using those same equations to solve the problem. A picture *is* worth a thousand words. We can see the (Vfor+Vref)/(Ifor/Iref) impedance displayed right there on the SWR circle. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
"Robert Lay W9DMK" wrote in message ... Download your free copy of SmartSmith version 1.1 using the following link (slightly larger than 2 MB): Hi Bob, What a dissapointment - spending so much time in downloading your progam (three attempts), only to have it fail in its installation. Your installer told me I have an outdated file it needs to replace. Afer allowing - and rebooting - the installer did not continue. When attempting another install, I get the same response... ad infinitum. Chuck, WA7RAI |
I can't deny its small educational value. There are other things besides
transmissions lines. Its worth a single lecture in a 3 year course as are numerous other graphical methods of illustrating electrical principles.. But unless one is made aware of its limitations and its inaccuracies (which takes up half the lecture) it can in fact damage an education and turn a student into an old-wife. But it's fine for old-timers who've had years of practice and can use it with their eyes shut as they already know the answer before they start. It is a paper instrument which assists in performing very simple algebraic calculations - provided you already know what its all about. I appreciate its historical, nostalgic, sentimental value. If you gaze at it long enough it acquires a certain beauty. And it served a very uselul, time-saving purpose when in vogue during the 1940's. ---- Reg "Cecil Moore" wrote in message ... Reg Edwards wrote: Smith Charts went out of date wth slide rules and log tables with the advent of the pocket calculator. An abstract math equation will get one the answer but not necessarily illustrate what is happening in reality. We see the results of that here on this newsgroup. The appeal of the Smith Chart is that it gives one a graphic conceptual grasp of reality while using those same equations to solve the problem. A picture *is* worth a thousand words. We can see the (Vfor+Vref)/(Ifor/Iref) impedance displayed right there on the SWR circle. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
In article , Bob Miller wrote:
On Mon, 01 Nov 2004 04:54:54 -0000, Barnacle Bill wrote: In article , Bob Miller wrote: On Sat, 30 Oct 2004 23:52:24 -0000, Barnacle Bill wrote: Some of us have gotten spoiled rotten by our wideband connections. I for one have a T1 at work and do most of my downloading there. Maybe it's time to step back, take a deep breath, and recall when we had a 1200 baud modem! ;^) BB I still have my little Radio Shack Model 100 portable pc, with its mighty 300-baud modem. Them was the times... bob k5qwg Hey, I still have mine too! In fact, I just dug it out of a 'mystery box' in the attic. It still works. Back in the 80's, I used in my land survey business; I wrote a COGO program in BASIC on it that worked like a charm... BB There's actually a user group for the little booger -- see http://www.club100.org/ bob k5qwg Wow! Tnx, I was gonna toss it. Not now! BB |
In article , Reg Edwards wrote:
Smith Charts went out of date wth slide rules and log tables with the advent of the pocket calculator. Be real engineers. Get yourselves into the 21st century. ---- Reg You know, I thought the same way for a while. In my land survey business, I progressed quickly into using Autocad and total stations with data collectors, but I never forgot the old ways. I could tape a 10,000 ft. line through moderate terrain with 1/50,000 accuracy/precision, and close a traverse with book of log tables and trig tables. Thanks to frequent power outages around here, and dead batteries, I got to use both. keep the old technologies alive! Bill |
Bill Turner wrote in message ... On Mon, 1 Nov 2004 11:44:40 -0700, "chuck" wrote: Hi Bob, What a disappointment - spending so much time in downloading your program (three attempts), only to have it fail in its installation. Your installer told me I have an outdated file it needs to replace. After allowing - and rebooting - the installer did not continue. When attempting another install, I get the same response... ad infinitum. Chuck, WA7RAI __________________________________________________ _______ I had a similar problem during install. Use msconfig.exe to shut off all background apps, reboot and reinstall. Worked for me. -- Bill W6WRT Interesting... I've never run across anything like this before. Did the apps that you shut down include your firewall, web-bug or Trojan detectors, and/or anti-virus apps as well? Chuck |
"Chuck" wrote in message news:AmGhd.4864$GN4.3904@okepread02... Bill Turner wrote in message ... On Mon, 1 Nov 2004 11:44:40 -0700, "chuck" wrote: Hi Bob, What a disappointment - spending so much time in downloading your program (three attempts), only to have it fail in its installation. Your installer told me I have an outdated file it needs to replace. After allowing - and rebooting - the installer did not continue. When attempting another install, I get the same response... ad infinitum. Chuck, WA7RAI __________________________________________________ _______ I had a similar problem during install. Use msconfig.exe to shut off all background apps, reboot and reinstall. Worked for me. -- Bill W6WRT Interesting... I've never run across anything like this before. Did the apps that you shut down include your firewall, web-bug or Trojan detectors, and/or anti-virus apps as well? Chuck I did not shut down anything, but on Windows XP I got 3 or 4 messages that said the file I was trying to install was older than what was already there. I kept the existing files. Installed and runs OK. BTW, downloaded at about 3 KBs. Tam/WB2TT |
Even though I did not have the advantage of attending Texas A&M, I agree
with Cecil. In classes for real electrical engineers, the Smith Chart still provides a superb means for instilling important concepts. A means that can then be reinforced with computations. In my experience, the greatest advantage of including the Smith Chart in real education resides in the long term effects. Forever, an engineer will be able to visualize effects and be able, even on the telephone, to describe effects to another similarly "equipped" engineer. The Smith Chart is an important part of the way we communicate. Its utility insures its preservation for a long time to come. 73 Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Cecil Moore" wrote in message ... Reg Edwards wrote: Smith Charts went out of date wth slide rules and log tables with the advent of the pocket calculator. An abstract math equation will get one the answer but not necessarily illustrate what is happening in reality. We see the results of that here on this newsgroup. The appeal of the Smith Chart is that it gives one a graphic conceptual grasp of reality while using those same equations to solve the problem. A picture *is* worth a thousand words. We can see the (Vfor+Vref)/(Ifor/Iref) impedance displayed right there on the SWR circle. -- 73, Cecil http://www.qsl.net/w5dxp |
"Tam/WB2TT" wrote in message ... "Chuck" wrote in message news:AmGhd.4864$GN4.3904@okepread02... Bill Turner wrote in message ... On Mon, 1 Nov 2004 11:44:40 -0700, "chuck" wrote: Hi Bob, What a disappointment - spending so much time in downloading your program (three attempts), only to have it fail in its installation. Your installer told me I have an outdated file it needs to replace. After allowing - and rebooting - the installer did not continue. When attempting another install, I get the same response... ad infinitum. Chuck, WA7RAI __________________________________________________ _______ I had a similar problem during install. Use msconfig.exe to shut off all background apps, reboot and reinstall. Worked for me. -- Bill W6WRT Interesting... I've never run across anything like this before. Did the apps that you shut down include your firewall, web-bug or Trojan detectors, and/or anti-virus apps as well? Chuck I did not shut down anything, but on Windows XP I got 3 or 4 messages that said the file I was trying to install was older than what was already there. I kept the existing files. Installed and runs OK. BTW, downloaded at about 3 KBs. Tam/WB2TT Hi Tam, Since I'm not running XP, perhaps this explains it, though this dosen't dispell my curiosity... I naturally distrust any freeware that installs abnormally... spyware, and all that stuff, y'know. Chuck |
i setup an apache web server at http://64.217.230.66/. try downloading from there, it should be faster. remove the obvious from my posted email address and let me know the outcome. larry kd5foy |
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