[Antennas] L & C Calculator Links

Sat, 27 Apr 2002 16:11:56 -0500

someone mentioned they would like to buy a N-515-T slide rule.
here is one on ebay at $10 so far
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1096937954

73 and good luck
van

At 01:19 AM 4/26/02 -0500, van lincoln wd8aam wrote:
>=============================================================================
>When I attended CIE (cleveland institute of electronics) in 1969, they
gave me
>a 'real slide rule (aluminum, i think it was a K&E) that had the LC, and
other
>electronic formulas on it.  Hairline pointer, and all.  I value it highly.
>
>I have noticed that ebay has these 'real slide rules' on auction, and several
>electronic ones show up several times a month.  do a search on 'slide*
>rule* electronic*',
>on ebay, you might really enjoy a 'real' one (precision one).
>
>73
>van
>=============================================================================
>
>for printing, try irfan or acdsee, both good graphics
>programs for printing scanned images, and both free on the web.
>
>http://www.irfanview.com/
>http://www.acdsystems.com/English/index.htm
>
>van
>
>=============================================================================
>
>Van,
>
>Wow, thanks a gigacycle for these .....What fun... A computer program cannot
>let you visualize the relationships like this intuitive device.  Newer is
>not always better.
>
>Maybe ARRL would care to print these and make them available ??
>
>----------------------
>I did print the Allied one.  I had to make up a local 'web page' (file named
>'lca1.html') with the following content:
>
><img src="alliedLC1.jpg" width="484" height="850">
>
>Made one of these for all four pieces.  Although overly simplistic, this
>seemed the easiest way to play with the ratio of the two to get the windows
>to align.  I am not an HTML giant and I'm sure there is a neater and sexier
>way to do this with html tables.
>
>I then had to play with the relationship of the 'slider' pages with the
>front/back ones.  This would probably vary somewhat from PC to PC based on
>screen resolution, screen H-W ratio, printer type, browser version, etc....
>My system seemed to do best on the Allied one with the front/back at 484/850
>and the inner sliders at 440/850.  The Shure ones look a bit different.
>
>After practicing some 'Arts&Crafts 101' skills, I have a working model of
>the Allied one.  Nothing to write home about, but great to have.... Thanks a
>gigacycle.
>
>There are copyright notices on both these.  Allied is still in business as a
>division of Avnet (Dallas area).  Shure was, I believe, was bought by
>Motorola many moons ago.  The original Shure building (on  Shure Drive,
>Arlington Heights, IL) is now a Motorola property and part of their
>Infrastructure group (radio systems and paging/cell switches).
>
>These companies could create some tremendous goodwill by reproducing these
>in something durable like plastic or aluminum.  I'm sure all of us would buy
>a pair or two, even if they are only used as wall hangings or paperweights.
>I'll be on the lookout for these at swaps and garage sales.
>
>73
>Frank
>
><<---  END OF MESSAGE --->>
>----- Original Message -----
>From: "van lincoln wd8aam" <[email protected]>
>To: "A10382" <[email protected]>
>Sent: Wednesday, April 24, 2002 9:05 PM
>Subject: Re: [Antennas] L & C Calculator
>
>
>> here you go....evidently the url's are now out of date, and probably
>> no longer exist...here is some off my site.
>>
>> ok, here are the URL's, i put them on my website.  I am NOT making
>> them available to everyone, as I have a bandwidth problem.  the size of
>these
>> files is 6+ megs, and I am only allowed 25 for download a month.
>> enjoy, and maybe YOU can pass them along.
>> van wd8aam
>>
>>
>> http://www.geocities.com/vlincoln1735/alliedLC1.jpg
>> http://www.geocities.com/vlincoln1735/alliedLC2.jpg
>> http://www.geocities.com/vlincoln1735/alliedLC3.jpg
>> http://www.geocities.com/vlincoln1735/alliedLC4.jpg
>>
>> http://www.geocities.com/vlincoln1735/shure1.jpg
>> http://www.geocities.com/vlincoln1735/shure2.jpg
>> http://www.geocities.com/vlincoln1735/shure3.jpg
>> http://www.geocities.com/vlincoln1735/shure4.jpg
>>
>>
>> http://www.geocities.com/vlincoln1735/readme.txt
>>
>> =======================================================================
>>
>> At 08:11 PM 4/24/02 -0400, you wrote:
>> >Hmmm... been trying to open these pages, but no luck.  Is the spelling OK
>> >?.....   Is it case sensitive ?....  Is it being bombarded with users
>?.....
>> >
>> >
>> ><<---  END OF MESSAGE --->>
>> >----- Original Message -----
>> >From: "van lincoln wd8aam" <[email protected]>
>> >To: "Tom Reid" <[email protected]>; "Tom Bates" <[email protected]>;
>> ><[email protected]>
>> >Sent: Sunday, April 21, 2002 5:55 PM
>> >Subject: Re: [Antennas] L & C Calculator
>> >
>> >
>> >> here you go....from sandy.....
>> >>
>> >> Reply-To: <[email protected]>
>> >> From: "Ron D' Eau Claire" <[email protected]>
>> >> To: "Sandy W5TVW" <[email protected]>, <[email protected]>
>> >> Subject: GB> Coil and Reactance Calculators
>> >> Date: Thu, 13 Dec 2001 12:56:08 -0800
>> >> Importance: Normal
>> >> Sender: [email protected]
>> >>
>> >> I just picked up my genuine replica Allied Radio "RF Resonance and Coil
>> >> Winding Calculator" to check the tuning range of a circuit and it
>reminded
>> >> me to say a BIG "Thanks!" to Sandy, W5TVW, for providing the images for
>> >the
>> >> calculators on his website (the URL's are below).
>> >>
>> >> When he announced them I took a peek and recognized the Allied one as
>> >> something I had many years ago, so just for fun I downloaded the images
>> >and
>> >> printed it out on my ink-jet printer using 110 pound cover stock. Made
>the
>> >> slide up of two sheets stuck back to back so it has some real body, and
>> >then
>> >> fashioned two double thickness 'shims' to act as guides and keep the
>> >outside
>> >> covers from binding on the slider. Trimmed out the bits with a sharp
>> >X-acto
>> >> knife and stuck it all together with a glue stick.
>> >>
>> >> It looked so good that my wife picked it up and said, "Wow! This is a
>real
>> >> antique!". I had to make her feel for the rivets and see that they were
>> >only
>> >> images to prove it wasn't 'real'. With the shims running the length of
>the
>> >> calculator acting as guides for the slider, I suspect that it works
>better
>> >> than the original with the riveted construction.
>> >>
>> >> Then I discovered how USEFUL it was. In these days of calculators
>pounding
>> >> out answers to 6 decimal places, it's really FB to be able to wiggle
>the
>> >> slide and see in an "analog" way (like my brain works) how the size or
>> >turns
>> >> of a coil affect its inductance, or simply scan the scale and see what
>> >> tuning range my 25-350 pf variable will have with any size of
>inductance.
>> >>
>> >> I went right back and got the Shure calculator too. They are so much
>more
>> >> friendly and fast to use than my calculator, and the results are as
>> >accurate
>> >> as anything I need to make a circuit perform like I want it to.
>> >>
>> >> I'm going to save the images because I can see that I'll wear the ones
>I
>> >> made out before long. Besides, there's a whole generation of hams who
>> >don't
>> >> know about them. Seeing a new builder punching in strings of numbers to
>> >find
>> >> the resonant frequency of a circuit on his calculator, I had to give
>him a
>> >> set. He was AMAZED at how easy it can be. I'll probably give more
>copies
>> >> away as time goes on.
>> >>
>> >> Back in the "pre-calculator" days I found the design of nomographs and
>> >> specialized slide rules like this a fascinating mixture of artistry and
>> >> engineering. It seems to be an art that has died out under the
>onslaught
>> >of
>> >> digital number crunchers. But that doesn't mean that the digital
>machines
>> >> are better, or even "as good" as the simpler tools for many purposes.
>> >>
>> >> Guess that's why telegraph keys are still around too, Hi.
>> >>
>> >> Ron AC7AC
>> >>
>> >> Oh... here's the URL's Sandy provided for those images:
>> >>
>> >>
>> >> http://asti.net/W5TVW/alliedLC1.JPG
>> >> http://asti.net/W5TVW/alliedLC2.JPG
>> >> http://asti.net/W5TVW/alliedLC3.JPG
>> >> http://asti.net/W5TVW/alliedLC4.JPG
>> >>
>> >> http://asti.net/W5TVW/shure1.JPG
>> >> http://asti.net/W5TVW/shure2.JPG
>> >> http://asti.net/W5TVW/shure3.JPG
>> >> http://asti.net/W5TVW/shure4.JPG
>> >>
>> >>
>> >> http://asti.net/W5TVW/readme.txt
>> >>
>> >>
>> >>
>> >>
>> >> =======================================================================
>> >> At 05:29 PM 4/21/02 -0400, Tom Reid wrote:
>> >> >I got mine from the ARRL a long time ago
>> >> >----- Original Message -----
>> >> >From: Tom Bates <[email protected]>
>> >> >To: <[email protected]>
>> >> >Sent: Friday, April 19, 2002 5:50 PM
>> >> >Subject: [Antennas] L & C Calculator
>> >> >
>> >> >
>> >> >> Greetings...
>> >> >>    Anyone know where I can find one of those old cardboard slide
>rule
>> >> >calculator
>> >> >> gadgets which was used to find L, C, or Res Freq when 2 of the 3
>> >variables
>> >> >were
>> >> >> known ?  I think Allied used to sell them years ago.
>> >> >>    Thanks es 73,   Tom   AA1NZ
>> >> >>
>> >> >> - - -
>> >> >>
>> >> >> Your moderator for this list is:
>> >> >> Larry Wilson KE1HZ [email protected]
>> >> >> _______________________________________________
>> >> >> Antennas mailing list
>> >> >> [email protected]
>> >> >> http://mailman.qth.net/mailman/listinfo/antennas
>> >> >>
>> >> >
>> >> >- - -
>> >> >
>> >> >Your moderator for this list is:
>> >> >Larry Wilson KE1HZ [email protected]
>> >> >_______________________________________________
>> >> >Antennas mailing list
>> >> >[email protected]
>> >> >http://mailman.qth.net/mailman/listinfo/antennas
>> >> >
>> >> - - -
>> >>
>> >> Your moderator for this list is:
>> >> Larry Wilson KE1HZ [email protected]
>> >> _______________________________________________
>> >> Antennas mailing list
>> >> [email protected]
>> >> http://mailman.qth.net/mailman/listinfo/antennas
>> >>
>> >
>> >
>>
>
>At 08:19 PM 4/25/02 -0500, Karl Kanalz wrote:
>>I got the same results..... "This page not found...."
>>
>>Karl K - W8TIF
>>McKinney, Texas
>>
>>-----Original Message-----
>>From: Mike Gilchrist
>>Sent: Thursday, April 25, 2002 8:08 PM
>>To: van lincoln wd8aam; Tom Reid; Tom Bates; [email protected]
>>Subject: Re: [Antennas] L & C Calculator
>>
>>Ron et al:
>>
>>I just got around to checking the listed links to download the images.  The
>>link appears to have died.  Was there a copyright infringement or something?
>>
>>Mike kf4fdj
>>
>>
>>- - - 
>>
>>Your moderator for this list is:
>>Larry Wilson KE1HZ [email protected]
>>_______________________________________________
>>Antennas mailing list
>>[email protected]
>>http://mailman.qth.net/mailman/listinfo/antennas
>>
>- - - 
>
>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
>_______________________________________________
>Antennas mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/antennas
>