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eHam Forums / Antennas and Towers and more / RE: 80/40 loaded/trapped dipole
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on: May 06, 2013, 08:26:37 AM
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August 2012 Q&A on this related antenna subject http://www.eham.net/ehamforum/smf/index.php?topic=84914.0The 40/80-meter dipole (trapped, loading coils, fan) was very popular from 1950 to 1980 with Novice operators. The antenna would often function well on 15 meters, using the 40-meter section as a 3/2-wavelength dipole. Designing a Shortened AntennaQST Magazine, October 2003, Pages 28-32 by Luiz Duarte Lopes, CT1EOJ http://forums.qrz.com/showthread.php?316598-Designing-a-Shortened-AntennaWilliam J. Lattin, W4JRW Multiband antenna - December 1960 and April 1961 QST magazine http://www.hamuniverse.com/lattin5band.htmlBill Fanckboner, W9INN (sk) designed, built, and sold a number of shorted wire antennas until 2004, when he passed and his family shuttered the business. http://www.qsl.net/n0nv/w9inn.htmlAll of Bill's antenna designs used only 2 dipoles/elements (fan dipole). Bill's inline coils (Resonators) are 2" OD forms (dark gray) and coil length 2-1/2" with the plastic form longer for wire attachment (5 to 12 inches common) One foot wooden dowels are used to separate the two dipoles. W9INN Sloper - Instructions http://www.radiomanual.info/schemi/ACC_antenna/W9INN_SLOPER_user.pdfW9INN - MPD-5C Max http://www.qsl.net/n0nv/w9inn.htmlhttp://hamgallery.com/Tribute/W9INN/w9inn.pdfIF you desire DIY, start your design with the K7MEM Short Dipole Calculator. http://www.k7mem.com/Electronic_Notebook/antennas/shortant.htmlCoil Inductor Calculator http://hamwaves.com/antennas/inductance.htmlFollow diagrams for Building the Resonators, per Bill's diagrams. Homebrew Your Own Inductors by Robert H. Johns, W3JIP, QST, Aug 1997, p 35 http://www.arrl.org/files/file/Technology/tis/info/pdf/9708033.pdf1-1/2 inch Schedule 40 PVC (gray) Electrical conduit has a 1.9 inch O.D. Very good form for winding the 2 inch loading coils (this is what most builders use). Alpha-Delta and now MFJ later commercial antenna designs. Hy-Power Antenna Company in Bethlehem, PA offers the loading coil and parts. http://www.hypowerantenna.com/products/dipolesHy Power Antenna Company 2028 Riverside Drive Bethlehem, PA 18015 http://www.hypowerantenna.com/Phone: 610-317-9779 Email: bgk3x@ptd.net
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34
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eHam Forums / Elmers / RE: Ungar soldering irons
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on: May 06, 2013, 07:49:50 AM
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Actually I was looking for Chisel tipped one that looked like the #4036 with the ceramic element, not the long metal element .... That would be an Ungar 45 or 50 watt heater element (Ungar used ceramic for insulator due to high heat ~ 1100 o F) with an Integrated Chisel/Screwdriver tip. However, as I noted to you earlier, Fabrication/Production changed after Weller acquired the Ungar products -- some of this was RoHS compliance required, other was for easier production methods. Weller has discontinued many Ungar ceramic heating elements. These models are popular with the Stained Glass Industry. http://www.glassmart.com/ungar_45_kit.aspThe Integrated Long Chisel Tip with a 45 Watt heater is part # 4033. The Integrated Short Chisel Tip with a 45 Watt heater is part # 4039. Arcade Electronics, near your QTH, has parts stock ! You will need the Ungar part number to inquire, Chester Electronics in Kenosha, WI has some Ungar inventory still left.
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35
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eHam Forums / Elmers / RE: Ungar soldering irons
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on: May 06, 2013, 06:24:27 AM
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The 1233S and 533S appear to be screw on tips, and I find them not as acceptable to the larger items I want to solder since they won't sink as much heat. NON-SEQUETER. You asked for a LOWER WATTAGE (33 watt) and desired a Chisel Tip that is Integrated with the Ungar Heater. Modular Heater with Integral Long Chisel Tip, 33 Watt, 900°F: # 1233SThat is EXACTLY what part number #1233S is. I HIGHLY suggest that you purchase more than one, IF this is the tip you desire !!ALL-SPEC, listed as in stock. http://www.all-spec.com/products/1233S.htmlWASSCO, listed as in stock http://www.wassco.com/Products/33W-Heater-with-Integral-Tip-900°F--Weller-1233S__UNG-1233S.aspx Mouser even lists this part ! http://eu.mouser.com/ProductDetail/ApexToolGroupFormerlyCooperTools/1233S/?qs=xQzVGq%252bQa3HDpo59L3hMmMcBooygEUlvThe Ungar INTEGRATED TIP and HEATER selection (variety) in currently available replacements are now limited, since the Ungar/Weller merger in 1996. Arcade Electronics in Alexandria, VA should be able to assist you.
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36
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eHam Forums / Elmers / RE: Who made the 2-element "Bowtie Bantam" beam?
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on: May 06, 2013, 05:41:06 AM
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In the late 1950s, QST magazine featured a number of antenna designs. Many of these designs became the commercial antennas or antenna parts, that are sold today by Hy-Gain/MFJ, Hustler/Newtronics, Mosley, Cushcraft/MFJ, Butternut/Bencher, Reyco/Unadilla, Mini-Products/TCM Communications, etc. In 1957, Ralph Rosenbaum, W5ECP designed the 20 meter Wonder Bar antenna. The W5ECP antenna project was published in June 1957 issue on pages 44-45 of QST magazine. http://p1k.arrl.org/pubs_archive/38975Here is an updated DIY Build of this 20 meter Wonder Bar antenna. http://www.hamuniverse.com/20meterwonderbar.htmlIt was a scaled-up version of E.T. Bishop's K6OFM's 10-meter "Wonder-Bar" antenna published in November 1956 issue on pages 32-33, 138 of QST magazine. The E.T. Bishop design used readily available Biconical TV antennas to fabricate this antenna. Since it looked like a common 1950s TV antenna, neighbors did not complain, in this era.http://p1k.arrl.org/pubs_archive/38488Updated DIY Build of this 10 meter Wonder-Bar antenna. http://www.hamuniverse.com/wonderbar.html=== 2-Element Wonder Bar beam antenna, by G.G. Ryan, W5JMQ QST magazine, February 1957, p. 43 and 134, WonderBar 2-el beam on a 5-ft boomhttp://p1k.arrl.org/pubs_archive/39393The Butternut Butterfly antenna, patented in 1985 by Donald Newcomb(sk), shares some concepts/design elements with the 1950s single band Wonder Bar designs. http://www.bencher.com/pdf_download.html
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eHam Forums / Elmers / RE: Ungar soldering irons
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on: May 05, 2013, 04:30:41 PM
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David - Weller purchase Ungar Soldering in 1996. Some old Ungar models were discontinued by 2000 (millennium), while others have been slowly discontinued since 2003. Weller had to rework its entire production operations for RoHS compliance, which they did when they moved production to Mexico.Ungar's old Edison screw-on soldering iron handles are sold/supported (heaters: 45, 33, and 23 watt), with an integrated soldering iron tip OR with interchangeable threaded soldering tips. You need to WATCH, as Weller has discontinued some slower selling parts (wattages, tips).The Ungar 4036-S is a Stainless Steel Heater - 45 watt - 1100 degrees - Pyramid Tip Arcade Electronics (Washington DC area) has that part IN STOCK for $34 http://www.arcade-electronics.com/Ungar-4036-S-p/ung-4036-s.htmThere is a 4036 Iron Clad Silver Plated Tip 50 W for sale on eBay for $19 from a Pennsylvania seller, right now. eBay Item Number: 321085885701 === You stated you desired a 33 WATT Heater / Tip. HERE are those part numbers, with an integrated heater and iron tip. These heater/tips are used with Weller/Ungar standard series modular irons SL325, SL335, SL345 and SL500Modular Heater with Integral Long Chisel Tip, 33 Watt, 900°F: # 1233S Modular Heater with Integral Long Chisel Tip, 23 Watt, 800°F: # 533S The other Heaters sold in this series permit a screw on soldering tip (more flexible). == w9gb
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eHam Forums / Mods And Repairs / RE: Trouble finding exact Battery Replacement Kenwood TS-950SD S/N 1010625 CR2430
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on: May 05, 2013, 12:28:38 PM
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Pure metallic Lithium is stored is mineral oil or other oil solution to prevent reaction (water in air/humidity). I saw my first demonstration of a chunk of lithium (size of one Vegas dice cube) and Water in high school chemistry -- safety glasses were mandatory. Typical of Clark's experience, explodes into flame. It is an Exothermic reaction, so the heat released often ignites the hydrogen gas given off.Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen gas. The colourless solution is highly alkalic. The exothermal reactions lasts longer than the reaction of sodium and water, which is directly below lithium in the periodic chart. 2 Li(solid) + 2 H 2O -> 2 LiOH (aq) + H 2(gas) At 750 oC lithium reacts with hydrogen to lithium hydride (LiH). The white powder that forms releases hydrogen gas upon later reaction with water, in amounts of 2800 liter per kilogram hydride. As such, lithium is always studied for its application as hydrogen storage. Seawater contains approximately 0.17 ppm lithium. Rivers generally contain only 3 ppb, whereas mineral water contains 0.05-1 mg lithium per liter. Large amounts of lithium were found in holy water from Karlsbad, Marienbad and Vichy. In solution it is only found as Li+ (aq). Read more: http://www.lenntech.com/periodic/water/lithium/lithium-and-water.htm#ixzz2SRrJhy4h
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eHam Forums / Company Reviews / RE: Is the Wireman still open?
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on: May 05, 2013, 08:43:25 AM
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I placed an order online this past weekend and have yet to hear from them. Is the Wireman still in Business? If not why is the website still up and running? I hate to think that my credit card number is just sitting there for some hacker to find. Roland - I placed a regular order (telephone) with The Wireman same week you posted. I use the telephone, since I usually pick-up "end of rolls" (coax, antenna wire, rotor cable) that are Specials or Clearance items (First Come, First Get) -- added to my orders. I also check on some items that are getting harder to source (ladder-line), due to only one cable mfg. in USA still making it.My Order arrived promptly a couple days later. I have been dealing with Pres, N8UG since late 1970s. Today, his staff / family handles much of the day-to-day orders and he doesn't attend the number of hamfests that he use to attend 30 years ago -- but neither do I !! -- They are planning on attending Dayton, hope for good weather.-- BTW, DX Engineering with their nice Internet merchandise web site ($$) have a full-time staff working on Internet. They have made mistakes with my orders in past -- BUT we have always resolved the issues with a telephone call or e-mail. Part of the e-commerce game.
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eHam Forums / Antennas and Towers and more / RE: Hy-Power Dipole way out of band
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on: May 05, 2013, 04:25:41 AM
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Last June I purchased a Hy-Power 2 band dipole 2B2040LQ and finally got it installed today. As I live in an HOA subdivision, I had to install it in my attic. I just noticed in the instructions that it is not recommend it for indoor use. Perhaps that is why I am having SWR & resonance issues with it. Your Newnan neighborhood is HOA? I think you should be able to install a dipole or wire antenna at your pine tree line. Like the W9INN(sk) and Alpha-Delta antennas that use loading coils (inductors) to shorten the antenna's length -- nearby objects, especially metal, will easily de-tune them (high SWR). I don't know Barry, KU3X tuning setup for these antennas, but Bill, W9INN(sk) tuned his antennas at 35 to 40' above ground.
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eHam Forums / Antennas and Towers and more / RE: Advice on fixing my AV-640 vertical
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on: May 03, 2013, 03:58:38 AM
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WB2WIK, I will take the soldering iron up to the roof with some solder. If it is a cold solder joint, that would be Hy-Gain fault, and I can fix that. If one of the tuning spokes is loose, then it would be my fault. Tin/Lead solder & a soldering iron will not resolve (fix) Aluminum connections. Due to the weight/mass of the upper section on this antenna (and R7, R7000, R8), IF this antenna did not have small non-conductive guy wires -- the constant flexing in wind can loosen connections. The new Cushcraft R9 states usage of guys, for the same reason.
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eHam Forums / Elmers / RE: Need help to identify a radio seen on The Andy Griffith Show
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on: April 30, 2013, 03:29:00 PM
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The Motorola console is a common remote base frame (vacuum tube). Various modules could be added to that case.
My Dad had one, when he built his office in town (early 1960s) -- it remotely operated (via dedicated telephone circuit, 2 or 4-wire) the 46 MHz T radio at our house. Operated that way until 1990.
w9gb
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