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Click for more detail... Have your wife make a lace dust cover and put training wheels on the back of your "light in the loafers" solid state amplifier. I want something that glows in the dark. Click on the above Eimac tubes. Beautiful!
^The above^ software is used to screen stations checking in on top band with 100 watts into a G5RV, Butternut vertical or using a MFJ tuner and a 80 meter coax fed inverted V on a city lot. QRP SUCKS - "QRP awards should go to the poor SOB that has to pull them out of the noise." Dan W5VJ
John and Donna with our four little Darlings. We are expecting our 5th grandbaby in December. Donna and I have been married 45 years.
Three generations of 20-wpm Extra Class. My dad Forest Gammon received W5GZU in 1938. His first rig was a pair of 6L6's on 160 and 80 meters CW and a National NC-100X receiver.
When I received my license in 1952 (age 11) my dad's rig was a Collins 310B1 driving a pair of 812's (250 Watts) on 80 through 20 meters and a National NC-183 receiver. He was CW only until I received my license, then he added an 811 modulator so I could work phone. His antenna was a 135 foot center fed dipole between two 50 foot power poles fed with homemade open wire transmission line with 6-inch spacing.
From 1959-1961 I operated F7HC from a US Army transmitter site in Orleans, France. Ran the Collins S-Line into a large three curtain rhombic antenna beamed on Washington DC. That is when I discovered how important a good antenna is. I talked to my dad everyday on 20-meter CW and SSB. I also had a BC-610 on 20 meter AM phone. Receivers were Collins R-388, R-390 and 75S1. My dad and I passed our Extra Class together at the Dallas FCC office in 1967. My Son John passed his extra class in 1991 (KI5SZ) and received his Grandfather's call W5GZU under the vanity call sign program.
Here is a 1960 photo of our US Army NATO transmitter site in Orleans, France. We had three Collins AN/FRT-22 (Army Navy / Fixed Radio Transmitter) 40kW output DSB transmitters into rhombic antennas. One sideband was 16 channels of multiplexed RTTY and the other sideband was voice. The tube line up was a pair of 4-400's driving a pair of 3CX2500's driving six 3CX2500's in grounded grid. . Notice the size of the open wire transmission line on top of the left transmitter. http://www.transmitter.be/col-anfrt22.html YES I put 40KW on 20 meter SSB a few times. With the 14dB gain from the Rhombic antenna the Effective Radiated Power was over one million watts with a takeoff angle of less than 10 degrees. I could not get anyone in the United States to believe I was in France. http://www.tpub.com/neets/book10/42o.htm
My current antenna is 140 feet per side 560' square loop (19,600-Sq-Ft) between four 70 foot power company high-line poles. It is fed with 275 feet of low loss open wire transmission line and matched with a small Johnson Matchbox (40M thru 10M), Ameritron ATR-30 (75M) and Palstar AT5K (160M). The poles are 18-inches in diameter at the base, weigh 2000 pounds each and are 8-feet in the ground. Three inch angle steel stingers at the top of the poles bring the height back to 70-feet, the maximum allowed by the City of Lucas. The size of the antenna poles can be compared with the standard REA power pole in the right back of the photo. I have 5+ acres for antennas. My lot is 250' wide X 1000' long. On 160M the loop is a one wavelength non-directional high angle "cloud warmer" giving great local coverage for Texas and Oklahoma. On 75M and 40M the loop is a lower angle (Long haul) antenna with a cloverleaf pattern NE-NW-SE-SW. On 20M -10M the loop has multi-wavelength major lobes and a very low angle of radiation making it a good DX antenna. At the bottom of this page there are two great articles that covers everything you should know about a horizontal to the ground loop:
160 meter Loop Antenna patterns. Major lobes NE NW SE SW on 80 and 40 meters.
North East North East
80 meters 40 meters 20 meters 10 meters 2-Wavelengths 4-Wavelengths 8-Wavelengths 16-Wavelengths 10dB nulls 30dB nulls
Installing one of the 70 foot power poles. Compare the size of the pole with the installer. In the background is a 75 meter delta loop (90 feet per side) at 50 feet. A photo album of the 160 meter loop project is loacated at: http://www.jlgammon.com/main.php?g2_view=core.ShowItem&g2_itemId=11045&g2_navId=x8c41604d click on upper right photo album.
My 1500 +watt+ dedicated 160 meter only (1990 KHz) station is a Yaesu FT1000MP Mark-V driving a 16dB gain grid driven pair of 4CX800's (QRO HF-2500DX) into an Palstar AT5K antenna tuner. 40 watts of drive = 1500 watts out. http://www.qrotec.com/HF25photos.html My 1000 watt 80 thru 10 meter station is a Kenwood TS-850 driving a 10dB gain single Eimac 3-500Z grounded grid amplifier (Heathkit SB-1000) into a decated Ameritron ATR-30 antenna tuner for 75 meters (3819 kHz). I use a 1950's link coupled small Johnson matchbox on 40 thru 10 meters. This is also my backup station for 160M.
To the right of my radio desk is a Sony 13 inch SD television to monitor Fox news while watching HD programs on the 27 inch LCD below. Both television sets are connected to a Dish Network VIP622 HDTV DVR. Oklahoma coach "Big Game Bob" Stoopes looks on as the Zero-U Chokelahoma Sooners lose their fifth straight BCS bowl. He looks like someone shot his pet rabbit. On top of the Satellite receiver is an electronic picture frame with over 3000 random grandkids pictures. Under the Satellite receiver is a 110 watt per channel audio amplifier that uses digital optical cable from the Satellite receiver for Dolby 5.1 surround sound. On the right is my is my Alienware Area-51 liquid cooled quad core computer and Dell 24 inch LCD monitor that is a hand me down from my wife. This was her bleeding edge game machine two years ago. http://www.alienware.com/products/area-51-x58-desktop.aspx?SysCode=PC-A51-X58&SubCode=SKU-DEFAULT http://www.dishnetwork.com/downloads/pdf/product_brochures/ViP622_ProductSheet_HighRes.pdf
Motorola Canopy 3-Mbps downstream 5.7GHz wireless internet (DFWair.net) is used as a backup system for 6-Mbps downstream AT&T DSL. Dish Network satellite antenna used to receive 100 channels of HDTV including HBO, Cinemax, Showtime, Starz and of course Fox News HD.
Over the air "double clutching signal sucking" log periodic HDTV antenna at 50 feet. I receive 43 DFW digital television stations that include two 24/7 weather radar channels. The top antenna is a non-directional FM broadcast antenna that has been replaced by Sirus / XM satellite radio.
My Oklahoma wife Donna mowing the front yard with her zero turn John Deere See a short video of Donna on her BIG John Deere. www.johngammon.com Click on "Donna on the John Deere" at the top of the page.
Dallas Cowgirl's High Kick Texas Longhorn - "I hates them Sooners" Rules for all the damn Yankee drugstore Cowboys "All hat and no cattle" http://www.cowboyway.com/CowboyQuotes.htm
W5VYY Quotes Page: (-SK after a call = Silent Key) "Never ask a man where he is from. If he is from Texas he will tell you, if not, there is no need to embarrass him." Udell Brown W5RJM--See video's of Udell telling stories at the top of http://www.johngammon.com "When she was pregnant she looked like a bale of cotton with the middle tie busted." W5RJM-SK "He is so cheap, he would not pay a dime to see a piss ant eat a bale of hay." W5RJM-SK "Never take on anyone who buys printing press ink in 55-gallon drums" W5RJM-SK In business: "You can shear a sheep a bunch of times, but you can only skin him once." W5TYG-SK On old age: "Never look over your shoulder, something may be gaining on you." K5CX-SK On rubber ducky commandos and appliance operators: "Their numbers are legion." K5CX-SK "I have never met a woman that didn't need a little counseling." K5CX-SK "I am too old to suffer fools" K5CX-SK On boring checkins: “He is like Brylcreem, a little dab'll do ya” K5CX-SK "A mobile antenna on 160M and 75M is an air cooled dummy load. You can't fool Mother Nature." K5CX-SK "It is first class, downtown, USDA choice, grade 'A' prime" K5CX-SK "If you can put your back to the wall of your house and pee on the neighbor's wall, you are in the ghetto." K5CX-SK "OM, your audio sounds like a bumble bee in a gourd blossom" K5CX-SK "You can not fix a radio over the radio" W5JDZ-SK "You shouldn't discuss politics or religion on the radio" W5JDZ-SK "You shouldn't give an anal person an opening." W5LH-SK "It's none of your damn business" W5XJ-SK "This is what's left of W5XJ" W5XJ-SK Just before his death: "I am going on ahead and will be waiting on you guys" W5XJ-SK "Yankee's are trouble" K0ZPN "The second amendment should have been the first." K0ZPN "Contests belong in the Olympics" K0ZPN “Never try to change a Leopard's spots! You’ll wind up getting the paint all over you!” K0ZPN "Once you get to the 10KW level put your money in the antenna system" KK5O "I have a lot of radio's and I ain't married to none of them" Hoss Trader Brent KK5O What determines top band performance? "Fire and Wire" KD5MEX David's Golden Rule: "Those who have the gold make the rules" KD5MEX "I can see a train wreck coming" KD5MEX "The gates are down, the lights are flashing, but the train isn't coming" KD5MEX An expert is someone who knows a great deal about very little and keeps on knowing more and more about less and less until he knows everything about nothing. WD5J "A word to the wise ain't necessary it's the stupid ones who need the advice" K5WGA "You can't cure stupid" K5WGA "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." K5WGA & AE5PL Software Engineers "Everyone is entitled to be stupid, but some abuse the privilege." K5WGA "Never argue with an idiot. He will bring you down to his level and beat you with experience." K5WGA "You are depriving a village somewhere of an idiot" K5WGA "If he were any more stupid, he'd have to be watered twice a week" AE5PL "The wheel is turning but the hamster is definitely dead" AE5PL "It's impossible to believe the sperm that created him beat out 1,000,000 others" AE5PL
"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great" W5RLM "QRP awards shoud go to the poor SOB that has to pull them out of the noise." W5VJ
"One thing I have learned in life: People do not change" W5VJ On the use of a concealed weapon: "I would rather be tried by 12 than carried by 6" W5VJ "I don't know how you can be a fan and watch the Dallas Cowboy games when all they do is let you down year after year." W5VJ OU fan "I don't know how you can be a fan and watch the Oklahoma Sooner games when all they do is let you down year after year." W5VYY after five straight Oklahoma BCS bowl losses. "If your antenna stays up through the winter, it was not big enough." K5PY "Curiosity killed the cat, but for a while I was a suspect" K5PY 'If you take your hands off the car, I'll make your birth certificate a worthless document.' Deputy Billy Brown K5PY 'You didn't think we give pretty women tickets? You're right, we don't. Sign here.' Deputy Billy Brown K5PY 'I'm glad to hear that the Sheriff is a personal friend of yours. So you know someone who can post your bail.' Deputy Billy Brown K5PY . 'No sir, we don't have quotas anymore. We used to, but now we're allowed to write as many tickets as we can.' Deputy Billy Brown K5PY 'The answer to this last question will determine whether you are drunk or not. Was Mickey Mouse a cat or a dog?' Deputy Billy Brown K5PY . 'Warning! You want a warning? O.K, I'm warning you not to do that again or I'll give you another ticket.' Deputy Billy Brown K5PY 'Yes, sir, you can talk to the shift supervisor, but I don't think it will help. Oh, did I mention that I'm the shift supervisor?' Deputy Billy Brown K5PY 'You don't know how fast you were going? I guess that means I can write anything I want to on the ticket, huh?' Deputy Billy Brown K5PY 'Can you run faster than 1200 feet per second? Because that's the speed of the bullet that'll be chasing you.' Deputy Billy Brown K5PY 'You know, stop lights don't come any redder than the one you just went through.' Deputy Billy Brown K5PY "The three most important things for a good signal, Antenna, Antenna, Antenna." W5VYY "No good deed goes unpunished" W5VYY "It is easier to get forgiveness than permission" W5VYY "The squeeking wheel gets oiled, but if it squeeks again it gets replaced." W5VYY "Be careful what you wish for, you just might get it" W5VYY "I would never die for my beliefs because I might be wrong" W5VYY "Jealousy is such a terrible thing." W5VYY "Do unto others as they would do unto you, only do it first" W5VYY "There is always one more imbecile than you counted on." W5VYY A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila. W5VYY ""The best you can hope for when using a ferrite core balun or a trap antenna is a little loss and a little TVI." W5VYY "The guy with the weakest signal does 90% of the talking." W5VYY "If you talk long enough to take a breath, you have talked too long." W5VYY "If you are in a 20-station roundtable, don't try to make every other transmission." W5VYY "If you want to make 10-minute transmissions, go to the AM window and wait your turn." W5VYY "Verticals radiate equally poor in all directions." W5VYY "For every $1 spent above ground, you should spend $10 underground to make a vertical to work." W5VYY "Traps should be spelled with a 'C'." W5VYY "Coax is for city folks" W5VYY
I was in a long hard fight with AT&T trying to get 6-Mbps DSL service. I sent my son John an email telling him I had whooped AT&T and was on the new 6-meg service. Here is his reply: Alexander the Great once climbed to the top of a mountain to survey his kingdom. Standing on the peak of the mountain, he realized that his kingdom extended in every direction, as far as the eye could see. When he realized this, he broke down in tears. “He wept with sorrow,” Plutarch said, “Because there were no more worlds to conquer.” My son W5GZU QRZ.com web page: http://www.qrz.com/callsign/w5gzu See all the 1990/3819 station pictures: http://www.jlgammon.com/main.php?g2_view=core.ShowItem&g2_itemId=11045&g2_navId=x8c41604d Want to know how good Police radar is? Click on Stalker video and Stalker Lidar in the news at the top of www.johngammon.com Want to see a feel good story? Watch my daughter-in-law: Lorrie on Fox4 and Lorrie on CNN at the top of www.johngammon.com
Subject: Loops by David Fischer W7FB Link to David Fischer's original Nov 1985 QST Loop Skywire article http://www.johngammon.com/LoopSkywire.pdf Read this before the article below. About David http://www.nq4i.com/operators/details/w7fb Chief Scientist at HyGain - University Kansas/Illinois/Nebraska Prof of Mathematics/Mathematical Logic. xW0MHS Author of The Loop Skywire (Nov 85 QST and all the handbooks since...) A lot has been written about loop antennas. Some of it not so. A large loop is one whose circumference is at least one wavelength at the frequency of operation. This discussion relates to large loops. View original article at: Last modified: Sat Jul 4 11:15:45 2009 Does this page contain inappropriate content? If so, Report this page... |
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