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Topic: SWR

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	SWR, Return Loss, and Reflection Coefficient
		SWR, which stands for standing wave ratio, may be illustrated by considering the voltage at various points along a cable driving a poorly matched antenna.
		The SWR for terminations between these two extremes may be calculated by considering the interaction of the reflected wave with the incident wave to determine the minimum and maximum voltages.
		SWR is a useful number for evaluating the actual voltages and currents present along transmission lines and SWR can be directly measured in many cases but it is often more convenient to work with other, equivalent measures.
	www.wenzel.com /documents/swr.html (2166 words)

	B-294266.2; B-294266.3; B-294266.4, SWR, Inc.--Protest and Costs, April 22, 2005
		SWR asserts that this weakness was unwarranted because its tool plan in fact is "virtually" the same as Starlight's, and the agency did not assign a similar weakness to the awardee's proposal.
		SWR asserts that the past performance evaluation--under which its proposal was assigned a score of 2 of the 5 available raw points--was flawed because it was inconsistent with the agency's assessment that SWR's performance record was overall more favorable than unfavorable.
		SWR concedes that the claim was not filed within the required 60 days, but requests that our Office nevertheless recommend payment because: the delay was due to counsel's mistake, the claim was presented less than 30 days after release of the redacted decision, and the agency was not prejudiced by the delay.
	www.gao.gov /decisions/bidpro/2942662.htm (2685 words)

	Wilson Antenna Tech support - General SWR Notes
		The SWR on a trunk lid mount is 3.0:1 on all channels.
		When the SWR meter needle slams the side on all channels this is generally an indication that you have a short in the system.
		When two SWR meters are used in one coax line, and the SWR does not read the same on both meters (assuming that the antenna is matched correctly), one or both of the meters are not balanced to 50 ohms.
	www.wilsonantenna.com /tsswrg.htm (1449 words)

	Studies in Writing & Rhetoric (Site not responding. Last check: 2007-10-21)
		SWR publications are intended for general compositionists: professionals interested in emerging intellectual trends and pedagogies, faced with time constraints from high teaching and service loads, and engaged in some research of their own.
		SWR encourages extended essays or research reports addressing any issue in composition/rhetoric from any theoretical/research perspective, as long as the general significance of the project is clear.
		SWR does not use a "blind" review process, so authorship may be indicated on the manuscript and other materials.
	www.unl.edu /SWR/pages/submissions.html (1211 words)

	THUNDERPOLE - Choosing your C.B. Antenna
		SWR is something that even very experienced CB'ers have trouble understanding, however this doesn't mean that you can ignore it and carry on regardless.
		SWR is very important to every CB set-up and should be checked every time a new antenna is brought or an antenna is moved.
		SWR is very important because if you have a high SWR reading then you will not achieve the best transmit range and if the SWR reading is very high (over 3:1) then the reflected power will come back down the antenna lead into the radio and destroy the output transistors in the radio!
	www.thunderpole.co.uk /4x4_what_is_swr.htm (875 words)

	Setting the SWR of Your Antenna© - Firestik® Antenna Company
		SWR (standing wave ratio), is a measurement of how efficiently your antenna system will radiate the power available from your radio.
		If SWR is in the "red zone" on all channels, you probably have an electrical short in your coax connectors, or your mounting stud was installed incorrectly and is shorted.
		If SWR on channel 1 is greater than that on channel 40, your antenna is considered to be "SHORT" and increasing the physical and/or electrical length of the antenna is required to correct this situation.
	www.firestik.com /Tech_Docs/Setting_SWR.htm (1398 words)

	SWR-INTRO
		In simple terms SWR compares the maximum amount of voltage or current that can be delivered by the radio to the minimum voltage or current that actually leaves via the transmission line and antenna.
		With the antenna tuned at channel 19, if you were to plot the SWR from channel 1 to channel 40, the results would be curved line with both channel 1 and channel 40 being equal but higher than channel 19.
		With that in mind, the SWR meter is placed in-line between the radio and the coaxial cable that feeds the antenna.
	www.firestik.com /Tech_Docs/swr-intro.htm (967 words)

	B-294266, SWR, Inc., October 6, 2004
		SWR, Inc. protests the terms of request for proposals (RFP) No. M00146-04-R-9024, issued by the U.S. Marine Corps (USMC) for the washing of various aircraft at three Marine Corps Air Stations (MCAS) in North and South Carolina.
		As for SWR, the contracting officer explains that she had serious doubts that the firm was capable of handling the larger requirement, based primarily on the firm's experience and past performance at Cherry Point.
		Specifically, she notes that the current contract under which SWR experienced performance problems represents only 5 percent of the new requirement and is restricted to one wash station, while the RFP requirement encompasses staffing and managing performance at multiple wash stations at three geographically separate locations handling more and different types of aircraft.
	www.gao.gov /decisions/bidpro/294266.htm (2774 words)

	SWR AND COAX
		SWR that is high on all channels (over 2:1 but not pegging the needle) after the antenna has been tuned normally indicates a ground plane or coax cable problem.
		You should seek SWR of 2:1 or lower on channel 1 and 40, but keep in mind that best performance may not be found at the lowest SWR readings.
		The SWR meters built into CB radios are okay for general readings, but are rarely sensitive and/or accurate enough for fine tuning of antennas.
	www.klimaco.com /klimacopages/swrand.htm (6288 words)

	What is standing-wave ratio? - a definition from Whatis.com - see also: SWR, VWSR, IWSR
		Standing-wave ratio (SWR) is a mathematical expression of the non-uniformity of an electromagnetic field (EM field) on a transmission line such as coaxial cable.
		Usually, SWR is defined as the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line.
		The SWR is the ratio of the RF voltage at a loop to the RF voltage at a node, or the ratio of the RF current at a loop to the RF current at a node.
	whatis.techtarget.com /definition/0,,sid9_gci852555,00.html (814 words)

	swr
		SWR staat voor Stichting Welzijn Rheden en omgeving.
		SWR staat midden in een samenleving vol met mensen met veelzijdige vragen en behoeften.
		Eigenlijk wil dit zeggen dat SWR mensen ondersteunt in hun zelfredzaamheid en dat op een veelzijdige en actieve wijze.
	www.swr.nl (157 words)

	Swahn - Testimonials of SWR (Site not responding. Last check: 2007-10-21)
		SWR solves this by having them learn all the sounds for that letter at once, so the child can easily decode a word when he comes to it and has not learned faulty rules.
		What SWR does is take that early "reading" (which is not really reading but repetitive decoding exercises) and put it into the context of spelling.
		So with SWR, your child is reading from day one, and he is being taught to read his words in a non-threatening environment (the support of your review/drill with him).
	home.comcast.net /~swahninfo/testimoni.htm (3657 words)

	Sound Control - SWR Bass Amplifers (Site not responding. Last check: 2007-10-21)
		The SWR sound was brought to life after a painstakingly long research process in which designers tried out many different electronic circuits for the preamp, the tone circuit, the power amp and everything in between.
		Today, more than 20 years after those first five units were made in a garage, SWR products remain true to the original spirit of the company, with the highest standards of quality.
		SWR's classic products are still manufactured and tested in southern California, less than 75 miles away from their birthplace.
	www.soundcontrol.co.uk /mod_1/pages/mod_1.1/pages/mod_1.1.8/pages/mod_1.1.8.1/pages/index.php?brand_ref=1.1.8.144 (779 words)

	SWR - Antenna Tuning
		SWR or Standing Wave Ratio of an Antenna is a measure of how efficiently your Radio is radiating the energy it produces when you transmit.
		If your SWR is still too high with the other Equipment in-line, removing them one at a time will show which Device is creating a problem.
		Transmitting when the SWR is reading in the Red portion of the Meter Scale is extremely dangerous to your Radio and can be quite expensive.
	members.tripod.com /~elevenmeter/anttuning.html (1431 words)

	The SWR. That great confussion... LU6ETJ. Argentina.
		A glance to this interesting graph shows that the losses to due SWR are, in general, very lower to those that are deduced from reading the "Reflected Power" indicated by the wattímeter.
		In presence of SWR the impedance that the line presents to the transmitter can be very different from that for which has been designed, with the problems that this carries.
		Whenever to adjust the antenna is easy and those losses for excess of SWR are important, it will be very convenient adjust it on the antenna side, in 90% of the remaining cases a good "L" or "Pi" network at the transmitter side, will provide us excellent and comfortable contacts.
	www.solred.com.ar /lu6etj/tecnicos/roe/En_roe.htm (1354 words)

	SWR Bass Amps
		SWR and its advisory board, consisting of some of the world's finest musicians, have constantly strived to identify the changing needs of musicians everywhere, and to respond with new and useful designs, each one unique unto itself.
		SWR amplification is handmade and individually tested in the United States.
		Everyone at SWR sincerely hopes that you are satisfied with your recent purchase, as we are extremely proud of the quality and attention that goes into each and every SWR product.
	www.accessguitar.com /inventory/swr/manuals/wm2004om.html (3285 words)

	SWR Product Listing \| Sweetwater.com
		SWR's 550x bass amplifier debuts with extra power and extra lows from the newest member of the X Series.
		SWR's 350x is the third in a series of upgrades to SWR's top-selling Bass 350 amplifier.
		The SWR Goliath Junior III is a 350-watt speaker enclosure with two 10" PAS drivers and a Foster tweeter.
	www.sweetwater.com /store/manufacturer/SWR (810 words)

	SWR Sound (Site not responding. Last check: 2007-10-21)
		SWR was the first to introduce features such as tube preamps, solid-state power amps, semi-parametric EQ, side-chain effects loops, pre/post XLR outputs, and the 4x10 with tweeter cabinet.
		SWR continue to forge ahead providing a diverse group of respected professional and working bassists with the most up-to-date technology available.
		The SWR Sound Story Founded by engineer Steve W Rabe in a Southern California garage back in June 1984, SWR Sound's original intent was to provide Los Angeles working professional bassists with high-fidelity no-compromise tone and power in an integrated head.
	www.swrsound.com.au (222 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		SWR Standing Wave Ratio or SWR is probably another mis-understood concept in radio that has a tendency to mess up some people.
		SWR is a term used to measure the amount or ratio of RF Power that IS being radiated by your antenna to RF Power that is NOT being radiated and reflected back into your feedline/transmitter.
		Now, in the chapter on antennas we discussed how to "cut" a dipole for the 40 meter pirate band, However, depending on the antennas proximity to other structures and height from ground, the math used to determine the length of the antenna is only a close approximation.
	www.textfiles.com /hamradio/swr.9x (946 words)

	Wilson Antenna Tech support - Page 8 - General SWR Notes
		If the whip is fully lowered into mast and the SWR is still high, remove the whip from mast.
		This is known as a "second harmonic" (2X the fundamental frequency of 28 MHz, transmitting at 56 MHz).
		However, the loss with a 1.5:1 (using 18' of coax) is actually less than 1/2 of 1% of your output power, which on a normal 5 watt radio means a loss of.025 watts of power.
	www.wilsonantenna.com /swrg.htm (900 words)

	SWR Facts
		For instance a SWR too high (over 3:1) all over the band can be an indication of a bad part or junction, poor ground or poor location.
		Unless a remote SWR meter head is incorporated, we usually use the standard SWR meter located at the radio.
		Your SWR will remain the same as far as the antenna is concerned and you may reduce the overall length of your coax enough to add more efficiency to the overall system.
	radioproshop.com /swr.htm (3200 words)

	Setting SWR
		I am not suggesting that everyone do this but a couple of bucks once a year is much better than a high repair bill on my radio and amps.
		Assuming that most people will use the built in radio meters to set and monitor their swr, and most people will also transmit on the 40 channel CB band, I will use this as my example.
		While setting the swr, it is very important that you DO NOT speak into the keyed mic.
	members.tripod.com /xbones_antennas/id36.html (679 words)

	swr's - HomeBrew Forum at eHam.net
		Second, I assume you're using the type of SWR meter that you have to switch to FWD or CAL, key the transmitter, adjust a knob for a full-scale reading and then switch to REF or SWR - some markings like that.
		SWR is (or can be) a ratio of many things - forward power to reflected power, feedline impedance to antenna impedance, etc. It doesn't change when you change power levels.
		SWR indications on your meter are relative to
	www.eham.net /forums/HomeBrew/2956 (1234 words)

	SWR® - Amplify Your Future™
		Further, SWR Sound Corporation shall be free to use any ideas, concepts, know-how or techniques contained in such information for any purpose whatsoever, including but not limited to developing, manufacturing and marketing products incorporating such ideas, concepts, know-how or techniques.
		SWR Sound Corporation reserves the right without prior notice to discontinue models, parts and accessories, and other items or change specifications at any time without incurring any obligations to any party.
		SWR Sound Corporation cannot predict or control when such downtime may occur and cannot control the duration of such downtime.
	www.swrsound.com /company/terms.php (976 words)

	Wideband Standing Wave Ratio (SWR) meter
		This will be an SWR of 2:1, because the antenna will be taking 2 A for each 50V applied to it, twice as much as the cable likes.
		You can get SWR meters in a wide variety of sizes, shapes, power ratings, frequency ranges, in analog and in digital versions, with a single meter, with two meters and with a crossed-needles meter.
		The infinite mark goes at the same level where the set point of the forward power meter is. 3:1 SWR is at 1/2 of that, 2:1 SWR at 1/3, while 1.5:1 SWR goes at 1/5 of the scale.
	www.hills2.u-net.com /html/radio/myswr.htm (2810 words)

	MGI_3.51 - Inbred Strains: SWR
		Gocze P. M., Beamer W. G., De Jong F. H., and Freeman D. (1997) Hormone synthesis and responsiveness of spontaneous granulosa cell tumors in (SWR x SWXJ-9) F1 mice.
		Green M. ar C. A., and Maren T. (1973) Strain differences in susceptibility to the teratogenic effect of acetazolamide in mice.
		J., Gounon P., Condamine H., and Jacob F. (1989) Pattern of expression of ecotropic murine leukemia virus in gonads of inoculated SWR/J mice.
	www.informatics.jax.org /external/festing/mouse/docs/SWR.shtml (2053 words)

	#!^{/!%! SWR - elmers Forum at eHam.net
		So the indicated SWR was somewhat different at the two operating positions.
		While the actual SWR does not change anywhere on a transmission line, the apparent and indicated SWR changes from point to point on a transmission line.
		The only SWR gauge that should be trusted is the Bird Wattmeter,if it's close accuracy your are striving for without resorting to a Hewlett-Packard Reflectometer for $ 25,000 dollar accuracy.
	www.eham.net /forums/elmers/52677 (630 words)

	How Do I check my SWR
		You can use the meter that is in the radio if you have a SWR feature or you can use an external SWR meter.
		Slowly adjust the Variable "SWR Cal" knob until the needle is on the "CAL" mark on the meter
		Slowly adjust the Variable "SWR Cal" knob until the needle is on the "Set" or "CAL" mark on the meter towards the end of the scale.
	www.eriecb.com /SWR.htm (684 words)

	Issue #4 - SWR Module & Simple Antenna Analyzer
		We’re going to start by building a basic absorptive SWR bridge that will be driven by the computer-controlled frequency source presented last time (i.e., the DDS) and whose output will in turn drive an antenna system.
		This level of precision is entirely adequate for determining even the low-end knee of the diode detectors primarily because of the compensation diode placed in the second op amp circuit for each signal path.
		Each frequency sample’s computed SWR is stored in a list in RAM memory for processing at the conclusion of the scan.
	www.njqrp.org /digitalhomebrewing/breadboard/issue4-SWR.html (1768 words)

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