Re: Topband: Bi-Directional Beverage Question - DXE Polarity
On Fri, Aug 12, 2011 at 9:38 AM, ZR z...@jeremy.mv.com wrote: Can you phase 2 wire reversible Beverages such as the offset close spaced type? For the part of the question before the such as. Yes, you certainly can phase two reversibles, but you won't be able to do it unless you can insure that a top and bottom, or + and - , or brand and no brand wire are used the SAME or electrically verified on both beverages. From a commercial product standpoint and writing KISS instructions, knowing that a customer may buy two of them and phase them, without notifying the installation manual writer or the manufacturer, I would certainly write the instructions with a plus and minus in them, and that as straightforward and simple as possible, so that if the same instructions are used for both, then phasing occurs without any outcome other than what the length of feedlines, combiners and physical placement would dictate. Make sure that RTFM works. Not to do so will cost profits, both in irritated customers who say your stuff isn't worth sh*t, regardless that it's their fault, and paying someone overtime to deal with MORE customers over the phone who can't get it right. That explains W8JI's text, to me at any rate. To the second half of your sentence Whether reversibles perform WELL in any phasing situation you can conjure up, just depends on the dang details and the ugly modeling math that no one (including me) wants to do on a given day. 73, Guy ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question - DXE Polarity
From DX Engineering's manual for the RBS-1P Reversible Beverage System manual: The antenna ladder-line is connected between the feed point and reflection units observing the polarity between the units. The + side of the ladder line on the feed point unit should be connected to the + side of the reflection unit. Since you may be twisting the ladder line along its length, correct polarity should be verified using a meter. An incorrect connection will result in poor front-to-back ratio or sensitivity. It is my understanding that W8JI designed the RBS-1P. It would be interesting to hear his comments on this paragraph. 73, Ken - K4XL On Thu, Aug 11, 2011 at 12:43 PM, Bob Eldridge eldri...@direct.ca wrote: 1. It could be a convenient accident. 2. If on purpose, the answer is probably Just in case this is useful. But then you would expect DXE to draw attention to it . 3. Useful that this has been discovered and brought to our attention. Bob VE7BS So other than phasing two Beverages, has anyone found a reason why DX Engineering does this? ___ UR RST IS ... ... ..9 QSB QSB - hw? BK -- Ken - K4XL BoatAnchor Manual Archive BAMA - http://bama.edebris.com ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question - DXE Polarity
1. It could be a convenient accident. 2. If on purpose, the answer is probably Just in case this is useful. But then you would expect DXE to draw attention to it . 3. Useful that this has been discovered and brought to our attention. Bob VE7BS So other than phasing two Beverages, has anyone found a reason why DX Engineering does this? ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question
On Tue, Aug 09, 2011 at 02:34:19PM -0500, Phil Clements wrote: Sure enough, the DX Engineering brand has the labels off-set to one side, so that it can be plainly seen which side is which! My beverage ladder lines also have a readable label. My convention is: Reading it right-side up, the bottom of the letters are (-) and the top of the letters are (+). 73, Kirk K4RO ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question
So other than phasing two Beverages, has anyone found a reason why DX Engineering does this? 73, Mike http://www.w0btu.com/Beverage_antennas.html On Tue, Aug 9, 2011 at 3:18 PM, K4RO Kirk Pickering k...@k4ro.net wrote: On Tue, Aug 09, 2011 at 02:34:19PM -0500, Phil Clements wrote: Sure enough, the DX Engineering brand has the labels off-set to one side, so that it can be plainly seen which side is which! My beverage ladder lines also have a readable label. My convention is: Reading it right-side up, the bottom of the letters are (-) and the top of the letters are (+). 73, Kirk K4RO ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question
Many thanks to all of you that told me to look at the labeling on the ladder line. Sure enough, the DX Engineering brand has the labels off-set to one side, so that it can be plainly seen which side is which! (((73))) Phil, K5PC Subject: RE: Topband: Bi-Directional Beverage Question Hi Phil, I have 2 Bi-directionnal DxEngineering Beverage, one day I have found one broken by a tractor. Luckily the manufacturer wrote his name and the model still on the same side of the ladder line, it allowed me to easily repair. 73's Daniel, F1UVN. http://www.f1uvn.com www.f1uvn.com Topband: Bi-Directional Beverage Question from [ http://lists.contesting.com/archives/cgi-bin/namazu.cgi?query=%2Bfrom%3Aphi lclements%40centurylink.netidxname=Topbandsort=date%3Alate Phil Clements] [Permanent http://lists.contesting.com/archives/cgi-bin/mesg.cgi?a=Topbandi=00bd01cc4 fb9%247205ab60%2456110220%24%40centurylink.net Link][Original http://lists.contesting.com/archives/cgi-bin/extract-mesg.cgi?a=Topbandm=2 011-08i=00bd01cc4fb9%247205ab60%2456110220%24%40centurylink.net ] To: topband@contesting.com mailto:topband%40contesting.com Subject: Topband: Bi-Directional Beverage Question From: Phil Clements philcleme...@centurylink.net mailto:philclements%40centurylink.net Date: Sun, 31 Jul 2011 14:38:35 -0500 List-post: topband@contesting.com mailto:%3ca%20href= mailto:topband@contesting.com mailto:topband%40contesting.com I have four bi-directional Beverages from DX Engineering. They tell you that when installing, make sure the ladder line side connected to the + terminal on one end is connected to the + terminal on the other end. They do not furnish a schematic, so I have been installing a battery on one end of the ladder line and reading volts on the other. I then mark the + side with red tape. The rub comes in when weather or an animal breaks the ladder line somewhere between the ends, and a repair is made. The brush and trees make it difficult to take a trip 720 feet down to the far end to place the battery, and then 720 feet back to the near end to read the results, then back to the far end to remove the battery and re-connect the line. It would be so nice and time saving to be able to take readings at one end and see if the polarity is correct without all the leg-work? Any ideas out there? Does it really matter about the polarity? Thanks in advance for any advice. (((73))) Phil, K5PC ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Bi-Directional Beverage Question
Phil, I built my own bidirectional, two-wire beverages (probably very like the DXE units) and, in my opinion polarity only matters if you are phasing two beverages. 73, geo - n4ua On Sun, Jul 31, 2011 at 3:38 PM, Phil Clements philcleme...@centurylink.net wrote: I have four bi-directional Beverages from DX Engineering. They tell you that when installing, make sure the ladder line side connected to the + terminal on one end is connected to the + terminal on the other end. They do not furnish a schematic, so I have been installing a battery on one end of the ladder line and reading volts on the other. I then mark the + side with red tape. The rub comes in when weather or an animal breaks the ladder line somewhere between the ends, and a repair is made. The brush and trees make it difficult to take a trip 720 feet down to the far end to place the battery, and then 720 feet back to the near end to read the results, then back to the far end to remove the battery and re-connect the line. It would be so nice and time saving to be able to take readings at one end and see if the polarity is correct without all the leg-work? Any ideas out there? Does it really matter about the polarity? Thanks in advance for any advice. (((73))) Phil, K5PC ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
