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
