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#21
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Yep, longer is better, but perhaps not as portable - I'm just tryin' to
get these glider crews decent communications as cellphone coverage is relatively poor beyond Marfa Airport, and there are very few airports around. So a crew at Marfa should be close by when the pilot gets low and needs to know where the wires / fences / gates are located. Good crew underneath a pilot out here can save a glider! My Dad (Fritz Compton W4LJH) had very long wire ham antennas (extended zep, etc.) on our gliderport near Miami. He hated coax especially in the Florida humidity so he and I made "open wire feeders" like he did as a kid in the 1920's. He also wound his own antenna tuners - would check power by tuning for the strongest spark off the coils with a lead pencil! Classic. Dad was one of the first to use ham radio in his LK-10A sailplane at the 1946 Nationals in Elmira, NY and in 1947 at Wichita Falls, TX.. He would transmit one-way to my Mother on the road. He painted his contest number on top of the trailer so he knew it was her. More than once he told her to pass a slow truck on a long uphill grade - trucker thought she was crazy - but Dad had told her "all clear". Educating folks about crew car antenna tuning (by length) and seeking efficiency with good SWR is important. In the 1960's my Dad built homemade 1/4 wave VHF crew car antennas out of a wire and a flattened tin can that we would slam into the top of the car door. Simple, and we had close to 1 to 1 Standing Wave Ratio for 123.3. We had a simple three letter code so he could tell me where he was on course and his optimism about the sky ahead. It worked extremely well. So thanks for the advice. As my Dad would say, "Lots o' watts is OK, but good radio is mostly in the antenna." He is 90 years old - living in Texas - but his signal is fading. Burt Compton Marfa Gliders, west Texas www.flygliders.com |
#22
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PB wrote:
And perhaps you are conveniently forgetting the fact that Neville Chamberlain agreed to allow Hitler to occupy the 'Sudetenland' despite a previous treaty with Czechoslovakia, foolishly declaring that he just obtained 100 years of peace for Europe. Take it up with your priest, PB, or at least to a group where it's not OT. Got any opinion on sailplanes? Jack |
#23
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![]() Malcolm Austin wrote: The quality of the coax is also important. Amazing how much signal power you can lose over 10 feet of poor coax. Get the best you can afford. Cheers, Malcolm (also a poor K6CR owner) :-) Malcom and Burt, What brand or spec coax is the best quality? I have an AV-5 antenna with ground plane (as shown on Tim's page he http://www.wingsandwheels.com/page14.htm ) that I want to connect to my Icom portable (BNC both ends), so what should I look for in a fine piece of coax suitable for this installation? I have only a RadioShack SWR meter (that I use to tune my cb antenna) so what can I rig up to tune the AV-5 to the Icom/coax installation? I use a crimp on style coax connector, is there a better way to terminate the BNC connectors than crimp on? Thanks, Jim |
#24
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use good quality (NOT Radio Shack!) RG58C/U cable.....and use if at all
possible Crimp-on connectors....if you don't ahve the special tool for crimping connectors, try the local avionics shop.this is all they will use.....or use as next best, solder type connectors.stay away from twist on types. tim Wings & Wheels www.wingsandwheels.com "jphoenix" wrote in message ups.com... Malcolm Austin wrote: The quality of the coax is also important. Amazing how much signal power you can lose over 10 feet of poor coax. Get the best you can afford. Cheers, Malcolm (also a poor K6CR owner) :-) Malcom and Burt, What brand or spec coax is the best quality? I have an AV-5 antenna with ground plane (as shown on Tim's page he http://www.wingsandwheels.com/page14.htm ) that I want to connect to my Icom portable (BNC both ends), so what should I look for in a fine piece of coax suitable for this installation? I have only a RadioShack SWR meter (that I use to tune my cb antenna) so what can I rig up to tune the AV-5 to the Icom/coax installation? I use a crimp on style coax connector, is there a better way to terminate the BNC connectors than crimp on? Thanks, Jim |
#25
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"jphoenix" wrote in message
ups.com: Malcolm Austin wrote: The quality of the coax is also important. Amazing how much signal power you can lose over 10 feet of poor coax. Get the best you can afford. Cheers, Malcolm (also a poor K6CR owner) :-) Malcom and Burt, What brand or spec coax is the best quality? I have an AV-5 antenna with ground plane (as shown on Tim's page he http://www.wingsandwheels.com/page14.htm ) that I want to connect to my Icom portable (BNC both ends), so what should I look for in a fine piece of coax suitable for this installation? I have only a RadioShack SWR meter (that I use to tune my cb antenna) so what can I rig up to tune the AV-5 to the Icom/coax installation? Jim, the RadioShack SWR meter will work fine. It doesn't show to be useful in that range but mine works well. But, as Tim Mara says in another response, use a good quality coax and good quality crimp on BNC connectors. Take any screw on BNC connectors you find and throw them in the trash. better still, get a good torch and melt them down so no one else will try to use them later. Larry "01" USA |
#26
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Thanks fellas,
I do indeed use crimp style connectors and I have the tool - expensive - but so are all of my other tools! Rgds, Jim |
#27
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Hi Jim,
I see Tim and Zero 1 have answered your questions and I agree with their points. I would be a little unhappy with a CB style VSWR meter as they don't normally work too well at the higher frequencies. If your gliding club is like ours, you will find 2 or 3 Radio Ham's who could help you out with a meter for sure. ciao. Malcolm... "jphoenix" wrote in message ups.com... Thanks fellas, I do indeed use crimp style connectors and I have the tool - expensive - but so are all of my other tools! Rgds, Jim |
#28
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Jack wrote:
PB wrote: And perhaps you are conveniently forgetting the fact that Neville Chamberlain agreed to allow Hitler to occupy the 'Sudetenland' despite a previous treaty with Czechoslovakia, foolishly declaring that he just obtained 100 years of peace for Europe. Take it up with your priest, PB, or at least to a group where it's not OT. Got any opinion on sailplanes? Jack Well Jack, I do, however if you bothered to read his post, and the one before, you might have realised that I was only responding to his 'OT' post. And that iy is not the first time Derek introduced politics into this NG. Paul |
#29
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Well, I am a glider pilot, rather than a professional
politician. Unfortunately, as we are finding out the hard way in Europe as the EC 'harmonises' it's flying regulations, politics are important to us. Politicians and civil servants always want to play it safe, so airspace is becoming more and more reserved for commercial and military aviation and we are lucky to get any remaining scraps. The idea of airmindedness and flying for pleasure never seems to figure in politicians minds, until there is a war and they need pilots! Also wars require them to raise extra revenue, i.e. taxes, so we have less disposable income to spend on flying, assuming that we are allowed to aviate at all. Then there is the risk that we will be send into battle and killed, or have to kill many innocent civilians on the other side. I would only be prepared to go along with this if our country was actually directly under attack, rather than some trumped up charge of WMDs in a remote land, when the real objective was to nick all their oil! Oh, and by the way Paul. If Hitler's Germany was perceived to be such a threat to the World in 1938, why didn't the US get directly involved until 1942? Derek Copeland At 02:54 14 January 2006, Pb wrote: Jack wrote: PB wrote: And perhaps you are conveniently forgetting the fact that Neville Chamberlain agreed to allow Hitler to occupy the 'Sudetenland' despite a previous treaty with Czechoslovakia, foolishly declaring that he just obtained 100 years of peace for Europe. Take it up with your priest, PB, or at least to a group where it's not OT. Got any opinion on sailplanes? Jack Well Jack, I do, however if you bothered to read his post, and the one before, you might have realised that I was only responding to his 'OT' post. And that iy is not the first time Derek introduced politics into this NG. |
#30
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At 02:48 12 January 2006, Derek Copeland wrote:
By the way us British glider pilots are not made welcome in France, because allegedly two of our gliders were unfortunate enough to get in the way of a free falling parachutist and a French two-seater that spun in a thermal respectively. Since then they will not recognise our UK qualifications, despite this being a principle requirement of the EU. I don't think they have ever forgiven us and the Yanks for liberating their country from German occupation! There is a very simple explanation for all this, the're French!!! |
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