tag:blogger.com,1999:blog-953397841255562532.post253870100185838592..comments2023-09-30T14:59:05.385+01:00Comments on G4ILO's Blog: Back to the drawing boardAnonymoushttp://www.blogger.com/profile/11984840704237681015noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-953397841255562532.post-56294073298733708612011-02-28T08:54:55.464+00:002011-02-28T08:54:55.464+00:00Julian,
Composite poles are much stronger than th...Julian,<br /><br />Composite poles are much stronger than the pvc sections and joints which are fairly feeble. I bought a set of carbon fibre fishing poles for a cobbwebb on ebay (spratreader was the trader) <br /><br />either glass or carbon fibre poles will be available in pretty much any size with as 'proper' parallel tube and tapered tubes which will lock together by friction similar to fishing poles are also available.<br /><br />Other methods like those fold out and nearly take your eye out tent poles might also work but could mean that there needs to be a bit of thought over where the element sits.<br /><br />I used an MFD last friday and was a bit concerned as it bent quite badly in the wind. I half expected the sections to break but it ended up just falling over.<br /><br />AlexAlex Hillhttps://www.blogger.com/profile/09985363196485318644noreply@blogger.comtag:blogger.com,1999:blog-953397841255562532.post-61259697862089670672011-02-28T03:37:30.179+00:002011-02-28T03:37:30.179+00:00Julian,
I've seen images of old Soviet Union ...Julian,<br /><br />I've seen images of old Soviet Union radio equipment that used what I thought was a clever system for their antennas. Cylinderical bead are threaded onto the wires and at the base a small "clamp" that snapped rigid putting pressure on the beads, thus making a stiffened antenna. Unsnaping the clamp released the pressure and the antenna became limp and could be rolled up and stored. I never could find a clamp like the one I saw, but I assume if you had two pieces of threaded plastic pipe, you could put pressure on the beads by unscrewing the two pieces and makeing the the overall length longer, and then screw them together to shorten the pipes to release pressure. Just a thought.<br /><br />73,<br />Sam<br />KC0KSVSam Tyreehttps://www.blogger.com/profile/12420905973548990266noreply@blogger.comtag:blogger.com,1999:blog-953397841255562532.post-71830013028317165832011-02-27T21:24:02.609+00:002011-02-27T21:24:02.609+00:00Good afternoon Julian, the picture is great it des...Good afternoon Julian, the picture is great it describes the the cool and windy weather. To bad the UPVC joint let go....I guess Murphy somehow had to get in the picture.VE9KK https://www.blogger.com/profile/04720839744779758420noreply@blogger.comtag:blogger.com,1999:blog-953397841255562532.post-66625864795842011432011-02-27T20:47:56.962+00:002011-02-27T20:47:56.962+00:00Hi Charlie.
Thanks for your comments. I do not ha...Hi Charlie.<br /><br />Thanks for your comments. I do not have a metal frame rucksack. It's just a small lightweight backpack. I don't see how I could use metal jointing pieces for a tube that houses an antenna. If you are suggesting making a copper pipe J-Pole that breaks down to 50cm lengths, I guess that might be worth trying but it is beyond my skills or equipment to work with copper pipe.Anonymoushttps://www.blogger.com/profile/11984840704237681015noreply@blogger.comtag:blogger.com,1999:blog-953397841255562532.post-74126678122708356432011-02-27T17:55:39.232+00:002011-02-27T17:55:39.232+00:00what you can do julian is something that I did whe...what you can do julian is something that I did when i was doing sota.<br /><br />assuming you have a netal frame in your rucksack, take you 50 cm pieces and do it how you did it before, but instead of using the plastic joiners, use copper pipe pieces.<br /><br />that worked for me for the same thing.<br /><br />the other thing you can do is to build a copper pipe jpole which there are plenty of plans for on the net.<br /><br />have fun...<br /><br />charlie<br />ai4ri/2e0gomUnknownhttps://www.blogger.com/profile/05543586320582984699noreply@blogger.com