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Total 6 documents matching your query.

1. [TowerTalk] 40m BEAM BOOM (score: 1): Author: "WA3GIN" <wa3gin@comcast.net>; Date: Sat, 25 Apr 2009 17:39:15 -0400; Hi folks, This year we got the garden done early and I'm having time to work on the 3 ele 40m beam project. Today I assembled a boom that is about 47ft long. The boom material is .250" wall 3" OD. Th; /archives//html/Towertalk/2009-04/msg00721.html (7,398 bytes)
2. Re: [TowerTalk] 40m BEAM BOOM (score: 1): Author: <donovanf@starpower.net>; Date: Sat, 25 Apr 2009 18:04:51 -0400 (EDT); Dave, Why wouldn't you use the entire 47 foot boom? Guy attachments five feet from each end of the boom will work well with your heavy 0.25 inch wall boom. It sounds like you're planning on full size; /archives//html/Towertalk/2009-04/msg00722.html (9,854 bytes)
3. Re: [TowerTalk] 40m BEAM BOOM (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Sat, 25 Apr 2009 15:27:35 -0700 (PDT); Actually, irrigation tubing is at least 0.050 inch and heavier grades are available. I have made 30 foot unguyed verticals out of it that survived very high winds (>70 MPH). I'm think your Yagi plan; /archives//html/Towertalk/2009-04/msg00723.html (7,857 bytes)
4. Re: [TowerTalk] 40m BEAM BOOM (score: 1): Author: "WA3GIN" <wa3gin@comcast.net>; Date: Sat, 25 Apr 2009 19:14:26 -0400; Thanks but I've had the dipole element up for over 5 years in King George County...have had 31 trees blow over but the antenna is just fine so far. What about the boom question. Truss connection...al; /archives//html/Towertalk/2009-04/msg00724.html (9,256 bytes)
5. Re: [TowerTalk] 40m BEAM BOOM (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Sat, 25 Apr 2009 17:16:05 -0700 (PDT); Nice data point on the irrigation tubing. I think I'll keep making antennas out of it :-) We had a bunch of trees blow down here 2 years ago ("50 year storm") and nothing happened to my various irrig; /archives//html/Towertalk/2009-04/msg00725.html (9,054 bytes)
6. Re: [TowerTalk] 40m BEAM BOOM (score: 1): Author: Don Moman VE6JY <ve6jy.1@gmail.com>; Date: Sun, 26 Apr 2009 00:33:50 +0000; If the boom was a uniform cross section (it is) and had no other weight loading (it does), I would truss it at the 2/3 point from the center. This leaves all unsupported sections an equal length. Sin; /archives//html/Towertalk/2009-04/msg00726.html (10,250 bytes)

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