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341. wind force design criteria (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 5 Aug 1996 14:36:36 -0700 (PDT); Steve: a number of times I've seen references ON A COUNTY basis to Since 70 mph is the minimum listed wind velocity for ANYWHERE in the US, how come crankup towers are always rated for 50 mph? I thin; /archives//html/Towertalk/1996-08/msg00054.html (9,210 bytes)
342. Rohn 25G with Ham-IV rotator (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 5 Aug 1996 14:35:53 -0700 (PDT); really a 25AG3. Later, you said you thought it was a 25AG. In fact, I am reading lots of confusing data on this relector about Rohn tops that does not agree with my Rohn book. For example, K7LXC say; /archives//html/Towertalk/1996-08/msg00055.html (11,483 bytes)
343. more on 25G/Ham IV (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 5 Aug 1996 14:36:20 -0700 (PDT); without the rotator mounting plate. section on which you mount a thrust bearing - no pipe at the top. Hi Bob, My experience has been that a Ham IV will not "free fall" inside a Rohn 25 tower. It hit; /archives//html/Towertalk/1996-08/msg00056.html (7,444 bytes)
344. wind force design criteria (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Wed, 7 Aug 1996 02:41:35 -0700 (PDT); Now these sound like reasonable ratings. Crankup manufacturers in the US should follow the UK example. Stan w7ni@teleport.com; /archives//html/Towertalk/1996-08/msg00069.html (7,862 bytes)
345. Torque-Controlling Guys (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 12 Aug 1996 12:30:55 -0700 (PDT); Hi Geoff, I think you are looking for a Rohn TA45 Torque Arm Stabilizer Assembly. These thing do a great job of stabilizing the tower against twisting. Rohn recommends them when you sidemount a dish; /archives//html/Towertalk/1996-08/msg00110.html (8,054 bytes)
346. Guy tension ?? (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 12 Aug 1996 12:33:14 -0700 (PDT); I have heard this advice several times but I am not sure how important it is either. When you say "tension all guys the same amount", you must be saying tension the set at 30 feet the same as the se; /archives//html/Towertalk/1996-08/msg00111.html (10,566 bytes)
347. wind force design criteria (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 12 Aug 1996 12:25:42 -0700 (PDT); Yes, but the POINT is (gee, do I REALLY have to state it?) that a free standing, extended crankup will come down at a MUCH LOWER wind speed than most people would think. An HONEST manufacturer would; /archives//html/Towertalk/1996-08/msg00112.html (7,939 bytes)
348. Tower Pricing (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Tue, 13 Aug 1996 11:11:40 -0700 (PDT); Yes, I sell Rohn tower, but the intent of this post is not a commercial. In fact, it is probably an anti-commercial. Last year when I considered taking on a Rohn dealership for the second time, I did; /archives//html/Towertalk/1996-08/msg00134.html (9,282 bytes)
349. Trylon / Titan Towers?? (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Wed, 14 Aug 1996 13:29:42 -0700 (PDT); Hi Scott, I noticed that when you divide the "lbs" by the "sq ft" you get about 13 at 70 mph and about 20 at 85 mph using the data in the above chart. An old EIA wind chart that I have in an old Roh; /archives//html/Towertalk/1996-08/msg00151.html (8,180 bytes)
350. Guy tension ?? (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Wed, 14 Aug 1996 13:29:02 -0700 (PDT); I know this: If you have 30 or 40 feet of unguyed tower standing there, either above a set of guys or just protruding out of the ground, you can move the top several inches off plumb in any directio; /archives//html/Towertalk/1996-08/msg00152.html (10,615 bytes)
351. crank up tower loads (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Wed, 14 Aug 1996 13:30:10 -0700 (PDT); I think you are missing something here, Nick. When you read the specs for loads that can be put on a tower, the load of the TOWER ITSELF is not mentioned, but it certainly is there. So when you see; /archives//html/Towertalk/1996-08/msg00153.html (8,896 bytes)
352. Everything you thought you knew about Rohn 45G wind loading is WRONG (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Wed, 14 Aug 1996 15:27:47 -0700 (PDT); My only comment is that you are right, I never noticed that before. Try this one: As you have noticed, there are TWO boxes with square foot numbers in them. One for ROUND member antennas like Yagis; /archives//html/Towertalk/1996-08/msg00154.html (9,549 bytes)
353. Rohn 25G with house bracket. (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Thu, 15 Aug 1996 15:49:02 -0700 (PDT); Hi Gene, Some of what I say you probably won't like. There are reasons, though, why there are no simple answers to your questions as you will see. This is a very common problem and I believe you have; /archives//html/Towertalk/1996-08/msg00157.html (9,184 bytes)
354. Tower wind loading (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Fri, 16 Aug 1996 01:37:03 -0700 (PDT); I can see it all now . . . "How far can I extend my crankup safely today? Let me just check my calibrated barometer . . ." Or in the year 2100 the topic will be "Crankups on the Moon" . . . or what; /archives//html/Towertalk/1996-08/msg00160.html (7,087 bytes)
355. Guy tension ?? (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Fri, 16 Aug 1996 01:36:40 -0700 (PDT); A very interesting topic, Ian, that we have discussed very little here. Yes indeed, towers do have dynamic characteristics and they seem to be almost totally ignored by us amateurs. I ignore them sim; /archives//html/Towertalk/1996-08/msg00161.html (8,504 bytes)
356. 100+ winds in Phoenix (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Fri, 16 Aug 1996 02:29:44 -0700 (PDT); What kind of mast material? Water pipe? Wow! This is a new one on me!! And yet another crankup bites the dust. All the guyed Rohn towers stayed up and all the crankups fell down! Imagine that! What; /archives//html/Towertalk/1996-08/msg00162.html (7,215 bytes)
357. Guy wires missing on 130' Rohn 45 (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Fri, 23 Aug 1996 03:20:09 -0700 (PDT); My opinion is that who ever is in charge of this tower is damn lucky it hasn't crashed on his head and killed somebody. You are perfectly correct in refusing to climb it. It would probably be a good; /archives//html/Towertalk/1996-08/msg00217.html (8,711 bytes)
358. Glenn Martin Hazer Use Query (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Tue, 27 Aug 1996 15:03:51 -0700 (PDT); Hi Dick, What am I missing here? If you guy the tower permenently at the top, how do you get the Hazer and the antenna mounted on it above the top set of guys? I has to be above the top set of guys t; /archives//html/Towertalk/1996-08/msg00254.html (8,166 bytes)
359. Hinged Tower Base (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Mon, 8 Jul 1996 16:22:19 -0700 (PDT); Hi Hank, Rohn does make a hinged base (BPH25G) but it is made to mount to a flat concrete pad. Not ideal for Field Day. Rohn also makes a "drive-in base" (SDB25G) That has a angle iron spike on the; /archives//html/Towertalk/1996-07/msg00069.html (8,488 bytes)
360. 3 versus 4 guys (score: 1): Author: w7ni@teleport.com (Stan Griffiths); Date: Fri, 14 Jun 1996 00:25:06 -0700 (PDT); Hi Guys, I think the answer is really much simpler than what I read above. If you guyed a tiltover tower in the normal three ways, the tilting boom that the cable attaches to would interfere with th; /archives//html/Towertalk/1996-06/msg00092.html (9,420 bytes)

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