Just thought I would put this out to the reflector before making a purchase. I have priced a 22 foot long 2 inch dia. 4130 Chrome Moly mast from DXE ( DXE-ST200CM-22 ) at $510 delivered to my home QT
Author: Andre VanWyk via TowerTalk <towertalk@contesting.com>
Date: Wed, 6 Apr 2016 20:47:30 -0500
Fred, If that includes shipping, it is a great deal. It cost me way more than that to get one from down South a few years back up to MN. 73 NJ0F Sent from my iPhone __________________________________
Fred, We have a regional supplier here in the Southwest called Industrial Metal Supply. I've bought from them several times in the past. https://www.industrialmetalsupply.com/Products/chromoly-4130-d
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 6 Apr 2016 23:52:46 -0400
Are you sure the load justifies the need for Chrome Moly tube? Few loads do. If cost is no object, efficient use of funds should be. There alternatives with somewhat less strength, but still substant
If you really need that much strength, consider a 3" 1026 DOM mast. Your tower is not made of chrome moly why does your mast need to be? I cannot imagine why 2" is the standard. Do you really want to
If you really need that much strength, consider a 3" 1026 DOM mast. Your tower is not made of chrome moly why does your mast need to be? I cannot imagine why 2" is the standard. Do you really want to
My suggestion was to consider a 3" x 1/4 wall 1026 instead of a 2" Chrome Moly mast. I suspect that 3" 1026 is stronger than 2" 4130 (I don't have a mast calculator handy) and it is easier to climb.
First of all many thanks to all who responded here on the reflector and also in private. Several options were offered. Jim VE7RF has it right on for what happened here at this QTH. Besides being hit
My suggestion was to consider a 3" x 1/4 wall 1026 instead of a 2" Chrome Moly mast. I suspect that 3" 1026 is stronger than 2" 4130 (I don't have a mast calculator handy) and it is easier to climb.
First of all many thanks to all who responded here on the reflector and also in private. Several options were offered. Jim VE7RF has it right on for what happened here at this QTH. Besides being hit
First of all many thanks to all who responded here on the reflector and also in private. Several options were offered. esp the franchised metal super marts etc. The yield strength varies a bit. I hav
Array Solutions plus did not want their odd 2 7/8 size. At that time DX John KK9A 2 7/8 inch isn't an odd size, it is simply the OD of any pipe of "2 1/2 inch" iron pipe size. Could still be structu
I called 2.875 an odd size only because my rotator and antenna saddle clamps are designed for 3.000 inch tubing. I concur with the stiffness comment. Also a large tube has a larger circumference for
esp the franchised metal super marts etc. The yield strength varies a bit. I have seen as low as 75 ksi..and as high as 87 ksi . Others have seen an even wider variation in extremes. Some of the galv
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Fri, 8 Apr 2016 19:05:59 -0400
I've put a link upmany times to the system I had. The mast was 2" structural steel. I don't know the specs, but I knew at the time I had it substantially overloaded. It was an experiment. There was t
any wall thickness, and any yield strength . Then insert the yagis at any point above the top of the tower, windload on each..and it spits out the survival speed in mph. I have seen reference to thi
Author: Mike via TowerTalk <towertalk@contesting.com>
Date: Fri, 8 Apr 2016 20:03:38 -0400
Huh?...Really? The set up on that would be a bear!.. A plasma cutter and a bit of layout you'd be done before you could set the mill head....just sayin'. 73 Mike W2GR -- In a message dated 4/8/2016 7
For years I used the online WD9P calculator but it has disappeared. When VE7RF mentioned the ARRL calculator today I did a quick search and found this post http://lists.contesting.com/archives//html/
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sat, 9 Apr 2016 19:03:21 -0400
I have both a Plasma torch and a Bridgeport mill. The plasma torch is hand held and cuts great, but hand held (even using a guide) is no where near as nice as the Bridegport. A rough set up is all th
Author: Mike via TowerTalk <towertalk@contesting.com>
Date: Sat, 9 Apr 2016 19:55:21 -0400
I guess I am not clear then what you are trying to do then?.. Trying to enlarge the hole in the top plate of a tower?...If you are leaving the top plate intact on the tower...all the set up and braci