Got a Tri-Ex W-51. Used obviously. Apparently the owner had gotten a new base from Tri-Ex to go with it, but never used it. Good for me. Nice deal. Tri-Ex directions (had a copy) said "be sure to che
The RFU-503 is a waterproof pl-259 replacement silicon rubber o-rings/seals Seems like that could be the simplest. picture at the manufacturer (rf industries) http://rfsearch.rfindustries.com/ShowPro
interesting Martin. Good feedback. Surprisingly, I've found *no* references to hams using these. (on the web) I noticed the rf in industries engineering drawing at http://rfsearch.rfindustries.com/dr
Some thoughts at the end about what I'd do different. I know this is all negated by the US Towers approach, but this might be interesting for people re-using old towers. Just poured 8 3/4 yds this we
searching the web, the guys putting up wind turbines have done some seriously big tiltups. They tiltup 100' 6" tubular poles with a wind turbine on top. (with a lot of care and detail to how to do it
I'm probably going to embarass myself because I can't do a little statics analysis but here goes: (I may be wrong, so caveat emptor. Please correct me if so) I built a raising fixture with pipe, pull
after my last post about falling derricks what kind of big tiltups others (wind turbines, wind speed) do, I looked some more. these guys talk about a 341 ft tiltup. Really! Some good data in there. (
I threw together a quick summary of my HG-70HD refurbish and reinstall (70' crankup). http://home.comcast.net/~knormoyle/photo_gallery.htm Left out some details, but heck feel compelled to document s
I did some random looking around, because I was curious. The "list of masts" entry is nice in wikipedia. Has all the big guyed masts in the US and elsewhere ...When you have >2000' towers, all the li
in an old post, http://lists.contesting.com/archives//html/Towertalk/2005-06/msg00238.html I calculated the forces when raising a crankup with a ginpole at various heights. (there are three links the
flexible. /Surprised it was bare. Probably used as ground wire for car audio installations? Maybe what's known as "rope-stranded bare copper" (google) would do. Typically jacketed though? By example
This is a new g-1000dxa. I remember playing with the preset a couple weeks ago before I put the antenna up, and thought it was working fine. Antenna is up now. Left/right works fine for low and high
I know nothing about structural engineering. But I can google. prior towertalk: http://lists.contesting.com/archives/html/Towertalk/2003-05/msg00236.html http://lists.contesting.com/archives//html/To
< I'm interested in this because I'm getting a used tx-455, with some 3rd party anchor bolts and it's got me wondering if they're the right ones> did some more searching. The whole analysis of streng
sorry for another post, but here's a real interesting doc focusing on fatigue (in traffic sign anchor supports), from the National Cooperative Highway Research Program...univ. research report. They h
I have some yaesu g-800 and g-1000 rotators. I was noticing someone commented the lower mast clamps seems to have the same hole spacing as the top, so the lower mast clamps Yaesu sells can be used as
Okay, I got my answer. From myself! I think this is a pretty nice solution to anyone having clamp problems with Yaesu G-800/1000's, for about $50 cost, so I wanted to share it. (see my prior post whe
apologies for another post, but in case anyone tries this, I have to correct my prior post. Sorry for being anal here about something of narrow interest. I realized I had a brain fart after I posted.
This is not re-opening the "thrust bearing vs rotor supporting the weight" thread. Questions are slightly different. I have two crankups with 7 1/4" bolt to bolt holes for thrust bearing, so ponderin
<this relates mostly to use of flange bearings like us towers distributes> There has been mention of use of fernco adapters as weather shields on thrust bearings. I try to add some specifity here. I'