Let's see if I understand correctly: You're getting down in a 4 foot square hole... that's 7 feet deep, 15" over your head... in dirt soft enough to dig by hand in 4 hours, and you're going to underc
The 3 element SteppIR has only a 16 foot boom, yet has achieved a strong following of users who think it's the best thing since the yagi was invented. I can't do the math, but it would seem that tune
Tim... over here, we mostly call them "lag bolts" or "lag screws". An arborist friend told me use of lag bolts is, as you point out, much kinder to the tree. The tree heals right around them with no
Ted... thanks for the comments, especially about going all the way through the trunk with the anchor bolts (I think that's what you said). According to my friend the arborist, the tree will heal righ
Do I understand correctly....that the thrust bearing (a) takes the weight off the rotor, and (b) allows removal of the rotor while leaving the mast and antennas in place? Any other purpose(s)? I have
My thrust bearing has only two setscrews... at 90 deg to each other. That's what led me to think that the thrust bearing is a weight-carrying device, to take vertical load off the rotator. Many have
My ground system presently uses clamps, but I want to improve it. After checking the erico and harger websites, I'm not clear on what I need to weld my ground wire to the ground rods. I have several
What is the best way to attach ground wires to aluminum tower legs? Would a brass ground-rod-type clamp be good? Or a copper lug under one of the leg bolts? Jerry K3BZ _______________________________
Can anyone direct me to magazine or book articles, or other sources of plans for building a basic Single-Point-Ground panel box for mounting outside at my point-of-entry? Jerry K3BZ _________________
For the first time, I didn't get many replies to an inquiry on TowerTalk. Being a ham-with-no-design-talents, I was looking for a construction article or some DIY plans for a Single Point Ground "box
Dan... you are not alone... earlier this summer I had nearly the identical situation happen here. The hole turned out much bigger, the concrete truck sank in soft clay AND got stuck between two trees
I checked on the cost of a pumper...I was quoted a minimum of $600 here in eastern PA... and that was too much for me. I am SO glad that I then asked the concrete supplier to send someone to inspect
After much reading here on TowerTalk, my conclusions were that forms have to be removed after the pour and then the space has to be backfilled... with compression every foot or so. That would be more
There are 27 cu ft in 1 cu yd (3 ft x 3 ft x 3 ft)...so 2.5 ft x 2.5 ft x 5.0 ft = 31.25 cu ft... divided by 27 cu ft = 1.157 cu yd. Jerry K3BZ -- Original Message -- From: Jim Rhodes To: gdaught6@st
You may be right for a cylinder....but he said 2.5 x 2.5 x 5.... that's not a cylinder. Still, the calcs (1.157 vs 1.25) are not that much different. :-) Jerry K3BZ -- Original Message -- From: FireB
Yeah, well... no worries...maybe this thread has just about exhausted itself anyway :-) Jerry K3BZ -- Original Message -- From: FireBrick To: Jerry Keller ; gdaught6@stanford.edu ; towertalk@contesti
If you want to see the most creative use of one of those grinders, check out www.grindergirl.com or watch the Letterman show on Thurs or Fri nites. Jerry K3BZ -- Original Message -- From: Jim White,
OK, maybe my ignorance is showing, but does anyone else think it a bit preposterous for an engineer to recommend digging a 25 foot deep hole for a tower base? If the soil content would allow augering
K1TTT: "....where is this that you can drill that deep and not hit ground water??" Not to mention magma..... I would hate to do the rebar for it. A 25' long rebar cage that has to be positioned in th
My conclusion that my backhoe operator used too big a bucket was HIS explanation for why the hole came out too big. He expected pretty much what he found under the surface here, but he said (in hinds