Yes, thanks. I was corrected earlier off-list. My memory from science fair days with a Tesla coil (mid 50's) where I learned this, is failing. :) Keith "another OF" Depending on barometric pressure,
way this list is operated, there are other tower reflectors. I would like to try another, if the default is to list. Can you refer me? Thanks. Keith ... because the lists at contesting.com are not d
I am admin for three lists. I did the democracy thing and asked the posters how they wanted the list set up. They voted and I followed their advice. Simple. Keith I'm familiar with the MAILMAN softwa
Well said. Time to close this thread and get back to towers. 8^) Keith It sure seems to me that everyone who wants to reply to the list has figured out how to do it. And undoubtedly many replies have
Very well said. There is an excellent discussion of grounding fundamentals in the ARRL Antenna Book. In the 17th edition (1994), pages 1-10 through 1-16 cover the section titled "Lightning and EMO Pr
Assuming the 8 foot dimension is depth, that hole will require a fairly large backhoe. A good operator should be able to make the hole within a few inches of your specification. But you should measur
I have not seen any specs posted about the Rohn TB-3 or TB-4. I use the TB-3 (for 2 inch mast) and these "set screws" are actually bolts. I recall they are 9/16 or larger. The bearing appears to have
Yesterday the XYL called my office to say lightning had struck the tower (again!). She did not see the strike but guessed it hit the tower. Upon arrival at home I found many problems: 1. Computer LAN
Tower is 150 feet, Rohn 45 equivalent, guyed with Phillystran. Three ground rods at base, each tied to two legs with one inch copper braid. Bulkhead is at window loaded with Polyphasers for all coax
I bought the WB0W gin pole. The tubing is indeed 1/4 inch thick, and it is 6061 aluminum. The only negative to ordering with the other WB0W parts is the shipping cost. I paid the shipping because I c
Interesting info. Thanks for posting. You are the 4th or 5th person to correct me. :) In the old daze in the USAF I worked on the F106. It had a radar system that used pressurized waveguides and dome
Thanks to many who responded to my original post about the strike that hit my QTH July 22. Jim K5LAD was especially helpful in diagnosing the monitor problem as temporary; just had to unplug for seve
I have one of these but never installed. Never heard of any proof that they work as advertised, to lessen the risk of a strike. Decided it likely could not be proven anyway. Keith --Original Message-
Interesting viewpoint. Do you sell these devices? Sounds like the same argument used by some who buy lottery tickets: "If you don't buy a ticket, you can't win the lottery." Statistically, there is a
I think going underground is a smart move for two reasons. First, it eliminates an overhead run which can be annoying at times when handling large items at the base of the tower. Second, there is les
I have heard and read about grounding the coax to the tower at both ends of the cable. However, there is apparently a way for huge amounts of voltage to get past this ground point and make its way to
There is little doubt that porcupines will help bleed off static charges better than nothing at all. However, a lightning strike has little to do with static charge bleed off. Instead, a strike is th
Don, What is your experience of lightning strikes on this parcel before the towers were erected? Keith Well, it seems to happen here. I have over a dozen towers, mostly in the 150 foot range, spread
It's not advice. It's a statement of fact. Keith above. Before jumping on this last bit of advice, people would be well advised to search the Towertalk archive for "connector" and "loss", because the
Correct. But that doesn't mean it's technically justified. 73, Pete N4ZR The World HF Contest Station Database was updated on June 5, 2004 2728 contest stations at www.pvrc.org/WCSD/WCSDsearch.htm __