I only have experience with the ZRC cold galvanizing compound. When I first read your post I thought what a good time to review my old chemistry and valence bonding etc. After looking up the valence
Don't feel bad David. There are lots of engineers that can't grasp the difference between common and differential mode currents. W8JI and K9YC both have pretty good explanations of it on their sites.
Yeah, matched was a bad choice of words. I wasn't speaking totally of impedance. Hooking up a balanced dipole to an unbalanced coaxial transmission line isn't really matched and begs the dividing of
Funny how this wasn't supposed to morph into a thread about finding true north. Unless you are dealing with pointing lasers its mostly going to be a question of horseshoes and hand grenades where clo
Hans, My experience with the Beverage is limited but that probably puts me ahead of about 99% of the ham population who have never built one. I built a set of NE/NW one wavelength Beverages for XA5T
Tom, Had a HDBX48 up at two qths. It requires a pretty big block of concrete, at least compared to guyed towers. Skip the mounting plates and fold over bases. Get the BXB stubs. I think they are BXB7
Coaxial cable here is bought in quantities of 500'. Scraps less than 100' get hauled off to the hamfest. Looking at price per foot of 3 popular types of 1/2" coax we have: LMR400 $1.18/ft or $589.99/
When I hijacked this thread it was my intention to just point out that you should make a loss/gain budget and determine where you could get the best bang for your buck. Let the numbers tell you wheth
Wow! There's a loaded question. It depends. What paths/take off angles do you want? How many radials for the verticals? What is the surrounding terrain like? How high is the yagi? Take all that into
Check out W8JI http://www.w8ji.com/windom_off_center_fed.htm Most of the OCF designs seem to be a compromise to get a multiband antenna with a single feed and no tuner. If you are going to go with OC
Run the calculations. This article might help: http://www.w9smc.com/BH/2007/k9cc%20article.pdf You will need this table to take your wind load to PSI. http://bristolite.com/interfaces/psi_wind.aspx S
Make sure it all fits. I could have gone with 3" moly masts but then my thrust bearings, rotors, boom to mast plates, etc would all have to be changed to accommodate the larger mast. Your installatio
Mine has been at 2 QTHs in the last almost 20 years and the ends haven't fallen out yet. Earl N8SS Message: 6 Date: Thu, 6 Aug 2015 10:30:43 -0400 From: George Dubovsky <n4ua.va@gmail.com> To: towert
Thought maybe you had a rotator with no brake installed but then saw that it was a U-Bolt failure that caused the slippage. You can pin the mast to the rotator if slippage is a problem but you should
For simple as possible, skip the remote switches. Run all the coaxes into the shack. Have a 4 to 6 way coax switch on each radio. Use 2 way switches to switch the more popular antennas between either
Two muffler clamps holding a threaded quick link to the mast and a come-a-long hooked to that has allowed me to jack up the 300+ lbs of antenna and mast. Have hooked from the bottom of the mast too b
Have been using a AI1H Coaxial Resonator Match dipole for years. It does exhibit the double bump in SWR and covers nearly the whole band with <2:1 VSWR. A little more difficult to build than a standa
Unfortunately, most utilities have A rfi guy. Singular. DF the issue yourself down to the pole and record the pole number and include that in your complaint. It's a lot easier to get a repair crew ou
I did this all myself, having done it before after thinking the whole process through. Used a double tram line on a mount set 4 feet apart and a carrier on the boom to hold the antenna level and atta
Not a ham application but I had to make a balun for work to test a wide band antenna design for EMC immunity testing. It covered 150 kHz to over 20 MHz at 15 kW. Sevick's book will help you a lot in