Lee, An excellent source for small or large quantities of aluminum or Chrome-Moly steel is Dillsburg Aeroplane Works in Dillsburg, PA. UPS picks up from their warehouse 6 days a week. They can ship a
Hi Glenn! I recommend phenolic rather than fiberglass tubing. It's extremely strong and has excellent moisture, dielectric strength, electircal resistance and UV resistance properties. Here's the sup
I highly recommend Dillsburg Aeroplane Works in Dillsburg, PA. They ship via UPS on the same day the order is received. Lengths up to 8 feet are UPS shippable. phone: 717-432-4589 73 Frank W3LPL ____
Peak phase error due to transmission line mismatch occurs with lines that are an odd number of 1/8th wavelengths long. The are no phasing errors due to mismatch when the lines are any multiple of 1/4
Hello Jose, I have plenty of guy attachment plates for AB-105, just let me know how many you need. You wiil have to fabricate rotor and bearing shelves. Hopefully you have plenty of 24 inch horizonta
Hi Dan, I'm sure you're enjoying the beers and stereo, I do too, but... did u realize that sod staples cost only $35 per 1000 at Southern States and many other landscaping suppliers? They're made of
A heads up to any ham interested in this AM tower... Although the website says "similar to Rohn 55," this tower is dissimilar in at least one very important aspect: it does not have diagonal bracing.
Bob, I believe its been mentioned on TT that a new standard, TIA- 222-G comes into effect on January 1, 2006. This new standard will be incorporated by reference into the International Building Code
Mark, I've used Garolite (a tradename for Type LE phenolic) on my antennas for 35 years and I've never had mechanical or electrical degradations of any kind. There are two types of Garolite rod: mach
Brian, You didn't mention the band your 4-square will cover or the height of your towers... However... proximity to your towers is likely to be more significant than the small terrain differences. I
Bill, In my experience, "one-way propagation" is primarily a result of large differences in the noise and interference environments on each end of a propagation path. This is a very common phenomenon
Bill, My QTH is very exposed to the wind, and my problem was with fiberglas and Parafil (similar to Phillystran) guys singing in the wind. The Parafil guy vibration could be heard hundreds of feet aw
Gedas, I found #14 THHN insulated wire at Home Depot for $16 per 500 ft spool. 73! Frank W3LPL _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towe
Here's a tower that can survive a heavy antenna load in a Cat 5 hurricane, located on Jan Mayen Island (JX). It's commonly known as "Heavy Duty AB-105," buts its proper designation is Trylon (now Pen
Marc, I have two Orion 2800 rotators that have operated very reliably for me for the past 7 years. One rotator is 120 meters from my ham shack and the other rotator is over 200 meters from my shack.
PLEASE PLEASE knock this off before you drive the rest of us away. Thanx Frank W3LPL _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wire
Mike, I use a 4-square vertical array on 160 meters. Until last month, I had two elevated radials per vertical. That system had large stacks of ferrite cores ("baluns") on each feedline at the base o
Hi Bill, I have a similar system, four 2-element quads, 50 meters high, at azimuths of 45, 150, 225 and 290 degrees. I also lengthen the reflectors by adding wire to move them down the CW band. At on
For those who missed this last month, copies of TIA-222-G can be purchased from TIA, but they are exceptionally expensive. However... there is a pdf presentation on the web that contains many of the
1.75 inch diameter x 0.188 inch wall Chrome Moly (extremely strong) aprox $10 per foot Dillsburg Aeroplane Works Dillsburg, PA 717-432-4589 73! Frank W3LPL -- Original message -- with .25 walls and a