I am sure you already did this, but check it with an SWR bridge and transmitter before making the climb. My MFJ259 (any small signal analyzer for that matter) has issues in the presence of strong RF.
I took a stab at this for grins. Using the classic Rohn 45 100' install with 1/4"EHS @ 91' and 3/16 EHS @ 31' & 61' and the anchors on an 80 foot radius. I assumed an 8' elevated anchor and in keepin
I confess, I am spoiled. I have access to a plethora of RF devices such as network and impedance analyzers so I wouldn't have to make do with making this measurement with a rigged up setup. BUT, if I
You can figure this out. The G-1000 specs 125' maximum runs of #20 wire. #20 is 1.015 ohms/100 ft. That leaves you with a max resistance budget of 1.26875 ohms for 125' of #20. If you use #18 with a
On the Diamond it's most likely a bad connection at or in the antenna. Or it has been damaged by a strike but not blown apart. I found the top 3' "exploded cigar" for my vhf/uhf antenna in the woods
I got 3 emails with pics after I posted this morning. Said they were from TT so I thought the site got hacked. Hot girls but I could tell they have never been to a hamfest as I was sure one of them s
Gary, I also have the Dunestar filters (multiband) and run them in my SO2R setup and they work well. They are pricey at $450+ for each radio. Probably overkill for your application but they also make
Jim, All of the items you mention are valid in affecting the power handling capability of the balun. You are going to have to ask the manufacturer how they rated their product as there are no set sta
If neither the motor or the indicator is working check your connection at pin 1. This is the common for the both of these circuits. It is also common for the brake but the brake is also connected to
The books that K1ZO mention are a great start. Looking at the Rohn specs for standard off the shelf configurations will give you an idea of what can be done. If your installation is atypical you migh
http://www.w4rp.com/ref/coax.html RG174 would even be usable on 160m, not great but useable. The beverages I built for XA5T were fed with a couple 100 feet of RG58. We only had to listen to the US so
All good suggestions so far. The gin pole is not meant for a lateral load so using a snatch block at the bottom of the tower and keeping all the forces on the gin pole in compression is a good idea.
-- Is it safe to operate the TX2 while it is laying on its side ? I don't find anything in the manual EXCEPT for this step in the CHECK OUT section: D. With the rotator sitting in the upright positio
It sure does depend on the building inspector. I have had inpectors that crawled all over the place, wanting the drawings, prints, engineer approvals and asking for information that they really didn'
If you really want to cut it I think everyone covered the hows of cutting it and lowering the parts. However, the easiest thing to do would be to move the rotor plate farther down the tower leaving o
That's my favorite way to secure a Rohn45. Especially when you move, you only leave the pier pin, guy anchors and concrete at the old QTH. The pin holds the base from sliding laterally and allows the
-- Message: 3 Date: Wed, 27 Aug 2014 12:54:45 -0400 (EDT) From: Hans Hammarquist via TowerTalk <towertalk@contesting.com> To: towertalk@contesting.com Subject: [TowerTalk] short survey Message-ID: <8
My XM240 and KT34XA are about 10 feet apart on the top of 100 ft of Rohn45. The mast is 22 ft of chrome moly, 11 ft in and 11 ft out of the tower. I have always (2 QTHs in 20 years) stacked the XA on
You can get higher power capability by using a larger core, stacking multiple cores to make a larger core, or using 2 1:1 baluns on separate cores in a series parallel combination to make a 4:1 balun
David, As mentioned, the same antenna at different heights has different patterns. I have high dipoles and low dipoles, high yagis and low yagis and the ability to switch between them as needed. One