Tom, I appreciate your level headed approach to this subject and many others. There is a tendency to spin opinions into fact either on purpose or by flawed thinking. As an analytical chemist for many
Roger, I use two half slopers on 160M with the feed point at 100 ft and under a number of yagis. One slopes east and the other west and I do have gain in the direction of the slope. More than two hal
My experience differs...properly sized thrust bearing side screws ARE used to support the weight of the mast and antennas at my QTH. I have not had any adverse reactions from using this method and it
Here we go again...making assumptions. When you are using an undersized thrust bearing I can see your point Kelly. Not everyone is using a CDE (MFJ) Ham or Tailtwister rotor. Have you ever seen the b
There you have it...one of the best ways of configuring the mast and rotor. Doug David Robbins K1TTT wrote: On my flat tops I always put a second bearing just for that purpose above the rotor. To kee
Tony, I worked on a friends A3 and checked the traps with a dip meter. One trap (can't remember which...doesn't matter) did not dip where it should. If you pull back the inner black cap you will find
Has anyone successfully added a CW/SSB relay box to the driven element of the Cushcraft XM240? And if so, how did you do it? Doug Keith Dutson wrote: I have two of the F12 antennas. Both have the rel
I have used the HD-1250 to successfully dip A3S traps from two different beams. Yes, it needs tight coupling. Doug Bill Coleman wrote: I've had very little luck trying to use my HD-1250 dipper. (Tech
Tom, it is not because you are reaching your 60th birthday that your climbing days are over...there has to be other real reasons. I expect to tower climb into my late 70s or early 80s. Yes, I am phys
Individuals and companies that DO NOT treat a customer fairly should be reported as a warning to other potential customers. Individuals and companies that DO treat a customer fairly should be reporte
Anyone have any experience with the Glen Martin TB-25 thrust bearing as to its durability and load bearing capacity? Would the TB-25 be a better choice than the Rohn TB-3? Doug -- Doug Renwick VA5DX
Another way of cutting the non soldered braid is to use a piece of thin wall Al tubing whose ID is about the same as the OD of the dielectric. Slip that piece of tubing between the braid and dielectr
Thats an easy question to answer...Spid without a doubt. Lee Buller wrote: So, what do people like out there? T2X? Yaesu? Stay with what I got? AlphSpid? Lee - K0WA -- Doug Renwick VA5DX PO Box 50, C
Tom, Boy, there sure is a lot of bitchy hams around these days. Why not buy a good quality rotor in the beginning? It will be with you for a long time, provide trouble free service and you can upgrad
My 30+ years of experience agrees with Keith. At a number of different locations I have never had a lightning strike to my tower(s) crack the concrete pad. The legs of the towers are attached to grou
Does anyone know the maximum vertical load specifications for the TB-3 and TB-4 thrust bearings? Doug/VA5DX _______________________________________________ See: http://www.mscomputer.com for "Self Su
John, Please refrain from trying to turn speculation into fact. You obviously side with KQ2M. You and I do not know the facts! To pretend that you do, only adds 'wood to the fire'. On one hand you sa
From my experience of 30 years I have to agree with John that a good cone of protection does exist. There are not many things in life that give you a 100% guarantee...If you come close to 100% you ar
Make sure: 1. Some/all traps are not installed backwards. Pull the black plastic trap covers off. The coil cover is screwed to the element and the screw end should be towards the boom. 2. The outer t
If all you did was to interchange traps then you only moved the problem from the driven to the reflector. You still have a problem albeit disguised. Something is still wrong with a trap(s). Doug -- D