An additional comment for building a tower and stack without a crane. For a long mast it helps if the mast is placed inside the tower at the start. Then the mast hoist can proceed when the tower is u
Stacking is one way to go for VHF bands, if there is enough mast and tower capacity. My question is stacks versus interlaced yagi's. There are several commercial choices of 2m/70cm yagi's interlaced
Passivated SS, which is frequently the case for machine screw sizes (< 1/4-20) is much less likely to gall. Passivation tends to make the screws more gray in color and less shiny. Lanolin is also a "
We agree that a fraction of an ounce of prevention is worth more than what it takes to get a galled 1/2-13 SS bolt apart. However, Lanacote etc. (anhydrous lanolin) has been used on SS sailboat riggi
The usual "rated" safe hoisting or personnel working load on new ropes is 10% to 15% of specified breaking strength. For hoisting, dacron or other low stretch ropes are better than nylon which becaus
Put the part with the sheared bolts into the oven at 450 F for an hour. Aluminum's coefficient of expansion is much more than steel so that should break them loose. Drill for the screw extractors fir
In 7 hours, with minor digging, two of us buried 1000' of sch 40 1" PVC pipe 18" deep, Since the process worked so well and is extendable to conduit, direct burial coax and radials I thought I'd pass
Here are some links and pictures Condux pulling grip on ebay http://cgi.ebay.com/Condux-08642049-Mesh-Pulling-Grips-/320391828972?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item4a98d755ec would handle 1
My HF rules are - 1. never buy anything with a Chinese motor. 2. buy their iron tools, they are cheap and reasonably good. That said, the quality gets better every day - check out the $9.99 digital c
We all dream of that perfect site - 1000' above all else for 360 degrees. I found such a site, but so did 6 or so commercial tower/transmitter operators before me. The towers range from 100 to 250',
Thanks to all who provided comments on this topic. They were all great and helpful. I've decided to pass on this QTH for the reasons advised and some cursory measurements I made with a mobile rig. He
Lucky you! I moved and lost my source. You can use a coax matching section at the antenna if they are monobanders, this works fine and you need a flexible loop anyway. I ran 7/8" CATV hardline 350' t
Can this chart be correct? 1/2" ice antenna sq ft numbers are higher in many cases than no ice. Weird for such a large increase in projected area. Grant KZ1W _________________________________________
The MGN system isn't used in my neighborhood (Santa Clara County, CA). The poles and undergrounds are 3p delta so each pole pig hangs across one pair of the three wires. Local ground is the center-ta
I have an older LM354 per nameplate and the bottom 4 hole mounting flanges measure 20" outside to outside. The heavier duty towers step up the section sizes. Grant KZ1W ______________________________
I recently looked at several sites in 7 land with the same concern. It seems there are power lines everywhere! I used a mobile rig, LDG tuner, and whip antenna to measure noise on several bands, whic
I have two verticals on galvanized roofs. One is a capacity hat loaded 40' x 3" irrigation pipe on a barn 50' x 30' for 80m elevated 20' and the other is a 1/4 wave Al tubing for 40m on a pole shed a
re: metal roof problems: If I look on a spectrum analyzer connected to a separate antenna, what should I see? Where should I look re the transmit frequency? Is cross modulation the problem or is it i
One problem not mentioned in this thread is the short survival time if suspended by a full body harness. While there is a product being sold, here is a web site with a lot of sobering information htt
Moisture reacts with trace contamination in the plastic or there are other trace compounds that oxidize the copper. There are so many variables in off-brand coax, who knows what it is. On the other h