Not the answer to your question, but in a previous house I ran cable through the attic and sometimes it interacted with house wiring in the attic, generating RFI in the TV and stereo. This typically
I have the real world experience you're seeking. Back in 1997, I built a full-size 40m 4-square with 60 ground radials per element. It worked great, and beat the heck out of the full-size monopole th
I use these: http://hr-micro.com/ In addition to having two MOVs and a fuse per line, the board can be purchased without the enclosure so you can mount on the ground panel inside a weatherproof box.
The original version of the military AB-577 crank-up mast used 1/8" stainless steel guy cables. Very nice kit. 73, Dick WC1M _______________________________________________ __________________________
I have three TIC rings on my tower, so a trip to the top and back involves a lot of climbing around rings. I stopped kneeling on the rings several years ago. It was really awkward and banged up my kn
Glad you put it that way, Jim. I think the term "single point" has confused a lot of hams. The essential thing, as you say, is to make sure all the grounds are bonded together by the shortest practic
There's some truth to what you say, but bear in mind two things: 1. The tower in question has four 50' 1/0 buried radials with 8' ground rods Cadwelded every 16 feet. Quite a bit of dissipation capab
Vince, Im not exactly sure where I first got this information. I checked my copy of The Grounds for Lightning and EMP Protection by Ron Block (originally published by PolyPhaser and now out of print)
Hi Dick, I would second all of Jim's answers. A few extra points: 1. You can get a 3" foam mouse at your local electrical supply store (the one local contractors use). Home Depot might have them, too
Couple of afterthoughts (after reading all the other posts): 1. I believe the rule of thumb is that the conduit should be at least twice the diameter of the cable bundle. 2. A lot of people have repo
I guess it's possible. My conduit runs are terminated in weather-sealed Hoffmann metal boxes at both ends. The box at the shack end is mounted to the house and has holes drilled in the back just abov
Following up on the big hole in the bottom of the box, they make PVC feed-through bushings that will keep the cables from abrading against the cut metal edges of the hole. Water won't get into the bo
When I installed my 72' rotating tubular motorized crankup back in 1997, I used LMR400UF. Big mistake. IMHO, that stuff is so stiff it shouldn't be called "flexible". There were a number of issues wi
Patrick, I'll be happy to share details of my installation. Might have some photos as well. But first, what kind of crankup tower do you have or plan to have? 73, Dick WC1M __________________________
Any anchor that's exposed to soil is at risk of corrosion. Anchors sunk in concrete are just as vulnerable because typically a good portion of the anchor rod is not in the concrete -- it's in contrac
Not always simple, especially when you use a large anchor block and have property with lots of ledge (like mine.) That said, when your tower is on a steep hill, multiple anchors per direction is the
My approach to tightening nuts when no torque setting is specified is to pay close attention to the "feel". Screw the nut onto the bolt by hand until you can't turn it anymore. Slowly turn the nut wi
Today a commercial wireless ISP approached me about placing a group of antennas on my tower and a "small" building at the base. In exchange, they offered free installation of a fiber optic cable down
Thanks to all who replied to my query. I got some great advice. Several responders indicated that there would inevitably be some RFI to my ham station. That's simply not acceptable. I'm a serious HF
I don't see any replies, so I'll take a swing at this. I have the MDP-720 MARB. One issue you may have is that the base doesn't fold over. It's the mast that folds over. So yes, the 23.5' portion wil