Im looking at a 4-bolt flange bearing for use as a thrust bearing on the top of my tower. Trying to avoid the Rohn bearing. My mast measures 3.005 OD. I can find a lot of 3 flange bearings but NONE o
I would be interested in the specific N2PK use method for measuring transmission chokes as well. I never have got my Z data to come anywhere close to what Jim has published. By not anywhere close, I
Im mounting a couple of big raks in some 55G. The Alpha docs say plenty of room but the rotor only sits in there in a couple of orientations. If you have a photo of how your rotor is mounted in a 55G
Whats the best way to connect the copper wire/strap to the 55G tower leg? Im planning to clean the galvanized leg, wrap the leg with a layer of 0.005 SS shim stock and then use a couple of SS hose cl
Another thought... Think this clamp method would be acceptable under NEC? 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie What's the best way to connect the copper wire/strap to the 55G tower le
Im looking for a recommendation on some sort of small radio that could be used when we have guys up on the tower. The catch is I would like to find something that would have a shared frequency so we
I have finally succumb to the wisdom of the board and ordered up some commercial Penn Union clamps which have 3/8" u-bolts and a comparatively huge bronze clamp. They are sized for my intended wire a
Thanks Dick. I see your comment on the silver solder. I wanted to see if you were referring to plain silver solder (lower temp stuff like what you would use with a big soldering iron), or if you were
What does the NEC code (meaning a safety ground and not the more expansive proper lightning dissipation) for minimal grounding of a tower? I need to get the rural county building inspectors out to lo
They want to see ground rods. They look at houses every day and the inspector told me he had never looked at a tower before - ever. Plus the tower base is poured 6 weeks ago. So I need to put in a co
Thanks for all the guys who fielded questions on the grounding topic. Had the final inspection today and the guy did not ask a single question about it. So I guess he saw what he wanted to see. 73/je
I have some LDF5-50 (not the newer 50A) and am trying to determine what connector would fit that. Everything I can find refers only to the 50A version and not the older 50 version. I have used the AL
For the 50 vs. 50a question, it's actually possible that 50 predates the internet. The coax I have has been setting in storage for probably 20 years and I have no idea when it was actually made. May
I found some references to the non-A series by looking at connector box labeling. For example the L5TNM-PS connector had the -50 part number listed. Searching again for box tabs on what looked to be
I suppose guys don't generally give the win ratings much thought - until you have a "wind event" which brings a bunch of your stuff to the ground. That was certainly the case here - we had a tornado
To the gentlemen's question, if you are not near a BC station and the use is primarly outside, the 259 is really a good box. But it really depends on your intended application and importantly if you
Thanks to Jim for his mechanical help on this 17/30 antenna. It will go up (if the plan holds) later this month. I would temper Jim's comments though for the practical. It took a lot more work than I
I want to cut a slot in the yard about 12 wide and about 12 deep to accommodate tower wiring here on the site. In total the runs are about 1400 foot. Is a trencher the right tool for that job? I have
Kurt did you do an analysis of the 40m beams put up there at Comstock this last summer? 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie Jim Thompson, Jim Lux et al...... Your comments on this su
Hi Wayne, Not much in the way of rocks here but roots are an issue at a couple parts along the run. So the idea with the big cut is to clear a path that would buy some insurance spacing of the wires