I am installing a used Tri-Ex LM-354 crank up tower. Can anyone tell me the proper grade of bolt (hardness) to use in this application. The LM-354 tower is 54 foot self supporting and will have a 3 e
Thanks Skip, I appreciate your time and experience. 73, Ron W8RJL -- Original Message -- From: <KJ6Y@aol.com> To: <towertalk@contesting.com> Sent: Friday, March 26, 2010 11:34 AM Subject: Re: [TowerT
I looked at the site. Did your training today recommend the full body harness for general tower work? I have two lineman belts but should upgrade. Ron W8RJL __________________________________________
NO = Normally Open, NOT normally on. Normally = non energized relay coil. 73, Ron -- Original Message -- From: "Dennis Vernacchia" <n6ki73@gmail.com> To: "Tower and HF antenna construction topics." <
about 32 feet depending on the diameter of the vertical. The larger the diameter of the vertical the shorter for a given frequency. The length above the trap to resonate on 30 Meters will depend on
Rick, you are correct, I was in a rush and had my thinking backwards. depending on conductor diameter. The trap should be resonant at about 10 MHZ. It is better to error on the low side. On 40 meters
Our 800 MHz commercial site towers used solid state relays. Low voltage control to a solid state relay block. Only had one failure in 10 years and that was due to a big lightning hit. I retired 2005
Well Bob, I like to believe we can not all be experts and that is why I belong to several clubs and subscribe to this reflector to make sure I am doing thing correctly. I applaud the guy who contacte
Patch panel is good idea and I am leaning that direction. They make male UHF and N connectors with no threads so you can just push them on the panel female connector. I built a patch panel like that
If the rotor has been removed and the bottom of the mast is accessible we have used a pulley device (homemade) that fits in the end of the mast. When installed it is a pulley firmly attached to the b
Per Tashjian Towers, rebar that is to be welded should be type A706 and no smaller than #8 (1 " diameter). I talked to him when doing my cage for a LM-354. Also, Wicapedia says under Welding Rebar: T
For anyone who might be confused by the armature and parasitic verbage here is what Allan Bradley has to say about Form X relays: A Form X contact arrangement is one which has single-pole, single-thr
I cut my teeth on relays so I understand SP, DT, NO, NC, lathing etc, etc. I don't think there is anything parasitic involved, by parasitic do you mean the capacitive coupling between the moving cont
I just obtained an old AP8 which was broken off at the base. There is a round black plastic blob directly above and connected to the center pin of the SO-239 feed point connector. I have reviewed the
Bill, you may be correct, I guess there needs to be some way to keep water out of the back side of the SO-239 and a molded blob of plastic would do that. If you get a chance check your feedline with
Why not linear load the boom. Use a conductive standoff at the end of the boom, connect a wire to the top of the standoff and stretch the wire back toward the mast area. Use insulated stand offs as n
I find that when taking things apart it is often very helpful in reassembly if I shoot quick digital photos as I disassemble. This goes for rotors, radios, etc. Its just a tool like scratching across
Dan, Think of the waves of energy radiating out from your vertical, rolling out across the ground. This energy that hits the ground needs to get back to the shield side of your coax. If the radial wi
Gary, I tried to get the article from the ARRL members archives section but it is not there. Closest thing I can find is attached. Maybe someone can find the original QEX article for you. 73, Ron W8R
Marc, It appears you have a Mosley MP-33 antenna. See http://bama.edebris.com/manuals/mosley/mp33/ Don't sweat the small stuff. Put the anntena as high as possible for testing and using an analyzer s