Just an add to Grant's good comments - look for any stenciled markings which can give a clue as to the material. KM5VI --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] O
Brian, I recently made up new cables and installed them on My LM470. I have detailed notes & sketches. Send me an email off-line if you need them and I will happy to pdf them to you. 73 Matt KM5VI I'
Just want to reiterate on advice from N6SJ, AB7E, KK9A, & VE4XT... get with a qualified structural engineer if there is any doubt about the compressive strength of the soil you are placing the founda
Suggest to call John at Superior Bolt & Nut Mfg. (602) 841-8100. He is a primary supplier for galvanized anchor bolts including ATSM F1554 Grade 55 with the plates already affixed to the bottoms. He
I'm looking for some Hy-gain Long John info: 1. Has anyone retuned a 153BA for 12m operation and can provide their final dimensional settings? 2. I have a pair of older 204BA's with the # 175121 beta
Please disregard question #2.... I just realized the original design was not adjustable. Matt KM5VI I'm looking for some Hy-gain Long John info: 1. Has anyone retuned a 153BA for 12m operation and ca
The MA-550 tower by itself came shipped with (2) 1/2" x 10"anchor bolts and a wall bracket. It was not designed for free-standing installation. It was required to be "bracketed to the eve of a house
For the setup you have given: Max lifting cable tension = (M1 x T) + (M2 x A) Where: T = gross tower weight A = top payload weight M1 = ratio of moment arm from tower mass to lifting point / SINE min
Three thoughts: For a horizontal beam it is theoretically possible, but in the practical world, difficult at best (not really viable) because of the compromises in efficiency and useable bandwidth. F
Have you considered taking the alligator approach with improved ears? Stay with your dipole and QRO if you can't be heard. Invest in the best, small, directional receive only antenna that your budget
Extrapolation of scaled dimensions is not a good assumption in this case... see link (and others).... or model one. http://www.qsl.net/4s7ab/broadbandhexbeam40m4s7ab.htm KM5VI --Original Message-- Fr
What kind of tribander? Is it possible to take the typical triband yagi and shorten it some to use it only on 15 and 10m if you are limited on space? I guess this would involve removing the element e
I have acquired several Hy-Gain baluns that came along with second-hand Long Johns. The labels are long gone off of these. Is there any easy way to determine if they are BN-86 or BN-4000? Thanks, Mat
I get it now - transformer vs. transmission mode. Thanks Hector ! Matt From: Hector Garcia,XE2K [mailto:j_hector_garcia@sbcglobal.net] Sent: Tuesday, October 29, 2013 8:36 PM To: Matt Subject: Re: [T
Concrete cures very quickly at first and slows as time progresses - most mixes will develop about 2/3rds (or more) of their 28-day strength within the first 7 days after placement. I have erected cra
The link below shows some diagrams of different anchor bolt types. Which ones do you have? The last HDX572 design calculations I have from UST specify (6) 1" by 27" ASTM F1554, grade 55 (55,000 psi y
Just for information only, I seem to recall that the pull-out improvement is not a linear function of the area under the nut (plate, washer, etc) because the principle stresses in the footing develop
Hi Ray, At 220 V, 5V sag is about 2 % V drop. Assuming balanced load, your 110 V control power would only be down by 2 or 3 V which should be plenty stout to hold in the control relays. Is this a 2HP
Are you running the conductors underground in conduit? If so, THWN-2 (Thermoplastic Heat & Water resistant Nylon) wire is suitable for wet locations - but not direct burial. Most commonly available T
Great Story :) KM5VI Lots of knowledge has been lost over the past 60 or 70 years. It is important to take time to see where we have been before determine where we are going. I had a coworker that th