Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Thu, 20 Oct 2005 16:32:10 -0400
Here's my project. http://www.rogerhalstead.com/ham_files/tower.htm I just shot some photos of the "elevated guys", but don't have them added yet. After 5 years since initial installation, (4 since a
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Mon, 24 Oct 2005 00:00:41 -0400
This is for a laterally supported load (no side, or tipping forces). My opinion: I'd be very uncomfortable with more than half that on a Ham M or Ham IV, BUT even 400# is a *lot* of weight. Not many
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Tue, 25 Oct 2005 18:20:51 -0400
Never depend on limit switches on a windy day. I released the brake on a HDR 300 and the wind spun it past the stops before I could even start the motor running. They need physical stops at 360, 400,
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Thu, 27 Oct 2005 21:11:56 -0400
One thing to add to the soft pins and shock absorbers. Avoid resonance. In industry we rate the shock absorbers according to the load and the frequency. Nealy all will dampen over a fairly wide range
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Tue, 1 Nov 2005 00:23:21 -0500
With mine it doesn't have to be covered. Just heavy rain or snow between me and the satellite and it's a dark screen. I need a larger dish. Roger Halstead (K8RI and ARRL 40 year Life Member) N833R -
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Sat, 5 Nov 2005 12:23:28 -0500
I actually think this is a better way to go. Grounded metal box with face that opends on the outside, put your bulkhead here, and easy entrance into the hours. The underground concuit curves upward
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Sat, 5 Nov 2005 22:21:21 -0500
Well, it looks like I should have made the climb to get the truss back on the 6-meter beam. They're forecasting winds pf 40 and gusts to 60 MPH for Sunday. The system has seen worse, but not with the
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Fri, 11 Nov 2005 21:49:35 -0500
As of today, Friday the 11th it's $23.40 USD with a 1.17 Euros per USD. That's a pretty good contribution. Roger Halstead (K8RI and ARRL 40 year Life Member) N833R - World's oldest Debonair CD-2 www
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Sat, 12 Nov 2005 15:20:15 -0500
Two pipe wrenches to form a "T-handle" If they can't be pulled out by hand using the pipe wrenches, put a floor jack (with suitable support) under each wrench handle out far enough so the pressure wi
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Mon, 14 Nov 2005 00:35:38 -0500
I was going to say the same thing about the welds and although the photos are a tad small and low in contrast they sure look like inadequate penetration. The photo that is the third from the last sur
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Mon, 14 Nov 2005 00:37:33 -0500
I would avoid any drilling if at all possible. That is a good point for a stress riser/crack to form. Roger Halstead (K8RI and ARRL 40 year Life Member) N833R - World's oldest Debonair CD-2 www.roger
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Mon, 14 Nov 2005 15:40:53 -0500
You 're dealing with different materials and much lower grades though. I'd really need to have the piece in hand to inspect, but to me (and I've seen this in towers and tube welds before) that is th
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Mon, 14 Nov 2005 18:49:10 -0500
If you can find it, try some Beryllium Oxide Grease. BR-2. It is a very slippery, high pressure, low RPM, grease that looks much like graphite, but it is much better. It's a bit easier to apply than
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Wed, 23 Nov 2005 21:22:27 -0500
I thought one of the locals had one, but his is a Pro 97. Man but that sucker is heavy. 73 Roger Halstead (K8RI and ARRL 40 year Life Member) N833R - World's oldest Debonair CD-2 www.rogerhalstead.co
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Tue, 29 Nov 2005 00:55:13 -0500
<snip> Only if each lead is the same length and the same impedance/reactance. The rapid rise time for the current and the wide range of frequencies means only a slight difference in "electrical" leng
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Tue, 29 Nov 2005 13:26:42 -0500
Hi Denny, I don't know how they'd work in your layout, but I've have very good luck with the Logitech cordless keyboards and mice. There is a USB IR source/sensor for each computer and the cords for
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Wed, 30 Nov 2005 17:45:45 -0500
As with most penetratiing oils, WD-40 may take a day or two to penetrate. I noted one other reply on WD-40 being a water displacment oil. Virtually all hydrocarbon oils displace water, but that is n
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Thu, 1 Dec 2005 21:57:58 -0500
I live in Central Michigan and the whole north side of my garage and shop get covered with moss if I don't pressure wash them and use a fungiside at least once a year, but this is the short stuff, n
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Fri, 2 Dec 2005 06:27:59 -0500
Magnetic North wanders around in a rather large circle and changes between a half and a full degree each year (in some areas) in others it may be quite stable. In the NW US magnetic north is quite mo
Author: "K8RI on Tower talk" <k8ri-tower@charter.net>
Date: Wed, 7 Dec 2005 01:05:47 -0500
Maybe a few remember my rotator froze up last winter. The temp is currently down to 11 and the rotator is still working fine. It sometimes starts a little sluggish, but is up to speed in just a few d