Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Sat, 16 Jan 1999 13:06:28 -0500
I just took some cable loss measurements with my AEA CIA HF Analyst and got some odd results. The net one-way losses for my 260-foot run of LMR0400UF are: Frequency Measured Computed Loss Loss 3.750
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Mon, 18 Jan 1999 00:44:46 -0500
Thanks, Tom. That sounds like what's happening. The coax length will change by a few feet when I get done with my station changes, so perhaps that will shift the bumps enough to confirm the theory.
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Mon, 18 Jan 1999 00:56:59 -0500
I'm not going to touch that line... I assume you are referring to insertion loss from in-line bandpass filters. I'm planning on using combinations of parallel 1/4 and 1/2 wave open and shorted stubs
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Tue, 19 Jan 1999 02:00:49 -0500
For info on stub filters, see K1TTT's web site: http://www.berkshire.net/~robbins/technote/techref.html Scroll down to "Stubs" and follow the links. 73, Dick, WC1M -- FAQ on WWW: http://www.contestin
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Tue, 19 Jan 1999 09:37:11 -0500
For what it's worth, I installed the two-radio switching system (anyone interested in just how many months it takes to design and build an automatic two-radio switching system, and what it takes to i
I bought some Polyphaser 2KW panel-mount supressors last year that had nice rubber caps over both SO-239s. One was black and one was red. They fit nice and snug and seemed pretty rugged. I bought som
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Wed, 27 Jan 1999 12:54:43 -0500
Indeed. Seems to me that the right approach would be to determine the proper torque rating for the bolt/thread combination. Then you could use a torque wrench to get the bolt tight enough but not to
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Fri, 29 Jan 1999 14:40:45 -0500
U.S. Tower's remote control package for the raising/lowering motor uses 120VAC to drive the relays at the tower. The control box is nothing more than a bunch of 120VAC switches and some 120VAC neon l
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Thu, 3 Dec 1998 15:54:34 -0500
Yes. I believe someone suggested a rooftop tower, which would certainly be a much better solution than the mast. But there are some important considerations. First and foremost, a rooftop tower need
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Sat, 5 Dec 1998 14:00:50 -0500
That can work. If you can find a long wooden dowel that's exactly the same diameter as the inner piece, you can insert it into the outer tube and gently tap the inner one out while heating the outer
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Sat, 5 Dec 1998 16:11:41 -0500
in Depends on where you live, Steve. Here in Live-Free-or-Die country it took about 15 minutes with the town zoning/building officer, $26 in fees, a two-week waiting period (a notice was posted on t
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Thu, 10 Dec 1998 11:33:24 -0500
Texas Towers has what you need and they are a pleasure to deal with. 73, Dick, WC1M -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative re
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Fri, 11 Dec 1998 01:32:26 -0500
manufacturer Steve is right. I have an MA-770MDP and feel that while the motor is expensive, it is not overpriced and is not overkill for either my tower or the MA-550. I wouldn't dream of trying to
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Fri, 11 Dec 1998 15:26:43 -0500
The manual winch on the U.S. Tower tiltover fixture explicitely says, "Crank by hand only". Presumably this means don't use a drill (cf., LXC directive.) I imagine that the same goes for a manual rai
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Sun, 13 Dec 1998 01:36:25 -0500
It's great. Quality design, quality construction. Amazingly versitile. One of AEA's goals was to provide a lab-quality instrument at a ham price. I think they've come pretty close. The graphical disp
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Fri, 18 Dec 1998 10:30:42 -0500
Are ther no gals on Tower Talk :-)? (snip..) sections. (snip...) This raises an interesting question about mounting water-sensitive components outdoors. Is it sufficient that the box be watertight,
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Sun, 20 Dec 1998 09:04:29 -0500
I've got a full-sized 40M 4-square, with 60 radials per element, so lots of wires meet in the middle of the square. Before building it, I tried to get a definitive answer to this question and couldn
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Mon, 30 Nov 1998 21:37:45 -0500
This is a multi-part message in MIME format. --=_NextPart_000_01FD_01BE1CA9.AB1E6820 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit --=_NextPart_000_01FD_01BE1CA9.AB1E
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Mon, 2 Nov 1998 01:36:44 -0500
I just got a great propagation program called WinCap Wizard. It has provision for entering gain and take-off angle data for up to three different antennas, and I'd like to try some predictions with n
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Wed, 4 Nov 1998 10:41:17 -0500
One problem is that the Polyphaser suppressors are not weatherproof. That means you have to build a weatherproof enclosure of some sort for them at the top of the tower. I didn't put a suppressor at