Basic rules of presentation: Tell them what you are going to tell them (up front summary) Tell them (3 to no more than 5 points) Tell them what you told them. summary Assume a short attention span. G
How much power are you running when you find your balun warm? Balun dissipation occurs when it doesn't have sufficiently high common mode impedence at the frequency of use. See Kevin Schmidt's (W9CF)
I'm about ready to dig the trench for my feedline conduit. I'm satisfied with the size but unsure of what to do about terminating either end. Both ends will exit above ground and there is about a 2ft
Thanks for all the good ideas! Jim _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contest
Take a look at Kevin Schmidt's (W9CF) paper ( http://fermi.la.asu.edu/w9cf/articles/balun.pdf ) and you might decide that 4:1 transformations are less useful than a common mode choke with sufficientl
Should a rotator loop be constructed so that it goes +/-180 or should it be more like 360-720? The first reverse as it goes through the midpoint of rotation whereas the second would just wind either
Forgot to mention: coax is Buryflex. Thanks Jim ab3cv _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com h
I'm putting a string of 31 mix ferrites on some Buryflex at my feedpoint. What's the recommendation for wx shielding? I was concerned that ice might find it's way to crack them. I was thinking of wra
I decided to go with the wound toroid rather than the string approach. I'm using 5T of 8x on a Biggest Clampon #31 mix. Neat, clean, compact and easy to maintain. Thanks Jim ab3cv ___________________
Noob alert: Just realized I need to provide some sort of support for the cable as it hangs on my AB1342 crankup. I found Kellems as one idea. What other choices are recommended? The tower has a retra
I've got a Channel Master to rotate my Hexbeam. It has only three wires that control it. Anyone know how this functions to turn and indicate direction with only three wires? It has a wallwart that pr
Thanks all! Open loop and occasional sync it is. Interesting article on a homebrew indicator as well. Thanks again! Jim ab3cv _______________________________________________ _________________________
I've got an ICE open wire line protection unit with the little glass gas filled protection devices inside. They're soldered in place. I was looking at the AlphaDelta units which have their gas filled
Anyone have experience with the SurgeGuard? http://www.surgeprotectiondevices.com/ It installs as a shim under the power meter to provide whole house protection. The company claims protection for "st
My electrical service comes in to two peered breaker panels from the meter box outside. The connection from each panel neutral to the Ufer ground ~4ft directly below is via a #4 or #6 (haven't measur
Jim Thanks for taking the time to respond to my newbish question. Although I've been a ham for a few years, my installation of a couple of new antennas have caused me to get more serious about ground
I've got an 88ft that will load but with difficulty on 80m and it is mostly a cloudwarmer on that band. I now use it on 80 and 160 by using the windowline feed as a vertical and the 88ft wire as a lo
I'm doing some antenna switching and one of the configurations would be for a vertical which would present a low impedence at the point of the relay. The other side of the relay is the matching netwo
Forgot to add that I need DPDT capability for this purpose. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting
Thanks for all the good suggestions. The relays will be to remotely configure a windowline-fed dipole between "normal" configuration and a "vertical" configuration which results in the windowline wir