I am interested in this too. If there is an answer could you please copy me as well. Thank you in advance. Tod, KOTO I'm told that this can be done with a diode matrix to power switching relays. Can
If you don't like all that sticky residue try using carbonated water (Perrier is overkill). The active ingredient in the Coke is carbonic acid which forms from the CO2 dissolved (and ionizing) in wat
As a comment on this TOPIC: In the case of a vertical or a dipole, the point of adjusting the length to 'resonance' or low SWR is to be "nice" to the transmitter. Anything thing that does this should
Even if you might be right, why are you persisting in grinding out your grudge against W8IJ on the reflector. If you are right, simply say your piece and let it be. Please stop the personal attacks,
"....First, and most important, the 2-inch pvc is NOT large enough in diameter to accomodate my coax, rotor cables, etc. If I had it to do over, I would go with at least 4-inch and perhaps two 4-inch
Tom has articulated the First Law of Life, "Trauma Teaches". Tod, KØTO List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems, Trylon Titan towers, coax, hardline and more. Also
I finally got around to commenting on this thread. I have had a Heights tower (upside down construction if you recall previous notes on the Heights) up since 1971. I did experience one catastrophic f
I wonder what the cost of silver plating the coils would be? I guess you would have to be certain that the coils are built correctly before you would take them to be plated. Tod, KOTO Towertalkers, I
I use Dow Chemical Silicone Stopcock Grease from a giant tube saved carefully after my classes in Analytical Nuclear Chemistry at Ann Arbor Michigan. (Shortly after the Bronze Age according to my ch
I scanned my manual and sent a copy to Marc. If there are others that wish a copy I will upload it to a web site and send out the URL. Since it is about 1.5 MB as a .PDF format file, I would just as
The URL for the scanned Cushcraft 40-2CD manual in PDF format is ftp://mirage.skypoint.net/pub/members/t/tao/docs/40-2CD.pdf Tod Olson, KØTO List Sponsored by AN Wireless: AN Wireless handles
I have been asking around without any luck for the frequencies that the TH7 traps are set for. This would be out of their normal position in the antenna. Is it possible that someone with a GenRad 160
I suspect that I could get this answer from a diligent search of the TT archives, but it is much more fun to get current thinking and experience. I am planning to install a 40 meter beam (40-2CD) on
There have been some interesting cautions put forth on this topic in the past few days. Without no disrespect intended, I wonder if we haven't identified most of the challenges to switching in a segm
You are correct Tom, your solution #1 does deal with the 'how to successfully switch" the top hat. I have no issue with the fact that solution #2 does provide dual frequency operation, but I don't th
See, already we are getting some additional creative ideas (Tom's vacuum relay solution being credited as the first). I had forgotten about the fact the we already use traps in horizontal antennas so
I am sure that I must be missing something in my reasoning, but drawing from my faint recollection of advanced calculus and/or vector calculus it seems to me that the solution to the wind force on an
Wasn't the original purpose of this discussion to allow someone to put together a tower and antenna system that would neither blow over in the wind nor be 'crushed' under its own over-designed weight
Hank is bringing us back to reality here with these six practical statements-- (1). For a flat plate of W width and L length with the W dimension normal to the wind the projected area is the width W
I agree with Tom. I had a three band, 4 element quad up 88 feet at my Minnesota QTH for several years. The wire I used was insulated, #12 stranded, copper. At the attachment points on the spreaders I