I'll see your argumentum ab auctoritate and raise you a post hoc ergo propter hoc and a misleading vividness. Inefficient wasn't the criteria. Omnidirectionality was. I have an 80 meter inverted V hu
Using my completely anecdotal, un-analyzed and un-modeled experience, a 16 foot high inverted v powered by 1500 watts allows me to work any 80m station I can hear during November Sweepstakes from my
I believe that's exactly what it means. For a concrete pier you usually see rebar arranged in a circle when viewed along the axis and tied together with circular sections of rebar that form the circ
802.11 wireless internet over that distance is quite within range for even modest gain antennas. I've done a couple miles with 802.11 radios with inexpensive yagi antennas. The problem is that the ch
Isn't Phillystran overkill for that application? If you were to even try to preload it (I don't know why you would need or want to do so in this case) wouldn't it rip the antenna apart? Al AB2ZY ____
Why not mount the bearing inverted, i.e. inside the tower? That requires "only" disconnecting the mast from the rotator. If nothing else, thrust bearings aren't expensive and it would at least provid
For the ham, virtually no advantages and one major disadvantage. RoHS is a regulatory environment specific to the EU that regulates the amount of lead that can be used in electronics that might end u
By the way, the last generation of tube based Tektronix test equipment used a point-to-point wiring system that consisted of leaded components soldered to ceramic standoffs (think terminal strips wit
Last generation of TUBE equipment. For oscilloscopes that would have been the 500 series, no? Al AB2ZY ________________________________________ From: TowerTalk <towertalk-bounces@contesting.com> on b
Brazil also has significant import duties on anything made in country. There might be an exception for ham gear; I don't know. For things like consumer products, locals stuff them into a suitcase and
I doubt there is a Lowe's in Cuba and the embargo kind of precludes mail order from there. Al AB2ZY Hi Douglas, Lowes is selling a harness for roofing work. I haven't checked it out but looks OK. The
If they're only rated for a few seconds (yeah, they are), then the difference between transformer and mineral oil is probably measured in milliseconds - not enough to bother. The thermodynamics of a
There used to be a chart on the side of the Heath cantena that showed the difference between transformer oil and mineral oil as far as power/time. As I remember it was rather a significant difference
While this antenna undoubtedly sucks for what the typical amateur wants from HF, it seems perfectly suited for what the military mostly used to use HF for - tactical regional communications over a co
He's absolutely correct. This was discussed (over)extensively during the last week! It is an electrical safety issue. Al AB2ZY ________________________________________ From: TowerTalk <towertalk-boun
QST is not peer reviewed. All kinds of nonsense can make its way into print. The notion of copious condensation in buried conduit has always seemed like ham urban legend to me. First off, there are l
I'm sure it will make a difference. The question is will it be perceptible?! With ground radials, it's a situation of diminishing returns (# and length). A rule of thumb is that the radials should be
It's not clear what you are doing. If you're talking about a standard 25G self supporting base plate, where are the two bolts that don't line up? If they are inside the footprint of the new baseplate
Without an audited income statement and balance sheet or a few years Schedule C, how can you tell? Al AB2ZY All, Here is the link for information regarding the SuperBertha Antenna Division being for
Andrew is CommScope. The use of a pre zip code postal code indicates the years between 1943 and 1963. It is probably some sort of FM antenna meant for use on an existing AM broadcast tower. Al AB2ZY