Actually, there has been quite a bit of work done on fractal antennas over the past ten years or so. (numerous IEEE Antenna society articles) Your mobile phone or 802.11 equipment may use a fractal
Yeah, but it's AUGUST now - my tiny brain can only think of one month at a time :-) 73, Ward N0AX _______________________________________________ _______________________________________________ Towe
"Every spring a male Cardinal endangers himself by perching on the outside bay window ledge in my dining area. He guards this space with gusto..." Must be an infielder. Does Tony La Russa know about
"Also, Ward is off-track. It's not the TV the bird wants. If it's a Cardinal from St. Louis, and he's there for the gusto, that can only mean one thing: Bud Lite." Dale, Dale, Dale... If there's one
Is that laden or unladen? 73, Ward N0AX _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.c
Just a thought... It could be that the transients associated with pulsed currents to the motors is causing the controller or power supply to shut down. The transients might not be large enough to cau
K4SAV generated some useful numbers - thank you. - - - - - Here are some EZNEC numbers for a three element Yagi turned either vertically of horizontally. Height ___ Horz Antenna ______ Vert Antenna _
If your ground is vertical, you have been drinking too much and are laying on your side. 73, Ward N0AX _______________________________________________ _______________________________________________
Steve does most of the talking here on TT, but I thought I'd qualify the remarks with some typical engineering obfuscation... The Mosley's we tested did not match the competition in either forward ga
If the poles flip, will we have to start DXCC over again? THE HORROR! OH, THE HUMANITY! continuously expanding seafloor to either side of the mid-Atlantic rift, it's clear that the crust barely notic
And for Towertalk content, plastic owls don't have to be moved because owls can swivel their heads more than 180 degrees in either direction. 73, Ward N0AX ** ** _ Seems the non plastic ones still ne
For a short tower (40 feet, Rohn 25), I put threaded J-bolts into the footing with a nut and heavy flat washer on the threads. I slid the bottom section on to the bolts and adjusted the nuts to plumb
I have repeated this to myself many times when doing tower work or climbing a tree - "It's not a race!" Nobody is timing you, it's not televised, no one will complain or laugh if you stop and take a
As long as we're discussing sealing, I have a question about sealing coax pigtails. Waterproofing the end of a coax pigtail can be difficult because of the exposed braid and the stranded center condu
While we're on the math subject, does anyone know of an equation that gives either feedpoint impedance or radiation resistance as a function of position along a linear radiator of known electrical le
Oh, right...duh. The current equation will do - but the radiator (I may have confused things by referring to it as a "dipole") may be anywhere between one-half and one wavelength long, so the curren
20% ought to do it. There will be significant variation depending on proximity of ground, type of ground, and so forth. At this point, I'm just doing a feasibility study. 73, Ward N0AX _____________
Elliptic integrals would be preferable to watching the Seattle Mariners blow another ninth-inning lead :-) Thanks, Jim - this is going to get me close enough! 73, Ward N0AX __________________________
Sorry for the bandwidth - W6RMK are you monitoring the reflector? Email to you is bouncing - please contact me off-list if you see this. Thanks! 73, Ward N0AX (n0ax@arrl.net) ________________________
A common source of diodes connected to just such a means of excitation and re-radiation is rotator control boxes. The current-steering rectifiers in the control boxes (I'm most familiar with the Tai