Wouldn't it be easier to measure the phase difference by feeding one signal to the horizontal amplifier and the other to the vertical and measuring the angle of the resulting scope trace? In phase si
But what happens to that 100W? It isn't dissipated at transmitter. Most of it is reflected back down the transmission line. And then 10% is reflected back. And so, back and forth it goes until all th
You don't need an insulator for this. I have a 44 foot tower, and I used a 3 foot piece of 1" angle aluminum with a couple of U-bolts around the tower legs. This places the end a good foot and a half
Not Wayne. That was Dick Bash - back in the days when the question pools were "secret". Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" -- Wi
Get a cat. They eat a lot more than the snake (snakes only need to eat every 1-2 weeks), will catch rodents just for the sheer joy of it, and are much nicer as pets. Bill Coleman, AA4LR, PP-ASEL Mail
As other people have mentioned, these manuals are available on the Cushcraft web site. Depending on how it was previously assembled, pulling the boom apart may be difficult. Since the boom is only 14
Managed to squeeze in an hour on a busy Saturday to do a little tower work. I removed the rotator so I could lower my A3S down for an A743 upgrade. The interesting moment came when I went to raise th
Interesting. I wonder if these guys range all the way to Georgia.... Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 _
These things look exactly like standard Rohn HB25's. I have two Rohn HB25B's holding up my 44 feet of Rohn 25. These look shorter than mine. Maybe clones of HB25A's. Bill Coleman, AA4LR, PP-ASEL Mail
WD40 works great as a short-term lubricant. I've used it successfully to avoid galling on SS hardware -- but you have to apply it just before you tighten or remove the hardware. The problem with WD40
How tall is the hdx-555 & antenna? How high is the 140 foot dipole? Hard to say what would be most effective. You can probably feed the 140 foot dipole, but unless it is a couple of hundred feet high
A 40m dipole at 30 feet is not quite 1/4 wavelength off the ground. At that height, there's not going to be much of a pattern with most of the energy going straight up. 50 is a better height. Even wi
It's probably more because they are 3-5 times closer to Japan than they are to the US... Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" -- W
On Oct 7, 2005, at 9:10 AM, <jacobsen_5@msn.com> <jacobsen_5@msn.com> wrote: Why LPS makes it. LPS 2 is a silicone lubricant. LPS 3 is a silicone corrosion inhibitor. See: http://www.lpslabs.com/ LPS
WD40 containers from about 15-20 years ago definitely did NOT indicate it was a lubricant. Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" --
I've made several tower climbs in the last three weeks upgrading my A3S with the A743 40m kit. I've run across several small ideas I'd like to share. 1) Always carry tape. It's just too useful. Found
If the brake solenoid doesn't click, then you have a problem. If someone is standing at the base of the tower, the solenoid should thunk loud enough to hear. If you go out on the BAMA site, you can f
The run to my Ham-M is about 135 feet. I'm using standard cable with 18 / 24 gauge wires. No problems. Note that by putting the motor cap up near the rotator gives it a little more torque, since you'
If the wire ends are within 0.025 wavelength, you might as well run one. The short radial stubs should be fine. concern would be having wire large enough not to be damaged by rocks, frost heave and o
According to this page, a Ham-IV will support 800 lbs: http://www.rotordoc.com/sales.html Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Quote: "Not within a thousand years will man ever fly!" --