I have just bought a 3-element 6-meter yagi (Cushcraft), and plan to mount it above a C-3E tribander. Would a quarter wave spacing above the tribander be sufficient (5 feet), or do I need more? I'l
I have two Asus 27" monitors, one two years older than the other. I had to wrap the HDMI video cord from the newer VS278 around a #31 toroid (about 6 turns). The older one (VP278 VGA driven) didn'
Given how much operating is being done these days using complex remote stations, it strikes me that a 10x10 hut at the base of the tower, with everything in there but the operator end, is entirely fe
I'm well aware of the latency consideration you raise, Jim, but many remote contest ops seem to have managed them satisfactorily. I've been to W3LPL many times, and if his house were 600 feet from h
I think these lessons Hank explained so well aren't just for KT-34 variants or tribanders. In WV I had a stack of Force 12 C-3Es, with a Force 12 2-element short 40 above the top one. Performance o
About 25 years ago, I modeled this extensively, using TH-7s and C-3s as my antennas. I wrote an article in NCJ for July 1996 on my results, but unfortunately it is not available online. I concluded
PS - I wound up at 69 and 97 feet because of guying considerations on my Rohn 25 tower 73, Pete N4ZR Check out the new Reverse Beacon Network web server at<http://beta.reversebeacon.net>. For spots,
I have a C-3E in an AB-577 rocket launcher, which Force 12 rated at 5.9 square feet of wind load. I am thinking about a little more antenna, and wonder what other people have used successfully on th
Crimey, and this is an engineer who did computational structural analyses of the masts on America's Cup boats. I think what this is probably telling me is that I can safely put a small 6M yagi on to
I am looking at stacking a 3-element 6-meter yagi above my C-3E tribander at 50 feet above ground. What does experience suggest is a minimum stacking distance to avoid seriously degrading performanc
This is pretty speculative, so if anyone wants to erase now... My AB-577 (the first and only one I've ever been up close and personal with) has a short stub of tubing that is integral with the top gu
Duhhh - I apologize for the stupid question. I don't know what I was visualizing. Of course, what you describe is exactly how it works in my case, and I will simply need to substitute a longer piece
Anyone got a 3-element 6M yagi (like the M2 6M3) that you've taken down or replaced with something bigger? They're actually small enough to ship UPS, at 8 pounds, hence my asking here - please let m
I have just bought a small Cushcraft 3-element 6-meter yagi. Only small fly in the ointment is that it is *only* rated at 1 KW. It looks to me that this limitation might relate to the feedline conn
But MFJ still uses the name, and has a separate phone number for it, and someone's still cutting aluminum with that name on it. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at<ht
Ontario Surplus has just come up with a new supply of AB-577s and parts - no idea how many, but prices on their website, and seem reasonable. 73, Pete N4ZR Check out the new Reverse Beacon Network we
I just bought a new Ameritron RCS-10 to replace my old switch, which was damaged by lightning. In reading the instructions, I was struck by the suggestion of making 2 6" diameter turns in each coax
I'm also deeply skeptical of just using U-bolt clamps to do this job - far better to pin the joints with grade 8 bolts, so you never have to worry about their working loose through seasonal temperatu
I have a F12 C-3E on an AB-577. The tribander mounts on a very short stub mast out the top of the Yaesu rotator. There is no thrust bearing or other support for the mast. I recently bought a Cushcr
Just saw on the CWOps reflector that K7NV passed away last week. Back in the mid-1990s, Kurt's work in failure analysis of Rohn towers broke new ground for me (and I suspect, for most of us). At the