The point raised earlier about choosing an antenna rated one band below is apt. I had a Butternut HF6V. On 40, 20 and 10, it was decent. On 80, I may as well have put out a dummy load. Seriously. I n
Hi Arnie 468/f equals a half-wavelength dipole. Fed in the centre, it should work fine. Have you looked at any of the half-wavelength loops? They're basically a dipole shaped in a circle. They're che
Hi Larry What's the population of non-metallic supports like at your QTH? (Read: trees) The ladder line vertical Ray mentioned might work very well, particularly if you get it off the ground. You'd n
Are there any Lowes in Cuba? Are US businesses still forbidden to send to Cuba? I don't know if it's a glitch but our moderator has sold harnesses that weren't too expensive before, though his Safety
Hi Mike, http://www.kf7p.com/KF7P/Mast_Steps.html Again, not a mast with steps, but steps for a mast. 73, kelly ve4xt Sent from my iPad _______________________________________________ _______________
If you needed to choke an already-connectorized RG-8-size cable, you could use a pair of Biggest Clamp-on, mix-31 ferrites. The two clamp-ons would be not far off in price from a stack of five or six
Tower work with nobody watching your six and nobody to call for help? Is it really a good idea? 73, Kelly ve4xt Sent from my iPad _______________________________________________ _____________________
Thanks for the link, Howard. Their prices are about $1 better than KF7P on the Mix 31 2.4 OD cores, and $2 worse than KF7P on the Mix 31 Biggest Clamp-ons ($16.95 at pro audio vs. 14.95 at KF7P). On
Given how much work and expense there might be in re-engineering the 50-foot Uni to 80-100 feet, are you maybe better off finding a use for the Uni at its design height and finding good, used Rohn fo
Sent from my iPad A 33-ish foot stub connected at about 64-66 feet? Might need more than one to decouple the top of the tower. Elsewise, it might read like a full-wl vertical (firing upwards). 73, ke
I'm wondering if Optibeam's design uses 1/4-wl 15 meter stubs mounted such that the open end of the stub is at a distance from the boom that is not a resonance point on 15. A 1/4 wl on 15 is just mor
Here's an interesting question: if the concrete base is an effective ground connection, do you get more value by placing the rods a rod length away from the base? If the idea of separation is to prev
It was intended to compare to the specific Moseley model, a disclaimer the author clearly makes. He didnt optimize the antenna because Moseley didnt, either. He also admits he ignored the other lumpe
I recall previously someone made mention of using multiple single-point grounds when dealing with distant towers: heavy grounding at the tower, with all shields and grounds grounded at the base (as w
The important thing to remember is electricity doesnt follow the shortest path somewhere, it follows the path of least resistance. And its important to point out that during a lightning event, that p
It seems as though their suggestion on using water pipe ignores that even in a frost-free zone such as Hawaii you would want those pipes buried enough to avoid incidental damage, which Im guessing is
For ground-laid radials, didn't Jim make the point that they serve primarily to shield the Earth from the antenna's RF? 73, kelly, ve4xt Sent from my iPhone __________________________________________
Hi Jim, Further to your tutorial, particularly the reference to inductance at a current peak, I note with interest a reference I remember from the manual for my old HF6V (the OPs antenna is the HF2V,
Courtesy Google Translate, it appears to simply be an outbound message saying the email address is no longer active. The moderator can easily fix. 73, kelly ve4xt ____________________________________
Isnt a lot of this talk a bit of picking the pepper? If joint conductivity of aluminum elements was a serious issue, wouldnt we have heard something about it in the, what, 60 years weve been using al