I haven't followed this closely. If you're looking for log periodic yagi that covers amateur frequencies I just happened to pick up a QST, June 2013, pg. 56 "Short Takes" column by Steve Ford, WB8IMY
I've been backpacking an Elk Antenna for 10 years! A number of years ago, I set up my Elk, on a shorty, table top camera tri-pod, on the top of Wheeler Peak (13, 063 feet) in Eastern Nevada, with a K
Nothing like a 13,000 ft tower to give a big signal. I've worked distances like that from a 3,000 ft peak with a TH-F6A on a rubber duck! 73, Jim K9YC _______________________________________________
Elk doesn't appear to offer a log-periodic: http://www.elkantennas.com/shop/ But their prices are competitive with Arrow. Thanks for the link - David KD4E I've been backpacking an Elk Antenna for 10
http://www.elkantennas.com/shop/ But their prices are competitive with Arrow. Each of the three antennas shown on that page is an LPDA, the first providing dual-band coverage and the others single-ba
David, My bad. Clearly a case of seeing what you want to see. Dual-band yagi, maybe, but a log covering 2m to 70 cm with 5 elements, hardly. I wonder if the math would work...there'd be pretty big ho
On 6/17/2014 10:35 PM, Kimo C Chun wrote: If you're looking for log periodic yagi that covers amateur frequencies I just happened to pick up a QST, June 2013, pg. 56 "Short Takes" column by Steve For
Please define "long". Which number of elements on VHF is considered adequate? 3-el 4-el 5-el 6-el 7-el Thing is, an LPDA pattern can be quite wide, as is a short yagi's. You need a long yagi to pinpo
Which number of elements on VHF is considered adequate? 3-el 4-el 5-el 6-el 7-el If an antnna is short enough to be easy to carry, it's probablly too short to nail down a source. That sounds flippant
Or... another possibility, though single-frequency, is a Moxon. There was an article in QST around 2001 for a 136-mhz receiver cum Moxon antenna unit specifically for RFI hunting. The beauty of the M
I've played with a couple of 3 element "noise locators" on VHF, both were useless, no directivity at all, OR, RFI was everywhere. Couldn't tell, went back to a vertical sense antenna and attenuator
I have a modified MFJ-856 which I found near useless out of the box. After modification it is better. It has a very deep, sharp null at 90 degrees (off the side) which is more useful for confirming a
There are disadvantages in using too high a frequency in trying to locate RFI sources. The RFI signal does not travel as far at UHF as it does in the VHF range. The power lines here are at the back
OK, good point. Is there any advantage to a simple yagi, quagi, quad, delta loop, or circular element beam - or will all perform about the same? Each form factor has an impact on convenience; e.g. we
That is what it looks like, although we might better say that the smaller antennas needed or present at higher frequencies intercept less energy due to their smaller size. This affects path loss, bec