The are a number of drone remote releases available. Given the small payload capacity of cheap drones the weight is critical for everything - line + release + sinker. The polyethylene woven fishing l
I'll second the success with the CSV19 tennis ball launcher. You won't need the top model for 60' trees but I do recommend the fishing archery spool option for paying out the line - very smooth and s
My 160m T tuner uses 3x Schrack PCB SPST relays. 900w FT8 and full QRO SSB. No problems in 4 years. 12vdc PCB relay by Schrack (RZ01-1A4-D012) with a plastic arm from the coil armature to the contact
I have tried most means for "line over branch" - slingshots with spinning reels, bow and arrow, arborist swing toss weights (that is a skill I don't have), fishing pole with sinker, tree climber, boo
I saw 8+ stations all calling VP8EME MANY times. So he was widely heard and here (Seattle) about -13. I only saw a couple of Q's completed, so you were not alone. I had worked him before and remember
Modeling I've done shows it a bad idea to have in ground and elevated radials connected together, but that is not clear from what you described. Then with the elevated separate, moving the feedpoint
Problem #1. The swr indicates about a 140Khz plus < 2:1 bandwidth (2 * 1880-1810) which implies a high radial resistance. Are the elevated radials fully insulated from trees, not contacting foliage,
Guy, I need some more db's on Tx. For Rx I hear much better than heard into EU from Seattle area. It's a hard path and easy to believe EU QRN/QRM is the main culprit. Your "loss list" is a great list
Al Christman K3LC thoroughly sliced and diced the tradeoffs of number vs length for given total wire investment is his Mar/Apr 2004 NCJ paper. N6LF also has a lot to say. Grant KZ1W I didnt think it
Likewise worked a bunch of JA's this am from Seattle, most were strong -5 to +3 on my Rx 4sq listening NW. Will try other directions. No Tx directivity here. No JA's on 1908 to start, but after a few
My experience with 142 wound on 240-31 cores would agree with Jim's experiment. NO problems after years in service. It is well known that TFE insulation is subject to creep - I've proved that in wire
Here is a app that gives distances and initial bearing for the great circle track from lat-lons. Of course that may be meaningless given prop. http://www.gpsvisualizer.com/calculators Grant KZ1W VE7X
I got as close as the Falklands on a small cruise ship and operated C6A/KZ1W/MM aboard ship. Here is a South pole view of where the rare dx are located around Antarctica. Inside the convergence zone
36 N-miles in 5.5 hrs = 6.5 kts pretty good to hold it that low if as reported 51 mph wind to 100 gusts. Enough speed to preserve steerage but as little as possible to minimize distance lost. Seems t
I lived on Mt Hamilton Road for 20 years, but that ended 8 years ago. I'm not aware of any hams further up Mt Hamilton than the Grandview restaurant and Three Springs Ranch development. There are two
I recently found Rudy N6LF article from ARRL Antenna Compendium Vol 6 re short 10' elevated top band radials. Resonated with a single loading coil, as short as 50' worked well, only down 0.5db from f
You don't mention how high you will be above sea level. Too high and the "L" gain & angle won't improve as much as within 1/2 WL and a few meters above sea level. So the 160L is ok at 80m from the ti
That statement doesn't agree with my quick modeling (I also wondered why my 40' base had some observed benefit on high bands now and then). Both a 60' for 160 and 40' for 80/40 worked fine. for a 60'
Here is what I used when I had the same problem 50kw line of sight 4 miles 1MHz. Expensive, but worked very well. http://herostechnology.co.uk/pages/RF_Filters.html Having the filter between rig and
As a minority report by one, IMO the simplest, smallest, cheapest, good RDF receive antenna is the DHDL. RDF around 9, pretty good for $20 of wire, one BN-73-202, one resistor, some string and two tr