Cool, never seen one. A nice tool but probably $25k+. Another way I've used to install a 6000' long water line is to use a single blade ripper to pull 200' lengths of 1" PVC using a Kellems grip (Chi
The old portable marine RDF radios with a ferrite rod antenna would work well. Besides tuning the marine LF beacons many also covered BC and low MF bands. I tossed mine long ago, maybe there are some
I'm considering insulating elements on large yagis and would like to understand pro's and con's of various boom to element plate insulating materials - RF insulation, physical strength, creep, uv res
I put my DX Eng 4 sq right at a corner of my lot. A 4' ground rod only worked ok, but in a pretty wet area most of the year, so I added three 15 foot bare #14 Cu radials for drier times. Two along th
Pretty hard to find a box with the volume you need and already cut for outlets. What I do for large size line filters is use a plastic junction box from Home Depot (Carlon or Thomas & Betts). They co
With an insulated tower, the cheapest EZNEC and other free NECs will yield good results. Would you rather climb, cut, and trim a few times or spend $89 to get EZNEC? Simple to learn. And the demo ver
A nice tutorial about the what and why of line connected capacitors at http://www.justradios.com/safetytips.html Grant KZ1W There is a particular class of bypass capacitor required for the AC line, b
Adding on, 200Ksps to 1 Msps 8bit (and more) A/D convertors are good enough and cheap if one can store the data stream for a few seconds or so and the stations are time sync'd to record. Then correla
I would suspect that a DC HV line operator will pay A LOT of attention to any arcing from what I've seen of HV DC arcs. Once the ionization gets established and metal ions vaporized from the terminal
At TX5D (FO-A), I was able to instant A/B a 15m vertical (two elevated radials) at high tide line vs a crankIR tuned on 15m about 70' from high tide. US stations (5k to 7k km) reported 1 to 2 S unit
Rock ledges probably mean directional drilling would be prohibitively expensive. Even in soft soil it costs A LOT more than trenching. Same for a Ditch Witch over ledge even with carbide teeth, but y
I finally got around to some modeling and rereading of N6LF's work on elevated radials to respond to Jim's post. The comparison on 15m was being made between a crankIR on dry compacted sand about 70'
My 4 sq DXE exhibits similar "no directivity" at times. I think it is high angle signals. I did add three 20 foot radials to each antenna, I don't think it matters what the vertical element is, a lit
With 1/3 of the worlds hams in Japan (1.2M) as one mult and many EU countries with less 10k hams each as a mult the whole way most contests are scored makes no sense. Of course there is no perfectly
Since non plenum rated cables no longer meet codes, there is an opportunity to buy the NOS of it cheap on ebay. I've scored a couple of ebay 1000' spools of tinned double braid "rg59" Belden, 20 ga c
Since this thread continues, I thought I would share some EZNEC Pro/4 modeling results I have submitted for publication to QEX, with a focus on "verticals on the beach" for DXpeditions. EZNEC Pro4 ca
Per ARRL the K3LC NCJ work is "unobtanium". (WHY?) A Google search yielded nothing. If a member has pdf's of the articles or a link, forwarding them to me would be much appreciated. Grant KZ1W In the
The commercial grade protectors are quite a bit more sophisticated than the few small MOV's network in the small residential units. A look inside a Joslyn is instructive about what it probably *reall
I found NOS Soviet block screw mount micas on ebay that looked like they would handle QRO and have three pairs in series to cover the band with shorting relays - all shorted = 1820 then each step (2
Have you surveyed the site for HF RFI? One mountain top property I was considering had awesome 360d unlimited visibility but had so much power supply hash, PIM, intermod, etc. from comm installations