Not having any particular axe to grind, I'll pile on a bit with some comments. 1. The superhet/SDR vs direct sampling radio manufacturer and technology competition is and will continue to be very goo
Recently I put up a big new tower and a ground system for it and learned a few things. The actual ground conductivity is a bit of a mystery and highly variable over short distances, so I bought a cla
Yet another alternative is the coax cable bidirectional Beverage described by ON4UN (see fig 7-118 in the 5th edition). I've built a couple of them with ok results. Various small (cheap) coax can be
I rented the smallest walk behind trencher from the local Home Depot, it cuts about a 2" wide trench and will go down at least 12". By not getting close to tree trunks to avoid any large roots and to
...snip.. That aside, every good pile-up, DX and contest op I know dislikes the use of any self assigned indicator, including /QRP. It s l o w s things down and can easily create confusion, busted c
see N6LF's work on 160m top hats http://rudys.typepad.com/files/qex-short-verticals-for-160m.pdf My guess is that informed the DXE design. Grant KZ1W http://www.dxengineering.com/parts/dxe-160va-1?se
Rudy N6LF has covered the top loading issues pretty thoroughly, see http://rudys.typepad.com/files/qex-short-verticals-for-160m.pdf Bottom line IMO: install as many top loading wires as you can as ho
A lengthy thread re grounding on towertalk prompts me to have concerns about protection of my T top (85' to top plus two 33' top wires) wire 160m vertical with eight 125' elevated radials. Since that
I did some modeling of radials with elevated radials after 3 "on the beach" DXpeditions. QST said they will publish it this year, sometime. Rudy N6LF has done a lot of modeling of elevated radials se
I cut my top loaded "T" (85' at top, 10' high feed, elevated 8x 125' radials) for 1825. Then 3 equal value series capacitors are shorted by PCB relays (10a, 5Kv coil insulation) to switch in C, C/2,
I was a participant in this years CQ-160-SSB. Maybe some data helps the discussion. I was a bit surprised to hear others using frequencies below 1820 as a run freq. My recollection from very limited
I've had two verticals on galvanized metal roofs. An 80m top loaded 40' 3" irrigation pipe on a two pitch steep barn roof about 30 x 60' and a full size 1/4wl 40m on a essentially flat roof shed 26 x
I have one from Heros Technology in UK, bought 12 years ago, they are still in business and have some interesting products. I checked the filter yesterday with my VNWA and it is exactly as advertised
Great presentation! It inspires a question about detuning a vertical: The goal is to reduce noise and any pattern distortion in my receive 4 sq (DXEng) which is about 200' from my transmit vertical.
Good recommendations. I did a couple of things differently for my 160 T hung to 3 trees, I use Lewmar or Ronstan or Harken small swivel blocks, cheaper, more durable in tough environments and the swi
My 2c, having owned MFJ269, AIM4170, VNWA2.3 & 3, AA54, SARK110, old noise bridges, and used a friends FG-01 on a DXpedition. The MFJ is old, not all that accurate and really useless in the presence
I have a Bliss MatchMaster remote tuner I can part with and about 150' of control cable with mil-spec connectors. At the time this was the best remote tuner in the market, custom made for each custom
I've been using PB Blaster penetrating oil with good success. Since you know there are Penetrox particles (it is zinc dust plus castor oil per the MSDS) between the tubes, I'd try to wick some PB in
One thing that W8JI clarified for me in winding binocular cores is what is a "turn". Normally, a wire thru a toroid hole is a "turn". A binocular core is two toroids in a single piece of ferrite. Tom
From a coil loaded 80m 2L yagi (bought JKantennas) and 80m rotatable dipole I built and reading here are some thoughts. My rotatable 80m Tornado loaded 86' dipole at 100' doesn't have much of a patte