Category Archives: K9ZW Uses

EZNEC Antenna Modeling for All of Us

I missed this while it was happening. I was looking to update my old software to model my new antenna configurations and found out about the change.

As Roy W7EL decided to retire, he made public his EZNEC antenna modeling software (compiled form only).

https://eznec.com/

There is also some neat stuff on NEC-5 end, where there is a collaborative update to the latest version (NEC5 X11) thanks to some great ham inputs! https://eznec.com/NEC-5.htm

The AC6LA add-on AutoEZ is something I plan to check out. https://eznec.com/AutoEZ.htm and https://ac6la.com/

AutoEZ is interesting as it an an Add-On to EZNEC which in also in essence an Add-On to NEC.  AutoEZ appears Excel-based, EZNEC is Visual Basic 6 (obsolete version) with some Fortran modules,  and the core NEC compiled Fortran (Intel Visual Fortran with the mkl math libraries).

Below the “–” line I will include some background from either Roy W7EL (website archived copy or QRZ.com) or a QSO Today Podcast interview he did with Eric 4Z1UG.

Well worth checking out all of these programs.

Also a series of dedicated books by ON5AU that should be considered if you are going to put EZNEC to work:

http://www.on5au.be/EZNECPro7.html

http://www.on5au.be/advanced_modeling_book.html

GL and 73

Steve
K9ZW

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Bespoke Morse Code Key Cover from Pete G0PNM

Morse Code Cover by Pete G0PNM with protective film

Wanting a dust cover for my key, I had been recommended those made by Pete G0PNM.

Took just a quick web search to get us in contact and get the ball rolling.

  • I inquired on February 1st 2022
  • Ordered, was customized with my call sign, and shipped airmail on February 2nd !!
  • Royal Post Air Mail, though a bit pricey, is often not very swift, and delivered to my PO Box on February 9th (Royal Post Costs added 34% to the all up cost of the cover)
  • Assembled any now protecting my key on February 11th.

Pete lives in a lovely part of Cornwall. I had the fortune to spend a month nearby on a work assignment, many years ago.

Here is a link to his YouTube on the covers and assembly: https://youtu.be/5BbVcqfjTFw

Pete G0PNM’s website link: http://www.g0pnm.uk/

Recommended!

73

Steve
K9ZW

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Little touches make a big different – Das Keyboard and KeyChron

Old enough to learn to type on some nondescript Smith-Corona in school. Then later Army trained on an IBM Selectric that I typed so many reports on that I can still feel the IBM keyboard under my fingers.

Computer keyboards I used were initially part of the machine or pretty much paired with a particular setup. The teletype keyboards of the first terminals, to various chunky keyboards designed by unemployed torture instrument designers, to various chicklet/membrane keyboards perhaps never intended for more than two minutes of steady typing when they were conceived.

Thinking who more than gamers to harshly evaluate keyboards? Informally surveyed several hams and several family who were gamers for their suggestions.

Lots of differing suggestions – learn Dvorak, go for an ergonomic design that looks like it came from Star Trek, try one of the battleship vintage keyboards, or have the early IBM unobtanium model xyz123 restored for me… lots of differing suggestions.

Commonality was found in looking for keyboards that use superior switches, as the switch is where much of the feel comes from, get one that is heavy enough to not move while typing, possibly remappable to allow PC/MAC & QWERTY/DVORAK changes, and has low latency, in many of the suggestions I received.

A few keyboards came an went, including a “Das Keyboard 4C TKL Wired Tenkeyless” which had such low contrast key labeling that it was exchanged.

Das Keyboard 4 Pro

Main keyboards both work and home, where I wanted the ten-key numeric pads ended up “Das Keyboard 4 Professional Wired Mechanical Keyboard, Cherry MX Brown Mechanical Switches, 2-Port USB 3.0 Hub, Volume Knob, Aluminum Top (104 Keys, Black)” and where I wanted the smaller ten-key less format (at the iMac mostly) as “Keychron K8 Tenkeyless Wireless Mechanical Keyboard for Mac, Hot-swappable RGB Backlight, Bluetooth, Multitasking, Type-C Wired Gaming Keyboard for Windows with Optical Brown Switch, Aluminum Frame.”

Keychron K8 TKL

The transition has been marvelous. These keyboards type like the Selectric I am used to, though with a slightly less of a key stroke. Having an extra USB hub on some of the keyboards is also a plus.

Good Stuff and Recommended!

(For links you can check Amazon, the direct Manufacturer’s Website or do a net search.)

73

Steve
K9ZW

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A change in Antenna Direction at K9ZW Home QTH

On my main Skyneedle was supposed to go a RadioWavz Barrett Hexbeam with Broadband option.  The antenna was bought about four years ago and health and then a home QTH move kept it from going up in the air.

RadioWavz built this antenna with the high power and heavy duty options, and it is purported to work as a rotatable dipole on 160/80/60/30m, a 2el wire beam on 40/6m and as a 3el(+) wire beam on 20/17/15/12/10m.  Original configuration was using three antenna drop feedlines, but two can be combined with a harness they offered.

RadioWavz helped me out sending new element guides made of metal which replaced the DOA original fiberglass guides, replacing most of the parts missing from the original antenna (though the spare parts ordered have never arrived) and sold me a upgraded support rope set made of a Kevlar type material.

In the antenna building process twice I have had damage from deer getting into the antenna.

First incursion pulled a number of elements loose and broke one of the smaller fiberglass arm pieces.  My calls and emails to RadioWavz had not been answered, when I figured out who supplied the fiberglass.  Ordered new fiberglass parts direct and made the repair.

Second deer incursion again pulled some elements loose but this time half of the 40m element with insulators and spacer cord went missing.  Presumption is it was caught on the deer’s rack and carried away until it could be shaken loose.  The wire element I can cut locally but as my spare parts supply of extra insulators and cordage was never shipped, I’ve had to have the special insulators locally fabricated and I’m scrounging for similar cord.  Again my emails and calls have not been answered by RadioWavz.

What I have learned is that the business was sold to the next generation, and the founders retired to another state, plus the next generation is up to their eyeballs dealing with a child’s severe health issues.

I get it.  Family is WAY more important, period.
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RBOG SOCKiT DRIBOX 200 Enclosures

The boxes arrived early and I swapped the temporary (and leaking/condensating) tubs for the SOCKiT DRiBOX 200’s I started discussing a few days back at:  https://k9zw.wordpress.com/2020/05/22/rbog-at-the-far-end-enclosure-solution-sockitbox-dribox-200/

Here is one as installed.

DRIBOX installed RBOG-Vee Array Leg 2

The boxes seem made well, and after a few months I will open them up check to check how things have gone.  The have a jelled-gasket, top & bottom, that seals around the wires.  I ran the ground out one end and the twin-conductor antenna wire out the other.

They are UV rated, but digging I cannot find out what that actually means.

There will be three tests coming up for these boxes:

  • Will they stay dry?
  • Will the UV wreck them?
  • Will they survive Winter’s cold and snows?

As the domestic market for these is the UK, and primary export market is Europe, they may be pushed a bit to survive what Wisconsin Weather can dish out.

More in about 6 months and a year.

73

Steve
K9ZW

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RBOG at the Far End – Enclosure Solution SOCKiTBOX DriBOX 200

Enclosures for electronics left in the open environment need to be weather-tight, waterproof, provide UV protection and provide some level of physical protection.

An RBOG (Reversible Beverage On Ground) antenna has a transformer at the far end of each leg of the array that needs protection.

A lot of hams improvise and I was eyeing some of the planter pots, which I though I could use inverted.

Then while I was out in the gardening shed looking for a pair for suitable flower pots, a deer went by, and then a woodchuck.

Pondering I thought my flower pot resting on wooden stand idea was likely to be upturned by the wildlife, and most likely would not be waterproof all year around.

So I started looking at commercial options and settled on the SOCKiTBOX DriBOX 200 as the solution I would try.

 

SOCKiTBOX DriBOX 200

SOCKiTBOX DriBOX 200 is the smallest of the offerings, and I truly hope the actual green is not quite as bright.

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