Tag Archives: Tennadyne Anntennas

Beware the Winds – A Bit of Tower Mischief

A week or so back we had extraordinary winds. Steady 40 mph (65 kph) with 60+ mph gusts (100 kph) for a prolonged period. Local weather recording stations noted occasional gusts much stronger, though I cannot say if my QTH saw those mega-gusts.

Checking on the new log periodic it was still up there (yeah!) and all “looked okay.”

About a week later the beam’s SWR changed and then dropped off. I figured a feedline issue or perhaps a popped lightning arrestor given we had two periods of snowstorms with heaving lightning and thunder.

Yesterday the +4F (-16c) weather improved to a nicer +28F (-2c) and I walked some of our trails. One medium sized tree down that will have to be cleared with chainsaws, and everything looked pretty good.

Just one thing was working in the back of my mind. The log periodic wasn’t pointed in the direction I had left it. And it had moved since the previous day when I had looked at it from the workshop.

Feedlines are likely wrecked as the beam is drifting. My Skyneedle has an indirect rotator system where the rotator turns a jackshaft that is coupled to the mast with a heavy chain.

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Tennadyne and Cubex now under new ownership

Congratulations to Mark K5YAC, Tennadyne and Cubex antennas new owner!

Roger Greenfield WB8NDC had been looking to pass the baton as he and his XYL Nancy wanted to do retirement things.

It is awesome to see the transition completed.

You will be impressed with Mark K5YAC’s background. The http://www.tennadyne.com/about_Roger.htm page has been updated to Mark’s information.  Expect that link to be updates as Mark overhauls the company website.

Tennadyne’s updated phone is (918) 237-0844 and they haven’t posted their new Collinsville, Oklahoma mailing & physical address yet.  Mark’s QRZ page mentions FB and LinkedIn, so he may be putting information there.

73

Steve
K9ZW

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What Big Ears you have! – Being Heard – the All-FlexRadio (AFR) Station

I mentioned the great reports I was receiving with the AFR station (All-FlexRadio), and as being heard is the the easy part of making QSO’s, it seemed a good time to talk about the “Ears” of the AFR station.

There are two parts of most aspects of reception – hearing the raw signals and having a method to reduce the signal to a particular station which you want to make a QSO.

Across the panadaper SSB signal traces crowd the screen.  Use of the various signal processing settings mitigates some of the crowd, but there remains a lot of signals to pick through.

Think of this like going to a crowded party where everyone is talking.  There are so many simultaneous conversations that one has to concentrate and focus to pick out just one.  A hard of hearing person may hear only a fraction of the conversations, and because of their lower ability to hear also misses much of the general “conversation buzz” that good ears need to work to pick through.

The AFR station is good ears for sure.  And I need to carefully use the software tools and my own hearing processing to pick out stations.  The challenge is to focus in on just one station.

FlexRadio has a number of videos on how to manipulate SmartSDR to achieve optimal QSO rates.  As fair warning, if you want to simulate the deafness of legacy radios you will need to work harder at tweaking settings in SmartSDR.  Conversely if you want to have run rate with the leaders in the pack, your SmartSDR settings will be less intrusive.

One obvious factor in this listening part of the equation, is the great performance of the Tennadyne T-12 Log Periodic Antenna.

I can hear you now!

73

Steve
K9ZW

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Hard not to be excited about the new Tennadyne T-12Log Periodic Antenna

Tennadyne T-12 Antenna up at 76 ft on Skyneedle at K9ZW Main QTH

The Tennadyne T-12 is up at about 76 ft (23m) but I don’t have the rotator controller set up yet, so it is essential fixed.

Yet the performance already has me enthused!

First day running FT8 in the background (I was pretty busy, so I missed a lot of DX opportunities) netting a bunch of DX – over 40 DXCC entities in 165 QSOs!

In no particular order:

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Assembling Log Periodic Antennas – Part 2

Another big lift in the process of getting the HF log periodic antennas up. With much help from Vern K9EME, the T-12 is up and initial testing shows it’s performing very well.

There are a lot of steps to do in any antenna project, and this one was no exception.

I’m completing this post Sunday afternoon, as I have had enough feeding the mosquitos for a weekend.  Pictures with brief comments (and yes, the project is not done yet):

The Skyneedle has an offset rotator drive.

 

At the Skyneedle’s lowest elevation it is obvious a few more trees need to be cut back.

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Assembling Log Periodic Antennas – Part 1

Time to (finally) build the Log Periodic Antennas for the home QTH.

The big one is a Tennadyne T12.30-10HD – a twelve element 30 to 10 meter version.

Here is photo borrowed from the manufacturer’s website of a T12 on a tower (mine is going on a Skyneedle):

T12 from Tennadyne Website

Assembling has taken several after work sessions.  Here are some photos:

Boom parts as unboxed

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