Tag Archives: K9ZW Shack

K9ZW Northern Station – The Tower and the Antennas

K9ZW Northern Station – The Tower and the Antennas

The Tri-EX/Tashjian TM-370HD Skyneedle is here at a friend’s trailer yard, where we will do some light refurbishment (scrape and paint some light tin parts that are showing surface rust) and fit the Alfa-SPID RAK Rotor, while we wait for the new base and a few added accessories to arrive.

Here are a few pictures of the tower being removed from storage and transported to my friend’s trucking yard:

Crane lift of the TM-370HD

Crane lift of the TM-370HD

TM370HD_Out_of_Storage_02

TM370HD_Out_of_Storage_03

A bit about the TM-370HD – this is a motorized 70 foot tubular tower that has some pretty impressive numbers.

I have a full set of engineering calculations and the wind loading they cite is roughly five times what my array will be, and perhaps 35 times the weight load is available.

Not certain if the numbers they provided are after application of the designer’s safety factor (would presume so, as they were done for code compliance rather than product engineering) so the ultimate wind loading and weight bearing is truly impressive.

Initially going up is a SP7IDX Hexbeam HD Mark II antenna currently in production, and a W9INN Half-Sloper which I had on the ready.

The Hexbeam will cover 6m to 20m and the Half-Sloper will carry onwards 20m to 160m.

I thought I had another Tennadyne T-8 antenna locally sourced, but the present owner decided he didn’t want to sell it even though he’d just advertised it. I’d been interested in having both the LPDA and Hexbeam up to do some A/B comparisons.

Karl and Norman at Tashjian Towers Corporation have been super as usual.

They have in production a new base for me, and I am adding the work platform (tower already has the ladder) which will allow me to do 98% of service work without a lift.

That the work platform will make an awesome birdwatching and other outdoor pursuit platform hasn’t escaped me either! It is quite likely that it will also open up a way for my getting very high speed internet to this QTH, as aDSL isn’t going to quite cut it for remoting a full Flex-6000 based station.

There are a lot of logistics to go – I have verbals from the professional help to get the base in and the tower up, and I have access to a DitchWitch to bury the conduits needed. ( want to run the power separately from the coax feeds and other control wiring.)

I even have some nice touches to add features, like a set of industrial/maritime intercom units so one will be at the tower and the other in the shack.

73

Steve
K9ZW

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A Northern Station for K9ZW

Having secured a long term QTH on Washington Island, Wisconsin (US Island WI-001L), I’ve started putting together a station.

Here is what is planned:

• Transceiver – Main – FlexRadio Systems Flex-6300 w/ATU
• Transceiver – Back-Up Unit – TenTec Paragon II
• Transceiver – Vintage Net – Collins KWM-2A
• Amplifier – Expert 1Kw Solid State
• Tuner – Palstar AT-Auto fully upgraded by Kessler Engineering
• Radio Computer – Custom Built Win7 “blade” (or possibly a Neal Campbell PC)
• Audio Gear – full set W2IHY gear
• Frequency Reference – Homebrew Rb-Source
• Tower – Tasjian TM370HD SkyNeedle
• Main Antenna – 20m through 6m – SP7IDX Hexbeam II HD
• Main Antenna – 160m through 20m – W9INN Half-Sloper
• Vertical Antenna – 80m through 10m – Gap Titan DX
• Rotor & Control – Alfa-SPID RAK with Prog1 Controller
• Antenna Switch – 4O3A Signature/Sky Sat 1A2R Switcher with PTT Router (TBD – under review)

I’ll use my usual BuryFlex Coax as supplied by DavisRF with N-Connectors as usual where possible.

The only items to acquire are the Antenna Switch, a Watt/SWR Meter, possibly a station microphone for the Flex-6300 and possibly a Neal Campbell FlexReady PC if I decide not to use the customer server style one I have.

The SkyNeedle, the HexBeam, the Collins Transceiver (with all the extra bits) and a second Palstar AT-Auto tuner were acquired for the new station; everything else came from my back up unit collection. The Expert Amp is coming out of my main shack as I will finally put in the Alpha-9500 that has been sitting in the box for a while.

I have power supplies and lightening arrestors to match my home QTH gear.

Down the road I will most likely add a 4O3A Signature Station Genius SSC-XL and replace the Flex-6300 with another Flex-6700 GPSDO/ATU transceiver to make the Northern QTH and Home QTH closer in design.

Eventually I would hope to share SmartSDR Radio “Slices” between the two QTH’s, with a long term goal of being able to remote one or both stations.

Now to get the Island QTH on the air while everything is put together, my SteppIR CrankIR Antenna with Flex-6300 setup, as used at Rocky Ridge Farm last year, will be pressed into action.

73

Steve
K9ZW

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Rack Mount – Preparing for the FlexRadio Systems Flex-6700

Search for a rack found either very rough gear, very dated gear (one which I will hopefully acquire for vintage gear later) or hugely expensive racks.

Bought an unused surplus odd comm’s rack – double-ended doghouse thing.  Wrong shape, but built like a tank.

Got my buddy Ray to cut in basically in half, moved wheels to the lower section, and reassemble with stiffeners.  Ray did this with a purposeful 2 inch set back on upper cube to make it more pleasing.

It is reinforced and now ready for gear

Lower will get shelves for amps, power supplies, and tuner.

Upper will get the Flex-6700, a rackable customer i7 Win7 computer, full W2IHY set up, Greenheron Rotor Control  and Array solutions PowerMaster SWR/Watts meter, Rb Frequency Reference, and Flex-5000 (possibly on top of the whole rack if I run out of room).

Looking at another rack I found for vintage/boatanchor gear (SP-600 and similar).

BTW the Collins S-Line Station will go on a desk – show-n-tell sort of thing.

Here is a sketch (click on it for a larger version):

K9ZW Main Rack

K9ZW Main Rack

Should work pretty good!

73

Steve
K9ZW

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Installing SlippNott Upgrades at K9ZW

The Tennadyne T-8 used two stainless u-bolts for attachment. In the highest of winds the large double booms of the Log Periodic antenna caught enough wind to slightly rotate on the mast.

To counteract this I decided to upgrade the T-8-to-Mast and Mast-to-Rotor connections with Tennadyne’s improved attachment method, the Tennadyne SlippNott.  (The much smaller T-28 Log Periodic doesn’t have enough surface area to need this upgrade.  U-bolts work perfectly fine for the smaller antenna.)

T-8 Original U-Bolt Clamp

T-8 Original U-Bolt Clamp

Another view of the original attachment. It had taken six years to pivot perhaps 10 degrees, though no matter how you look at it, it was moving even if very slowly.

T-8 Original U-Bolt Clamp

Original U-Bolt Clamp – Another View

The SlippNott retrofit upgrade uses two machined clamps with roughly one hundred time the surface contact area of the two u-bolts.

T-8 with SlippNott Retrofit

SlippNott Retrofit – another view

Another look at the retrofit in place.

T-8 with SlippNott Retrofit

T-8 with SlippNott Retrofit

I did the install from scaffold after lowering nd tipping over the whole tower.

Tower Access

Lower, Tilt and Scaffold

Also installed was a second SlippNott providing additional grip of the mast at the antenna rotator rotor unit.

SlippNott rotor installation

SlippNott rotor installation

This one was a fiddle to install given the restriction of the three nested tower sections.

Inside Nested Sections

Tight Quarters

Again it provides a huge increase in clamping action and limits the risk of the newly enhanced situation at the antenna twisting the whole mast in the rotor clamp.

Rotor SlippNott Installed

Rotor SlippNott Installed

A worthwhile project – wish the SlippNott was available when I put the tower and antennas up.

You can read more about them at the Tennadyne website – http://www.tennadyne.com

 

Direct link to the SlippNott page is http://www.tennadyne.com/slipp_nott.htm

73

Steve
K9ZW

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K9ZW 2013 Tower Repair Service List

When a complex project is undertaken, I find it a huge benefit to do a sort of checklist.

This way I get my thoughts down on paper and can mark off tasks as they are accomplished.

Linked as a pdf is my Summer 2013 Tower & Antenna Repair-Service List: K9ZW 2013 Tower Repair Service List

Once complete this part of my station should be in good shape for a few years.

73

Steve
K9ZW

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Putting it all on the Air – Pondering Station Design for K9ZW

Radio gear is like rabbits – when you are not looking they somehow seem to breed producing more (and more!).

Doing some sketching trying to work in a multi-station format into too small of a space and budget.

Minimally I would like to be able to switch easily between my present main Transceiver (Flex-5000A), the future Flex-6000 (which with its features is a bit trickier to configure into a multi-station configuration) and a “Guest Transceiver” position which will either be filled with vintage gear (the Swan/Dentron station or the Collins S-line Station) or a modern transceiver.

The plan is to use Julius W2IHY’s 3×1/1×4 Switchgear Combo as my solution.

http://www.w2ihy.com/one-3-x-1-controller-two-1-x-4-switches.html is the configuration I will start with.

Looking over Julius W2IHY’s new switch gear at Dayton it is obviously as rock solid as his audio products.  It is easy to admire the build and technical quality, as well as his W2IHY Dayton team.  Great product, great specifications and great people – quite a combination.

Julius was able to fix me up with 90% of what I wanted at the show, and within days of Dayton had dispatched the 3×1 Switch with Rack Mount Ears and a Cable needed to round out my configuration.

The attention to detail in his gear is impressive.  Much of the gear has two relay banks to select from – a high power relay for QRO use (I think I heard 5KW rated) and a high-speed reed relay for QSK & Digital use.  The end user can select between with internal jumpers.

Even the 1×4 boxes come in more than one pre-configuration depending on whether the desired state when a port is not selected is Grounded or Open.  My design needed one of each.  Again I understand I could have opened a box a reconfigured, but Julius has it covered from the get-go.

Julius was even so kind as to do a marked up custom Configuration Sheet for my shack – see: W2IHY Switch Gear Config for K9ZW  pdf data sheet.  Have a look and let me know what you think!

Amazing service!

On the Audio side I will be using Julius W2IHY’s 8-Band Equalizer/Noise-Gate, EQPlus Compressor/Downward-Expander and IPlus Audio Switch.

It may be a couple weeks until I have all the gear in place, and I’ll have a user’s setup report then.

73

Steve
K9ZW

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