K9ZW Northern Island QTH .. First Steps

Have a lot going on putting the new Washington Island QTH together, with a TriEX Skyneedle waiting for a new base from Tasjian and other pieces starting to show up.

With the tower base I’d also ordered a work platform which will let me do most antenna work without a lift, and new coax standoff arms.

From the radio room to the tower base I have sourced enough Andrews 1/2″ Superflex HELIAX FSJ4-50B to ru two feeds and a separate feed to a vertical antenna.  This cable is very low loss, with amazing numbers like under 1 dB total attenuation per 150 ft feed line with working capacity in the 7 kW range!  Velocity factor is 81% for a fairly standard set of characteristics for calculating correct lengths to reduce unwanted electrical and RF characteristics.

The SP7IDX multiband Hexbeam is due in country in a few weeks, right on time.  The W9INN half-sloper is on hand and ready.

Intending to install a Zero-Five commercial grade flagpole multiband vertical antenna, which is especially cool as I really am keen to have a flagpole as well!! I’m going to start with 48 radials cut in sets of six per band.

Planning two KD9SV RBOG reversible on the ground beverage antennas. The pair of 180 foot long RBOG antennas installed in two directions will cover the four “Prime” directions (one NE/SW and the other NW/SE.). Gary KD9SV sells through DX Engineering and I think I have sourced a large roll of military surplus cable that should be a good match for the RBOG antennas. I hope to actually bury these receive antennas to keep them out of harm’s way. If the ends can come together, I already have buried feed lines from an old satellite internet installation.

I’ve bought a 25kW Lp-gas Kohler generator with automatic switchgear for a full site backup. With the power regularly interrupted or running off voltage on the island the plan will be to run all radio gear possible to run off DC from a battery farm and use the generator or mains power to recharge the batteries.

In the morning a local builder is visiting to review the plans for a garage, but I have changed my ideas to keep the operating station in the main house for the foreseeable future.

Another contractor is stopping by to look at road improvements and preparation for pouring various slabs.

Back to the tower the Heliax will terminate at a base of tower cabinet which is where antenna switches and lightening protection gear will also go. From the tower base box up to the antennas will go Davis RF’s BuryFlex cable, which is one I have had very good luck. A nominal 80ft of that coax plays the BuryFlex jumpers to get to the radios from the shack end Heliax termination will add up to on paper under 3 dB total losses.

Back at home the Alfa-SPID rotor should get mounted this week, and all touch up as well as a new Sheetmetal rotor cage cover will be ready before transport to the island.

A PC-on-a-USB-stick now has a nice 28 inch LED monitor, the combination which will initially drive the Flex-6300 Tranceiver.

Given my limited time on the Island and the late start I had, reality is I will be happy to have the tower and main antennas up before winter.

73

Steve
K9ZW

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