VK - ZL DX
Expedition, February, 2018.
Gidday All,
this is a somewhat light hearted description of a recent
and somewhat unplanned DX Expedition to New Zealand's North
Island in February, 2018.
This article appeared in the recent DUBUS 1/2018.
JANUARY : PLANNING FOR NEW ZEALAND.
In early December 2017, my Wife was asked by her cycling friends
if she wanted to participate in a Cycling holiday around Nelson
on the South Island of New Zealand.
For my Wife, this was only a 5 Day Biking activity but I quickly
realized that it would be an excellent opportunity for me to
catch up with a few of the ZL "locals" with MM-Wave and
Microwave gear.
My aim with this DX Expedition proposal of taking Transverters
"across the pond" from VK to ZL was to hopefully inspire more
local ZL interest in our hobby of Amateur Radio.
And so I emailed a few of the more prominent Amateur Radio
enthusiasts on the North Island of NZ to check their potential
interest.
In Wellington there was Wayne - ZL2BKC and Mike - ZL2YET.
In Auckland there was Greg - ZL1GSG and Simon - ZL1SWW and way
up the North in Coopers Beach there was Stephen - ZL1TPH.
It was obvious by the responses from our ZL colleagues that they
were greatly interested in the potential of this somewhat
unexpected DX Expedition !!
Soon... my Airline Tickets, Accommodations and Hire Car were all
booked.
With less than 6 weeks before I departed VK... we then had to
decide which Bands we could realistically "activate" in
Wellington (the NZ Capital), Auckland and hopefully way up North
in Coopers Beach !
For my situation, with the benefit of previous overseas travel
to Friedrichshafen in Germany and surrounding countries for
Portable RF OP's with our OE friends, I had been progressively
developing a package of Transverter boxes +++ that could be
transported "relatively easily" overseas in my normal Check In
and Carry On luggage.
So, for the Microwave Bands, I now have one Transverter Box
which covers 8 Amateur Bands from 902 MHz through to 10 GHz,
delivering QRP of circa 100-200 Milliwatts on all frequencies.
It's small physical size is quite
impressive at only 23 x 21 x 11 Centimetres.
This Multiband Microwave Transverter uses multiple Switches to
"select" an operating frequency.
It uses a single ZL PLL (ZL2BKC), 2 Mixers
(VK3XDK), a mix of 144/432 MHz IF's and a series of Voltage
Controlled Amplifiers to optimise the LO and IF Injection Levels
for minimum undesirable Mixer products. The PA is a surplus
broadband .01-13 GHz, 100 Milliwatt Amplifier.
For the MM-Wave Bands, I have a single
Transverter Box which covers 24 GHz (80 mW), 47 GHz (24 mW), 76
GHz (3 mW) and 122 GHz (bare Mixer).
This hardware is 40 x 12 x 10 centimetres in size. The Box
splits into 2 halves.. each with a Switch settable ELCOM LO that
enables 24 GHz and 47 GHz from one half and 76/122 GHz from the
other half. The latter uses interchangeable DB6NT style Mixers.
The Microwave Box is free standing while the MM-Wave Transverter
“halves” are Tripod Mounted. Both are OCXO Locked with the DC
and IF Tx/Rx functions supplied via a small homebrew Multiverter
Controller powered from a single LIPO 4S Battery. This Battery
supplies multiple Inverters for the various DC supply rails and
has a Battery life of typically 2-3 hours.