W.I.A VHF/UHF Field Day Results

February 12, 2014 Adam 0

Results for the WIA VHF/UHF Field Day Summer 2014 contest have just been released.

I was amused (it doesn’t take much) to note that the Contest Manager did not quote the number of logs received, as in recent years.

To … Read more...

S/E QLD Microwave Activity Day, Jul 2013

February 6, 2014 Adam 0

Finally!
Presenting the VK4 Microwave Activity Day video for July 2013.

Thank you to all those who shot some video – without the efforts of these people – there would be absolutely NOTHING to watch!

A special acknowledgement to Peter, … Read more...

Microwave Antenna Mounting Schemes

January 28, 2014 Adam 0

Depending on the size and wind load of your antenna system, you may be able to get away with using tripods and mounting schemes intended for consumer grade video and still photography.

At right, you’ll see an example of 2.4 … Read more...

FT-7800R Programming Lead (CI-V adapter lead)

January 21, 2014 Adam 0

Yaesu FT-7800RThis article also applies to: Yaesu FT-7800, FT-7900, FT-8100, FT-8800, and FT-8900

Having just recently acquired a pair of Yaesu FT-7800R VHF/UHF Twinband transceivers, a programming cable was now needed.

Only after a few minutes searching, and we find warnings … Read more...

ThunderBolt GPSDO Rebuild

January 10, 2014 Adam 0

A Trimble ThunderBolt GPS Disciplined Oscillator (GPSDO) is the main 10 MHz station reference, and was originally built into a dual-band 2.4/3.4 GHz transverter system.

Now that a larger and more powerful 3.4 GHz PA module is to be installed … Read more...

3.4 GHz Power Amp upgrade

January 9, 2014 Adam 0

_DSC4432_webThe dual-band 2.4/3.4 GHz transverter system currently runs a Toshiba UM2784B Power Amplifier on 3.4 GHz, nominally 8 watts output, as seen on the right, mounted on a slab of copper with a heatsink. This unit is being removed.

A … Read more...

Lady Heather and ThunderBolt Display

November 11, 2013 Adam 0

Post by N1JR ยป 08 Jun 2012, 21:03

I sometimes use “Lady Heather” monitor software on my computer for my Thunderbolt.
I have noticed that when I do, after a while, Adam’s Thunderbolt Monitor stops reading the correct outputs, i.e. … Read more...

S/E QLD 10 GHz Activity Day, Oct 2013

October 29, 2013 Adam 0

Brisbane 10 GHz Activity Day, October 27, 2013

Iain, VK5ZD, is operating portable from the Gold Coast, whilst other stations are operating S/E QLD.

A fun MAD (Microwave Activity Day) on 10 GHz!

[jwplayer mediaid=”1330″ image=”http://vk4ghz.com/wordpress/wp-content/uploads/Poster-10G-MAD.jpg”]

Tech Talk: A Passion for Microwaves

September 25, 2013 Adam 0

Tech Talk at the Redcliffe & Districts Radio Club, September 16, 2013, “A passion for microwaves”, by Doug Friend, VK4OE.

Doug discusses some microwave history, and takes a look at how easy it is to get active on the microwave … Read more...

Toshiba 3.5 GHz 20W PA

September 13, 2013 Adam 0

Looking for some power on the 3400 MHz ham band?

Toshiba UM2683B 3.5 GHz power amplifiers are available on eBay from AECI South, that become a plug & play solution for 3.4 GHz.

Buy it now price ~ AUD$200 … Read more...

ThunderBolt Display documentation updated

September 10, 2013 Adam 0

ThunderBolt Display documentation has been updated to reflect the subtle changes of the V3 PCB.

Please note:

  • Alarm LED output polarity is different to the previous V1 and V2 PCBs
  • Pads for 5V output (for powering ThunderBolt Commander) is now
Read more...
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ThunderBolt Display now shipping

September 9, 2013 Adam 0

As of this afternoon, 25 of the batch of 50 units have already been paid for, 10 of which have now been posted overseas from orders received last week.
More being posted tomorrow.

The last 25 remain uncommitted.
First in, … Read more...