The OEM incandescent lamp in a Daiwa SWR & Power meter which failed is being replaced with modern LEDs.
Five Philips heads screws, 2 on each side and one at the top are removed, and the meter’s top cover is … Read more...
In the Tokyo burbs, Akihabara, also known as “Electric Town”, is heaven for ham radio shopping.
This district is also a Mecca for all sorts of electronics, PCs and gadgets, and attracts tourist from all over.
Make sure you have … Read more...
For working satellites, horizontally polarised yagi antennas will be mounted on a non-conductive crossboom made of FRP (Fibreglass Reinforced Polymer).
A Yaesu G-800DXA azimuth rotator is already on station, so only a system to rotate elevation is required.
Elevation rotation … Read more...
In this video, Adam goes over the latest Nextion NX8048K050 (Enhanced 5.0″) firmware V2021-02-11-01 update for K3NG Rotator Controller.
Solutions to fix the crappy Yaesu G-5500 +13V rail voltage drop on its External Control connector are also offered.
[jwplayer mediaid=”14052″]… Read more...
A series of videos demonstrating the VK4GHZ Nextion for K3NG Rotator Controller
Part 1 – Basic Az system
Part 1 looks at a basic azimuth-only system and introduces you to some of the functionality offered.
[jwplayer mediaid=”13183″]
Part 2 … Read more...
An Eltek Flatpack2 HE 48V/2000W rectifier is being used as the power supply for a 23cm 600W LDMOS Power Amplifier project.
This touchscreen controller has been developed to control the Flatpack2 HE 48V/2000W, and display its data.
[jwplayer mediaid=”6445″ image=”https://vk4ghz.com/wordpress/wp-content/uploads/poster-1.jpg” … Read more...
A reliable 5V power supply is required to power a controller for an Eltek Flatpack2 48/2000 HE rectifier being used as the PSU for a future 23cm 600W LDMOS Power Amplifier project.
I have a fix for the Thunderbolt GPSDO date error!
The VK4GHZ Thunderbolt Display no longer uses the Year, Month and Day data fields sent from the Thunderbolt.
These date fields are no longer translated correctly inside the Thunderbolt since … Read more...
Doug, VK4OE, shows us some handy modifications to a 5/16″ combination spanner to make it more user friendly when dealing with SMA connectors in tight spaces.
[jwplayer mediaid=”5720″ image=”https://vk4ghz.com/wordpress/wp-content/uploads/Poster-SMA-Spanner.jpg”]
There are many ham radio orientated apps available from Google Play for your Android device, and I will be documenting a few of the apps I have found useful here.
Frequensee
https://play.google.com/store/apps/details?id=com.DanielBach.FrequenSee&hl=en
This is an audio spectrum analyser, acoustically coupled … Read more...
The idea of 2.4 GHz “shoot out” was raised with the VK4 microwavers present at the last 5.7 GHz shoot out.
Both myself and VK4EA did a site recce at the Murrenbong Scout Camp last weekend, and are happy to … Read more...
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...
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...
The DL2AM 10 GHz 10 Watt Power Amplifier arrived recently, and was “unboxed” today.
(Click on the pictures, to see them full-size)
Manufactured by Philipp Prinz, DL2AM, this requires;
My Kuhne 10 GHz … Read more...
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”]
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