It doesn’t get any simpler than this!
This interface uses the RTS and DTR signal lines from a cheap FTDI USB Serial Adapter, and provides isolated keying for both PTT and a CW key.
Problem!
The FTDI adapter provides … 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...
VK Logger Ham Radio Discussion Forum was established in 2006, and ran continuously until 2016.
Operation was suspended in 2016 due to a lack of activity, but “re-booted” in 2018.
It ceased operation in 2021 when it became obvious that … Read more...
Behringer X1222USB audio mixer Power Supply fails, again!
The SMPS modules fitted to these Behringer audio mixers are crap!
Fault symptoms include the appearance of no power to the mixer, except for the +48V LED being faintly lit when phantom … 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...
I recently purchased some of these low-cost 433 MHz SAW transmitter and receiver pairs for a current project.
The receivers work as advertised.
The transmitters?
Obviously dispatched from the factory, never tested, and without a QC inspection
How do … Read more...
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...
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...
Here is the official collection of VK9ML Mellish Reef DXpedition 2002 videos.
VK9ML Mellish Reef DXpedition – Part 1
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VK9ML Mellish Reef DXpedition – Part 2
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VK9ML Mellish Reef DXpedition – Part 3
[jwplayer … Read more...
Videos of some 3.4 GHz experiments.
First, the initial 3.4 GHz transverter receive test, placing a VK3XDK Signal Generator several streets away.
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3.4 & 2.4 GHz setup with VK4EA/P, January 2013 during the Summer Field Day.
[jwplayer … Read more...
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