Icom’s IC-9700 has been favorably received by consumers, except for the half-baked 10 MHz “Reference” locking scheme. 
It was thoughtful of Icom to provide an SMA jack on the rear panel for an external 10 MHz “reference” source, but this … 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 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...
Icom IC-910H, comes with the following:
• UX-910 23cm 10W module
• CR-293 High Stability unit
• UT-106 DSP unit
• MB-23 Carry handle
• HM-36 Up/down mic
• Original Carton
• Original schematics & block diagrams
• … Read more...
Based on the highly regarded PE1RKI power amplifier module, this is a fully assembled and tested – ready to use – 150 watt 1296 MHz power amplifier being offered for sale.
Ideal with Icom IC-910 10W class transceiver.
Features:
• … Read more...
My 20 year old Diamond X-500 2/70 antenna stopped working earlier this year.
Not wanting to muck around, I simply ordered a new X-700 from Strictly Ham the following day.
I thought 20 years was a great run for an … Read more...
PICAXE .bas files have now been added to the main article.
Full details on how to upgrade your VK4GHZ Thunderbolt Display, and ThunderBolt Commander can be found at:
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...
This simple modification replaces the standard rocker switch with an illuminated type rocker switch that is a drop-in replacement.
One annoying thing about the Weller WTCPT soldering iron is, there is no in-your-face indication it’s on, and it’s easy to … 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”]
I was curious about how much bigger a 3.3 GHz cloverleaf antenna would be, compared to a 5.8 GHz antenna, to see if it was a viable alternative for FPV downlinks on 250 class mini quad.
So, I converted a … 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...
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...
Looking for a 1296 MHz (23cm) Power Amplifier?
After discounting a W6PQL based kit, a PE1RKI 23cm 150W Power Amplifier was decided upon.
Like the W6PQL design, the PE1RKI (Bert Modderman) amp uses a pair of XRF-286 transistors, but comes … Read more...
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