LED RF-Field Strength Meter

This little project was originally developed by the Shefford & District Amateur Radio Society (SADARS) as a club project.
As I was looking for a simple device to measure RF-Fileds I decided to give it a try.
The original project site you will find in the link below. Kits are not available, but I found most of the parts flowing around my shack.
A big 'Thank you' to Stewart, G3RXQ for the link to the Analog Device sample page, it still works ;-)
Link to Shefford & District Amateur Radio Society (SADARS)

All elements on a breadboard PCB

Board with antenna

Display board

Wired display board

Display board with panel (I)

Display board with panel (II)

Fitted into box

Again, it's alive :-) Indicating the signal of my FT8 station

Component Tester, Kit by Funkamateur.de

Once again, the kit comes with all SMD-stuff in place, so you have to solder the display, one key, a connector , the test pad and the Lythium-Accu.
If you take your time, it will take less than 30 minutes to complete the kit following the step by step instruction manual.
Link to Funkamateur website

Unboxing the kit

All parts

Circut board with SMD components

Display installed

Other parts installed

Lithium-Accu in place

First boot test

It's alive :-) Message indicates no component to test found

Selftest and calibration

Fitted into box

First component tested

Correct result

Measurement different components:

Vector-Antenna-Analyser, Kit by Funkamateur.de

For my next project, building high power traps for a 20/40/60/80m trap-dipole, I needed a good tool for measuring the resonance frequencies.
In the German "Funkamateur" I found an offer for a Vector-Antenna-Analyser kit with a reasonable price tag, which should do the job.
The kit comes with all SMD-stuff in place, so you have to solder one switch, the display sockets, three keys, two battery holders and the BNC-socket.
If you take your time, it will take less than 60 minutes to complete the kit following the step by step instruction manual.
Link to Funkamateur website

Unboxing the kit

Soldering ON/OFF switch

Installed display sokets

Keys in place

The display

Battery holders and display

First boot test

Kit fitted into box

It live's :-)

SOL-Connectors

Calibrating

Messuring 60m dipol

Measurement examples of the HF-Antennas:

SWV 60m Dipole

SWV 160m HF2V

SWV 80m HF2V

SWV 40m HF2V

SWV HF2V 40/80/160m

SWV FB33 10/15/20m

SWV UFB13 12/17/30m

SWV 18m resonance at 18.387!

Eight channel remote relay card K8056 by Velleman

Building progress from soldering the smallest parts first until installing the relays last.

After doing some research I purchased two of these kits via Reichelt Electronics. The kits came with all parts complete and sorted.
There may be up to 255 boards with 8 relays each controlled by just ONE RS232 port, this should offer more than enough possibilities.
The building process was very straightforward and easily done within three hours of time for each kit. The step-by-step documentation is just perfect.
As the kit is designed to be run with 12V AC, I left the 1N4007 diodes D1-D4 out and included two wire bridges for D1 and D4 instead to run the boards direct from a 13,8V DC power supply.
Link to Velleman website

Soon to come.

Homebrew QRO-Antennaswitch

Rear view

Complete switch

Detail relais

Relais bank

Input/Tuner switch

Specifications:
- 1.5KW Switching on all HF bands + 50MHz using high current relays (HF92F-012D-2A, 12V DC, Switching 277V/30A/8310VA)
- Antenna 1 is default if no antenna is selected
- Possibility to switch Tuner in line
- Controlled by K8056 relay-card or manual antenna selection (Included in Powerswitch)
- Connected to Powerswitch control unit via simple 9-pair cable, only 13.8V on/off signals

Soon to come.