Ham Radio Maker

Wednesday, 03 April 2019 19:00

Building an EU1KY Antenna Analyzer Featured

Written by
Rate this item
(0 votes)

So! I got my technician license April 2018 and wanted to get started in the amateur radio 2M band. Knowing that I would want to make a good antenna, I figured that I would need an antenna analyzer. I looked at the costs of analyzers on the market and decided to DIY. That’s when I found the EU1KY.

I assembled the analyzer using the required instructions for the EU1KY open source project (EU1KY wiki page) after ordering boards for the RF unit (I have extra boards for sale on my Ebay Site).

Note: The RF front end board mounts onto an 
STM32F746G-DISCO Development Board (available from Digikey.com for about $60). Under the connectors for the RF board there are some surface mounted jumpers. The board comes with them soldered onto SB3/SB5. Move them to SB1/SB4 and then check them for continuity. Check that SB3/SB5 are non-continuous.

Connect I, V and Gnd from RF board to blue audio on Discovery board like this.

For calibration, an Open/Short/Load (OSL) test kit is needed. I built mine from some spare SMA PCB board components. The 50 Ohm load has two 100 Ohm resistors in parallel and can be made more attractive by using 0805 SMD resistors. You could even do three 150 Ohm resistors in parallel to achieve the 50 Ohm target value.

Afterwards, I built a 2 meter ground plane antenna. 

Measurment

Used analyzer to scan 144Mhz – 148 Mhz …

The Results:

I welcome any discussion on this project. Just add comments below or email me at my arrl.net address (callsign ke0rje).

Read 2605 times Last modified on Saturday, 04 May 2019 12:24
Ron

Leave a comment

Make sure you enter all the required information, indicated by an asterisk (*). HTML code is not allowed.

BITX20@groups.io Feed

This group exists for constructors of the various BITX projects, to discuss all aspects of the design and construction including problems, components, modifications and experiences using the rigs.

 

Buy RF Front End Board Kit for EU1KY Antenna Analyzer

David Richards Blog

Dave Richards AA7EE

  • Rod KQ6F Has A New SW200 AM Processor For Sale
    Please note that the above photo is of my SW200, though Rod’s no doubt looks exactly the same.   A few months back, I received this note from Rod KQ6F – Hi Dave – I very much enjoyed your review on this product.  It was largely the reason I bought one.  My application is AM […]
  • Putting The HiFER “BRS” Boris Beacon On The Air – Finally!
    In this post from May of last year, I detailed the construction of a 1mW solar-powered HiFER beacon. I named it the Boris Beacon, in tribute to my neighbor’s cat. The beacon was never mounted permanently outside. I kept it indoors, powered from a small solar panel in the window, and feeding an “antenna” of […]
  • The C Crane Skywave SSB Portable Radio
    This will be a very brief post, and in no way constitutes a review. It’s barely even an “initial impressions” type of post. It’s just that I’ve been wanting a C Crane Skywave SSB for a while now, recently purchased one, and wanted to tell you! I’m sure many readers will identify with the search […]

Frequency VFO synthesizer Microb v.4

Frequency synthesizer Microb v.4 (Microb v.4S)

This looks pretty awesome. Might have to get one.

Manhatten Construction si5351 VFO by AA7EE

si5351 VFO by AA7EE

This si5351 Manhatten style constructed VFO is really slick

uBitx v5 Un-boxing