Brian Flynn GM8BJF will talk about Using Chinese ADF4351 and ADF5355 PLL Boards as Microwave Signal Sources at the next meeting. It will be held at 7:30 for 8:00pm at the Braid Hills Hotel. He writes:

"Recently PCBs have become available from different Chinese internet outlets which have Analog Devices ADF4350/1  ADF5355 PLL ICs on them. The ADF4351 boards are available for prices starting at about £30 and the ADF5355 about £55 which is about the one off price for the chips in the UK. The chips have Microwave VCOs incorporated in them. The ADF4351 covers 35 MHz to 4.4 GHz and the ADF5355 covers 54 MHz to 13.6 GHz. Clearly these are very useful as microwave signal sources for our purposes. They cover all of our bands up to 19 GHz and can be multiplied further to our higher bands. As always every silver lining has a cloud and this talk will address some of the issues in using these devices and how to get best performance they are capable of from them".

 

The LRS "Spring" Surplus Equipment Sale on 11th April at St Fillan's Church was well attended. Most of the items were sold, with 10% donation to club funds.

A moment of merriment in an otherwise serious evening! Full photo report.

 

(Photo of a similar installation)

John McCormick from Leonardo Airborne & Space Systems gave a talk about the Compact Antenna Test Range (CATR) at Crewe Toll, Edinburgh, at the meeting on 14th March. 

CATR is a dual-reflector test facility enclosed in a 24m x 14m x 8m anechoic chamber. It makes measurements of antenna performance from 500MHz to 40GHz.

Click for full Powerpoint presentation.

 

John McCormick

 

Paul at Dante's View, Black Mountains, CA.

We were delighted to welcome Paul Gacek W6PNG and his XYL from Laguna Beach, CA as the speaker at our meeting on 28th March 2018.  Paul is a SOTA friend of Andy MM0FMF to whom our thanks for arranging this talk. Originally from London, and now splitting his time between CA and Berwick-on-Tweed, Paul talked about "Wilderness radio in the Western US with an emphasis more on photos than any kind of tutorial" and showed many photos of the beautiful places he has operated from. Click for Paul's blog.

Click for Full report with photos. 

 

Allister Watson GM7RYR, who is beacon-keeper for GB7EE, talked about Digital Voice Modes at the meeting on 28th Feb 2018 at the Braid Hills Hotel. 

This talk looked at the different digital modes used on the VHF / UHF bands: D-Star, Fusion (C4FM) and DMR, the developments of the Local, National and International Networks and compared this with the state of the networks at the last talk given to the Lothians RS in February 2016. (Click)
 
There was a good turnout of 11 in spite of the blizzard blowing outside - "The Beast from the East"!
 
 Photos by Peter GM4DTH