## How to calculate distance between two points using latitude and longitude

This post shows the step by step process of calculating the distance as the crow flies between two points using latitude and longitude of both points. I have used this calculation in logging software I have been continuously developing the last three years.

## How to convert Maidenhead Locator to Latitude and Longitude

This post shows the step by step process of decoding a Maidenhead locator code to calculate the latitude and longitude at the centre of a square. I have used this calculation in logging software I have been continuously developing the last three years.

## Solent 1.3GHz / 23cm Amateur Television Transmitter

Last year I purchased a Solent 23cm Amateur Television (ATV) transmitter. Although working, it needed a bit of a tidy up. Whilst tidying things up I decided to make a few modifications and place the transmitter in a new case too.

Click the continue button to see more.

## 144MHz UKAC contest – 5th February 2019

Tonight I took part in 144MHz UKAC contest (AR category) using my Yaesu FT-736R transceiver (25w), EA270ZB13 2m / 70cm Yagi made by EAntenna. The antenna is 5 elements on 2m (10.8 dBi) and 8 elements on 70cm (11 dBi).

With the mast at full height, my antenna is 220ft ASL.

## 70cm UKAC contest – 8th January 2019

Tonight I took part in UKAC contest (AR category) using my Yaesu FT-736R transceiver (25w), EA270ZB13 2m / 70cm Yagi made by EAntenna. The antenna is 5 elements on 2m (10.8 dBi) and 8 elements on 70cm (11 dBi).

With the mast at full height, my antenna is 220ft ASL.

## Comtech 23cm Amateur Television (ATV) rotary LCD tuner using Arduino

In October 2018 I started using a Comtech 23cm transmitter for my ATV operations. Rather than use the 8-way dip switches to tune the transmitter, I decided to work on a project to develop a rotary LCD tuner using an Arduino Uno as the micro-controller. This article shows how I did it, including the code.

## Comtech 23cm ATV transmitter modification – replace voltage regulator

For 23cm Amateur TeleVision (ATV) I am using a Comtech 23cm transmitter powered by a 13.8V power supply.

## M0NWK Amateur Television ATV Test Cards

I made these test cards for my Amateur Television (ATV) station on 11th October 2018 using Adobe Photoshop and Camtasia Studio 2018.

## 70cm UKAC contest – 11th September 2018

Back in May I installed my Tennamast and dual band EA270ZB13 2m / 70cm Yagi made by EAntenna. The antenna is 5 elements on 2m (10.8 dBi) and 8 elements on 70cm (11 dBi).

With the mast at full height, my antenna is 171ft ASL. Tonight I took part in my first ever UKAC 70cm SSB contest.

## Technique for etching PCB Using Press-n-Peel Film

On 19th January 2017,  I started the process of making a printed circuit board for my 23cm amplifier project. I was extremely pleased with the results so thought I would write an article  and make a video that shows how I did it.