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Practical Electronics Editorial offices Practical Electronics Tel 01273 777619 Electron Publishing Limited Mob 07973 518682 1 Buckingham Road Fax 01202 843233 Brighton Email pe<at>electronpublishing.com East Sussex BN1 3RA Web www.electronpublishing.com Advertisement offices Practical Electronics Adverts Tel 01273 777619 1 Buckingham Road Mob 07973 518682 Brighton Email pe<at>electronpublishing.com East Sussex BN1 3RA Editor Matt Pulzer General Manager Louisa Pulzer Digital subscriptions Stewart Kearn Tel 01202 880299 Online Editor Alan Winstanley Web Systems Kris Thain Publisher Matt Pulzer Print subscriptions Practical Electronics Subscriptions PO Box 6337 Bournemouth BH1 9EH Tel 01202 087631 United Kingdom Email pesubs<at>selectps.com Technical enquiries We regret technical enquiries cannot be answered over the telephone. We are unable to offer any advice on the use, purchase, repair or modification of commercial equipment or the incorporation or modification of designs published in the magazine. We cannot provide data or answer queries on articles or projects that are more than five years old. Questions about articles or projects should be sent to the editor by email: pe<at>electronpublishing.com Projects and circuits All reasonable precautions are taken to ensure that the advice and data given to readers is reliable. We cannot, however, guarantee it and we cannot accept legal responsibility for it. A number of projects and circuits published in Practical Electronics employ voltages that can be lethal. You should not build, test, modify or renovate any item of mains-powered equipment unless you fully understand the safety aspects involved and you use an RCD (GFCI) adaptor. Volume 53. No. 1 January 2024 ISSN 2632 573X Editorial A big thank you to the PE writers! It’s the end/beginning of another year, and so it’s time for my annual salute to the PE contributors. I’ve said it many times before, and I’ll say it again, Practical Electronics is nothing without its magnificent writers. They work hard every month to bring you the best in original content. So – in absolutely no particular order – a great big ‘thank you’ to Alan Winstanley, Mike Tooley, Ian Bell, Mike Hibbett, Clive ‘Max’ Maxfield, Phil Boyce, Julian Edgar, Barry Fox, Jake Rothman, and new kid on the block, Robin Mitchell. Also, a well-earned round of applause for the hard-working ‘back-office boys’, Stewart Kearn, Alan Winstanley and Kris Thain, who keep the shop and website ticking over. Wireless for the Warrior Many of you have been asking when the quartet of Wireless for the Warrior books will be back in stock – well, the answer is right now. All four are available, but selling at quite a brisk trot. They really are unique books and the perfect gift for anyone fascinated by vintage military communications equipment. One important point for international purchasers – they have become very expensive to ship, so please send us an email before placing an order so that we can quote you the correct postage. The online shop cannot do that – it’s just too complicated to implement accurately. The perfect Christmas present! ‘What would you like for Christmas?’ We all dread that question. But lucky you – for PE readers the answer is easy – ‘I just want a subscription to my favourite magazine.’ You can choose paper or online, and as a subscriber you can be sure that you will never miss a copy. Component supplies Already subscribed? We are about to receive a huge pile of PCBs from the manufacturer, so if a design you’ve been keen to build has been ‘out of stock,’ then do visit the website. Advertisements From all of us at Practical Electronics, thank you for your support over 2023, have a very happy Christmas and a healthy 2024! We do not supply electronic components or kits for building the projects featured, these can be supplied by advertisers. We advise readers to check that all parts are still available before commencing any project in a back-dated issue. Although the proprietors and staff of Practical Electronics take reasonable precautions to protect the interests of readers by ensuring as far as practicable that advertisements are bona fide, the magazine and its publishers cannot give any undertakings in respect of statements or claims made by advertisers, whether these advertisements are printed as part of the magazine, or in inserts. The Publishers regret that under no circumstances will the magazine accept liability for non-receipt of goods ordered, or for late delivery, or for faults in manufacture. Matt Pulzer Publisher Transmitters/bugs/telephone equipment We advise readers that certain items of radio transmitting and telephone equipment which may be advertised in our pages cannot be legally used in the UK. Readers should check the law before buying any transmitting or telephone equipment, as a fine, confiscation of equipment and/or imprisonment can result from illegal use or ownership. The laws vary from country to country; readers should check local laws. Practical Electronics | January | 2024 7