Silicon ChipThe Fox Report - April 2023 SILICON CHIP
  1. Outer Front Cover
  2. Contents
  3. Subscriptions: PE Subscription
  4. Subscriptions
  5. Back Issues: Hare & Forbes Machineryhouse
  6. Publisher's Letter: Power!
  7. Feature: AI, Robots, Horticulture and Agriculture by Max the Magnificent
  8. Feature: The Fox Report by Barry Fox
  9. Feature: Net Work by Alan Winstanley
  10. Project: 500 WATTS POWER AMPLIFIER PART 1 by JOHN CLARKE
  11. Feature: Capacitor Discharge Welder by PHIL PROSSER
  12. Project: Amplififier Clipping Indicator by John Clarke
  13. Project: Three low-noise HF-UHF Amplififiers by Jim Rowe
  14. Feature: Circuit Surgery by Ian Bell
  15. Feature: AUDIO OUT by Jake Rothman
  16. Feature: Max’s Cool Beans by Max the Magnificent
  17. PCB Order Form
  18. Advertising Index

This is only a preview of the April 2023 issue of Practical Electronics.

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Articles in this series:
  • (November 2020)
  • Techno Talk (December 2020)
  • Techno Talk (January 2021)
  • Techno Talk (February 2021)
  • Techno Talk (March 2021)
  • Techno Talk (April 2021)
  • Techno Talk (May 2021)
  • Techno Talk (June 2021)
  • Techno Talk (July 2021)
  • Techno Talk (August 2021)
  • Techno Talk (September 2021)
  • Techno Talk (October 2021)
  • Techno Talk (November 2021)
  • Techno Talk (December 2021)
  • Communing with nature (January 2022)
  • Should we be worried? (February 2022)
  • How resilient is your lifeline? (March 2022)
  • Go eco, get ethical! (April 2022)
  • From nano to bio (May 2022)
  • Positivity follows the gloom (June 2022)
  • Mixed menu (July 2022)
  • Time for a total rethink? (August 2022)
  • What’s in a name? (September 2022)
  • Forget leaves on the line! (October 2022)
  • Giant Boost for Batteries (December 2022)
  • Raudive Voices Revisited (January 2023)
  • A thousand words (February 2023)
  • It’s handover time (March 2023)
  • AI, Robots, Horticulture and Agriculture (April 2023)
  • Prophecy can be perplexing (May 2023)
  • Technology comes in different shapes and sizes (June 2023)
  • AI and robots – what could possibly go wrong? (July 2023)
  • How long until we’re all out of work? (August 2023)
  • We both have truths, are mine the same as yours? (September 2023)
  • Holy Spheres, Batman! (October 2023)
  • Where’s my pneumatic car? (November 2023)
  • Good grief! (December 2023)
  • Cheeky chiplets (January 2024)
  • Cheeky chiplets (February 2024)
  • The Wibbly-Wobbly World of Quantum (March 2024)
  • Techno Talk - Wait! What? Really? (April 2024)
  • Techno Talk - One step closer to a dystopian abyss? (May 2024)
  • Techno Talk - Program that! (June 2024)
  • Techno Talk (July 2024)
  • Techno Talk - That makes so much sense! (August 2024)
  • Techno Talk - I don’t want to be a Norbert... (September 2024)
  • Techno Talk - Sticking the landing (October 2024)
  • Techno Talk (November 2024)
  • Techno Talk (December 2024)
  • Techno Talk (January 2025)
  • Techno Talk (February 2025)
  • Techno Talk (March 2025)
  • Techno Talk (April 2025)
  • Techno Talk (May 2025)
  • Techno Talk (June 2025)
The Fox Report Barry Fox’s technology column Hopeless helplines and NASty problems I n today’s endlessly ‘online’, never face-to-face world, too many helplines simply don’t help, using faceless staff who work from a script, filibustering with instructions to try irrelevant fixes. Sky’s the limit The last time I looked, Sky’s NowTV had still not solved the problem of some programmes stopping half-way through or failing to start after the adverts which paying subscribers are forced to watch – an annoyance which brings unhappy memories of retail DVDs which could not be fast-forwarded through the jungle of trailers, adverts and promotions embedded ahead of the programme. For many months, the adverts on Sky Now have been in audio-only. The screen only springs into life as the adverts end and the programme begins. I have greatly enjoyed not wasting my time on reporting this user-benefit fault. I’ll bet many others have happily not reported it either. Sky’s technical support either does not monitor its own NowTV service or is unable to fix faults. All in all, it’s a win-win for paying customers. Artificial unintelligence If only things worked like that with other services where the customer suffers from terrible help support. In my experience, NatWest bank’s Artificial Intelligence chatbot Cora is so Unintelligent that it fails to understand even the simplest customer question. I previously reported here on a gung-ho speech made by Dan Fahy of Paramount at the annual Digital TV Group conference, ahead of the Paramount + streaming service launch. Essentially, Fahy was promising Nirvana, and in good faith I quoted him. But when I later tried the service for myself it took a time-wasting trudge of 14 emails before the Paramount Help Line admitted what it should have been able to advise immediately; although Roku streaming devices work with Paramount, the device which Roku makes for Sky is designed not to work with Paramount. I’ve contacted Dan Fahy and Paramount (several times) to report what it’s like for real world customers to use Fahy’s help line. But no reply. With subscription service help lines the customer usually has the last word and final sanction – cancel the sub. The clear moral of any and all subscription service stories is don’t subscribe to any service for a year. Instead, start off opting for a week or month, until you know it works for you. Ideally take up an offer of a free period and really test it before paying a penny. 1555F IP68 sealed flanged enclosures Brainless bots The extent to which Help and Feedback services are now under unthinking bot control is nicely evidenced by the Microsoft system used to autovet comments on this news site: https://bit.ly/pe-ape23-msn I innocently tried to add a polite comment suggesting that Paramount should look at the quality of its Customer Support, and briefly noted my experience of 14 emails needed to answer a simple question. But all useful versions of the comment were repeatedly rejected with the error message ‘Does not meet The Microsoft Start Community Guidelines.’ Inquisitive readers may like to experiment with their own test messages designed to discover whether it is length, content or key word that makes the Microsoft computer say, ‘No’. NASty With expensive hardware, it may not be easy, or even possible, to get out of a deal. I’ll recount one story because the fix I found for myself, with next to no useful help from the company, has much broader value. IT company Terramaster specialises in NAS (Network Attached Storage) devices. I bought myself the solidly built, and attractively priced, twobay F2-210, built round an ARM w ! e n ze s si Learn more: hammfg.com/1555f Contact us to request a free evaluation sample. uksales<at>hammfg.com • 01256 812812 10 Practical Electronics | April | 2023 There’s no such thing as a free NAS. processor. I quickly found why it had been attractively priced; it was saddled with an out-dated Operating System (TOS Ver.4) that relied on obsolete Adobe Flash. Terramaster said it was developing an updated, Flash-free Operating System, TOS 5. But it would work only with Terramaster’s newer models such as the F2-221, which uses an Intel processor. The company, which is based in Shenzhen, Guangdong, China, and has no visible local Western contact points, offered to send me an F2-221 in return for my taking part in a Beta test on pre-release TOS 5. It sounded like a good trade, but I was soon reminded that there really is no such thing as a free lunch (or NAS). The NAS arrived, without any HDDs, so I had to go out and buy myself two 4TB drives. Various download versions of the TOS 5 Beta followed, thick and fast, and it quickly became apparent that the way Terramaster (and probably other Chinese companies) run Beta trials is very different from the way other IT companies run them. Beta testers are guinea pigs who devote man days to installing new versions, hitting multiple problems, describing them to the Chinese developer ‘Help Line’, getting back multiple and often offpoint suggestions on what to try, and then describing what did and didn’t work, until a new version is offered and the whole time-consuming cycle starts again. Obviously, what’s needed, but is missing, is a shared database showing what issues other testers have already found. Without information sharing, everyone wastes a shedload of time on describing duplicate discoveries. Eventually, TOS 5 limped from Beta to a series of official releases, Practical Electronics | April | 2023 with buggy versions quickly superseded by newer versions with fresh problems. The language barrier between English and Chinese repeatedly blocked useful help and support. I regularly took myself back to brownfield, by re-initialising the NAS with the recommended procedure – remove HDDs, run the maker’s initialisation App (TNAS-PC) on a PC and replace the NAS HDDs to trigger automatic download of a bootloader App. Obstacles abounded and with no real help from Terramaster’s Help, I discovered by tedious trial and error a trick which may well be more widely useful. Here it is. The trick Thanks to an industry-wide move from http to https IP addressing, browsers now often refuse to load pages and throw the error message ‘Not Secure’. This bedevilled the NAS set-up process. If you suffer from a similar affliction, with any procedure, try clicking on the Error display to ‘Turn on Warnings’. Then try again to load the page. After several tries (how many tries seems unpredictable) the browser may throw a different error which again warns that the IP is Not Secure but now gives the option to ‘Continue to Site’. Yippee. Unfortunately, this was only the start of the obstacle course. The HDDs for any NAS will need initialisation, which involves downloading the latest version of the NAS operating system (in this case TOS 5), formatting the HDDs, synchronising them for RAID working and creating a secure username and password with online registration. But mysteriously, the result may be a NAS which appears to have been successfully initialised but is in fact unable to store data, even its own name and password. Repeating the initialisation, any number of times, leads to the same failure. Terramaster Help was so totally stumped that they ended up sending me replacement hardware to try with my 4TB HDDs. The result was still the same; failure to retain data even after complete re-initialisation. Finally – and with no meaningful help from Terramaster Help – the penny dropped. Although the NAS was checking the HDDs every time it initialised them, and then going ahead and wiping them clean, the initialisation software was sniffing the relics of the previously created NAS proprietary file system and performing only minimal HDD checks. This is comparable to the difference between a PC performing a quick, simple disc format, and slow, full formatting. The simple disc check misses any embedded HDD corruption (perhaps caused by bad shutdown or power glitches) and thus skips some set-up steps. So, any corruption buried deep inside the disc structure remains intact. The simple (when you twig it) solution is to force the HDDs back to their ‘factory fresh’ state, with only unallocated space. This has to be done by physically removing the drives from the NAS, hooking them direct to a PC, by SATA lead or USB/HDD connector, and using a software tool such as Windows Disc Management App. This tool is well hidden behind: My Computer>Manage> Disc Management! When the HDDS have been totally wiped clean, with only unallocated space, any disc initialisation process starts from greenfield and fully re-formats the discs according to its own preferred file system. Main takeaways The lesson to be learned here extends far beyond a troublesome Terramaster NAS. If any HDD is giving inexplicable and persistent problems, even after supposedly complete re-initialisation, try returning it to factory-fresh state with only unallocated space. I tried sharing this fix with Terramaster and got back the ‘strong’ advice to replace the HDDs – which seems a very costly alternative to wiping them clean! I suspect the language barrier is at work here. Who am I to criticise Chinese IT Help engineers for having difficulty with my English? I don’t speak a word of Chinese. But, I don’t try and sell IT into China. Apart from the specific tech tip to try returning troublesome HDDs to factory fresh, unallocated state, the much broader lesson to be learned is that there are very real pitfalls in buying non-trivial IT direct from a Chinese company, with no UK subsidiary or agency to contact, and thus having to rely on Help from China. 11