Model Engineer & Workshop Magazine | Site-Wide Activity https://www.model-engineer.co.uk/activity/ Activity feed for the entire site. Sun, 28 Jun 2026 03:20:04 +0100 https://buddypress.org/?v= en-GB 30 hourly 2 24624e31219c99645c32a0213d185c50 duncan webster 1 replied to the topic Hereward in the forum Model Boats https://www.model-engineer.co.uk/forums/topic/hereward/#post-853778 Sat, 27 Jun 2026 23:06:50 +0100 Brilliant! I wish I could get anywhere near that level.

Does anyone still supply the Maxwell Hemmens stuff? That engine is proper nice.

]]> 1b41ecd95bfe9faab6710a16d3565e6b Paul Lousick replied to the topic Drawer Front Attachment in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/drawer-front-attachment/#post-853777 Sat, 27 Jun 2026 22:59:31 +0100 Ebay sell cam and dowel furniture fittings

]]> cba39cd40b8b5bd79f156a7b8b727940 Mark Rand replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853774 Sat, 27 Jun 2026 21:45:58 +0100 I’ve made my position clear in (too?) many posts on similar threads. But for information:-

  1. If you are worried about the insulation condition of an old motor and want/need to run it with an inverter; These folk make and sell L-C filters. They even publish the technical details so you can brew your own if you can get your own inductors and…

[Read more]

]]> ade7f1b76f554af12b274a89dfc862b5 Bazyle replied to the topic Taylor Hobson’Trutaper’ mystery solved [?] in the forum Workshop Tools and Tooling https://www.model-engineer.co.uk/forums/topic/taylor-hobsontrutaper-mystery-solved/#post-853773 Sat, 27 Jun 2026 21:34:46 +0100 A few years ago on an unrelated forum there was a particular measurement accurate to a tenth thou we were trying to understand and many weird theories sort of fitted the numbers. I expected it to be a round figure something like cosine(13) from memory but no end of fiddling in Excel would give me that round figure. However then I realised that as…[Read more]

]]> 6fc85f5b0256086401ef536b57ee1ed0 Nigel Graham 2 replied to the topic Hereward in the forum Model Boats https://www.model-engineer.co.uk/forums/topic/hereward/#post-853772 Sat, 27 Jun 2026 21:14:28 +0100 Beautiful! Thankyou for showing us!

]]> 7d6c7f04e6176aad4d99caca4758e42d Michael Gilligan replied to the topic Taylor Hobson’Trutaper’ mystery solved [?] in the forum Workshop Tools and Tooling https://www.model-engineer.co.uk/forums/topic/taylor-hobsontrutaper-mystery-solved/#post-853771 Sat, 27 Jun 2026 21:12:34 +0100 Yes, Nigel … in the sense that it’s one that can be quickly and accurately set, using Jo blocks or whatever.

MichaelG.

]]> 5cce6c4c1f6f3cfe520a08be89970f8c Nigel Graham 2 replied to the topic Taylor Hobson’Trutaper’ mystery solved [?] in the forum Workshop Tools and Tooling https://www.model-engineer.co.uk/forums/topic/taylor-hobsontrutaper-mystery-solved/#post-853770 Sat, 27 Jun 2026 21:07:36 +0100 That’s a “neat” ratio?

]]> 6ded3b35bf3ee9659a19ed451776ebb3 Michael Gilligan started the topic Taylor Hobson’Trutaper’ mystery solved [?] in the forum Workshop Tools and Tooling https://www.model-engineer.co.uk/forums/topic/taylor-hobsontrutaper-mystery-solved/ Sat, 27 Jun 2026 20:44:57 +0100 The exact value 2.143° corresponds almost exactly to a taper of 1:13.333 on diameter (3/40), which is the sort of neat fractional ratio an engineer might deliberately choose.

]]> 84df2561ed1f4fbb604c9daf3e748702 Paul McDonough replied to the topic 3 1/2" Gauge Discussion Group in the forum General Questions https://www.model-engineer.co.uk/forums/topic/3-1-2-gauge-discussion-group/page/3/#post-853761 Sat, 27 Jun 2026 19:08:32 +0100 There is another reason for sticking with 3 1/2” gauge id struggle to machine wheels on a 5” gauge loco

]]> c829f92b398c1a7c0f25feb57d301be0 Mark Easingwood replied to the topic Drawer Front Attachment in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/drawer-front-attachment/#post-853760 Sat, 27 Jun 2026 19:05:18 +0100 What Jason said, but be aware that the dowels come in different lengths, and the cams in different lengths, diameters and with or without a rim.

 

]]> 3afd46f9b53d5fc1e1b0e48a5201f846 Speedy Builder5 replied to the topic Drawer Front Attachment in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/drawer-front-attachment/#post-853758 Sat, 27 Jun 2026 18:30:18 +0100 Same as our Ikea cupboards etc. Our are still ok after 20 years of use.  They are pretty standard, have you tried your local DIY superstore ??

]]> adf1618eb63ed6069a77bb7168d07e0f JasonB replied to the topic Drawer Front Attachment in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/drawer-front-attachment/#post-853757 Sat, 27 Jun 2026 18:29:32 +0100 Cam & Dowel KD Furniture Fixing will get you them

]]> d50c6c60b77562e0e3b41d5e1954960e Clive Brown 1 started the topic Drawer Front Attachment in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/drawer-front-attachment/ Sat, 27 Jun 2026 18:24:27 +0100 The 2 fasteners on one of our kitchen drawer fronts have broken, as per picture.I’ve tried an internet search for replacements, with no success. Can anyone suggest a search name that might bear fruit. The stem is about 45mm in length.  PXL_20260627_181325220TIA

]]> 3a56e9386101dccc0e6fbf4ccf52d831 Pippin replied to the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/#post-853752 Sat, 27 Jun 2026 17:27:59 +0100 Thankyou all. Quite amazed how little it needs, so stuff rusted just from me using the same nitrile gloves I’d used for the soldering.

]]> d0e3c0d0a6661a91ef501b91a4f75693 jaCK Hobson replied to the topic Hereward in the forum Model Boats https://www.model-engineer.co.uk/forums/topic/hereward/#post-853751 Sat, 27 Jun 2026 16:37:49 +0100 Wow. Excellent. And really nice writeup. Thanks

]]> fa3512b1e0bfd291cec75dfc1a9016b3 Howard Lewis replied to the topic Hereward in the forum Model Boats https://www.model-engineer.co.uk/forums/topic/hereward/#post-853750 Sat, 27 Jun 2026 16:01:12 +0100 Excellent work!

Thank you for describing and showing it to us.

Howard

]]> 19deb92360468f1876ae10e5586734a1 Howard Lewis replied to the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/#post-853749 Sat, 27 Jun 2026 15:20:05 +0100 Bakers Soldering Flux, as Neil says, is a mixture of acidic chlorides (Mosrly Zinc dissolved in Hydrochloric acid)  So needs to washed off IMMEDIATELY after soldering is completed.

Being acidic, an alkaline solution will neatutralise it, but don’t go mad with caustic soda, or you’ll exchange one chemical corrosion problem with another!

Lots of…[Read more]

]]> 83e36cfcae55e065f350669088cb3cce Phil Whitley replied to the topic My week this week! My workshop videos in the forum The Tea Room https://www.model-engineer.co.uk/forums/topic/my-week-this-week-my-workshop-videos/page/13/#post-853746 Sat, 27 Jun 2026 15:09:27 +0100 Hi Folks,
We got some field work in before it got to hot, and then Andy arrived Thursday with his usual batch of antique repairs including some lathe and milling work, and some unfeasibly small mig welding that worked a treat!
Phil in super scorchio East Yorkshire!

]]> 0861092f2f63f426a62bd6ebc41e98d9 SillyOldDuffer replied to the topic Unusual opto fork setup in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/unusual-opto-fork-setup/#post-853745 Sat, 27 Jun 2026 15:05:03 +0100 My guess is the circuit adjusts for ambient light so the mechanism isn’t confused by bright moonlight or changing cloud cover.  Automatic if done by the microcontroller and a sensor, or manual via a control panel, and both could be available.

Might be a LED corrector as John suggests though my experience of electronics is that designers don’t…[Read more]

]]> 5f60b752de17e40a56886c4385fe10ec Dalboy replied to the topic 3 1/2" Gauge Discussion Group in the forum General Questions https://www.model-engineer.co.uk/forums/topic/3-1-2-gauge-discussion-group/page/3/#post-853741 Sat, 27 Jun 2026 15:02:30 +0100 Like some I went for 3 1/2″ gauge as lifting and moving larger models could be a pain in the rear quarters for my.

I am at present building the Rob Roy which I am posting on here.

]]> 22c1fb0362c4e349d15f4dbc4e7f7e97 Howard Lewis replied to the topic Introducing myself in the forum Introduce Yourself - New members start here! https://www.model-engineer.co.uk/forums/topic/__trashed-2/#post-853738 Sat, 27 Jun 2026 14:56:53 +0100 Welcome to the Forum.

You will always find help and advice on here, if you feel that you need it.

There is a vast anount of experience on here about all facets of model engineering in all its forms.

Howard

]]> 2931f66535f454eeb82f6445aba668ce George Jervis posted a new Ad Sharp universal milling machine. https://www.model-engineer.co.uk/activity/p/79577/ Sat, 27 Jun 2026 14:55:25 +0100 Hi I have my sharp universal milling machine in fairly condition, it comes with a 3 phase and a single […]

]]> 0 ae619efc5c8a6f984142505942fcef5a jamessm34 replied to the topic ML7 help please! in the forum General Questions https://www.model-engineer.co.uk/forums/topic/ml7-help-please/#post-853730 Sat, 27 Jun 2026 14:40:08 +0100 It might be worth checking whether that fastener is actually a grub screw rather than a Woodruff key. On older machines it’s not uncommon for covers to be held by a hidden grub screw that’s packed with years of oil and swarf, making it hard to identify. https://puningroup.com/vacancy/cosmetologist/

I’d also avoid forcing the guard until you’re…[Read more]

]]> a4c36d792538d7f3cc518b1a7cced735 jamessm34 replied to the topic 3 1/2" Gauge Discussion Group in the forum General Questions https://www.model-engineer.co.uk/forums/topic/3-1-2-gauge-discussion-group/page/3/#post-853726 Sat, 27 Jun 2026 14:38:26 +0100 I think 3½” gauge deserves more attention than it gets. It seems like a great compromise between portability, cost, and actually being able to haul passengers, especially for people who don’t have the space or equipment for larger gauges.

I’d definitely enjoy seeing more build logs, photos, and practical discussions here. A dedicated community…[Read more]

]]> 21a1453f718b66a87b790a1e07f80164 jamessm34 replied to the topic Price of A Mk2 Clarkson cutter grinder. in the forum General Questions https://www.model-engineer.co.uk/forums/topic/price-of-a-mk2-clarkson-cutter-grinder/#post-853720 Sat, 27 Jun 2026 13:57:10 +0100 I’ve noticed that happen quite a bit with specialist machinery. Sometimes sellers list the same item on multiple platforms with different prices to account for fees, while other times they simply forget to update one of the listings.

If I saw three different prices for the same machine, I’d probably assume the lowest one was the realistic asking…[Read more]

]]> 31a5926bc95c258fd92370f950e1752e SillyOldDuffer replied to the topic Running 380V 3-phase motor on 230V 1-phase in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/running-380v-3-phase-motor-on-230v-1-phase/page/2/#post-853715 Sat, 27 Jun 2026 13:39:56 +0100

On 23 June 2026 at 10:45 Bob Worsley Said:
One of the requirements for being a moderator is knowing about things, and unfortunately SoD doesn’t know about the capacitor 3 phase motor converter and how it works,

I’ll ignore the ignorant abuse – it’s too hot!  But watch out Bob – you’ve become a repeat offender and I have my Moderator Hat on.  Cod…[Read more]

]]> 3ff40c776ae7d14eb078a58f7ccf2ab1 Robert Atkinson 2 replied to the topic Running 380V 3-phase motor on 230V 1-phase in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/running-380v-3-phase-motor-on-230v-1-phase/page/2/#post-853709 Sat, 27 Jun 2026 13:29:18 +0100 Lets start with the easy one first:

Aircraft 3 phase supplies do not have one phase grounded. Aircraft generators are star connected with the star point (neutral) connected to the airframe (ground). Voltage is nominally 115V neutral to phase and thus 200V phase to phase. Frequency is nominally 400Hz. This requires a constant speed drive so there…[Read more]

]]> 6ee157372ae7e97de9baa0db95405619 alecs replied to the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/#post-853708 Sat, 27 Jun 2026 12:28:13 +0100 Ive always used bicarb soda solution then washed that off with soapy water.

]]> 1553f601793cc1cc711e1366f936a6b7 Robert Atkinson 2 replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853705 Sat, 27 Jun 2026 12:26:57 +0100 Julie beat me to it. I was trying to stay away from the details.
I’m biting my tongue on a couple of comments….

Robert.

]]> b9b218d34ccccc37777226f463f75025 Dell replied to the topic Oiling Lathe Ways in the forum Beginners questions https://www.model-engineer.co.uk/forums/topic/oiling-lathe-ways/#post-853701 Sat, 27 Jun 2026 12:26:02 +0100 I have added felt soaked in oil so everything gets oil all the time

]]> e6238b045dda0d3e3b395733ed6520e8 Neil Wyatt replied to the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/#post-853700 Sat, 27 Jun 2026 12:21:07 +0100 It’s a mixture of highly aggressive chlorides. There’s no real neutraliser, the best you can do is wash it off immediately with warm water, wash it off again, and then wash it off once more.

For steel, you are better off using a traditional rosin flux or a no-clean plumbers flux for lead free jointing. Steel really doesn’t need a aggressive flux…[Read more]

]]> c6da5d3bd65bef18098ca673e08d9088 JasonB replied to the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/#post-853699 Sat, 27 Jun 2026 12:20:10 +0100 Bicarbonate of soda mixed with water.

]]> db2702cbd0c1ace56add60fc22361eda Neil Wyatt replied to the topic Introducing myself in the forum Introduce Yourself - New members start here! https://www.model-engineer.co.uk/forums/topic/__trashed-2/#post-853696 Sat, 27 Jun 2026 12:13:05 +0100 Hi Tim,

It’s not screwed, just a more modern flange fixing as Jason describes. I’d just add they are drilled for three and four M6 fixings, the spigot is normally a close sliding fit, and the spindle is bored MT3. There are versions with larger spindles that take a nominally 4″/200mm chuck.

There are lots of books out there with accessories and…[Read more]

]]> 0fe71fd5cb119de41a37addfa38e48fa Pippin started the topic Neutralising Bakers No. 3 fluid in the forum General Questions https://www.model-engineer.co.uk/forums/topic/neutralising-bakers-no-3-fluid/ Sat, 27 Jun 2026 12:07:22 +0100 Did some soldering of mild steel, using Bakers No. 3 as a flux. 3 weeks later, and anything that went near the job won’t stop rusting. Have scrubbed with scotchbrite and evaporust then oiled up, just goes orange again. How on earth do I stop it?

]]> c83b680dbac48f8a223192ea5b63606e Dr_GMJN replied to the topic Traction Engine Metal Colours in the forum General Questions https://www.model-engineer.co.uk/forums/topic/traction-engine-metal-colours/#post-853692 Sat, 27 Jun 2026 12:00:22 +0100 Thanks all, I’ll link them direct to this thread.

]]> 235e900a0eec310c3b3ea49183b6da85 Julie Ann replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853675 Sat, 27 Jun 2026 11:16:26 +0100 The incoming spikes on the mains are generally of short duration (microseconds) and high voltage (several kV) and are generated by substation switching or external interference. They are dealt with using MOVs or transzorbs.

A VFD output does not inherently produce spikes. The output is a PWM signal where the pulse width changes on a cycle by…[Read more]

]]> 67d631c384ca042945727f6e74d14e3b Andrew Skinner replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853674 Sat, 27 Jun 2026 11:14:52 +0100 https://industrialmonitordirect.com/blogs/knowledgebase/eaton-reflected-wave-trap-for-vfd-motor-protection

This link suggests that switching frequency can affect reflected waves and voltage doubling at the motor terminals. The impedance mismatch from VFD -> cable -> motor is the root cause. However, the problem seems to exist only for longer…[Read more]

]]> 18e89bf0f25d7dc55316a49c213cc5e8 Dave Halford replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853671 Sat, 27 Jun 2026 11:13:25 +0100 Old motors suffer from failed insulation anyway, even single phase ones like mine, who can tell what causes it?

]]> 86a08b90fa74fa27de72dabb9ae6538d John Haine replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853668 Sat, 27 Jun 2026 10:51:07 +0100 Voltage spikes shouldn’t be much affected by switching frequency. Thinking in terms of harmonics is not very useful for this kind of problem, it’s caused by current or voltage rate of change. As I think Robert said above some small inductors in series with the motor connections  should be enough and there may be a selection guide in the vfd…[Read more]

]]> 12f837332c0c35d147fbcf3e24ed7486 John Haine replied to the topic Unusual opto fork setup in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/unusual-opto-fork-setup/#post-853667 Sat, 27 Jun 2026 10:42:45 +0100 LED brightness degrades over time so it may be to allow the drive current to be adjusted as they age? I recently worked on a 50 year old clock using LED/phototransistor pendulum sensing where the LEDs had basically given up.

]]> d706b6406f129afeb1bf71c7f8ff6190 stephen. posted a new Ad Part built 5 inch gauge Terrier locomotive. https://www.model-engineer.co.uk/activity/p/79556/ Sat, 27 Jun 2026 10:26:12 +0100 Chassis, castings, boiler, smokebox, drawings and photocopies of ME build articles. Boiler looks well made, however when tested it had […]

]]> 0 134ee3780088b7b0ca6e89bf3ee991b8 alecs replied to the topic Testing Single Point Thread Fitment in the forum Beginners questions https://www.model-engineer.co.uk/forums/topic/testing-single-point-thread-fitment/page/2/#post-853662 Sat, 27 Jun 2026 10:15:05 +0100

On 27 June 2026 at 09:32 Diogenes Said:
Aha – ‘ Traditional crafts’ – I should have expected as much..

Guns, and everything else, were manufactured along non-standardised traditional craft lines until lateish 1800s. It was the Springfield Armory during the US Civil War 1860-65 who pioneered standardised mass production, so gun parts were interch…[Read more]

]]> 3286f01121ea73a726a4f33663a5006e Andrew Skinner replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853657 Sat, 27 Jun 2026 09:50:43 +0100 The carrier frequency on the LS M100 can be adjusted from 1 to 15 kHz, default 3. I wasn’t sure why you’d need to change it, so left it at factory. I assume you’d want it as low as possible, without being annoying to listen to, if trying to reduce voltage spikes. But is whatever I choose the problem frequency, or is the motor damage happe…[Read more]

]]> 7decb7adfeefdbbf0015a29ebc88be9e Roger Hart started the topic Unusual opto fork setup in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/unusual-opto-fork-setup/ Sat, 27 Jun 2026 09:23:28 +0100 In the process of reworking a telescope Alt/Az drive system.  Uses dc motors with opto forks.  The Alt axis opto emitter is driven by a 4 resistor D-A setup.   In this case 510,1000,2000,3900 ohms to a microprocessor port. Presumably to ‘fine tune’ the sensitivity of the dual photo transistors that enter the software feedback loop.

I had not com…[Read more]

]]> f0c18ec8846ef68b0eaf7ecd4ee48307 Graham Meek replied to the topic Myford VMC Spindle Advice Please. in the forum Manual machine tools https://www.model-engineer.co.uk/forums/topic/myford-vmc-spindle-advice-please/page/2/#post-853653 Sat, 27 Jun 2026 09:15:53 +0100 You could try a trick I found to work over the years. Lubricate the Quill with Brasso as you re-insert the Quill. Oscillate the quill as you enter the housing, but not by much. Try and keep the Quill in about its working position. At the slightest sign of the Quill going tight. Retract the Quill slightly and give the Quill a squirt of WD 40, but…[Read more]

]]> 3cd9c24ed23561fb85efc7851cf5ab5f JasonB replied to the topic Traction Engine Metal Colours in the forum General Questions https://www.model-engineer.co.uk/forums/topic/traction-engine-metal-colours/#post-853652 Sat, 27 Jun 2026 09:00:29 +0100 I don’t think any of the steel would be “polished” in the true sense to a very fine finish. More likely a drawfilled or Emery finish that is kept bright with an oily rag. Well used surface slike steering wheel handle may have become more polished over time by handling.

I did send one of our members that is building a DCC a video of the engine…[Read more]

]]> 85a256b663e9def6320549e18b104e7e not done it yet replied to the topic Surface grinders choice in the forum Workshop Tools and Tooling https://www.model-engineer.co.uk/forums/topic/surface-grinders-choice/#post-853649 Sat, 27 Jun 2026 08:55:21 +0100 Surface grinders, if badly worn are a PITA.  I couldn’t manage a 540 (weight and space) so eventually found an Eagle manual machine in good-ish order.  I’ve been happy enough with it, for the few times it is neeeded.

]]> 35260401bb2a1292267ad093da16401c not done it yet replied to the topic Using VFDs on old motors in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/using-vfds-on-old-motors/#post-853646 Sat, 27 Jun 2026 08:50:18 +0100 I’m like most above.  Always converted to delta and used a VFD or simply driven the motor on star.  Never considered any bodge, which provides only one frequency (motor speed).  I do have a Transwave converter but don’t use it and will eventually (as soon as possible) get rid of it!

Capacitors can give up with long-term unused VFDs, I believ…[Read more]

]]> 23c9cbeaa0f0b074a13f51e7739711a4 Diogenes replied to the topic Testing Single Point Thread Fitment in the forum Beginners questions https://www.model-engineer.co.uk/forums/topic/testing-single-point-thread-fitment/page/2/#post-853642 Sat, 27 Jun 2026 08:32:25 +0100 Aha – ‘ Traditional crafts’ – I should have expected as much..

]]> 313158ff6124ddcaa0ee971c9a4dbf92 Bob Worsley replied to the topic Running 380V 3-phase motor on 230V 1-phase in the forum Electronics in the Workshop https://www.model-engineer.co.uk/forums/topic/running-380v-3-phase-motor-on-230v-1-phase/page/2/#post-853638 Sat, 27 Jun 2026 08:31:24 +0100 Did I say that you needed a vector voltmeter? No, I use the theory of vectors as taught to everyone, including me, but not obviously you, for decades. A triangle is a rigid structure, the way to guarantee a 90 degree angle is to make a 3-4-5, or 5-12-13, triangle. Whatever you say the angle is 90 degrees. Similarly with three equal sides, it has…[Read more]

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