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gaaaah yeah true but wired wand detracts from dexterity with intelligent control you could get around the fingers-as-barrier thing also you could just lightly touch the things together and maybe the resistance too high to get a good ring on the bell? know whatcha mean though.

skoool Xmas fares coming up in community centres in these parts. I have wanted to do a giant buzz wire game thing for ages. I remember back in the 80s a local electronic firm did one for the school, just a simple affair with a telephone bell & shiny brake-pipe "route" to trace the (wired) wand...

any RF bods done any practical TDR'ing with the latest budget VNA's that are now available? I have a miniVNA pro and a JNCRadio SV6301A, and I believe that both of these offer TDR functions.... was thinking of things like finding where the break in a cable that goes across the lawn to the garage...

I don't doubt that it (poured vermiculite filler) is frequently used, but I'm trying to work out if it's a good thing or not. you say "way before", what do you mean - do you mean to imply that you pour the verm then allow a period of time for drying, or you pour the verm, then allow a period of...

Old stone-built house, damp gable. ground floor + 1st floor, then small loft void. suspected primary cause of damp is chronically failed chimney/cap. I am in middle of replacing chimney/cap. Which is to say I've removed the failed chimney & concrete cap element as far as the top of the stone...

pricking around with a thermal camera, thought I may as well do an experiment.

because there is no other bar or similar that we normally see holding TO220 packages in close squeeze with their heatsink

Yeah this stuff isn't usual white/grey non-setting thermal compound for use on CPU's, etc. this is some sort of glue which provides the mechanical hold-down too.

Please see attached. I had to dismantle this PCB to repair a connector. I prised the FETs off this dried goo, which I guess must be some thermally conductive glue. is there any secret sauce to this, or could I just use any "RTV" setting silicone tube (like the tubes of goo that come with Furuno...

When I said of Falkalnds that "they use the 2m radio in exactly this way", I guess that I meant more that nobody in FI got precious about who was using a repeater so long as somebody associated with the radio had a license; children, wives, sisters, brothers, visiting sheep shearers, boatmen...

that amazes me. I thought the F course was pitched high, personally. especially the non pictorial stuff, like the legislation and ohms law/power law. I was surprised at the somewhat high level of numeracy and comprehension required, if the aim was to get schoolkids in.

interesting you say this. I have wondered about the precise definition of the "under supervision" part of the licensing conditions for these purposes. To be clear, "these purposes" are - general domestic logisitical comms. My lad, 13, is technically minded, genuinely wary of social media and...

yes agreed. I have mucked around with these mechanisms on the chinese products. In this case, the tone sequence only needs be sent once for each qso; it has the effect of causing the radio to alert (ring) and opening the rx mute. this will then idle for 20s or so, resetting within that period on...

Good point, I did not make that clear. this is so that a licensed amateur operating /p with a handie can call domestic base QTH where there is a trx in a family area (kitchen) which might otherwise be an audio nuisance on its "normal" noise squelch. base trx is also operated by licensed amateur...

At the risk of getting booted, for being completely off the topic of UK Electric, but also because I know there are a few honey roasters on here; Is sending DTMF sequences through a licensed 2m repeater in UK "compliant" with amateur licensing? "why would you want to?" in this case, to...

Thanks for this, I have emailed those 2 addresses the details.

Well I attempted to inform the DNO which appears to be UK Power Networks, via their website but gave up when it seemed to be guiding me towards being "responsible" for my information (MPAN number was not optional). I guess this makes some kind of sense to avoid nuisance hoaxing, but I got the...

is this normal? it appears to me that there is likely 400VAC between adjacent conductors in this photo, with conductors bridged by at times damp foliage.... which on the face of it seems quite a fire risk. but this is clearly operable. what am I missing?! (location is cambs UK)

Saw one of these tother day (see photo) I've seen a few like this over the years, and it seems to be always the L conductor that cooks up. whenever Ive seen this, it's been in "known dodgy" situations (ie, where unregulated DIY shenanigans are continuously ongoing, with operators who are...

why not two spoons in close contact? arcing could feasibly lead to nasty smoke, fumes or even metal fire (or arcing to the cavity) which indirectly could cause significant damage. but just arcing within the cavity - that's fine (??) - it represents energy being consumed (turned to heat) within...