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Extreme Electronics
@Extelec@mstdn.social
mastodon 4.7.2Tesla coils - HV experiments - 3D printing - Programming - Kits via @ExtKits@mstdn.social - Gaussfest Organiser - Electronics and shed science. - Retro computing
https://www.extremeelectronics.co.uk
Playing with forces I don't understand.
#HighVoltage #RetroComputing #Science #fedi22
Toots don't necessarily reflect the views of my employer. I work for myself.
2428 Followers
1527 Following
50 Posts
Joined April 27, 2022
The Gaussfest will be on the 10th October at the London Museum of Water and Steam
Details https://www.extremeelectronics.co.uk/the-gaussfest/
Tickets https://
lmws.digitickets.co.uk/event-tickets/68513?catID=65283&
Tesla coils, high voltage demonstrations, electrostatic machines, Van de Graff.
And a Victorian Pumping station.
All takings go to supporting this brilliant museum.
If anyone wants to exhibit, DM me.
Please Boost for reach.
4K pictures are fine, but have you seen the size of the film canisters.
Jodrell Bank's soon to be decommissioned (i really hope not) telescope, should be used to RF illuminate any space reflective satellites, ideally at their uplink frequencies.
I'm sure the FCC have no jurisdiction over this use, so it must be ok.
Ill apologise now, if JLCPCB has "suddenly" run out of some of their range of SMD mosfets.
I have no idea how this happened ;)
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@concretedog@mastodon.social @kicad@fosstodon.org
Kicad can too, but it does require the arranging of 143 transistors.
Sad to have to leave #emfcamp slightly early.
But, what an event... way too much to put in a post.
Thanks to all of the organisers, speakers, workshoppers, installationers, network, power, toilet/shower and nullmakers? for putting on another superb event.
And thanks to all the people who came to @ExtKits@mstdn.social at the #nightmarke and workshop.
Hopefully see you again in 20 to 25 months :)
RE: https://beige.party/@maxleibman/116965367300703261
Dear Pay/Subscribe web sites. Please look at this poll, and inwardly digest.
That's your advertising you are loosing, even if you don't get a subscribe,.
If i sit in a pub, and randomly scream at the top of my voice, I get thrown out.
But if i support sports ball, its totally accepted.
I'm being singled out here.
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@pikesley@mastodon.me.uk @janamarie@mystical.garden I wouldn't go, there would be no atmosphere.
Shhhh , please don't scream into the void.
The void is asleep, and you really don't want to wake the void!
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@SecureOwl@infosec.exchange Next level, Finding network infrastructure plastered into a void in the wall.
And congratulations to an insolvency practice that has just sent me the most pishing like email I’ve ever had from a real company.
Please provide:
List of all user accounts - usernames and passwords
Administrator login credentials for laptops & desktops.
Website username and passwords.
to be sent back by email in WORD
to someone I've never dealt with.
Even if I had access all of the above. Hell NO!
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@4Dboy@mastodon.social It all came from a post showing how Softbank contains no real value, but explained with golden geese/eggs. I can't find the original post.
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social Hi-gain and narrow beam are exactly the same (Physics) so the focus of either should be exactly the same (beam angle) for a particular gain. I was talking about making one. The engineering at 5Ghz is really tight for high gain designs, but with a dish, you only have to worry about focal point, which is a point at source and tune for maximum smoke kind of solution. (especially if you use the sun to find your focal point)
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A bit of a clean and the meter works, 7.4mA for full scale. It does explain the low resistance. You forget how insensitive early meters were. I also suspect the magnets in the movement might not be what they once were.
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At least the meter looks untampered with, although not working and a dubiously low resistance.
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@Tesseks@mastodon.social @rc2014@oldbytes.space @drlucyrogers@mastodon.social @semachthemonkey@mastodon.social @semachthemonkey@mastodon.me.uk
Look after yourself, loads of wet towels and drinks...
See you next time.
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social Looks great. And cheaper than a bid on Joderell bank.
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@TheBreadmonkey@beige.party it is the correct ratio, although missing about 500mL of sauce.
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I've worked out the Voltage scales.
Off
0-600v x4
0-300v x2
0-150v direct
0-15v /10
and 0-150mV for the Mili-volt connection.
They should just be a matter of getting the right resistor values, and rewiring.
Current is a guess, but I'll go for 0-1.5A without shunt. As this will be a useful range, no other reason.
This could change, IF I get more information on the set.
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social Dishes work very well, and although they are bulky, they don’t need to be ridiculously accurate to work well. (but the feed does)
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social Yes, yes it is, the gain will be less by (waves hands) "an amount" for the lower frequency, but I'd expect 30-40db maybe.
If I could remember my college education better I'm sure I could calculate it.
This is the problem with not doing any college this century.
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social 400Mhz is probably at the low end of its working range so may spread a little. I'm sure somewhere there is a gain figure for the dish (probably for higher frequencies) DTL is probably more of an expert here than me.
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@Maker_of_Things@cupoftea.social @drlucyrogers@mastodon.social As was suggested at the book launch for "UP" :)
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A rough plan for replacing the Innards of the meter.
Suggestions on appropriate (for its age) resistor types welcome.
As is any reference to this meters existence.
I know the company, I know it's not a transistor tester (I suspect valve era) , but the internet comes up blank.
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@snaprails@cupoftea.social Oh yes, with no idea what damage they were doing, by the looks of it.
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@drlucyrogers@mastodon.social "It's ONLY Rocket Science" by Lucy Rogers
Or, the only way is "UP" by Lucy Rogers
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@Noorvee@zirk.us The origin of most UK (and especially German) nursery rhymes is disturbing.
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@davep@infosec.exchange @dtl@8bitorbust.info @a2es@mstdn.social Yes, and some sort of focussing arrangement if it doesn’t have it already
I need to get a medical bracelet with the name of the prime minister on it, incase I have an accident and the paramedics ask me.
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@stux@mstdn.social We have Larry in the Prime Ministers office. He has outlasted too many PM's to count now.
https://www.gov.uk/government/history/10-downing-street#larry-chief-mouser-to-the-cabinet-office
Popup "We value your privacy" meaning : We are desperately trying to sell your privacy.
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