03-03-2017 03:33 PM
Henrik:
Now that we know what it is, what they heck was it used for?
Surely not a 5kW coffee mug warmer!
-AK2DM
03-03-2017 05:31 PM - edited 03-03-2017 05:35 PM
I work at PTB
we have all kind of exstremely parts here 😄 mostly exstemely precise 😉
But since I'm in the acceleration dep., I'll have to ask some fellows, but usually
1. to measure serious currents
2. to calibrate other stuff
I just ask myself: How do they generate 23kA DC current without having my desk lightbulb flickering?
And THAT is real current plumbing 😄 😄
03-26-2017 06:45 PM
I just ask myself: How do they generate 23kA DC current without having my desk lightbulb flickering?
And THAT is real current plumbing 😄 😄
I was lucky to be able to walk inside one of the JET's flywheel generator which was stopped for maintenance a few years ago. Incredible thing 🙂
https://www.euro-fusion.org/fusion/jet-tech/jets-flywheels/
More about large dc currents: once i saw a current lead in for a large magnet. The emergency switch was chemical explosives planted on the aluminium current line
03-27-2017 08:17 AM
@Blokk wrote:
I just ask myself: How do they generate 23kA DC current without having my desk lightbulb flickering?
...
The emergency switch was chemical explosives planted on the aluminium current line
"Blow the breaker" makes more sense in that context. The "crowbar" for the power supply used Sea-sparrow missile radars was literally a crowbar sized shunt that would short out the supply if over-voltage conditions were sensed. There is nothing like having your head inside a cabinet, tweaking to tune a klystron and just as you are getting to acceptable an acceptable tune, the crow-bar would trip sound like a gun going off!
Funny how a defective RF gasket in a section of waveguide can make for a very bad day. High SWR is not good.
Ben
03-28-2017 10:31 AM
@Ben wrote:
@Blokk wrote:
I just ask myself: How do they generate 23kA DC current without having my desk lightbulb flickering?
...
The emergency switch was chemical explosives planted on the aluminium current line
"Blow the breaker" makes more sense in that context. The "crowbar" for the power supply used Sea-sparrow missile radars was literally a crowbar sized shunt that would short out the supply if over-voltage conditions were sensed. There is nothing like having your head inside a cabinet, tweaking to tune a klystron and just as you are getting to acceptable an acceptable tune, the crow-bar would trip sound like a gun going off!
Spoiler
Funny how a defective RF gasket in a section of waveguide can make for a very bad day. High SWR is not good.
Ben
or even several bad months when the VSWR alarm goes off almost every day (And, just before evening mess call to boot!) you can miss a lot of dinners trying to find that root cause.
04-11-2017 07:31 AM
Last night while tending to the orchard I found two of these.
What are they and what are they good for?
Ben
04-11-2017 07:36 AM - edited 04-11-2017 07:39 AM
Aliens in Bens garden 😄
Some insects like Gall wasps are able to make plants building their home ....
04-11-2017 07:43 AM
@Henrik_Volkers wrote:
Aliens in Bens garden 😄
Some insects like Gall wasps are able to make plants building their home ....
Getting close but no cigar!
Ben
04-11-2017 02:49 PM
Hint #1
Ben
04-11-2017 06:57 PM