user134450

joined 2 years ago
[–] [email protected] 4 points 2 years ago* (last edited 2 years ago)

i did not see any text that mentioned the guided variant but i saw a video that showed supposedly a UA gunner in a PzH2000 with a programming adapter on a shell like they are used with Vulcano ammo. (looks like a round copper ziggurat)

Edit: just read the description of those shells by the manufacturer and i i think i misunderstood programmable shell to mean guided shell. the programming could also be for setting the fuse.

[–] [email protected] 3 points 2 years ago* (last edited 2 years ago) (2 children)

They have guided Vulcano ammo in that caliber too.

[–] [email protected] 3 points 2 years ago* (last edited 2 years ago) (1 children)

click on the link pls

[–] [email protected] 3 points 2 years ago (3 children)
[–] [email protected] 3 points 2 years ago* (last edited 2 years ago) (2 children)

yes indeed. i keep being confused how email can still suck so much sometimes when it had decades to mature.

[–] [email protected] 1 points 2 years ago

small nitpick: portland cement making is 150 years old.

we have been using hydraulic cements (crushed limestone, pozzolans etc.) since literally antiquity.

also this is really big because portland cement making and to a lesser extend also other types of cement making account for some 5% of global anthropogenic co2!

half of that is just from the chemical reaction of calcining the limestone and is thus independent of the used energy source.

[–] [email protected] 8 points 2 years ago* (last edited 2 years ago) (6 children)

yeah this is a real pet peeve of mine.

In German many people, web mailers and also sometimes even email software use "AW:" (short for AntWort) instead of "Re:" and then some of them don't even recognize the existence of a previous "AW:" or "Re:" giving you such wondrous email subjects as: "AW: Re: AW: Re: AW: AW: Re: AW: Re: really important subject" 🤦

[–] [email protected] 6 points 2 years ago* (last edited 2 years ago)
[–] [email protected] 2 points 2 years ago* (last edited 2 years ago)

i think the mine was successfully removed. so, mission accomplished?

[–] [email protected] 4 points 2 years ago* (last edited 2 years ago) (1 children)

just found this post: https://mstdn.social/@deaidua/111308908881071433

so they are possibly Sonobot 5's

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

btw. i believe this is somewhat similar to how Switzerland handles assault rifles nowadays. There are situations where you are allowed to have an assault rifle at home or even carry it in public but the ammo has to be locked away at a central storage that is guarded. They can very quickly hand out the ammo to the holders if necessary, i.e. for training on the shooting range. I am not Swiss so this is only hearsay though.

[–] [email protected] 1 points 2 years ago* (last edited 2 years ago)

Acording to the datasheet the TDA7294 uses -V~s~ and +V~s~ in the block diagram so i would assume it is intended to be used with DC power. If the module is specced for use with AC as well as DC, then this just means what you already suspected: it has an integrated bridge rectifier and most likely some sort of low pass for the rectified power (read: a bunch of big capacitors).

You could just go with a big transformer core that powers them all at the same time; many commercial amps do that and it works fine in general, provided you have enough margin for power spikes and the modules will not influence each other when connected in parallel to power.

In my opinion using separate transformers would be paranoid but it would work of course.

Edit: dont forget that this thing will produce heat. If you really go with an 800W transformer then you have to be able to cool about 400W in the worst case (going by the data sheet power dissipation of the chip and assumed transformer + rectifier efficiency of 90%).

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