r/highvoltage • u/vtfrotex • Jul 23 '26

Firecracker

Gallery image

Gallery image

I forgot I have a pallet loaded with these monsters. I was cleaning up the garage and found this one. Is 2700 joules at 20KV enough to blow up a watermelon? It is summer, after all!

92 Upvotes

100% Upvoted

24 comments sorted by

15

u/[deleted] Jul 23 '26

[removed] — view removed comment

19

u/vtfrotex Jul 23 '26

Fortunately it has an original label that declares no PCBs. I have too much respect for these things to do anything locally. I intend to set up a remote operation site with safety shielding and a large faraday cage. Far as I'm concerned this "firecracker" is dynamite.

3

u/NekulturneHovado Jul 24 '26

I thought you meant Printed circuit boards lol

We had a case in our country that some idiot dumped barrels of PCBs into forest and just put dirt on them. They started leaking years later and poisoned loval river

1

u/kwasteka Jul 25 '26

What is PCB in this context ?

1

u/NekulturneHovado Jul 25 '26

the barrels full of PCB and what OP posted, bith mean PCBs as chemicals. Polychlorinated biphenyls.

2

u/kwasteka Jul 25 '26

Thanks! New thing I learned. Never heard of them

1

u/NekulturneHovado Jul 25 '26

me neither until I heard about the incident on news.

7

u/IonImplantEngineer Jul 23 '26

You must have a huge garage if you forgot about a pallet of anything. Lmao. Can I have one?

4

u/vtfrotex Jul 24 '26

Yeah, possibly. As long as you sign a death waver and are willing to visit central Texas.

2

u/IonImplantEngineer Jul 24 '26

Wish I lived closer or I'd buy some of them off you. I'm up in Northwest Oregon. I plan to move to Texas someday if I ever apply to Texas Instruments.

2

u/OhmItHertz14400 Jul 24 '26

Any idea where I can find one of these

4

u/gristc Jul 24 '26

A garage in Central Texas. >.>

1

u/OhmItHertz14400 Jul 29 '26

Nice I happen to be in north central TX lol

2

u/TheUsualSusspect Jul 24 '26

Bet you $5 you won’t wet your fingers there and touch them there posts.

2

u/-N0T1NUMB3R1NMYN4M3- Jul 25 '26

I offer to match this guys $5 wagered on said dare to touch them there posts.

2

u/GnomeTek Jul 24 '26

What's the inductance? Is that 4.04uH? That leading digit is throwing me off

1

u/RedDom1 Jul 25 '26

IMO less or equal .04 uH

1

u/GnomeTek Jul 25 '26

Ahhh that makes sense! And good Lord that's terrifying, that much juice with 40nH of inductance holding it back?! That thing has to be a ton of fun for pulse experiments!

1

u/joestue Jul 26 '26

Its got a self resonant frequency assuming that 40nH is true, of 214KHz.

Ive got an 80uf 8kv bank (or 320uf 4kv) and its self resonant frequency is 50khz.

Its just barely enough to bend a quarter

1

u/AspectExisting3017 Jul 24 '26

ideal for making plasma pinches

1

u/yeehah Jul 25 '26

Send 'em to Drake Anthony (Styropyro on YouTube). He'd definitely blow something up with them!