Video

And a nicely done RR as well

A burned out subminiature rectifier tube works very well for a fast switch, has a comutstion time of less than 1.4nS and a hold off to about 14kv which waa impressive. Used one to replace an impossible to find kn-6B krytron tube with slight modification of the circuitry in a miniature EMP generator that could make a peak voltage of 185kv 😮

Bom trabalho. Só faltou regular bias (corrente de repouso).

So I have the slightly newer version of this with LEDs but of course both are not working now and not sure where to find replacement, the older units it was easy to swap in a new bulb! Any thoughts would be welcome.

Great video showing detailed repair and testing of this rare 1960's amp. Re-coning the original driver might not be economical , but the replacement speaker sounded just fine.

Great video!

would this be a repair?

There's a very neat little detail about the plasma rifle I'd like to point out: the funny accordion part. To me, they could be interpreted as electromagnetic coils that accelerate the plasma bolt, just like how coilguns and particle accelerators use coils to accelerate metal or particles

Can you try and explain the BFG from Doom 3 specifically. I am utterly confused with how it might work after looking at the PDA of the BFG. Whats up with it's "computer core"?

If i had to make a guess why Sega decided to use something seemingly as overkill as FERAM it might have been because they already were planning on using a lock on cartridge to united Sonic 3 with is second half Sonic and knuckles. And as such was persistent storage that wouldn't need a battery in form of FERAM used to make this task easier to design as Sonic and knuckles would have to read and write to Sonic 3 every time it saves. Or in other words they future proved Sonic 3 for Sonic and knuckles. As to why some chips bricked? I think you might be right that it was just a few bad chips lacking in quality due to being the first consumer version ever.

Could you just launch a large magnet along with the payload to keep it from diffusing

Next build a EBW “Explosive Bridge wier” also use in the atomic detonation! Use whit som capacitor and high voltage! 🙌🏻🫶🏻👍🏻

...ooooor someone at ramtron came to SEGA with a truckload of free samples and booooooom! There it is. Also, SEGA had eeproms to deal with too... Maybe, just maybe ramtron made the IC so cheap it worth at that time.

At least it was not your hearing that was to blame 😄

Like taking a flamethrower and making a rifle out of it

Nice weather shielding.

The sparks flying at 0:42 almost rival ElectroBoom - good luck with your new channels!

Sir marunong kba mag salita ng tagalog kc my amplifier ako dito denon,ipapagawa ko sana

Great video! I think that you may be slightly off in your calculations from the get go as plasma has the tendency to expand. A soccer ball sized projectile, especially in toroid form can be formed at 1 -> 2 kJ. I have been experimenting with such a plasma accelerator for a few years off and on now and I hope to have good success with my most recent design.

I wish I had your knowledge! I have almost the same welder but completely different problem.

Thanks for the video. I have +4.96v on pin 8 (in) and -4.68v on pin 5 (out) Between pins 2 and 4 (10uf) 4.80v or +2.47 and -2.32v with reference to ground. Are the readings correct? Still not working after changing 8 capacitors Thanks

My non working 9002 came back to life after replacing all of the surface mounted electrolytic capacitors. (Maybe 15 dollars?) I bought a box that had a large variety. The voltage rating on them was higher than the ones in there but that didn’t matter. Had to watch some videos for the proper soldering techniques as they are quite small.

Enjoyed your EQ test vibration, have lived through 2 (close to epicenter) and that was pretty damn close.

Great job on chasing the faults out of this amp. Those green TK caps that Harman Kardon used at that time are garbage and should be replaced for best performance and longevity.

Doom was the first game i played on a PC. I had a 486 CPU, and soldered a 25 meter long zero modem cable for the RS232 port to connect two computers - no LAN available then, no one possessed an expansion card for that, and what is this strange L-A-N even good for anyways? - to play against each other. Thats unforgotten. The controls of this game, WASD + mouse are still in use today the same way as then. I cant play on the PS or the Xbox, since they do not offer this kind of controls. I am just too used to WASD.

need your help or suggestions....after 30 years my Technics Su-G75 amp went out.....I thought it was the fuse, ordered some 6.3amp 125v and nothing happened. Not sure what to do next? It clicks when I hit the power button but nothing turns on....I also can't seem to find a good stereo repair shop in the Houston, TX area either....everything else works fine...that it came with.... thanks in advance FOR THE HELP!! THIS WAS THE FIRST STEREO THAT I SAVED UP AND BOUGHT MYSELF.

the name of that spark tube device is KRYTRON

Hi. I have the same exact pedal, but when fuzz is turned on it has a very acentuated volume drop. The internal pot it at max position. Any ideia what issue it could be ? Thanks

These are nice amplifiers to listen to but the design is horrendous. Cost cutting at its worst. Definitely not designed with serviceability in mind as theres no access to the board where heat is most likely to cause dry joints. No discrete output stage and too much integrated unobtanium.

This is an excellent video

You could've used just actual flash tube as a trigger tube.

I don't dispute that it is low range, but regardless of that, mine has continued to work for a long time. 38 years without any breakdown 🙂

very nice upgrade, I have this model too and I hate the original speaker connectors

In what kind of "garbages" do you find broken electronics equipment in ? And by the way since someone opened it up before you and mounted the connector wrong, there must have been a problem. But maybe you are so lucky that they fixed the problem before mounting that connector wrong.

Excellent video. I have done this repair with minimal theoretical knowledge - just a basic understanding of 'these are bad, so change them.' I am curious to see if the electrolytics can be replaced with MLCC caps, as the repair has once again failed due to age. These things still sound awesome, and I'm glad people like you help give them new life!

Brilliant and clever modification. Nice work.

4:18 Would have used gloves...

German electricity plugs for audio.

4:20 what if you have a large spool of wire?

It very sample and helpful

my lights work, but the dimmer does not once I go down from full, they turn off. would the fix be the same?

Nice detective work. I have three of these in daily use and I've never had to open any them - now you've satisfied my curiosity 😊 I really like the clean UI on these units.

I hate having an idea and putting lots of work into the math and designing of it only to realize that someone else already had the idea

Where did you get the circuit diagram from? Because I have 3 resistances and need the resistance values