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SunandWeather Electronics
Sweden
Registrace 19. 11. 2008
Electronics repairs, systematic troubleshooting, tips and tricks and other electronics projects.
The Video Game Science videos have been moved to a new channel:
czcams.com/channels/sluZe0bJFFfsHWshJcJswQ.html
For music and other original content, please visit my website at www.SunandWeather.com.
The Video Game Science videos have been moved to a new channel:
czcams.com/channels/sluZe0bJFFfsHWshJcJswQ.html
For music and other original content, please visit my website at www.SunandWeather.com.
Power Mixer Broken Again - Carlsbro Cobra 90 PA Troubleshooting and Repair Part II
The Carlsbro Cobra 90 PA returns after almost 5 years in the field.
00:00 Intro
00:14 Troubleshooting
01:51 Repair
03:58 Testing/Outro
00:00 Intro
00:14 Troubleshooting
01:51 Repair
03:58 Testing/Outro
zhlédnutí: 153
Video
New YouTube Channel Launched!
zhlédnutí 66Před 3 měsíci
It is time to clean up the channel a bit, and in the process a new CZcams channel is launched! The new channel will host the video game related science videos while this channel will be focused on electronics. New channel: czcams.com/channels/sluZe0bJFFfsHWshJcJswQ.html On the new channel we will dive deep into the science of out existence, by explaining phenomena we find in video games with re...
The DOOM Plasma Rifle - A Technical Analysis
zhlédnutí 33KPřed rokem
Is the Doom Plasma Rifle technically feasible, or is it just Sci-fi nonsense? In this analysis we will try to figure out the technology behind the Plasma Rifle, and how it could be implemented in the real world. Disclaimer: This video tries to explain the operation of a fictional weapon with real world physics. Some concepts are vastly simplified and some bold assumptions are made. Referenced s...
Troubleshooting and Repair of the Vox Escort Portable Guitar Amplifier
zhlédnutí 972Před 2 lety
Repair of a portable battery powered guitar amplifier from the mid 70s; the Vox Escort. The video will also feature a short demonstration of what it sounds like at the end. 00:00 Introduction 00:25 Finding Out what is Wrong 01:17 Troubleshooting 03:20 Design/Schematic Overview 04:16 Troubleshooting Continues 04:52 Soldering Advice 05:03 Troubleshooting Continues 05:36 A Look at the TBA810S Inte...
How Good Can a Wire Recorder Sound? - Ekko Recorder Restoration Part 6/6
zhlédnutí 1,9KPřed 2 lety
Demonstrating the restored Ekko Recorder. We will listen to some of the old recordings from the 50s, as well as doing some recordings of our own. How good will it sound? Ekko Recorder Restoration Contents: Part 1 - A Look Inside: czcams.com/video/TUdeO26Qvwo/video.html Part 2 - The Mechanics: czcams.com/video/xF_6U3VeoIo/video.html Part 3 - A Valuable Lesson About Film Capacitors: czcams.com/vi...
Wire Recorder Tweaks and Repairs - Ekko Recorder Restoration Part 5/6
zhlédnutí 198Před 2 lety
The final tweaks and repairs before the wire recorder is ready for some proper testing. It includes fixing the power connector, some final fixes of the playback mechanism, repairing the signal level indicator and fixing the record functionality. Last part (Part 6): czcams.com/video/SBV8MOq8DX4/video.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: czcams.com/video/TUdeO26Qvwo/vi...
Refitting an Old Electrolytic Multi Capacitor - Ekko Recorder Restoration Part 4/6
zhlédnutí 274Před 2 lety
Sometimes the most convenient way of replacing an old multi capacitor is to reuse the case of the old one by scooping out the internals. In this case, that turned out to be quite an intense experience. This video also includes the rest of the capacitor replacement of the Ekko Recorder Next part (Part 5): czcams.com/video/C4pWrPtO91U/video.html Ekko Recorder Restoration Contents: Part 1 - A Look...
Why You Should Avoid High Voltage Film Capacitors - Ekko Recorder Restoration Part 3/6
zhlédnutí 485Před 2 lety
Choosing the correct film capacitor for your application can be trickier than you might expect. In this video we learn about the correlation between voltage rating and noise resilience of modern film capacitors. Next part (Part 4): czcams.com/video/E05mo0_ais0/video.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: czcams.com/video/TUdeO26Qvwo/video.html Part 2 - The Mechanics: c...
Replacing the Suspension and Break Pads on a Wire Recorder - Ekko Recorder Restoration Part 2/6
zhlédnutí 171Před 2 lety
Some of the mechanical components are deteriorated or worn out and replacement parts are hard to find. So, finding some clever substitutes will be required. Next part (Part 3): czcams.com/video/ABCRyNL46o0/video.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: czcams.com/video/TUdeO26Qvwo/video.html Part 2 - The Mechanics: czcams.com/video/xF_6U3VeoIo/video.html Part 3 - A Valua...
A Look Inside an Old Wire Recorder - Ekko Recorder Restoration Part 1/6
zhlédnutí 562Před 2 lety
A Look Inside an Old Wire Recorder - Ekko Recorder Restoration Part 1/6
Installing Banana Connectors on a Luxman R-5030 Amplifier
zhlédnutí 797Před 2 lety
Installing Banana Connectors on a Luxman R-5030 Amplifier
Pioneer TX-720 - AM/FM Stereo Tuner Troubleshooting
zhlédnutí 1,3KPřed 2 lety
Pioneer TX-720 - AM/FM Stereo Tuner Troubleshooting
Building a Nuclear Bomb Detonator Switch
zhlédnutí 2,1KPřed 2 lety
Building a Nuclear Bomb Detonator Switch
How does a Power Conditioner Work? + Dimmer Repair - Furman PL-PLUS E
zhlédnutí 9KPřed 2 lety
How does a Power Conditioner Work? Dimmer Repair - Furman PL-PLUS E
Denon AVR-2802 - Ghetto Repair for Common Failure
zhlédnutí 7KPřed 2 lety
Denon AVR-2802 - Ghetto Repair for Common Failure
Fixing a Noisy Disco Mixer the Stupid Way - LEM DM 82
zhlédnutí 937Před 2 lety
Fixing a Noisy Disco Mixer the Stupid Way - LEM DM 82
Hagström PA-200 Spring Reverb - Repair and Demonstration
zhlédnutí 256Před 2 lety
Hagström PA-200 Spring Reverb - Repair and Demonstration
Technics SU-V50 - Amplifier Troubleshooting and Repair
zhlédnutí 28KPřed 2 lety
Technics SU-V50 - Amplifier Troubleshooting and Repair
Yamaha A-400 - Amplifier Troubleshooting and Repair
zhlédnutí 1,4KPřed 2 lety
Yamaha A-400 - Amplifier Troubleshooting and Repair
Remote Controlled Car - Repair and Failure Analysis
zhlédnutí 304Před 2 lety
Remote Controlled Car - Repair and Failure Analysis
Hagström PA-200 - PA Amplifier Troubleshooting and Repair
zhlédnutí 306Před 2 lety
Hagström PA-200 - PA Amplifier Troubleshooting and Repair
Luxman M-120A - Power Test and Level Indicator Calibration
zhlédnutí 2,2KPřed 2 lety
Luxman M-120A - Power Test and Level Indicator Calibration
Harman Kardon PM645 Amplifier - Troubleshooting and Repair
zhlédnutí 4KPřed 2 lety
Harman Kardon PM645 Amplifier - Troubleshooting and Repair
Bench Power Supply Troubleshooting and "Repair" - Aim TTi EX355R
zhlédnutí 1,7KPřed 2 lety
Bench Power Supply Troubleshooting and "Repair" - Aim TTi EX355R
5 Unconventional Tools for Your Electronics Lab
zhlédnutí 135Před 2 lety
5 Unconventional Tools for Your Electronics Lab
5 Troubleshooting Tips for Electronics Repairs
zhlédnutí 740Před 3 lety
5 Troubleshooting Tips for Electronics Repairs
Hagström 26 Vacuum Tube Amplifier - Troubleshooting and Repair
zhlédnutí 739Před 3 lety
Hagström 26 Vacuum Tube Amplifier - Troubleshooting and Repair
SEGAs Unexpected Choice of Memory Technology for Sonic 3 and Knuckles
zhlédnutí 671Před 3 lety
SEGAs Unexpected Choice of Memory Technology for Sonic 3 and Knuckles
Cloning a PCB without Design Software - Luxman 5C50 Repair Part 2
zhlédnutí 998Před 3 lety
Cloning a PCB without Design Software - Luxman 5C50 Repair Part 2
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 😮
Cool! Thanks for the information!
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.
The LED driver circuit is most certainly completely different than the dimmer shown in this video. I would guess that it is the driver circuit, rather than the LED components, that has gone bad, but that is just a guess as I have no idea about the design of this LED variant.
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.
Thanks a lot!
Great video!
Thanks You!
would this be a repair?
Nah, hence the scare quotes around "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"?
Interesting suggestion to focus on a specific version! Thanks!
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.
Good point! The lock-on technology might have made it difficult to design a reliable battery type save feature.
Could you just launch a large magnet along with the payload to keep it from diffusing
Interesting idea! The question is if there are permanent magnets strong enough for this setup to be feasible.
So like a ball of plasma cased in a magnetic bullet casing? You'd probably end up melting the casing and turning it into a molten chunk of metal, which could either melt inside or outside the gun. There is actually a weapon being tested called MAHEM that would shoot molten pieces of metal which're propelled by electromagnetic fields created from explosions.
Even if you manage to keep the casing from melting into molten metal, the casing would have to be brittle enough to break upon contact yet still tough enough to endure the heat of the plasma. You'd need like magnets made out of room temp superconductors, which do not exist currently. Also, would the plasma inside the casing be created inside the gun, or would it already exist preheated? Creating the plasma inside or outside the gun either way may end up damaging the casing, upping the chances of an accudental plasma explosion
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!
Thanks, Ricard!
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
Hello! It sounds like the charge pump on your unit is working as intended, so the failure is likely elsewhere.
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.
Nice! Using capacitors with higher voltage rating than required is rarely a problem.
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.
Thanks for the information! I will keep an eye out for those.
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.
Nice! DOOM II was my first PC game.
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.
Hello! With such limited information, all I can do is give you some general advice on where to start. Since nothing lights up, I would start by examining the main power supply. Make sure that you get the correct dc voltages, that is powering the other boards. If you get no supply voltage to the other boards, or if some of the voltage rails are missing, there is most likely something wrong with the power supply. Please note that you will be dealing with dangerous voltages. If you do not have any pervious experience with electronics repairs, I would advice you to seek assistance from someone with more experience.
@@SunandWeather thanks for the reply back!! Believe me I will seek a experienced shop if I can find one in Houston. So I connected everything back up and everything works when I click the power button except the amp itself? I think its 2 resistors because 2 of them reading shows good the other 2 showing negative reading. If you have an email address I could send you the ones I’m talking about and the service manual I found online. Thanks again. Btw…I checked them with the unit unplugged😅 in case you were wondering.
the name of that spark tube device is KRYTRON
Nice! I did not know that.
@@SunandWeather Greetings from Morocco !
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
Hi, there are a lot of different failures that could cause this issue, so it is hard to pinpoint without troubleshooting. My first guess would be the electrolytic capacitors, since they tend to go bad eventually, but that is just a wild guess.
@@SunandWeather Thanks ! I will check that. I also read somewhere that the volume trimpot can be changed to a high value, and that is kinda common to see that volume drop. Maybe weird tolerance trimpots that dont work as they should
@@ricardopereira9262 That is a good point. If the unit has been modified or repaired with non-compatible parts, it will make the troubleshooting a lot trickier.
@@SunandWeather It seems all stock. But I read that its a common issue. So or some parts are failing (As you said) or those stock trimpots are not that spec consistent and some units were never able to reach proper fuzz volume
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
Thanks!
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!
Thanks a lot! Whether or not an electrolytic capacitor can be replaced with an MLCC depends on the circuit. I would say that in most cases electrolytic capacitors are used when high capacitance is required because they are cheaper or because MLCCs with the desired value does not exist, but in some cases the properties of the electrolytic capacitors are specifically required for a circuit to operate correctly.
Brilliant and clever modification. Nice work.
Thank you!
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?
A shorted capacitor, in the position presented in the video, would not allow the lights to turn on, unless there are something else wrong with the circuit as well. Although, if the lights are dim even when the dial is turned all the way up, it could be that the values of any, or several, of the passive components has drifted in value, causing the control circuit to charge more slowly. There is no way for me to say with certainty what the problem with Your unit is, but I would say it is unlikely that You are facing a similar failure as the one presented in the video.
@@SunandWeather thanks for getting back to me so quickly. Ya it’s weird. All the way up, lights are on. Everything else is off. Okay thanks.
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
Hi, look for the Service Manual, it usually contains schematics.