SunandWeather Electronics
SunandWeather Electronics
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Відео

Power Mixer Broken Again - Carlsbro Cobra 90 PA Troubleshooting and Repair Part IIPower Mixer Broken Again - Carlsbro Cobra 90 PA Troubleshooting and Repair Part II
Power Mixer Broken Again - Carlsbro Cobra 90 PA Troubleshooting and Repair Part II
Переглядів 1222 місяці тому
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
New YouTube Channel Launched!New YouTube Channel Launched!
New YouTube Channel Launched!
Переглядів 642 місяці тому
It is time to clean up the channel a bit, and in the process a new UA-cam channel is launched! The new channel will host the video game related science videos while this channel will be focused on electronics. New channel: ua-cam.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 AnalysisThe DOOM Plasma Rifle - A Technical Analysis
The DOOM Plasma Rifle - A Technical Analysis
Переглядів 33 тис.Рік тому
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...
Why Can We Hear Lightning? #shortsWhy Can We Hear Lightning? #shorts
Why Can We Hear Lightning? #shorts
Переглядів 91Рік тому
Learn why lightning strikes and other electric arcs are audible. Balloon clip: Title: Balon-patlatma-10000.gif Author: Nevit License: CC BY 3.0 (creativecommons.org/licenses/by/3.0/) Source: commons.wikimedia.org/wiki/File:Balon-patlatma-10000.gif?uselang=zh #shorts
The 5 Whys in Electronics Repairs #shortsThe 5 Whys in Electronics Repairs #shorts
The 5 Whys in Electronics Repairs #shorts
Переглядів 146Рік тому
What can you learn from Toyota to help you with electronics repairs? Full video of Hagström PA-200 Reverb repair: ua-cam.com/video/0yBAuMLxMR4/v-deo.html #shorts
Repairs when Parts are Missing #shortsRepairs when Parts are Missing #shorts
Repairs when Parts are Missing #shorts
Переглядів 470Рік тому
Tips on how to tackle an electronics repair when you only receive part of the unit. #shorts
Replacing the Tape Loop in a Tape Echo #shortsReplacing the Tape Loop in a Tape Echo #shorts
Replacing the Tape Loop in a Tape Echo #shorts
Переглядів 388Рік тому
Replacing the magnetic tape loop in the tape echo of a Dynacord King Guitar Amplifier. Full video: ua-cam.com/video/3FTS9VxDL9s/v-deo.html #shorts
Soldered Heat Sinks Can Give You Trouble #shortsSoldered Heat Sinks Can Give You Trouble #shorts
Soldered Heat Sinks Can Give You Trouble #shorts
Переглядів 1,1 тис.Рік тому
Something you should know when you are dealing with soldered board level heat sinks. Vox Escort Guitar Amplifier repair video: ua-cam.com/video/PdST3IlsEmw/v-deo.html #shorts
Speed Repair: Carlsbro Cobra Power Mixer #shortsSpeed Repair: Carlsbro Cobra Power Mixer #shorts
Speed Repair: Carlsbro Cobra Power Mixer #shorts
Переглядів 556Рік тому
A condensed version of the repair of a Carlsbro Cobra 90 PA Power Mixer. Full video: ua-cam.com/video/hnVTfMxsLDE/v-deo.html #shorts
Troubleshooting and Repair of the Vox Escort Portable Guitar AmplifierTroubleshooting and Repair of the Vox Escort Portable Guitar Amplifier
Troubleshooting and Repair of the Vox Escort Portable Guitar Amplifier
Переглядів 934Рік тому
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 6/6How Good Can a Wire Recorder Sound? - Ekko Recorder Restoration Part 6/6
How Good Can a Wire Recorder Sound? - Ekko Recorder Restoration Part 6/6
Переглядів 1,8 тис.2 роки тому
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: ua-cam.com/video/TUdeO26Qvwo/v-deo.html Part 2 - The Mechanics: ua-cam.com/video/xF_6U3VeoIo/v-deo.html Part 3 - A Valuable Lesson About Film Capacitors: ua-cam.com/vi...
Wire Recorder Tweaks and Repairs - Ekko Recorder Restoration Part 5/6Wire Recorder Tweaks and Repairs - Ekko Recorder Restoration Part 5/6
Wire Recorder Tweaks and Repairs - Ekko Recorder Restoration Part 5/6
Переглядів 1932 роки тому
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): ua-cam.com/video/SBV8MOq8DX4/v-deo.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: ua-cam.com/video/TUdeO26Qvwo/v-...
Refitting an Old Electrolytic Multi Capacitor - Ekko Recorder Restoration Part 4/6Refitting an Old Electrolytic Multi Capacitor - Ekko Recorder Restoration Part 4/6
Refitting an Old Electrolytic Multi Capacitor - Ekko Recorder Restoration Part 4/6
Переглядів 2632 роки тому
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): ua-cam.com/video/C4pWrPtO91U/v-deo.html Ekko Recorder Restoration Contents: Part 1 - A Look...
Why You Should Avoid High Voltage Film Capacitors - Ekko Recorder Restoration Part 3/6Why You Should Avoid High Voltage Film Capacitors - Ekko Recorder Restoration Part 3/6
Why You Should Avoid High Voltage Film Capacitors - Ekko Recorder Restoration Part 3/6
Переглядів 4662 роки тому
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): ua-cam.com/video/E05mo0_ais0/v-deo.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: ua-cam.com/video/TUdeO26Qvwo/v-deo.html Part 2 - The Mechanics: u...
Replacing the Suspension and Break Pads on a Wire Recorder - Ekko Recorder Restoration Part 2/6Replacing the Suspension and Break Pads on a Wire Recorder - Ekko Recorder Restoration Part 2/6
Replacing the Suspension and Break Pads on a Wire Recorder - Ekko Recorder Restoration Part 2/6
Переглядів 1702 роки тому
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): ua-cam.com/video/ABCRyNL46o0/v-deo.html Ekko Recorder Restoration Contents: Part 1 - A Look Inside: ua-cam.com/video/TUdeO26Qvwo/v-deo.html Part 2 - The Mechanics: ua-cam.com/video/xF_6U3VeoIo/v-deo.html Part 3 - A Valua...

КОМЕНТАРІ

  • @jonelectronics510
    @jonelectronics510 16 днів тому

    Great video!

  • @francomattei9545
    @francomattei9545 17 днів тому

    would this be a repair?

    • @SunandWeather
      @SunandWeather 17 днів тому

      Nah, hence the scare quotes around "Repair".

  • @crabohato4954
    @crabohato4954 20 днів тому

    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

  • @crabohato4954
    @crabohato4954 20 днів тому

    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"?

    • @SunandWeather
      @SunandWeather 20 днів тому

      Interesting suggestion to focus on a specific version! Thanks!

  • @rynobehnke8289
    @rynobehnke8289 Місяць тому

    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.

    • @SunandWeather
      @SunandWeather Місяць тому

      Good point! The lock-on technology might have made it difficult to design a reliable battery type save feature.

  • @wilville3752
    @wilville3752 Місяць тому

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

    • @SunandWeather
      @SunandWeather Місяць тому

      Interesting idea! The question is if there are permanent magnets strong enough for this setup to be feasible.

    • @crabohato4954
      @crabohato4954 20 днів тому

      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.

    • @crabohato4954
      @crabohato4954 20 днів тому

      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

  • @KulKlas
    @KulKlas Місяць тому

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

  • @MrRebostiano
    @MrRebostiano Місяць тому

    ...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.

  • @ansistrus
    @ansistrus Місяць тому

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

  • @inkmime
    @inkmime Місяць тому

    Like taking a flamethrower and making a rifle out of it

  • @twotone3070
    @twotone3070 2 місяці тому

    Nice weather shielding.

  • @ricardlupus
    @ricardlupus 2 місяці тому

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

  • @OLIVERTODINO
    @OLIVERTODINO 2 місяці тому

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

  • @PlasmaFreak
    @PlasmaFreak 3 місяці тому

    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.

  • @TT.Hell.
    @TT.Hell. 3 місяці тому

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

  • @txilibrist
    @txilibrist 3 місяці тому

    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

    • @SunandWeather
      @SunandWeather 3 місяці тому

      Hello! It sounds like the charge pump on your unit is working as intended, so the failure is likely elsewhere.

  • @riders.oregon4474
    @riders.oregon4474 3 місяці тому

    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.

    • @SunandWeather
      @SunandWeather 3 місяці тому

      Nice! Using capacitors with higher voltage rating than required is rarely a problem.

  • @robertdavis5714
    @robertdavis5714 3 місяці тому

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

  • @TrevorsBench
    @TrevorsBench 3 місяці тому

    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.

    • @SunandWeather
      @SunandWeather 3 місяці тому

      Thanks for the information! I will keep an eye out for those.

  • @flybywire5866
    @flybywire5866 4 місяці тому

    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.

    • @SunandWeather
      @SunandWeather 4 місяці тому

      Nice! DOOM II was my first PC game.

  • @mickbrown815
    @mickbrown815 4 місяці тому

    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.

    • @SunandWeather
      @SunandWeather 4 місяці тому

      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.

    • @mickbrown815
      @mickbrown815 4 місяці тому

      @@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.

  • @vanadiumV
    @vanadiumV 4 місяці тому

    the name of that spark tube device is KRYTRON

    • @SunandWeather
      @SunandWeather 4 місяці тому

      Nice! I did not know that.

    • @vanadiumV
      @vanadiumV 4 місяці тому

      @@SunandWeather Greetings from Morocco !

  • @ricardopereira9262
    @ricardopereira9262 4 місяці тому

    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

    • @SunandWeather
      @SunandWeather 4 місяці тому

      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.

    • @ricardopereira9262
      @ricardopereira9262 4 місяці тому

      @@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

    • @SunandWeather
      @SunandWeather 4 місяці тому

      @@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.

    • @ricardopereira9262
      @ricardopereira9262 4 місяці тому

      @@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

  • @markboyle9941
    @markboyle9941 4 місяці тому

    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.

  • @kimsung2384
    @kimsung2384 4 місяці тому

    This is an excellent video

  • @felixyasnopolski8571
    @felixyasnopolski8571 5 місяців тому

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

  • @Pepe-ry8pm
    @Pepe-ry8pm 5 місяців тому

    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 🙂

  • @AudioElectronicsChicago
    @AudioElectronicsChicago 5 місяців тому

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

  • @ericastier1646
    @ericastier1646 5 місяців тому

    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.

  • @johnmcevoy3598
    @johnmcevoy3598 5 місяців тому

    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!

    • @SunandWeather
      @SunandWeather 5 місяців тому

      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.

  • @mikemmikem2758
    @mikemmikem2758 5 місяців тому

    Brilliant and clever modification. Nice work.

  • @timothyexner
    @timothyexner 6 місяців тому

    I would love to see if you could record and retrieve computer data with this wire.

    • @SunandWeather
      @SunandWeather 5 місяців тому

      Interesting reflection! Some binary data would definitely be possible to store, but it would be interesting to know the maximum storage capacity of a wire spool.

  • @robfriedrich2822
    @robfriedrich2822 6 місяців тому

    4:18 Would have used gloves...

  • @robfriedrich2822
    @robfriedrich2822 6 місяців тому

    German electricity plugs for audio.

  • @imark7777777
    @imark7777777 6 місяців тому

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

  • @francisboamah9533
    @francisboamah9533 6 місяців тому

    It very sample and helpful

  • @TRaddcliff
    @TRaddcliff 7 місяців тому

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

    • @SunandWeather
      @SunandWeather 7 місяців тому

      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.

    • @TRaddcliff
      @TRaddcliff 7 місяців тому

      @@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.

  • @gregreynolds5686
    @gregreynolds5686 7 місяців тому

    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.

  • @magicsasafras3414
    @magicsasafras3414 7 місяців тому

    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

  • @Player-oh3ll
    @Player-oh3ll 7 місяців тому

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

    • @SunandWeather
      @SunandWeather 7 місяців тому

      Hi, look for the Service Manual, it usually contains schematics.

  • @bryanh1944FBH
    @bryanh1944FBH 8 місяців тому

    Very interesting! An actual glass switch and a real Fat Man detonator assembly (made by Raytheon) can be seen at the Bradbury Science Museum in Los Alamos, New Mexico. The switch was pre-existing and was initially invented for flash photography in night time aerial reconnaissance. The museum shows the beaches of D-Day being photographed at night in this way. Seeing the complex detonator assembly alone is worth a trip to Los Alamos. Its an incredible device!! I was just there 2 weeks ago.

    • @SunandWeather
      @SunandWeather 7 місяців тому

      Cool! Thanks for the recommendation!