Tube Audio Amplifier Troubleshoot Repair and Modification
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- čas přidán 30. 08. 2015
- See a very thorough, in-depth repair and modification of an old Thordarson T20W40 tube amplifier. This includes the "thought behind" the modifications, and schematics as well. There is a description behind the troubleshooting process as well as another description for the failure points.
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Dr. Carlson is amazing. The knowledge he has amassed qualifies him for an honorary doctorate
I'm a child of the 50's and my dad was a radio technician among other things. Our funky, detached wood garage was his lab and it was filled with oscilloscopes on shelves just like your lab, Carlson. Dad's long gone, but your videos have brought a big part of that back to me. I am overwhelmed at your knowledge and expertise and your very clear explanations. Thank you.
your videos never age. I honestly thought this video was from the last few months, but it's back in 2015. that's crazy.
I just pictured the next guy servicing this same amp in some 50 years or so, looking at your protection circuit, and going
My brain will explode if watch this much longer.
Where did you learn all this? You must have a natural talent for this, you speak very fluidly and are comfortable with electricity. You should do a video covering your history and how you became so talented in this.
Do you cringe with these Electric slash hybrid cars? I took the Chrysler, and GM training back in 2010, Rope off big area, High voltage gloves, high voltage meter to make sure it was powered down, and isolated to work on it, They were a real challenge
Mr. Carlson, what a fantastic video. Start to finish. It had everything. If there are people that want to learn electronics this is the channel they need to be watching. Also this video really helped me understand what you do for a living. Your website does a good job of that as well, but this is like having a window into your workshop and getting a guided tour. It's a real treat. Keep up the great work! I'm floored. Also you do fantastic work! Beautiful what you did here. I can't imagine your time and services are inexpensive, but I would say you are worth every cent and in reality are probably a steal. You go the extra mile and that's not a common thing. Now I'm like, "what video do I watch next?" Caps in backwards, FT-1000MP repair... ugh, it's a good problem to have. :)
Everytime I see Mr. Carlson's Lab I think he looks like an Astronaut or he's in a Submarine ..
You know I come here for several reason's. First, because after watching so many of your videos and talking back and forth via the comment section, I have come to think of you as a friend, one who I would happily shake hands with, even with this virus scare. Second, I come here to be entertained, because your video's are that and more, they keep my mind active, even though I am loosing the ability to concentrate because of age and debility. Third, I come to learn. I have been very interested in the magic in the moving electron ever since the incident I alluded to below, having the electrons coursing through a young healthy heart and soul does something to the mind that draws it to conquer that witch it fears the greatest, and that plug in the wall became a fascination and a fear at the same time. That said, I can learn more from one of your videos, about the operation of circuits, how to build them for my own purposes and the reasoning behind the operation of them then I can by reading all the books in the library dealing with electronics. So thank you for keeping an aging mind active, for your friendship over the web, and for being such a wonderful teacher. May you be safe from that horror that now inhabits our every thought across the planet, and join me on the other side of the pandemic as still my greatest teacher. May God Bless. KE0JBL
I am just awestruck by your attention to detail... right down to the added jack; handmade, hand painted, and stamped. Looks exactly period correct. You'd never know that it wasn't a factory original part! I just didn't think such workmanship and care existed in today's world. And don't get me started on your capacitor bank! Every. single. detail... perfect. Those soldering joints!!!! I've been soldering for 40 years, and thought I was a dab hand. Yet I could never make such consistently gorgeous joints! Mr. Carlson, your work is just jaw dropping. I really hope that someday you'll take on an apprentice to pass your skills on to another generation.
1959 1962 I took electronics at George Westinghouse Voca Tech HS Brooklyn NY--We studied Theory and built an
It's refreshing to see a true master at work, it's very rare in this world these days.
This is a "repair" which strains the definition of "repair!" It is the application of modern theory and common sense to a lovely old amp which had seen hard times. It will now be the centerpiece of a modern group in a different world... and will represent its age extremely well. Hats of to Paul again on an excellent set of values applied to a difficult job.
I learn more electronics here than in college... You are one of best electronic guru's out there with videos that i never get tired of watching. Thanks for posting :D
I've just watched this presentation for the second time, (two years later) , and I'm still in ore of your skill, knowledge and artistry Paul.. At least this time round I had a better understanding of your methods and analytic style. I know I'll never be in the electronic comfort zone that you have found, but your example will inspire perfection in the next generation of electronic engineers.
I know absolutely nothing about Electronics especially engineer electronics and I am hooked to this channel you are fantastic
Impeccable Paul. I do the exact same thing before applying ANY power. On the machine I work with (2" quad video tape machine) I usually unplug the various power supplies, pull ALL the Modules from the machine. Video head assembly and remove anything I can remove! I Make inventory of all circuit cards and label them with paper tags amd carefully place them in a special box. I get my air compressor and blow out years of old tape oxide, tobacco ashes and other misc dirt. I then begin all the bench work, checking/replacing caps. I made a jig to bench check the various power supplies. Once they are operational. I check the wiring harness, and backplane for any PS issues. And ok and on it goes. It takes months to restore son I can afford to be meticulous like you.