Realistic STA-2080 Comments Follow-up 

I am almost at the end and 'am listening to and watching the comment you are showing and discussing. I think the best you can do is to ignore these people. If you can block them, you should block them. You are doing a service of educating people with a free service. The thing that is annoying is the poor writing skills of people who want to complain about everything and anything. Please ignore them and continue with your good ... make it great contributions! Sorry I had to chime in though you encourage us not to do so. There, I said it.

@xraytonyb this is NOT a stupid video about fixing something from the 70s, it is another one of your great videos where you deliver both theory and practice in an easy and fun way. I have above-average knowledge about this type of electronics and I still LEARN tons from you. Pity the ones who get angry instead of taking advantage of the free education. Keep up the great work 👍.

Ever the calm teacher, thanks for setting the best example yet again Tony.

I was watching Scott Adams the other day, and he mentioned how RU-vid commentators were just the worst. You can watch him block users as he goes along. I think that's the best path. If someone is getting emotional, it's no longer useful to keep them around.

Tony, there are people that whatever you may try to convey, will never be satisfied, because it just not fit their way of understanding. So try not to get into justifying, leads to nothing. I have some 35 years of experience as a repair tech and it is refreshing to see your point of view in this field. Greetings from Quebec et continue ton excellent travail !

Wow Tony, you are so level headed and a perfect gentleman! If everyone had your attitude this world would be such a better place! I salute you sir! The end of this video makes me feel warm inside and I want to emulate your attitude! God Bless you Tony!

Dear Tony, sad to see such a stupid comment about your job. As many of the viewers on your channel, I am so pleased to see and learn from you. Your vast knowledge is like a 💎 for me. THANKS to your clear and well oriented videos, I'm learning how to restore vintage amplifiers. As always awesome job!!! Once again, thank for your time and knowledge.

One gripe I've ALWAYS had with transistor spec sheets is that there is NO universal reporting and/or specification standards. Every Mfgr just gives you the specs they want you to see.

Everyone's am expert because they saw something on the Internet. You're a true expert because you do it through years of experience.

I just heard your response to the viewer who did not understand your video. The only thing that I had a problem with was trying to understand what the viewer was trying to say. He obviously put a lot of energy in his comment and I feel bad that I didn’t understand what he was trying to say. I feel bad because the first step in communicating is to understand the initial comment and I failed at that. Personally I think you go out of your way to try to explain what you are doing sometimes I want to say ok ok ok let’s move on but I understand there are viewers who need more explanation. You do good work and I like it!!!!

I'm a new subscriber based on the last part of this video. It's admirable the way you handled that person's comment towards you. I also appreciate the knowledge you offer and share in your videos. Thanks, Chris Lake.

Thanks Tony, for following up with another video. It is very, very helpful! In my opinion, there is only one disappointing aesthetic about this model receiver, and that is the fact you can barely see the meter pointers because the backlighting washes them out. RS should have either made them wider, made them a contrasting color, or put lighting in front as well as the rear. Pioneer's 80 series receiver meters are a wonderful example of great, legible meters.

Thank you Tony for all your time and effort. You have certainly helped many people sharing your knowledge and wisdom with us!

Tony, your knowledge and experience shines through everything you do, this is one voice in over 40,000 subscribers. I always look forward to a new installment here. The world is full of opinions, some valid, many not.

It is worth pointing out a transistor's current gain (Hybrid Forward common-Emitter, Hfe) becomes largely irrelevant in a circuit employing *negative feedback*. Mathematical circuit analysis strongly suggests this, whether this be effectively: Voltage-Series, Voltage-Shunt, Current-Series, or Current-Shunt feedback systems. And of course - this will apply to small and large signal stages. However, be mindful that not all circuits employ negative feedback, but in audio surely they have to be? - to keep nonlinearity down, hence - distortion down.

I very much enjoy watching your expertise. If I had only a third of what you know about these vintage stereos and all their inner workings I'd be happy. I learn something new every time I watch. As for the ones who complain, I totally agree with you that they should ask questions or don't watch it. There are way too many things that are wrong with this current world and it's not worth it to get upset about a hobby for me to get upset. Tony, thank you so much for sharing your knowledge with us!

43:43: Totally agree with you on this Tony... As a professional Engineer myself, I think you do a wonderful job of balancing a learning experience and a technician discussion...

Tony, you are doing an incredible job with these videos, truly a service to the community. I got in to the hobby as a result of watching you (and others) and am now on my third vintage receiver restoration. I enjoy the thought process, the learning, the actual work and the end results so much. Really, your generosity, patience and time in passing on your knowledge is an incredibly precious thing and sincerely appreciated. And you come over as such a decent and thoughtful guy too, especially with your comments at the end of this video. Please rest assured that the time and care you put in to your videos is hugely valued - and has certainly brought me a lot of calmness and enjoyment in a world that has never seemed so crazy. Thank you.

Keep on working and making videos in your style - I'm not an engineer and have just a little education about electronics in school (and the most of that was energetic electronics, power devices and circuits), but repairing amps are mine hobby and I learned a lot by myself and a lot from the internet. You are talking very understandable to the most of us - HiFi repair enthusiasts.

There are different styles of learning that perhaps this gentlemen could explore on RU-vid. All of us interpret information the way it is presented, but, the more we are exposed, the more information is retained.

I ALWAYS pick up useful information from your vids. In this case, the not-so apples/apples comparison of data sheets. I have an electronics background but not in the area of stereo/amp service. As a now-enthusiast, the more I learn the more I realize what I don't know. Thanks for sharing your knowledge.

Tony you are a reel gentlemen. I hope you will keep showing those greats videos of yours.

Tony I can't remember on the 2080, but on the STA-2100 the Bass Mid and Treble are set to max when calibrating the watt meters. I worked at the QC Lab for Realistic in Fort Worth from 1976-1982 and used to do the rigorous quality control and comparison (with other brands Sansui Pioneer Marantz etc) on these units. We put up a STA-2100 at full power along with competitors equalness for 7 days 24 hours a day and all failed except for the STA-2100. (Toroidal model) The STA-2100D IIRC went around 5 1/2 days where all competitors units failed somewhere in the 4th day or before. People even today don't realize just how well these were designed and engineered. Thanks for posting these vids they are top notch to anything else on the subject.

I noticed the same comment on the earlier video, and the viewer’s frustration was very evident. He expressed his frustration as anger at you. In the comment relating to this video he is expressing the same frustration as an attitude that ‘other people’ have ‘better stuff’ than he has. Now he is feeling inferior. Hopefully, over time, he will learn enough that his confidence grows, and he feels better about himself. THEN he won’t post such awful posts, and might become a great teacher. The thing about human beings is they (or ‘we’) have such great potential for good as well as evil. He will learn more efficiently when he doesn’t beat himself (and others) up so much. Edit: Perhaps it would help him if you asked him what ONE THING he didn’t understand. That is, ask him to analyze his own response and identify ONE THING he needs to learn. As you say you did with the question about hfe. Just a thought 💭 . I feel the need to help him objectify his ignorance (and modify his behavior). I admire your restraint in not responding in kind to his emotional outbursts, not everyone has your constitution or patience. And, as you say, you’re not presenting a course in basic (or advanced) electronics, you’re sharing a hobby.

I guess you can't please all the people all of the time. Like Tony said "if you don't like it, don't watch it". I say don't try to change people 'cos you'll be disappointed most of the time. I only watch channels I enjoy watching. This is one of them. Great content and Tony always does his best to explain what and why he does things a certain way - you can't ask for more than that.

Horrible "Engrish" in the letter, and they need to try decaff. With that said, I consider videos like this entertainment, not educational. Tony, some people have anger issues, and you can't make everyone happy. "That's a crime" LOL, the dude needs to calm down. Keep smiling Tony, and keep up the good work.

Tony, you do an excellent job with these videos…. I have to say that I don’t know one darn thing about electronics, but I watch every single one of your videos, because I find it extremely interesting that somebody knows this stuff, and I try to follow along. So keep doing what you’re doing because no matter how sunny the day is there’s gonna be a black cloud out there somewhere. God bless.

I dont know how you deal with the negative stuff Tony. I have learned so much from you over the years. Thanks for your videos! Thank You, Thank you , and finally Thank you!!!!

Hey Tony Nice work on that receiver. Really impressed.

To say your method of explaining circuits is clearly understandable would be an understatement. I say that with a very limited education of basic electronics but with daily need for understanding Ohm's Law. Thank you for taking the time to make these incredible videos.

Thank you Tony for your time explaining the methods i got it 👍

Thank you for your time Tony, there is homework to be done when it comes to transistor substitution. There is a comment below about No universal reporting/testing standard. If the industry titans could come together and hammer out some kind of agreement, that would help...but here we are about 70 years down the road and still trying!

Tony, you're a good egg! Thanks for the education you give us every week. Experience is a lifetime of endeavors we chase in our exposure of what we want to do. Love it love it!

These are my favorite type of videos from you!! Thank you!

Tony, your videos are always insightful and I always look forward to when you post.

the longer you stay in the weeds, the more i learn. you can go in way deeper if ya ask me...thanks for everything

Excellent Q&A session. Excellent teaching by you to go back through the information for those folks that did not understand it from the first video. Kudos!

Thank you Tony, I rarely leave a comment but I thoroughly enjoy, and fully understand your videos. Once again, Thank you. Phil, Sheffield, England.

Great job, well done. Thanks, Jay

Just want to say i enjoy uour videos and am trying to reteach myself about electronics from not messing with them for the last 40 years. I need a retirement hobby and have old vintage stereos that need repaired and have learned a lot from you, although some of the engineering stuff goes over my head. I too tend to ignore when some of the RU-vidrs do stuff thats not right and some i have had to unsubscribe from, but if its something i am not proficient about i will just ignore the error in their ways, lol. Keep doing what you enjoy and i will keep learning since we are never to old to learn.

Tony, you have helped me and is a great teacher and guide for retro HiFi gear. I stared with this hobby after seeing some of yours videos, early pandemic. I have services several receivers and have managed to repair utints thanks to you. Keep up your excellent work av superb videos. Wish you all the best. From me in Sweden 🇸🇪

Tony in addition to watching your videos i have a library of books and read each Day to find answers to my questions. Thx for making this follow up video it did ans a lot of my questions.

i get what you teach on your channel. thanks for all you do and the time you put into your videos. rock on.....

Thanks Tony. Very good info, and helps me to understand the Hfe ratings.

That 'a ha' moment is why I watch your videos. Thanks for those, and all the fun stuff (eg. tonycad) is a bonus. Keep on trukin!

Thanks for all your information video 😊

Hi Tony U make a creat inspiration for all, I always look upp for u. Carry on. 😊

thanks for your effort keep up the good work if I do not know things I can learn. I watch your and other videos to learn what I do not know I do not know about. sure it seems complicated especially knew stuff for a while but the practical demystification you demonstrate is very encouraging. I do have a question or a request .could you demonstrate how to trouble shoot and reverse engineer circuit that you do not have any documentation on ie schematics or service docs. the tricks you do not know you do are always insightful and often different from others. there is so much stuff out there that is used and could work without any available docs. of any kind. some people just want simple directions on how to fix something me too but it is not always available so I have to try a figure it out which is very rewarding when it works!! don't give up yet!

Nice follow up man ! Like the meter adj tutorial too, and I just ordered one of those little sig gen kits. Tired of using phone app.. the sig gen is needed. Thanks as always :- )

I have not looked at the previous video yet, and I will. Those Sanken “bat winged,” transistors are awesome. The really are power hungry. They used them in the d240 and 400 from ARC, which was the most analog sounding amplifier I’ve ever heard, “so close” to tube sounding. Nice work. Keep those old good ones.

Another lesson in electronics, humanity and common sense. Well done Tony!

thanks a lot for this upload!

No le pares a esa persona Tony, a mi me parece que lo haces, lo haces muy bien y con el fin de ayudar a los demás. Me parece que eres uno de los que mejor explica los procedimientos de lo que haces, sigue adelante. Aparte que he aprendido de equipos de rayos X contigo jajaja. Es echando broma....😄😄😄

God bless you!!!

ThankYou for sharing good content.

You do a great job Tony. You are highly skilled and very entertaining with a great sense of humour, don't listen to the hater. Mike.

Sadly, you can't make a video that is going to match every viewer's expectations... Every person has a different take on what they expect to see... It's called being an individual.... If you don't see what you are after regarding information then find another video that does.... Don't rubbish the technician. Tony..... I have watched and enjoyed many many of your videos. I am not bothered by what you are repairing but rather the approach and techniques used.... For me... This is the reason I watch.... I work with analogue equipment as a hobby build valve amps so seeing the digital equivalent is broadening my horizon. Don't let the negative thoughts of viewers distract you from your good work..... Regards, Trev.

Thanks for the explanation Tony. Very helpful. FYI currently I'm working on a pioneer CD player that reads the toc, but fails to play. Adj I could do with the service manual seem fine. The only thing I've yet to try is adj the tangular (forgot the correct word) to aim the laser. I'm still learning at 49. Best of luck and thanks for sharing your repairs.

Good job Tony!!

Thanks!

13:36 - I look forward to a comparison of those transistors on that old curve-tracer of yours! (if it's up to the job)

That Frustrated person has 0 content on their channel, not even viewable playlists. As much as I would attempt to give this person the benefit of the doubt, the large amount of similar types of people (as I've noted) who only complain and do 0 for any community are not worth my worry in any form. They tend not to listen or understand anyway. If they did want to learn, they wouldn't be that way. They'd actually ask that all important question, "Why?'

Hey Tony. Just want to say Don't let the naysayers get under your skin. It's not your job to hold their hand. Everybody makes mistakes and that is one of the reasons I watch your channel , you're not afraid to show your screw-ups. Richard from Learn Electronics Repair is another I enjoy for the same reason. I think that it adds a personal touch and some intimacy. It's just like being at work with the crew and we can have a giggle about it and maybe some good humoured ribbing as well. I wish some of the other tech. channels would be the same rather than editing out the screw-ups and pretending they are flawless. Take care and keep up the great content as you've been an invaluable help with my own projects .

If someone needs gear starting out. If they live in Canada or the USA i will ship them enough to get going as far as learning. I do this with no strings attached and supply other items along with a multimeter and soldering station to get someone started. Im retired and young and buy extra gear for people who are serious about getting into electronics as a hobby. If you read this tony and want to pin it, i have enough stuff to set 2 to 3 people up with a beginners kit i wish i had. It wont be a fluke meter but itll be something i paid close to 100 for and i have a t12 station or 2 and tons of ics and microcontrollers and leds (as i have over 100k haha) along with breadboards and perfboard along with a simple psu thats adjustable up to 24v. My email isnt hard to find and just put the title as need gear or something and ill get back to the person immediately. I buy extra stuff to give away to anyone who cant afford to get started and theres no judgements or strings attached except for my enthusiasm to find out how i can help. Im not lying and i believe in helping anyone i can. Ill even send a small amplifier and speakers.

I say you explain things very well and even go out of your way to show how things work and where you can find this and that ... to that one person I like to refere him / her to LER (Learn Electronics Repair from Richard) he has lots of video's where he goes deep in to those things drawing it out and makes experiment circuits to show you very good bloke and channel... no need to be all angry and frustrated use your mind and the search function of youtube and google or bing or what ever and you will find what you are looking for.... but now my 5 cents.. when you are not able to understand the basics that tony is showing here then you should not even considering to be in the electronics it is too dangerous to just get in to it without the basic knowlege .. then at that point I suggest you take an real electronics class and learn the basics

Love your videos and all the info I’m learning from you, I’m no stranger to this stuff, I’ve been messing with this stuff sense I could walk, but now I’m learning the right way to go about it, I’m retired from the automotive field, electrical was my specialty, I have a question for you on the sta 2080, I picked one up for 20 bucks at a goodwill last year, it plays great, the only problem it has is, it’s lacking a little base in the left channel, and the left vu meter pegs out really easy, dc off set seams on target, a starting point? Should I do recap and test things along the way first? Or just start looking for the trouble section first? What say you? I have many vintage stereos I’ve repaired that were already broken and turned out nice, haven’t worked on anything with performance issues except my pioneer sx 880 and a recap took perfect care of that, thank you for being there for us, please keep them videos coming, I love learning new stuff always 👍🏼😎

Douglas self has explored the gain changes of power transistors and the effects of beta droop in some of his books if anyone would like dig deeper.good overview on comparing transistors

Hi Tony, This is a great clip. You explain stuff like a great teacher. If you can find a link to that sig gen, please include it. Looks like something good to have. Thanks

Counterfeit: there's also the category that you buy a small JFET, and the part number is telling that, and says its coming from Texas Instruments, but when you test with all the gear you can find for it, it all tells you it is a small gain NPN BJT. Every of the 50 you bought.

I like to replace the power cord with a polarized cord. On this unit, they have a 2.2m resister from one side of the power cord to the circuit group. I like to make sure that the Neutral side is grounded to the chases.

That's professional jealousy man. There seems to be a little envy with regards to the great gear you have. I've never had gear envy. I love seeing gear i dont have and you worked hard for that. Tony i used to work with a hutchings girl that her husband did the same thing as you. Hes always in the states and such fixing ge medical equipment.

14:30 - I'm guessing ther's a bit of marketing thrown in there, too. Those high-voltage transistors were targeted towards those that built amps >=400 watts/channel.

so with gain changing with current, does that imply then that there would actualy be some performance gain, beyond power handling, from these designs with multiple output elements in parallel? i have always assumed such designs were just hifi excess.

sir i don't see videos on mosfets output stage amplifiers ? Really want to see how to do mosfet biasing setting .

Can someone help me to find the video explaining how Tony removes that glue under caps. Something with vinegar and……?

please release the "unreleased video"

You kept N pounds of good vintage equipment from being E waste. It lives again. To the rest of us mortals it ears sounds fine. You educated a few people and entertained a few people. Given that the market is no longer producing 40-60 year old semiconductors your choices are limited. It isn't like you have a Narnia parts cabinet that hoovers parts from the past to the present in your shop. You did more than the poo thrower. Invite them to view elsewhere.

I run a small blog with mostly electronics, I only get nice comments or polite questions. I guess angry people don't like reading and would rather watch RU-vid? I've seen some videos where the person doing them just had some things wrong, but had the right intention. If there are no other comments pointing to that error, I will try to politely tell them what's wrong, since it will affect other people as well. If the whole video is wrong then there isn't even a point in writing a comment.

I have the exact same unit STA-2080 i bought in the early 80's. My unit works perfectly as long as i put a match box under 1 of the corners. If the unit sits flat on the table i loose one of the channels. Obviously i have a bad connection on one of the boards. Can you give me an idea where im loosing the connection. Thanks Mark

Hey Tony, where did you get the adaptator BNC to double RCA jacks ?

Any clue as to who made this unit for Tandy?

Hi Tony I also wanted to add that the meters on these units are not to be called a novelty by their design, The reasoning you notice almost all high power units the scale will get tighter as the wattage increases is pretty much accurate because in theory the more total distortion the less they will "bounce" and become "fixed" as they loose that headroom in the sound that give audio its "live" presence. If you notice the printed scale on the meter will begin to tighten as it reaches it's rated power AE the less bounce the more distortion visually. This is by design not a novelty. Again your work is top notch even I don't know everything but we continue to learn.

Thanks!