1957 Telefunken Opus 7 Repair & Bluetooth Mod
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- Опубліковано 22 лис 2023
- UPDATE:
I’m running a 3-part live workshop that takes us on… ’A Time Travel Through Vintage Electronics’
We’ll dive into the tech of the times, from the 1950s all the way to 2020s.
The dates and times are still to be confirmed. But if you're reading this, then the workshop hasn't yet taken place.
If you're interested and don't want to miss out, you can sign up here:
menditmarkk.ck.page/6e8fbd9521
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Mark repairs a 66 year old Valve Radio, made by Telefunken in Germany. It was certainly a high-end item in its day, but had acculated quite a few problems over the years. Mark also installs his Bluetooth Interface Board inside, bringing it into the 21st century!
I want to try something new. Something more live.
So I’m running a 3-part live workshop that takes us on…
A Time Travel Through Vintage Electronics.
We’ll rewind the clock, dive into the tech of the times…
(and study the very history of how things were broken and repaired has evolved)
From the 1950s all the way to 2020s.
It's still just an idea. The dates and times are to be confirmed.
But if you're reading this, then the workshop hasn't yet taken place.
So if you're interested and don't want to miss out, you can sign up here:
menditmarkk.ck.page/6e8fbd9521
How on earth did you acquire such intricate knowledge of your subject Mark? You surley must have started when you were very young. With your enthusiasm for the work, you make it look so straightforward but to be able to identify faults amongst such a hornets nest of components is a truly gifted talent. Your videos are an absolute joy to watch.
The confidence of Mark is unbelievable, an example of an expert who smiles when something goes wrong.
Always a great night when Mark gets a new video out!
Yes indeed !!
Especially as it’s an hour long
bro it sets up my whole evening, sit down and watch MendItMark with a cuppa - love it @@king_ofgames3650
The best way to go to sleep !❤
IKR@@PuiuM3u
There's nothing like the glow of a magic eye. Brought back memories of when my late father used to repair these. Thanks Mark
And his Jap's eye as he waved it under your nose.
Reminds of my childhood. The sound, the smell, the broadcasts. Great piece of history.
You made a fantastic job of that Mark, especially with the Bluetooth added to it.👏👏👏👍
I know nothing about electricity or electronics, but these videos are fascinating! Thank you Mark, always a pleasure!
i know quite a bit, but it facinatings me too 🙂
What an absolute gem to restore to beyond it's original capacity. Awesome work Mark
Donnez-vous des cours?
Je rêve d'avoir un si bon enseignant ici en France et avec toujours une si bonne humeur 🙏🥰🇫🇷
A lot of the German made radios had a lot of features like this in this era. They were made so well too.
Lovely radios when you get them going. A lot of the paper caps and electrolytics in the filter will be needing replacing in these, but it is always good to see some proper trouble shooting done instead of just wholesale replacing the capacitors. A lot will be like this one and not operational due to the capacitors and sometimes resistors that drift in value. Those old paper capacitors go acidic inside and the paper breaks down,. They basically turn into resistors internally, which is why a lot of restoration channels will just replace all paper caps. The "Black Beauties" are also paper and foil inside. Guess it is hard when you are doing it for a customer to know how far to go as it takes time.
The Ferrite rod in this likely originally had rubber mounts and plastic brackets that held the ferrite rod in place. Epoxy will stop it moving for a while.
I usually put the bluetooth on the tape input on these when I do them. That way the bluetooth only works if tape input is selected. I designed my bluetooth module to run off the 6.3V AC heater line rather than adding an extra transformer :) There is usually plenty of power available and the bluetooth takes very little current.
If you ever need dual can caps, they still make them. I service tube amps and regularly order them. Usually from Hotrox or Watford valves. JJ, F&T and ARS are all decent and always available. Excellent video, as usual!
Mundorf make twin caps with a common ground pin too. Think it's the MLytic HV range.
It’s a real joy to watch someone with such competence go about doing their work.
31:58 Your initial repair brought Hall & Oates back together! Love your channel. Cheers from Canada!
Best electronics repair channel on yt by far. All the best Mark.
Mark makes working on electronics like tying shoes. He has such a positive demeanor when approaching a electronic problem. If only World Leaders be more like Mark 😊
My late Father had 1 of these radios at our home in Essex...I think it was Bush but looks identical. I am in awe of your knowledge, skill and patience.
Great to see another cheery journey through old tech with Mark. Great content - thank you!
You cannot beat UK electronics engineering channels, so relaxing and informative. Big Thumbs Up.
As always, a pleasure to watch Mark. You really brighten up my day. They sure don't make them like they used to, in many ways it's so much easier today.
In the mid-60s, my parents had exactly this Modell.Es was in our living room.I did an internship as a radio and television technician in 1976 and repaired the radio more often than it was defective. Greetings from Germany.Thank you great video
Mark has steady hands laying those micro parts in position. Amazing intelligence Thank you.
its unbelievable how the circuits were constructed without circuit boards it all hangs in the air .. brilliant repair!! nice work
I remember as a teenager in the 1970s being given a Grundig reel to reel tape recorder . It was enormous and the most complex mechanical and electrical monster I'd ever seen ! It was built on a cast iron chassis , and all the piano key controls operated solenoids that in turn pushed and pulled all the various pinch wheels etc on the deck . It had a total of 8 valves ( tubes), and a huge finned selenium rectifier on the power supply unit.
It was only mono , but the built in speaker was huge, and the microphone was a very heavy ribbon type. All it required was the heads and pinch wheel cleaning and it worked perfectly.
The neighbour who gave it to me said it was from the very early 60s ,and cost the equivalent of around £ 200 when new ( bearing in mind this was 1971 and a new Ford Escort was about ? £750 at the time!
What a clever chap you are Mark. Even thought I don't understand electronics I still really enjoy your content. Brilliant!!!!!
And me. 99% of the time I have no idea what's going on, but that doesn't mean I don't find his repairs/restorations fascinating! Mark certainly knows his stuff.
Man, they don't make 'em like they used to... and good thing too. The transistor completely transformed electronic gadgets and made today's computers, internet etc, possible. Another great video. Excellent presentation and technical knowledge as usual. :)
If I had that radio, I'd just have to try those speakers with a stereo amp and hear what they sounded like. Imagine stereo sound from that classic radio!
I don't think I have ever witnessed a better electronics repair job ... Outstanding , Mark Cheers
Wonderful upload, thanks Mark. I really enjoy wizards like you bringing these old gems back to life.
Fantastic Mark one of the more challenging projects you have done and certainly one of the more interesting ones too. It amazes me just how knowledgeable you are nothing seems to upset you and you keep coming through with results. keep the jobs coming Mark you have a very loyal following we continue to need a "fix" from yourself. Take care.
Brilliant. An old Opus repaired and upgraded with Bluetooth! ❤
Mark you make it all look so easy. Great work once again.
What a cracking piece of audio furniture! Nice video, Mark. 👏👏👏
Absolutely love watching your videos Mark! Skillset is off the scale and also learned a few tips and tricks!
You really are an amazing technician. Love watching your videos.
Mark, in the early sixties I was an apprentice Radio and TV engineer. The two contact cleaners the company used were cans of ‘Servicol’ and a smaller plastic bottle of ‘Electrolube’ (“Go sparingly with that it’s a pound a bottle”). Does either product still exist? Great channel Mark 👏🏻👏🏻👏🏻
love watching you work, and i am surprised how accurate the VFO was with all those old caps
"Thanks(for)giving" us another stellar peak into your brilliance in the workshop.
Amazing radio. I have the 1956 American version, different colors and the 4 smaller speakers are mounted on the side. Still all original, still gets played a few hours a week. 😊
Mark, what can I say? What a fantastic vlog, full of so much content and skill. We'll done, I always look forward to seeing your work. Wish you could be more frequent with more posts 👍👏👏👏👏
Greetings from Wombourne, I enjoy your work and have watched many of your videos, always a pleasure. I,m glad none of the caps exploded when you juiced it up.
28:42 I was surprised the coupling capacitor for the bass speakers wasn't a non-polarized type.
All-in-all a fantastic rebuild. It seems when you fix something, *it's fixed!*
You can use non polar caps for small and large signal coupling with no issues, as long as the offset voltage across it is a good bit lower than the cap's voltage rating. Polar coupling caps will introduce a tiny amount of distortion... In this old radio it wouldn't be measurable compared the amp and speaker distortions.
Wish I had the electrical skills of this guy very few people any where have this talent.
Great video! Those old radios sound wonderful!
I have a Philco Transglobe that I enjoy listening while having my 5 o' clock tea!
Omg I just found your videos , my late father use to repair TVs radios ,all those names and the components you mention brought back so many memories of when I use to watch him as a child ,im now 59, btw your knowledge is amazing how did such a young guy learn all about these old period sets , thanks great watching on a Sunday afternoon
Wow! What a stress buster to watch Mark fix things up. Highly optimistic. Thank you so much. 🎉😊 Good luck and best wishes to you and yours.
Always find these videos soothing.. a professional doing a professional job with utmost pride in his work, and some bonus ASMR from the various screws and stuff being removed 🙃 Really high quality content.
Stayed up till after 12 watching this. Lovely piece of kit. Well done on the fix Mark as always. Keep 'Em Coming.
Bravo you have given the magnificent old radio a second life.
Great Mark, i follow many restorer but you're my favourite. Thumbs up
This was a great video. I love how you got this old beast to play smooth music.
I learn quite a bit watching these. Thanks!
Questi sono i video che più mi fanno amare sempre e per sempre l'elettronica, ma questi video di restauro su valvolare sono eccezionali.
Grande Mark 💪🏻💯👍🏻
Most satisfying. I love those sound from those old radios.
Dude, your work on the jam box 📻 was amazing. The fact that you customize pieces - so cool!
Superb video Mark, enjoyed immensely
My dad won one of these in a contest in the 1950s. I used it the most (dad had a tin ear), and this brought back a lot of memories of listening to this gorgeous machine before real HiFi came into vogue. Now all we have are smartphones and bluetooth ear buds. Blah.
Glad to see that you’re doing another video Marc this device looks like my father‘s Grundig blue spot radio that I still have too this day
Beautiful radio. Nice work mate.
its all well over my head but I can see just how smart and talented Mark is at his trade, well done Sir and cheers from NZ
Nice job Mark.👍
Thanks for sharing your know how, and taking a 60+years radio and give it one more life of making music.. and demonstrating at the same time how precious thes old technologies were.. and they were within reach of the people who wanted to learn about them and repair them, right at the corner of the street, nearby.
Now, try to open any recent Dac or Streamer and see if you can get it to work again.. my EAD Dac just died, and no one can repair it.. sigh. Thanks Mark! 👍
Flipping awesome! Thank you! A lot of fun watching.
Superbe video!!! I am an old man and I remember these. They were expensive and very good. Cheers from Patagonia. Argentina
Fantastic sound quality in these sets. I have an old 1957-58 Philips that needs attention when the time comes, (and courage) to put my fingers in it as i have next to zero experience in tube/valve stuff. Excellent video as always, i just love to watch your work!
You are so cheerful even when faced with a mess of failing capacitors.
Great job Mark. I restored an old Selmer amplifier recently and Watford valves had quite a few dual can electrolytics in their stocks.
Very cool... I grew up with one of these as my introduction to music, in my parents house...early 60's.. that magic eye always fascinated me when it was on... it was like something from outer space.. It also had a peculiar, (to me) smell... Sounded pretty good too from what I can remember... & it's probably the main reason I got into music & became a bass player. Great job Mark... I enjoyed every minute..
Love your videos Mark ! Many thanks from Canada
Great to see you back - really enjoy your content👍🏻👍🏻👍🏻👍🏻👍🏻
Beautiful work, Mark!
Throughly enjoyed that, so have now subscribed, thank you, takes me back it!
Enjoyed every second of that. Thank-you Mark.
your restoration makes me happy
My Mrs recognises the opening music when I start a video she always makes me go back to the start so she can see you get a shock 🤣
great work as always Mark, keep it up 👌🏻
That took me back a few years. I used to sit with my Grandad in the early 70's and watch him "repair" old broken radios and anything else he could get his hands on, he never had the electronics you have, just screwdrivers, soldering iron and a hammer 😀.
Brilliant stuff, liked and subscribed.
Amazing!!!! You almost did that radio again to bring it back to life!!! Now it is a Markefunken!!!
This is so awesome had one of these as a kid they are built amazingly
bonjour de la France mark ,je connaît strictement rien en électronique , quel patience ,et quel savoir faire ! vos vidéos sont excellente et passionnante a regarder ! tu a gagné un abonné.
Congratulations,friend Mark. I from Perú.I dont speak english. Y me gusta como abordas las reparaciones,con tu carisma y toda la instrumentación profesional. Dios te bendiga. God blessyou.
Nicely done with the radio.
Watched this with fascination, because although I'm not technically minded, the assurance displayed here made compulsive viewing. I do like restorations, and this one fitted the bill perfectly. Thank you Mark.
I've got a Grundig looks just like this with a runaway volume problem. Looks and sounded great until that happened. Surprising how good it sounded for its age. Shocked it still worked. Good to see someone so skilled keeping these going.
That's my Friday night viewing all taken care of. This is a nice long one, roll on Friday.
Bloody brilliant Mark!, great job. What a skill set you have!
Excelente video, saludos desde Tegucigalpa ,Honduras
I can smell old electronics and melting solder resin from here 😄
Me too, and I'm in Melbourne Australia!
Greetings from the distant land of the left coast of the colonies. You have an incredible knack for troubleshooting followed by the ability to rectify those problems! That’s not even discussing your excellent video and sound quality of the videos.
That's what I like about old radios, you look inside at a wonderland - unlike the single chip and one or two surface mount components I have seen on modern things, they have no soul. Most enjoyable, thanks for sharing.
Well done Mark saving something ending up on scrap heap I am a bit like you I try to repair them if can to much ending up on the dump good video great repair
lovely sets, i had one and i wish i'd never sold it, great work as always
All the best to you and warm greetings from Germany
That was amazing!! Thanks for Sharing Mark...
Your knowledge, skill and cheery banter make you one of my favourite you tube channels! Thanks Mark!
Mark,you are simply the best.pleasure to observe
You're a clever lad.😊
Great work Mark. Fingers crossed it settles down OK!
Brilliant to say the least! What a guy! Marvelous to watch!
Fantastic video Mark, as always. Please dab in and get your backlog cleared, I’ve got a USA Fender amp in dire need of repair and I will only trust you to fix it. 😊
I’m fascinated by this, there used to be a fantastic wood cased radio where I served my apprenticeship it had a round front with big wooden louvres and a vertical tuner array along with the magic eye. I used to think about replacing the internals with some modern hardware and have a radio with what looked like a 1940’s American car grille.
first class work Mark,well done..and a really nice piece of vintage radio..great video.
Lovely looking piece of kit