As an ex Radar tech and TV repairs I am speechless 😊 I always thought the line output transistor liked a load ? I was amazed when you powered it up with the flylead under a cup ⚠️ Perhaps the original fault was poor vertical hold and the jet wash water killed the transformer ! What entertainment watching this Channel . Keep up the good work Mark.👍
You are brilliant, Mark! It is so rare in this day of specialists to see a true Mender at work. Everything from coil winding to fabricating replacement parts for the structure; whatever is needed to return a thing to usefulness. You are talented to the extreme, yet very pleasant to see and hear. Time spent in your workshop is pleasant indeed. I knew one other like you once (my father), so I've seen enough of this to know what you are doing and how skilled you are. He told me that when he was a boy, the only toys he ever got were the ones that other kids had broken and discarded, so he starting fixing things early. I wish I would have learned more from him. I see that same level of confidence in your work, and in the way you approach and analyze things.
Rewinding a transformer. Brilliant. That monitor was in excellent shape. No burn in, good colors, and geometry was nice and straight. Moving the convergence magnets around is a beast so lucky it didn't need it
I had a company back in the 90's in the UK and we used to repair many of these, along with the 9000 model. We originally bought the replacement LOPT's from the manufacturer 's, but they were expensive. I don't recall how, but I found out who actually made them (italian company I seem to remember), and as we had a good relationship with CPC (now farnell) I gave them the details, and persuaded them to stock the item, and of course the wholesale price to us/everybody came right down, and I think they sold bucket loads of them. I seem to remember, if the LOPT went short circuit, the big resistor 220R used to burn out as well. (330R on the 9000 model). Hope that helps.
Enjoyed seeing a repair on a CRT, takes me back 30 years in my early career,,,occasionally getting a belt from 1/2 live chassis on old TVs and monitors, to my Dads delight when I worked in his TV and audio repair shop at weekends during my formative electronics studies...Good job
The odd unpleasant 'belt' or two is/was the best way to gain respect re. old CRT sets. They can deliver a very nasty 'bite'. Early sets with mains derived EHT could be lethal. It is foolish to mess with anything you don't understand. Nevertheless, we all have to start somewhere, and we have all made mistakes. It is just part of the learning process.
Great to see someone carry out an actual repair as opposed to condemming it due to age and the inability to work just that little bit harder. Great work, loving your videos and I am watching as many as I can.
Fair play Mark old school technician, this is how I started my electronics life doing bench repairs, but that winding machine is pure class and still does its job perfectly
Ah, the good old, (scary!), days. That coil winder is a real beauty. I remember the second T.V. I worked on. I was looking inside at switch on and a cap blew up in my face! I hide on the other side of the workshop too now! Still lots of tube stuff to fix but the CRT anode HT was always a great teacher of respect. I think some of the last big CRT's were up around 100kV. Thanks Mark.
Ahh...EHT! Gotta hate it! I was almost hoping you'd cop a non-lethal 25kV zap after seeing your reaction to one in your intro video! - It certainly got your attention! As has been said, the 128V HT rail would normally have a 240V light globe hooked across it during testing, as a load. At least that's what I used to do back when I was repairing gaming machine monitors! 'Tatung' brand monitors were used in Aristocrat poker machines back in the day. The heatsink for the vertical amp chip was too high to fit under the curvature of the picture tube, so the manufacturer cut it in half! Then they usually had very poor heatsinking, as the pins of the chip were really too far away from the mating face of the heatsink, & the chip would not be flush & square. Overheating was very common, & all the components in the vertical section would get overheated. So I would mount all 6 or 10 'vertical section' components underneath the pcb away from that hot heatsink! I would also elongate the holes in the pcb that the heatsink was soldered to, so that I could move the chip closer. There was enough room in the top of the heatsink to fit another small, multifinned heatsink to it with double-sided aluminium 'heatsink tape'. We also changed a few resistors in the circuit so we could get away with a lower HT voltage - & still have sufficient image width. Lowering HT voltage meant less power dissipation in the vertical o/p chip, but it also started to effect the horizontal width. The monitors seemed to be fine after those modifications! This was a relief, as we would have a 10 to 15% failure rate of these screens at first switch-on when brand new! I have one of these monitors at home now, which still works! I got it running & it seems to be just a regular VGA monitor! It was returned to me after a few years use in my friend's arcade machine, when he swapped it for an LCD monitor.
I love how you actually fix and rebuilt things Mark. A real technician's technician. 27:12 vertical hold - that brings back memories of trying to get good reception on the telly in the 60's and 70's
So satisfying to see old tech being brought back to life! Fantastic personality, to the point, and very informative presentation. Great editing too. Thank you so much, subscribed.
Astonishing skill level in so many areas! Is there anything you can't mend!! Really enjoying your channel and the high quality of your videos and your workmanship. Thank you very much for sharing them with us.
Hi Mark, I look at this footage with the greatest fun an appreciation. More than your skills its the humor and positive approach that makes your videos so entertaining. Being an engineer working in the automotive industries for more than 40 Years, this direct encounter of physical and electronics related problems is far away now in my job. So this kind of electronics adventures bring me back a little bit and I remember, why I choose this profession once in a while. Thank you so much for that, take care and don´t let the high voltages "bite" you
I love these videos, amazing electrical / mechanical engineer and a suberb craftsman... really impressed with his patience and skills... there can't be many like him left with our disposable society. ⭐⭐⭐⭐⭐
I have just discovered this channel. I used to work in the trade, back in the day. 20 years ago now. I consider myself very competent with electronics diagnosis and repair, but I have to admit I would not even have contemplated rewinding that transformer. However, watching you do it has taught me that it's possible. The winding machine is kind of important, though. I was chuckling often at the very healthy respect that was shown for the line tranformer output, and even the self recharge capability of the tube. That is the kind of respect that can only be shown by someone who has worked on these long enough to get a jump off one. And I've been there, and I am frightened of the HT cap in _exactly_ the same way. 😂 This was an excellent repair.
amazing just amazing i never thought i would see a electrical repairer even attempt any thing like a re-wind well done to you every tome i see a new video of your i hope its the repair on my receiver
Another great video mate 😃👍, the "helping hand resistor" access the b plus regulator is common in monitors, ive seen those regulators shorted a lot of times, a dead give away before you even open her up is the set will power up at lower voltage on the variac but cuts out as you increase the input voltage and the xray protection circuit triggers...
I’m subscribed to lots of fixing it channels like this but I’ve never seen anyone able to repair things to such a level as you do. I’m watching in complete disbelief. Incredible…. Andrew
I haven't seen a TV repair since 1985. With the dot bar generator, too bad you didn't degos the the picture tube. It made the phosphates come alive with color and the fine tuning (or alignment) was finely tuned using the dot bar generator was for. Chroma-alignment, after all the years I'm watching this and I only did one in my entire life! In Jr. High school with a friend back then name Seth Isenberg I think? Anyway we were hanging around and watching a Zenith TV 25" color. I notice the chroma-alignment looked whacky so I offered to fix it. At that time period the TVs (25" color) had a minnie dot bar circuit card you could mount it on 2 screws so you could use them to blend the colors to a white line out of primary colors. I got caught and never did one ever! You really hit a nerve with this episode! Cheers!
Loved the anode discharge bit- I always did it the way Mark did, with a lead. I was accused of being soft by the other blokes in the workshop who just used to cross a couple of screwdrivers to short it!
Mark, as someone who has undertaken monitor repairs onsite, including in public spaces, I am in awe of the work you do. We used to swap out driver and scan boards and then repair the boards back in the workshop. I cannot believe now that I would take the back of a terminal, sometimes on the reception counter of University libraries - Defo less H&S rules around then! Fortunately for us we worked for the system manufacturer (Cifer) so was able to source all new parts so I have never had the joy of rewinding a transformer. I've dabled with LCD TV Repairs and retro electronics but hoping to do more once I move house and setup a better workshop. You and your setup are an inspiration sir...
Skill! I did a similar but crude repair to my brothers central heating boiler. The gas valve was open and the gas supplies shops- not plumbers- wouldn’t sell me one because I wasn’t CORGI. Registered. I’m a lift technician, or was in the early 70’s. So, I took the potted core out and dismantled it substituting the coil with a varley one, rewinding it onto the original former and re-potting it. With tar. Worked a treat! This of course was pre snowflake times and my little brother was training for his P1/2 exams. He’s now a multi millionaire and lives in France in an old Mill! So, study accounting and you can retire at 50!
This kind man never ceases to amaze. In addition to having a very well-equipped laboratory and workshop, it turns out that he is soldering the varnished copper cable and I say to myself: "Doesn't he remove the varnish? And as soon as I finish my thought, he says it! Greetings from Argentina. ps, translated text listen to Google. sorry
I worked on stuff like that for 40 years. The fast and simple way to start is to check the collector of the horiz output transistor for a short. If no short connect power to the monitor and check for B+ voltage at the collector of the horiz output. If ok the drive signal is likely missing. If no B+ go back to the power supply. That transformer you repaired is the horiz drive transformer .The horiz osc comes from IC 2 to the base of TR10. Another thing to be aware of when you work on monitors like that is they may require sync from a video signal to turn on the horiz osc. NO video signal connected the monitor may not come on.
The fibrous winding tape, may just have been what they had, or it could have been to cut down on the noise. In my youth I could hear a flyback transformer, which is up there north of 15KHz and CRTs annoyed me - the fibrous wrap tape may have helped to quiet that. And I have to give a shout out to my old friend the Keithley 236 SMU - a brilliant piece of equipment, used it for years in integrated circuit testing. Thanks for the video mark, brings back memories.
Not as much as rewinding the transformer, but undoing the thin wiring in a way that allowed you to figure out its turns count is remarkable. Great job !
Watching your videos I've realised why I'm not great at repairing equipment. There is no way I would have suspected that transformer. It's a couple of lengths of wire, what could possibly go wrong with that. I need to stop assuming things. Thanks for doing these videos, they make great watching and are very educational.
You are really great technician! Nice to see a transformer rewind to safe this one! Btw, if the scan coils aren't connected it's not possible to get high voltage, but nothing wrong to cover the anode connector to be sure!
Watched many of your video over the last 2 week and I must say your attention to details is absolutely legendary. I like to get suck in and repair things like you but normally give up at the first hurdle. May be because I only got access to a multimeter these days. Keep up the great work.
I used to remove HT connection from the CRT with a loop of a nylon (kite) wire once round the connector , pull it tight it then should pop out of the CRT without damaging the conductive inner of the glass CRT connection (of course discharge the HT first like you did)
You hate the anode cap about as much as me! Used to hate the things, probably from when discharging one with a massive pop when I was learning!! I've got to recap my old arcade machine monitor soon, can hardly wait!
Looking forward to this one. We had many of these, they were quite good. Eventually, we started replacing them with Wells Gardner monitors which were a lot more robust electronically.
Takes me right back that 😊. The crackle of the eht, keeping one hand in your pocket whilst getting the test leads in. Obviously, we always used an isolation transformer but it was still a bit scary. My old boss used a monitor chassis for re-flocking juke box turntables. The EHT lead "borrowed" from it's connection to the tube, he would wire it to a fine, steel sieve and sprinkle the flock onto a glue-wetted surface. The main piece of safety equipment was a thick rubber glove😂. Kids of today, they've no idea 😂
This is very amazing fix, because you replace ........rebuilt coil for the pilot transformer.................VERY COMPLIMENT FOR YOU THANK FOR YOU VIDEO
So that's how you wind a transformer. I was thinking you were going to weigh the copper to somehow calculate the length of wire to wind the thin turns. Amazing job! 😅
Above and beyond on this one. Rewinding a transformer is something seldom seen but credit to you. I personally keep right away from old CRT kit. It’s usually bulky, dirty and will try bite you 😂. Quite why you would pressure wash one is most bizarre. Nice job on this one though.
I laughed at the microsoft logo at the end. That was neat. I remember we had the RCA black and white in our home and it lasted us a good 15 years without any hiccups.
Brilliant video, never saw a technician actually take apart and rewind a transformer. that winder was really cool. Great work! I subscribed to see more.
Bravo !!!!!! il y a longtemps que je n'ai pas vu la réparation d'un moniteur a tube cathodique, et en plus la panne, le plus difficile a trouver pour un technicien une self en panne (et je sais de quoi je parle !!!), et en plus cerise sur le gâteau "Cherry on the cake", refaire une self, tout un art, tu est vraiment un as !!!!!, franchement vous les anglais vous êtes très fort, dur a dire pour un Français 😄😄😄
wow.. so cool to rebuild the primary and secondaries of that transformer. I love the winding/unwinding machine too. Actually quite easy to build a transformer with the right tools.
athat transformer that you have rewound is the driver transformer for the horizontal output transistor and a very common fault in tube televisions both b/w and color.
I recapped one of these with nichicon FW series caps, I tell you what after doing it the picture was bright as hell and pin sharp, these are excellent monitors.
If it's of interest, 35 years ago at the BBC I was taught to use an incandescent lightbulb to discharge/keep a tube discharged since it gave crude current regulation and a nice visual indication!
Takes me back 25 years now, I was a TV/Video tech from 85-2000, discharging the tube, I'd pull the EHT cap off first, prising off with a screwdriver, then we used to use 2 large screwdrivers to the chassis, CRACK ! No fear back in the day.
Your channel is awesome, definitly earned my subscription! And as others already mentioned, that winding machine is pure class. Big W seeing someone who has these tools.
Awesome, inspiring. Why did I choose computer science and not electronic engineering I will never know (that was 23 years ago mind). I’m a teacher on my school holidays and I can’t help but think your interest started in your old technology classes. I’m binge watching your videos and I think I’m halfway through. Gonna take a little break because I don’t want to run out. You’re everything the BBCs The Repair Shop will never ever be! I’d go as far as to nominate you for a Nobel Prize.
You don't find many techs who will rewind a transformer. This man is an artist.
I was a TV Tech for 40 years and never rewound a transformer. Im really impressed..!
Now you have find the second ;)
I do the same :)
My jaw was just open while he was doing that, very impressive
Mark is not only a tech, he's an electronics engineer by trade.
I wonder if it’s antique and/or Japanese. You can buy identical ones from China. They look old the day you buy them.
Sei in gamba , mi piace molto il tuo laboratorio .Complimenti , io sono Giuseppe .
I never thought I'd see a man on TH-cam winding a transformer for an Arcade CRT. Your attention to detail is outstanding. As are yout tools.
Wow, I've never seen someone rewind a transformator. You have very special tools in your workshop. Great job.
Have you seen the channel called Glasslinger?
@@TechGorilla1987 He makes valve tubes itself. Very interesting channel. Thx.
Glad to see you had no Electroboom moments around that thing.
ابنانية@@ernieschatz3783
مونيتا
Makes his own circuit boards , rewinds his own transformers my god your skills are boundless. im so glad i found this channel
Congratulations Doctor. The surgery was a success. Patient feels like a new CRT now.
As an ex Radar tech and TV repairs I am speechless 😊
I always thought the line output transistor liked a load ?
I was amazed when you powered it up with the flylead under a cup ⚠️
Perhaps the original fault was poor vertical hold and the jet wash water killed the transformer !
What entertainment watching this Channel .
Keep up the good work Mark.👍
You are brilliant, Mark! It is so rare in this day of specialists to see a true Mender at work. Everything from coil winding to fabricating replacement parts for the structure; whatever is needed to return a thing to usefulness. You are talented to the extreme, yet very pleasant to see and hear. Time spent in your workshop is pleasant indeed.
I knew one other like you once (my father), so I've seen enough of this to know what you are doing and how skilled you are. He told me that when he was a boy, the only toys he ever got were the ones that other kids had broken and discarded, so he starting fixing things early. I wish I would have learned more from him. I see that same level of confidence in your work, and in the way you approach and analyze things.
Someone should interview Mark. I would love to know how he gained the knowledge in so many areas. The guy is a genius!!
And he plays the guitar.............
Someone needs to respect others space.
@@Katchi_ 🥱
@@Katchi_ Someone needs to give Mark some roasted toadstools and a glass of dandelion wine (burp, pardon).
@1:11 - The first appearance of the Cliff Quick Test outside of a BigClive video. Splendid!
Rewinding a transformer. Brilliant. That monitor was in excellent shape. No burn in, good colors, and geometry was nice and straight. Moving the convergence magnets around is a beast so lucky it didn't need it
The intro had me. Then it turned out to be one of the most interesting repair videos I've seen for a while. Especially the TX winding. Awesome stuff 👍
I had a company back in the 90's in the UK and we used to repair many of these, along with the 9000 model. We originally bought the replacement LOPT's from the manufacturer 's, but they were expensive. I don't recall how, but I found out who actually made them (italian company I seem to remember), and as we had a good relationship with CPC (now farnell) I gave them the details, and persuaded them to stock the item, and of course the wholesale price to us/everybody came right down, and I think they sold bucket loads of them. I seem to remember, if the LOPT went short circuit, the big resistor 220R used to burn out as well. (330R on the 9000 model). Hope that helps.
Blimey Hantarex . I Used To Install these monitors and repair them for British Rail. They were Everywhere . We did The RTA Clocks As Well.
Sorry R T A Rugby Time Antenna ..
We Share the same Solder Sucker Rs.
Enjoyed seeing a repair on a CRT, takes me back 30 years in my early career,,,occasionally getting a belt from 1/2 live chassis on old TVs and monitors, to my Dads delight when I worked in his TV and audio repair shop at weekends during my formative electronics studies...Good job
The odd unpleasant 'belt' or two is/was the best way to gain respect re. old CRT sets. They can deliver a very nasty 'bite'. Early sets with mains derived EHT could be lethal.
It is foolish to mess with anything you don't understand. Nevertheless, we all have to start somewhere, and we have all made mistakes. It is just part of the learning process.
Great to see someone carry out an actual repair as opposed to condemming it due to age and the inability to work just that little bit harder. Great work, loving your videos and I am watching as many as I can.
Mmmmmmmmmmm, I'm glad to know I'm not the only one addictec to this channel. (LOL)
Fair play Mark old school technician, this is how I started my electronics life doing bench repairs, but that winding machine is pure class and still does its job perfectly
Ah, the good old, (scary!), days. That coil winder is a real beauty. I remember the second T.V. I worked on. I was looking inside at switch on and a cap blew up in my face! I hide on the other side of the workshop too now! Still lots of tube stuff to fix but the CRT anode HT was always a great teacher of respect. I think some of the last big CRT's were up around 100kV. Thanks Mark.
Large CRTs never went above roughly 30kV, because of the risk of generating X-rays.
@@mjouwbuis Also the reason they scaled so badly. 40 inch is about the largest CRT that were made in bulk.
Ahh...EHT! Gotta hate it! I was almost hoping you'd cop a non-lethal 25kV zap after seeing your reaction to one in your intro video! - It certainly got your attention!
As has been said, the 128V HT rail would normally have a 240V light globe hooked across it during testing, as a load. At least that's what I used to do back when I was repairing gaming machine monitors!
'Tatung' brand monitors were used in Aristocrat poker machines back in the day. The heatsink for the vertical amp chip was too high to fit under the curvature of the picture tube, so the manufacturer cut it in half! Then they usually had very poor heatsinking, as the pins of the chip were really too far away from the mating face of the heatsink, & the chip would not be flush & square. Overheating was very common, & all the components in the vertical section would get overheated. So I would mount all 6 or 10 'vertical section' components underneath the pcb away from that hot heatsink!
I would also elongate the holes in the pcb that the heatsink was soldered to, so that I could move the chip closer.
There was enough room in the top of the heatsink to fit another small, multifinned heatsink to it with double-sided aluminium 'heatsink tape'.
We also changed a few resistors in the circuit so we could get away with a lower HT voltage - & still have sufficient image width. Lowering HT voltage meant less power dissipation in the vertical o/p chip, but it also started to effect the horizontal width.
The monitors seemed to be fine after those modifications! This was a relief, as we would have a 10 to 15% failure rate of these screens at first switch-on when brand new!
I have one of these monitors at home now, which still works! I got it running & it seems to be just a regular VGA monitor!
It was returned to me after a few years use in my friend's arcade machine, when he swapped it for an LCD monitor.
This takes me back, I used to work on amusement machines and video games, Wells Gardner and Hantarex were a common monitor to use
excellent work Mark, love the winding machine.
I love how you actually fix and rebuilt things Mark. A real technician's technician. 27:12 vertical hold - that brings back memories of trying to get good reception on the telly in the 60's and 70's
So satisfying to see old tech being brought back to life! Fantastic personality, to the point, and very informative presentation. Great editing too. Thank you so much, subscribed.
⁰
Astonishing skill level in so many areas! Is there anything you can't mend!! Really enjoying your channel and the high quality of your videos and your workmanship. Thank you very much for sharing them with us.
I'm getting addicted to your repair videos - good job, and thank you for sharing.
Hi Mark, I look at this footage with the greatest fun an appreciation. More than your skills its the humor and positive approach that makes your videos so entertaining. Being an engineer working in the automotive industries for more than 40 Years, this direct encounter of physical and electronics related problems is far away now in my job. So this kind of electronics adventures bring me back a little bit and I remember, why I choose this profession once in a while. Thank you so much for that, take care and don´t let the high voltages "bite" you
When you said they jet washed the set up, I never thought I'd see life out of it. WATER?? Awesome video.
I love these videos, amazing electrical / mechanical engineer and a suberb craftsman... really impressed with his patience and skills... there can't be many like him left with our disposable society. ⭐⭐⭐⭐⭐
You make "The repair shop" look like bodge it and scarper, top class work Mark
Your good humored joy at your work is a joy to watch. Thanks !
I have just discovered this channel. I used to work in the trade, back in the day. 20 years ago now. I consider myself very competent with electronics diagnosis and repair, but I have to admit I would not even have contemplated rewinding that transformer. However, watching you do it has taught me that it's possible. The winding machine is kind of important, though.
I was chuckling often at the very healthy respect that was shown for the line tranformer output, and even the self recharge capability of the tube. That is the kind of respect that can only be shown by someone who has worked on these long enough to get a jump off one. And I've been there, and I am frightened of the HT cap in _exactly_ the same way. 😂
This was an excellent repair.
The attitude and enthusiasm reminds me of a grade school teacher. That's a compliment I think lol. That positivity is contagious.
Never realised you can solder through the varnish. Always learning something from your excellent channel
amazing just amazing i never thought i would see a electrical repairer even attempt any thing like a re-wind well done to you every tome i see a new video of your i hope its the repair on my receiver
Hi Tony, coincidentally, I’m filming it right now! It will be the video no 21 I reckon. Not that I number them…
I really admire your KNOWLEDGE of electricity!! I wish i knew a fraction of what you know! TY from NYC!❤️
Defo the best channel on youtube for this sort of stuff. That transformer biz was real next level stuff.
Another great video mate 😃👍, the "helping hand resistor" access the b plus regulator is common in monitors, ive seen those regulators shorted a lot of times, a dead give away before you even open her up is the set will power up at lower voltage on the variac but cuts out as you increase the input voltage and the xray protection circuit triggers...
I’m subscribed to lots of fixing it channels like this but I’ve never seen anyone able to repair things to such a level as you do. I’m watching in complete disbelief.
Incredible….
Andrew
I haven't seen a TV repair since 1985. With the dot bar generator, too bad you didn't degos the the picture tube. It made the phosphates come alive with color and the fine tuning (or alignment) was finely tuned using the dot bar generator was for. Chroma-alignment, after all the years I'm watching this and I only did one in my entire life! In Jr. High school with a friend back then name Seth Isenberg I think? Anyway we were hanging around and watching a Zenith TV 25" color. I notice the chroma-alignment looked whacky so I offered to fix it. At that time period the TVs (25" color) had a minnie dot bar circuit card you could mount it on 2 screws so you could use them to blend the colors to a white line out of primary colors. I got caught and never did one ever! You really hit a nerve with this episode! Cheers!
I can tell you have been at it for a long time and have studied more than just electronic circuits. Rewinding a transformer is an art.
Never wound one. He has the kit, and knows how to use it. A star!
LOL, I haven't done a CRT in near 25 / 30 years! Great Video. The Transformer winding is epic!
Loved the anode discharge bit- I always did it the way Mark did, with a lead. I was accused of being soft by the other blokes in the workshop who just used to cross a couple of screwdrivers to short it!
Mark, as someone who has undertaken monitor repairs onsite, including in public spaces, I am in awe of the work you do. We used to swap out driver and scan boards and then repair the boards back in the workshop. I cannot believe now that I would take the back of a terminal, sometimes on the reception counter of University libraries - Defo less H&S rules around then! Fortunately for us we worked for the system manufacturer (Cifer) so was able to source all new parts so I have never had the joy of rewinding a transformer. I've dabled with LCD TV Repairs and retro electronics but hoping to do more once I move house and setup a better workshop. You and your setup are an inspiration sir...
It is the best place in the world to revive anything. It was amazing.👍
I’m so glad as a curious kid with no electrical knowledge that I never took apart an old tv.
Love the way you do these videos
It's such a pleasure watching you work. No doubt you love your craft.🎉
Transformer winding was brilliant to see! good to see those old tools used!
When your winding your own transformer you are most certainly down a rabbit hole, fantastic repair, well done!
Jeez I now need a winding machine, too? Great job Mark! Myself and RetroLabAthens will definetely stay tuned to your channel!
Never seen a transformer winding rig like that! That would be a game changer for repairing transformers.
Skill! I did a similar but crude repair to my brothers central heating boiler. The gas valve was open and the gas supplies shops- not plumbers- wouldn’t sell me one because I wasn’t CORGI. Registered. I’m a lift technician, or was in the early 70’s. So, I took the potted core out and dismantled it substituting the coil with a varley one, rewinding it onto the original former and re-potting it. With tar. Worked a treat! This of course was pre snowflake times and my little brother was training for his P1/2 exams. He’s now a multi millionaire and lives in France in an old Mill! So, study accounting and you can retire at 50!
I never thought you are able to bring this sucker back to live. You are a genius 👍
Your skills are amazing. And this old rewinding tool is a masterpiece 😊
This kind man never ceases to amaze. In addition to having a very well-equipped laboratory and workshop, it turns out that he is soldering the varnished copper cable and I say to myself: "Doesn't he remove the varnish? And as soon as I finish my thought, he says it! Greetings from Argentina. ps, translated text listen to Google. sorry
I worked on stuff like that for 40 years. The fast and simple way to start is to check the collector of the horiz output transistor for a short. If no short connect power to the monitor and check for B+ voltage at the collector of the horiz output. If ok the drive signal is likely missing. If no B+ go back to the power supply. That transformer you repaired is the horiz drive transformer .The horiz osc comes from IC 2 to the base of TR10. Another thing to be aware of when you work on monitors like that is they may require sync from a video signal to turn on the horiz osc. NO video signal connected the monitor may not come on.
As usual your patience is commendable.
Love the rewinding of the transformer. Real old school skills
The fibrous winding tape, may just have been what they had, or it could have been to cut down on the noise. In my youth I could hear a flyback transformer, which is up there north of 15KHz and CRTs annoyed me - the fibrous wrap tape may have helped to quiet that. And I have to give a shout out to my old friend the Keithley 236 SMU - a brilliant piece of equipment, used it for years in integrated circuit testing. Thanks for the video mark, brings back memories.
I'm 41 and can still hear a crt TV that's on. Hell in a quiet enough room I can hear plugged in phone chargers.
Rolls his own transformers, a legend.
The correct term is winds.
@mariemccann5895 It's not meant to be correct. It's like rolling your own cigarettes. Homemade. Making your own. Not store bought.
@@cjh0751 Detail matters.
@@mariemccann5895 Tell that to Dave Jones. He uses the term roll your own when referring to electronics.
@@cjh0751 That doesn't surprise me at all.
Thanks again, Mark. That transformer rewinding was brilliant.
What a repair, what a repair!!! Nice to watch such artist. Thank you. 👍
Not as much as rewinding the transformer, but undoing the thin wiring in a way that allowed you to figure out its turns count is remarkable. Great job !
Watching your videos I've realised why I'm not great at repairing equipment. There is no way I would have suspected that transformer. It's a couple of lengths of wire, what could possibly go wrong with that. I need to stop assuming things. Thanks for doing these videos, they make great watching and are very educational.
You are really great technician! Nice to see a transformer rewind to safe this one!
Btw, if the scan coils aren't connected it's not possible to get high voltage, but nothing wrong to cover the anode connector to be sure!
Watched many of your video over the last 2 week and I must say your attention to details is absolutely legendary. I like to get suck in and repair things like you but normally give up at the first hurdle. May be because I only got access to a multimeter these days. Keep up the great work.
wow love your work, rewinding electronics is a art in itself mark
Mark keep doing what u do as I imagine my many years in an electronics lab tweaking away. Good on u
I used to remove HT connection from the CRT with a loop of a nylon (kite) wire once round the connector , pull it tight it then should pop out of the CRT without damaging the conductive inner of the glass CRT connection (of course discharge the HT first like you did)
Mighty Mark! Amazing job, as usual ... Respect!!
Excelente reparación ingeniero Mark, estos TVs son muy BUENOS, vale la pena repararlos. 🙂🙂👏👏👏👍👍😃🙂
Just look at that coil winder! Oh man! Great job, as always!
You hate the anode cap about as much as me! Used to hate the things, probably from when discharging one with a massive pop when I was learning!! I've got to recap my old arcade machine monitor soon, can hardly wait!
In every other video, I am very impressed with your capabilities. You possess a deep wealth of knowledge and experience. Thank you for sharing.
probably the most wholesome electronics fixing channel, love watching this while working from home.
Top quality in every way. Well done.
The man's a genius with the patience of a Saint, love it!
Looking forward to this one. We had many of these, they were quite good. Eventually, we started replacing them with Wells Gardner monitors which were a lot more robust electronically.
Takes me right back that 😊. The crackle of the eht, keeping one hand in your pocket whilst getting the test leads in. Obviously, we always used an isolation transformer but it was still a bit scary. My old boss used a monitor chassis for re-flocking juke box turntables. The EHT lead "borrowed" from it's connection to the tube, he would wire it to a fine, steel sieve and sprinkle the flock onto a glue-wetted surface. The main piece of safety equipment was a thick rubber glove😂. Kids of today, they've no idea 😂
This is very amazing fix, because you replace ........rebuilt coil for the pilot transformer.................VERY COMPLIMENT FOR YOU THANK FOR YOU VIDEO
So that's how you wind a transformer. I was thinking you were going to weigh the copper to somehow calculate the length of wire to wind the thin turns. Amazing job! 😅
Above and beyond on this one. Rewinding a transformer is something seldom seen but credit to you. I personally keep right away from old CRT kit. It’s usually bulky, dirty and will try bite you 😂. Quite why you would pressure wash one is most bizarre. Nice job on this one though.
I laughed at the microsoft logo at the end. That was neat. I remember we had the RCA black and white in our home and it lasted us a good 15 years without any hiccups.
Really enjoyed every minute. Yep definitely a fondness for crt tv. The coil winding was so interesting, the machine looked Victorian in a nice way,
Back in the day I used to service Commodore products, I hated working on the CRT monitors with live (240V) heatsinks, this brings back memories.
Brilliant video, never saw a technician actually take apart and rewind a transformer. that winder was really cool. Great work! I subscribed to see more.
Bravo !!!!!! il y a longtemps que je n'ai pas vu la réparation d'un moniteur a tube cathodique, et en plus la panne, le plus difficile a trouver pour un technicien une self en panne (et je sais de quoi je parle !!!), et en plus cerise sur le gâteau "Cherry on the cake", refaire une self, tout un art, tu est vraiment un as !!!!!, franchement vous les anglais vous êtes très fort, dur a dire pour un Français 😄😄😄
wow.. so cool to rebuild the primary and secondaries of that transformer. I love the winding/unwinding machine too. Actually quite easy to build a transformer with the right tools.
athat transformer that you have rewound is the driver transformer for the horizontal output transistor and a very common fault in tube televisions both b/w and color.
I recapped one of these with nichicon FW series caps, I tell you what after doing it the picture was bright as hell and pin sharp, these are excellent monitors.
Excellent repair. Great work on winding the transformer.
If it's of interest, 35 years ago at the BBC I was taught to use an incandescent lightbulb to discharge/keep a tube discharged since it gave crude current regulation and a nice visual indication!
"Don't wash your telly, people." Brilliant. Gonna steal that. I fixed one recently with the exact same issue. Stole one from a Hantarex Polo.
Takes me back 25 years now, I was a TV/Video tech from 85-2000, discharging the tube, I'd pull the EHT cap off first, prising off with a screwdriver, then we used to use 2 large screwdrivers to the chassis, CRACK ! No fear back in the day.
Thanks mark your channel is a great watch ... i don't dabble with
stuff you do/mend .. but it's fun to watch you do it !
Your channel is awesome, definitly earned my subscription! And as others already mentioned, that winding machine is pure class. Big W seeing someone who has these tools.
Danger. Genious at work. Brilliant. You have so much knowledge you never fail to amaze me
Well that was fun! First time that I saw someone rewind a transformer, very impressive! And a lost art.
You are an excellent technicians And a Very Nice person
Excelent work with the tranformer, and I love the gear you used.
Subbed.
Awesome, inspiring. Why did I choose computer science and not electronic engineering I will never know (that was 23 years ago mind). I’m a teacher on my school holidays and I can’t help but think your interest started in your old technology classes. I’m binge watching your videos and I think I’m halfway through. Gonna take a little break because I don’t want to run out. You’re everything the BBCs The Repair Shop will never ever be! I’d go as far as to nominate you for a Nobel Prize.