STC Electrodynamic Speaker Field Coil Rewind - 1930s

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Steve asked me to help get his project radio working. It's an STC Console from 1938. I got the radio to work but the field coil in the speaker has shorted. I haven't rewound one before, "it can't be too hard" I told Steve.... "leave it with me". Can I do it?
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Опубликовано:

5 окт 2024

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Комментарии : 416

@enoz.j3506 9 месяцев назад

From an old timer, electronics engineer that was a great watch. Thank you Dave.

@DavidTipton101 9 месяцев назад

Thank you @enoz.j3506 👍🙂

@TheUltimateRecycler 9 месяцев назад

"It can't be too hard" is a statement that can get many of us to the depths of despair! Great work Dave, yet again! 👌👏

@DavidTipton101 9 месяцев назад

Thanks Chris. Famous last words 😄

@kimhenry5658 9 месяцев назад

And here’s a cheer from Tasmania.

@DavidTipton101 9 месяцев назад

Harrah... thanks Kim 👍😄

@Rene_Voortwist 9 месяцев назад

Wow Dave, I'm still amazed at the lenghts you go to restore vintage radio equipment. What a fantastic job you did here! I really enjoyed this, thanks!

@DavidTipton101 9 месяцев назад

Thank you Rene. I'm glad you enjoyed it 😊

@BrianTheRedLionGR 9 месяцев назад

Great videos as always Dave Merry Christmas 🎅 all the best Brian 🇬🇧👍🇦🇺🍻

@jake359nl 9 месяцев назад

Oops...he did it again..!! Thought it couldn'd be done but here's Dave..!! Wow! Such skills and determination. 👏👏

@DavidTipton101 9 месяцев назад

Haha... thanks Jake 😄

@Ockhamcool День назад

Love this video! So real. I went through many of these same discoveries when winding guitar pickups and other coils which also use very fine wire. I built a coil winder to do just what you're doing. Again, THANK YOU for showing the failures, not just the sucess. We learn so much more from seeing failures than from glib and glossy edits of reality.

@DavidTipton101 День назад

Thank you @Ockhamcool. It's steep learning curve 🙂

@peterkutas1176 9 месяцев назад

WOW, I felt your agony each time the wire broke!

@DavidTipton101 9 месяцев назад

You and me both Peter 😄

@iantyler4045 9 месяцев назад

Dave your skills never cease to amaze me. The description of how electrodynamic speakers work was very clear and understandable. I have restored a slightly newer STC model (536) which has the same setup but fortunately the electrodynamic coil was intact (but not the speaker transformer). A pleasure to watch your work as always.

@DavidTipton101 9 месяцев назад

Thank you Ian. Don from Don's Old Rado Shed is doing a 230 which is the same chassis I think. His is a very neat radio 🙂

@manFromPeterborough 6 месяцев назад

I got given a Rola version of this speaker at primary school Y6 of '83 by one of the kids, I took it home to plug into my 1w Audiosonic tape radio, I barely got sound with radio fullblast, I thought the voice coil was 2000 ohms, since that was stated on the speaker, What a feeling by Irene Cara was playing. the speaker had the tin cup cover and screen voice coil cover. I brought it back toschool telling the kids the speaker is too big for the taperecorder, they had a great time unravelling the field coil while wrecking the speaker

@DavidTipton101 6 месяцев назад

You had a lot of speakers to destroy there vaughn 😀

@manFromPeterborough 6 месяцев назад

My cousin Jim had a late 50's Hotpoint by AWA radio gram in his bedroom when he lived at his mum's back in the 80's, he told me about the gram at Joanne's wedding late 84, I asked many questions about it, he said the speaker is 4 ohms 4w. I imagined it might have a field coil Rola. I also imagined it would sound good with Durran Durran Wild Boys played full blast. When Jim's last CRT TV went, he had no room for the gram, a widescreen TV was coming in, he said I can have it and 2 dead CRT TV in 2010. I took the CDs and papers out of the record compartment when I collected it from verrandah while he not home, he rung up and said I told you to take everything out of it, demanding the records back, he wanted Rock around the Clock 78 and 2 Les Paul 78's back and Tom Jones Green Grass of Home album ( that song was used on his photo slides after his passing 2 yrs ago). A 6BV7 valve and MSP 12PW 6.5 ohm and 5" 3 ohm in Hotpoint radio gram. For some reason the record player sound extremely tinny, BSR with ACOs cartridge@@DavidTipton101

@CASHSEC 3 месяца назад

We are all learning from you Mr Tipton. The first time I heard about humbucking was learning some info on the Gibson sun burst Les Paul guitar. They have humbucking coils in them but I never knew what they did. At 74 I do now. Thank you😊

@DavidTipton101 3 месяца назад

Good, thanks for the feedback @CASHSEC 👍🙂

@grahamrdyer6322 9 месяцев назад

There is only one person in the world that would have done that and that is you, well done Dave.

@DavidTipton101 9 месяцев назад

Well... I think others could do it too 😄 Thanks Graham 👍

@Ragnar8504 7 месяцев назад

@@DavidTipton101 Maybe they could but I doubt anyone would actually do it!

@kenrolle2338 9 месяцев назад

Thank you Dave for the explanation of a hum bucking coil. I've heard the term many years ago but never knew how it worked.

@DavidTipton101 9 месяцев назад

My pleasure Ken. It seems we both learned something 🙂

@SBCBears 9 месяцев назад

I don't know what to say that hasn't already been said. Just, I'm awestruck.

@DavidTipton101 9 месяцев назад

Thanks @SBCBears 🙂

@BoB4jjjjs 9 месяцев назад

I learn something every day, that speaker coil is new to me. Well done, I don't think I would have taken that on!

@DavidTipton101 9 месяцев назад

Hi Bob, thank you. It's a daunting task, luckily it worked OK 🙂

@roberthart8933 9 месяцев назад

Hi Dave. I found myself holding my breath watching this. Winding 1.8km of fine wire and solving the breaking issue. Well done. I reckon refitting loudspeaker cones must be one of the most fiddle parts of radio repair. These speakers would have been expensive to make.

@DavidTipton101 9 месяцев назад

Hi Robert. It was difficult at this end too. I was waiting for it to break again. Very complex speakers, they would have added quite a bit to the radio cost. Thanks Robert 👍🙂

@DrFiero 9 месяцев назад

I can't imagine the patience of the guys ~100 years ago, needing to do the coil winding by hand & eye!! As for the new wire you got, it's probably a more brittle alloy, or they didn't anneal it enough so it was brittle. Success in the end though! Fantastic.

@DavidTipton101 9 месяцев назад

Thanks @DrFiero. I wish I had as source of better wire, that would go a long way to better results🙄

@stuartirwin3779 9 месяцев назад

Even a century ago, they had very good automatic coil winders, which operated at very high speed. All mechanical counters, of course, but programmable with selectable cams, gears etc.

@DrFiero 9 месяцев назад

@@stuartirwin3779 - Oh wow! Had no idea. Was picturing some guy with a machine like a sewing machine pumping a peddle, holding a spool of wire... and REALLY concentrating on his work. ;)

@retro_tech 9 месяцев назад

Great job (as usual) repairing this electromagnetic speaker. Another reason why the field coil is less thick could be because your winding machine winds the coil so neatly, which is not strictly necessary for a field coil. The original one was probably wound much more unevenly.

@DavidTipton101 9 месяцев назад

Thanks @retro_tech. The original coil was pretty well wound. It fell apart a bit when I dismantled it. 🙂

@hijmestoffels5171 9 месяцев назад

I didn’t read the caption of this video well enough and thought mr. Tipton had gone insane, rewinding the voice coil. But it was just the field coil. Piece of cake 😜!

@DavidTipton101 9 месяцев назад

I'm not that crazy... yet! 😄 thanks Hijme.

@SubTroppo 9 месяцев назад

A decade or more ago my next door neighbour here in Kenmore lent me his Dremel which of course immediately burnt-out. I offered to buy another. He declined, and of course being an old-school pre-Telstra man, he rewound the motor. Why did I not know that he is capable of such things!? ps He has just celebrated his 97th, ppsThumbs up!

@DavidTipton101 9 месяцев назад

Wow, that is impressive, good on your neighbor. Thanks Pablo 🙂

@batman387 9 месяцев назад

Great video. I learned a lot. Good to see you. Take care! 😀

@DavidTipton101 9 месяцев назад

Thanks Batman 🦇

@KevinCoop1 9 месяцев назад

I had to rewire a 1963 Sears electric guitar Hershey bar pickup. Nobody could rewind it for me since there were no holes in the bar. So, I used my Shopsmith and mounted the bar to a piece of wood that I turned smooth. I mounted have of a magnetic door switch to the back of the wood and fixed the other half so it would close by the magnetic. I wired the switch to the circuit board of an old desktop calculator at the + button. Those old calculators would work as 1+++++++++++=13. With the 42 awg wire, it was hard to do, because of instant start breaking the wire. Don’t remember how many thousand wraps it needed.

@DavidTipton101 9 месяцев назад

I had to look up Hershey bar pickup and Shopsmith 😄 There is a lot of fine wire in there. That's thinking outside the box using the calculator, well done 👍👏🙂

@alpcns 2 месяца назад

Well done David! Speakers are tricky things. I am sure the owner will be delighted with the results.

@DavidTipton101 2 месяца назад

Thanks alpcns. the owner was very pleased 🙂

@vicmabus1532 9 месяцев назад

Wow! Wouldn't have thought a repair like this would be possible! Tou saved another!

@DavidTipton101 9 месяцев назад

Thanks Vic 👍🙂

@vicmabus1532 9 месяцев назад

[You]

@ripleysmith7583 9 месяцев назад

Great job saving that speaker. Putting all the fun toy to use.

@DavidTipton101 9 месяцев назад

Hi Ripley. It always a good day when I can play with my toys 😄

@jerkerfridh8189 9 месяцев назад

Dear Sir, thank You for yet another year of entertaining and educational radiorestoring. Alongside Manuel, You are the one that I allways refer to when asked upon the subject of old electronics. All the best to the Tipton Family❤

@DavidTipton101 9 месяцев назад

Hello Jerker, thank you. All the best to you too Jerker, see you in 2024 👍😀

@Elektronenregen 5 месяцев назад

It felt bad to see the wire break and I was hoping, that it would not tear apart at like 3/4 of the length :). Very interesting with the humbucking coil! Cool to see, that they used methods like that back then. Thank you for the very interesting video!

@DavidTipton101 5 месяцев назад

Thanks Elektronenregen 🙂

@richardmelville5973 9 месяцев назад

Sir, you are an absolute wizard.

@DavidTipton101 9 месяцев назад

Thank you Richard 🙂

@fuzzwack1 9 месяцев назад

What a cool looking face on that radio!

@DavidTipton101 9 месяцев назад

We did have some nice dials. Thanks Robert 🙂

@misterhat5823 9 месяцев назад

First off, I'd never have that kind of patience. It's amazing that you rewound that many turns of fine wire. As for matching the number of turns vs. resistance: Perhaps you could use thicker wire and match the number of turns. The resistance would come out low and if was more than, say, 10% low add a series resistor.

@DavidTipton101 9 месяцев назад

Thanks Mr Hat. I did say thicker wire may have been a better choice 🤔

@johannesbakkedal1801 9 месяцев назад

Always enjoy watching you do speaker and transformer work

@DavidTipton101 9 месяцев назад

Thank you Johannes 🙂

@ninaevans4501 9 месяцев назад

Added comment to the last one. Fantastic (and informative) video once again Dave. At 52, we just wish we had your patience. Bonzer Mate. Wayne & Nina 👍👍👍👍👍👍🫡🫡🫡🫡🇦🇺🇦🇺🇦🇺

@DavidTipton101 9 месяцев назад

Thanks Wayne and Nina, I wish I was 52 🙄🤣

@Donno308 9 месяцев назад

Wow, nice job! I'm sure the owner will be happy. I've never seen a field coil rewound before and I'm sure you couldn't have done that with your old winding machine, even after you modified it! A bit strange, your wire having a different resistance per meter to the old stuff. Looks like matching the DC resistance was the right way to go. Trying to match the number of turns would probably end badly, especially with the length of wire required per turn increasing with the effective diameter. What a coincidence that we both released videos about 1930's STC radios at exactly the same time!

@DavidTipton101 9 месяцев назад

Hi Don. Thanks. I'm just watching your video now. I couldn't work out the resistance difference either. You would think it would be the same. I was originally going to match the turns but I couldn't get the old coil off in one piece and then I realised the resistance would be way out. The metre measuring wheel worked well to, a last minute purchase for China. I could believe it when your video popped up, people will think we are in cahoots 😄

@mackfisher4487 9 месяцев назад

You two are part of the Australian radio restoration Mafia, that seems to have a goal to raise the bar in the community.@@DavidTipton101

@Ragnar8504 7 месяцев назад

@@DavidTipton101 I'm not all that surprised about the difference TBH. Slightly different alloys seem to differ in resistance quite a bit. I've heard some complaints about large mains wires (50 mm2 and up) no longer fitting into crimp connectors because the manufacturer used higher grade copper so the diametre ended up being too small for the crimps.

@jimburns348 9 месяцев назад

Great job Dave. Never sweat the small stuff. 😉

@DavidTipton101 9 месяцев назад

Thanks Jim🙂

@aa1ww 7 месяцев назад

The other commenters have said it all but I just have to add my compliments and thanks. I have reconed or replaced surrounds on some expensive hifi speakers and fortunately the supplier provided a video and shims, etc. You're detailed treatment is reference quality work to which others will refer for some time. Also, I appreciate your intuition on the mechanical details as well as the electronic. It was so satisfying to learn about and see how you solved the voice coil alignment. God Bless you and yours, Coop ps: Don, @RestoreOldRadios, is an excellent restorer and very generous of his time and experiemce.

@DavidTipton101 7 месяцев назад

Thank you Jeff. It is uncharted waters for me but fun to work out how to do it. I will learn form what I did and be better next time hopefully. You I agree, Don wrote a comment and was very helpful 🙂

@ronisch 9 месяцев назад

It's very cool see one good man work.

@DavidTipton101 9 месяцев назад

Thank you Ronisch 😊

@mikecass8306 9 месяцев назад

Dynamic repair !! thanks Dave 😀

@DavidTipton101 9 месяцев назад

Thanks Mike 🙂

@rciancia 9 месяцев назад

Great job Dave.. The diameter of the coil is different because your winding method was more precise. WELL DONE !!

@DavidTipton101 9 месяцев назад

Hi Ron, thanks. That's a good way to look at it 😄

@rciancia 9 месяцев назад

@@DavidTipton101 we always turn lemons into lemonade !!! :) Great work as always

@falksweden 9 месяцев назад

That's a proper job, Dave! And a lot of us learned something new too! Happy new year to you and the family!

@DavidTipton101 9 месяцев назад

Thanks Kristian. Happy New year 👍🙂

@JE-hm7jw 9 месяцев назад

Good Show & Merry Christmas from the Texas Hills

@DavidTipton101 9 месяцев назад

Thank you JE and Merry Christmas to you 🎄😀

@robschertler8099 9 месяцев назад

Nice work, Dave. And thanks for including the animation for the field coil speaker. Well done.

@DavidTipton101 9 месяцев назад

Thanks Rob. My pleasure 😊

@craignehring 9 месяцев назад

Fantastic repair Dave get it done

@DavidTipton101 9 месяцев назад

Thank you Craig 👍🙂

@greggsvintageworkshop8974 9 месяцев назад

Awesome work on the speaker coil Dave! I LOVE your coil winder sir! Great parts you printed, the form for the field winding, as well as the centering tool, Great idea! Very nice job!

@DavidTipton101 9 месяцев назад

Hi Gregg, thanks. I will admit the coil winder is a thing of beauty, it's not perfect but a very nice unit. Our 3D printers are very handy, the transformer spools work well, I use ABS for those so they are good to over 100C 🙂

@DIlic-iz9tx 9 месяцев назад

_What you are doing is perfection._

@DavidTipton101 9 месяцев назад

Thank you Domenico 🙂

@electronicsoldandnew 9 месяцев назад

Really enjoyed that, thanks Dave. Really liked the graphics. 👍 👍 👍

@DavidTipton101 9 месяцев назад

Thanks Manuel. I knocked the graphics up in a few minutes 🙄😄

@jonka1 9 месяцев назад

Nicely done David. I wound one recently where the DC resistance was part of the screen voltage circuit for the whole radio and needed to be exact. That involved some trial and a few errors to arrive at the right amount of wire on the coil. Good to see you here.

@DavidTipton101 9 месяцев назад

Hi Jonka, thanks. OK, interesting. I think I concentrated too much on the DC resistance and neglected the inductance 🤔🙂

@billnicholson2470 9 месяцев назад

A very good learning experience for you and us. Alot of thinking and patience. Thanks David. 73 de KB7ICI.....Bill

@DavidTipton101 9 месяцев назад

Thank you Bill 👍🙂

@stuartirwin3779 9 месяцев назад

Hi Dave. The difference in measured coil resistance on the original coil from the specified resistance can easily be accounted for by temperature. I believe the resistance was specified at 20 deg, and only about 5 degrees above that can add 50 ohms. It's worth considering that, when measuring copper wire. ☺

@DavidTipton101 9 месяцев назад

Hi Stuart, I understand what you were saying the other day now. I had the AC on in my room so it should have been about 23C. That's a good point, I will remember that for next time. Thanks Stuart 👍😊

@cbiz8 9 месяцев назад

How patient! Thanks David!

@DavidTipton101 9 месяцев назад

Thanks Carlos 🙂

@kfl611 9 месяцев назад

Great job, thank you for sharing with us ! I'm glad you helped rescue and preserve a nice old radio. I love the dial, looks so neat ! I feel like I've stepped back in time, looking at that dial.

@DavidTipton101 9 месяцев назад

Thanks you kfl611. It is a very nice looking dial 🙂

@Stephens8x6Workshop 9 месяцев назад

Brilliant Dave, never tire of watching your video's. Just watched Dons radio channel and ripped him off a strip for publishing a video on what should have been my last afternoon in the workshop before my Christmas break only to find a notification for you too! Well I just had to watch you both so looks like I'll be working late ha ha. All the best to you and yours for the season mate. Your ingenuity never ceases to amaze me.

@DavidTipton101 9 месяцев назад

Hi Stephen. Thank you, sorry to keep you up 😄 I shall have a word to Don about our conflicting video release dates. I checked his video metadata, he released his three minutes after mine so I have the moral high ground 😅 Thanks Stephen, Merry Christmas and all the best for 2024 🙂

@dianeramakers3368 9 месяцев назад

Goodmorning from the Netherlands Dave. Really cool, rewinding a speaker coil.

@DavidTipton101 9 месяцев назад

Thank you Diane 👍😀

@raymondmenard5444 9 месяцев назад

Hi Dave, you say you learned a lot on this one, oh boy imagine me ! It was fascinating seeing you make the calculations and i was on the edge of my seat watching the wire getting wound on the bobin after the 1st break. But i felt so relieved when the winding was finally done. Speaker sounds amazing now. Bravo ! well done once again, another one saved :-)

@DavidTipton101 9 месяцев назад

Hi Raymond. I did need to do some research on this one, what to look out for, winding directions etc. I knew how a humbucker worked but I needed the finer points. I hope we all learned something from this exercise. I was pretty relieved when the winding was finished too 😅 Thanks Raymond.

@seankearney2592 9 месяцев назад

Bah Humbucker....Happy Christmas To You and all the Family, Have a Lovely Safe Christmas....

@DavidTipton101 9 месяцев назад

Good one Sean 😄 Thank you and Merry Christmas and New Year to you 🎄🎅🎇

@stephencopeland238 9 месяцев назад

It's like watching magic in front of me..... Absolutely amazing........ Pure genius!!!

@DavidTipton101 9 месяцев назад

Thank you Stephen 🙂

@nixxonnor 9 месяцев назад

Wow - spooling 1,8 km wire inside that shape looks hard. I can't wait to se how you do it...

@DavidTipton101 9 месяцев назад

I did it! 😀

@stephenmalone1673 9 месяцев назад

Well done, Dave. You always leave me with a smile. Its rainy and cold here in North Florida. Merry Christmas.

@DavidTipton101 9 месяцев назад

Thank you Stephen. Really, I can't imagine it being cold in Florida, I assume you mean it has plunged to the low 70s 😉 Merry Christmas.

@sgath92 9 месяцев назад

Coils and rewinding them have always intimidated me. Speakers doubly so because of how fragile everything is. Luckily the one you worked on looks pretty service friendly, even the plug unscrews for replacing wires! I always seem to luck into speaker problems where the field coil housing is welded onto the speaker or some other weird complication. Now if only people would go back to manufacturing more generic speaker cones (preshaped) without the foam surrounds.

@DavidTipton101 9 месяцев назад

Hello @sgath92. The early speakers can be dismantled and you can get cones with the normal suspension if you look hard enough. Getting one with a small enough centre hole is the problem 🙂

@manFromPeterborough 6 месяцев назад

1" coils are still used on modern speakers up to 10"@@DavidTipton101

@paulperano9236 9 месяцев назад

Been a while Dave. Hope the missus doesn't have too long a list of chores for you over the Xmas hols.

@DavidTipton101 9 месяцев назад

Yes, I had a bit of down time Paul. My list of chores is always too long 😄

@clasicradiolover 9 месяцев назад

There you are. Hey, Mate. Another fine video, and I keep learning from you. I hope you are having a fine summer there down under.

@DavidTipton101 9 месяцев назад

Thank you @clasicradiolover. It's hot and a bit of rain at the moment, I hope it's good weather at your place 🙂

@clasicradiolover 9 месяцев назад

@DavidTipton101 I live in an area that gets down to 27° F then jumps back up to 70°F a few days or weeks later. It was below freezing last night and got warm enough for ac around 1:00.

@nathkrupa3463 9 месяцев назад

Great work sir.😊 Sir you installation a new speaker coil you must adjust the coil on magnet shaft otherwise speaker not properly work. Thanks thanks sir 😊❤❤

@DavidTipton101 9 месяцев назад

Thanks Nath 👍🙂

@Peter-yt7xm 9 месяцев назад

Thanks David. I use 600 ml coke bottle for shims on my speakers. The part of the bottle where the label goes around give you about 40 mm in length and they have a nice curve in them. As for the rest of the repair, just wow. You truly are a master craftsman.

@DavidTipton101 9 месяцев назад

Hi Peter, thanks. Good idea with the curved coke bottle, I will have a look 👍🙂

@Antony_Jenner 9 месяцев назад

Thank you YT for not showing me this a week ago. Thanks for a great video Dave, Merry Christmass to you and your family.

@DavidTipton101 9 месяцев назад

Hi Antony, make sure you have clicked the bell on the notifications icon on my channel. Thanks Antony, Merry Christmas to you and yours 🎄🙂

@HDXFH 9 месяцев назад

Well done there

@DavidTipton101 9 месяцев назад

Thank you HDXFH 🙂

@dogribmoon 9 месяцев назад

I have been waiting for your latest adventure. You never shy away from a challenge.

@DavidTipton101 9 месяцев назад

Thanks dogribmoon. I'm not smart enough to know better 😉😄

@maartenschapendonk6345 9 месяцев назад

Great job once more. Love the bit of ItaloDisco you put under the video

@DavidTipton101 9 месяцев назад

Thanks Maarten. A bit of 70s disco never goes astray 😊

@Plons0Nard 9 месяцев назад

Nice job Dave ! Not only the coilwinder was a good investment (thanks love ❤), also the 3d printer prooved to be a usefull tool. Inductance measurement would be the way to go but with a short in the original that is a no-go 🤓 That all said : well done 👍🏻🤝🏻🇳🇱

@Plons0Nard 9 месяцев назад

And a lasercutter. You ! Spoiled kid 😂

@DavidTipton101 9 месяцев назад

Thank you Nard. You gotta love the coil winder. I did wonder how to make the centring tool last time, wood turning, shims? I almost forgot about the 3D printer, very useful. Yes, inductance would have been good but with no real reference I couldn't use it. I have a lot to think about for next time 🙂

@juliangerardcascio1111 9 месяцев назад

😊 Good Job Dave Tipton 👏 👍 +1 !!

@DavidTipton101 9 месяцев назад

Thank you Julian 🙂

@johnpettiford4861 9 месяцев назад

Very impressive!

@DavidTipton101 9 месяцев назад

Thank you John 🙂

@paulrosen234 9 месяцев назад

Well done!

@DavidTipton101 9 месяцев назад

Thank you Paul 🙂

@Theoobovril 9 месяцев назад

Great work again, David...

@DavidTipton101 9 месяцев назад

Thanks Theo 👍😀

@magcoco 9 месяцев назад

Amazing work David. I always wanted to understand how those speakers work. 😊

@DavidTipton101 9 месяцев назад

Hello Khaled, thank you. Pretty simple when you lay it out 🙂

@johnrichardson7354 9 месяцев назад

Dave, You make this old Tandy Radio Shack Engineer happy watching you. Great Job.

@DavidTipton101 9 месяцев назад

Thank you John 😊

@neilforbes416 9 месяцев назад

3:34 - Humbuck! "Here's a dance you should know! Baby when the lights are down low!...... Oh, sorry, that's "Hucklebuck"! LOL😁

@DavidTipton101 9 месяцев назад

😀

@Mediawatcher2023 9 месяцев назад

@neilforbes416 Careful or you be finding yourself running all the way home that's the B side of the Brendan Bowyers version which was a double A sided hit.

@neilforbes416 9 месяцев назад

@@Mediawatcher2023 ~ groan ~

@Mediawatcher2023 9 месяцев назад

@@neilforbes416 The A side got all the airplay of course.

@__Dude_ 9 месяцев назад

Must have been an expensive unit in the 30th. About the job? What can I say that's not already said in the comments? You are the radio restauration master!

@DavidTipton101 9 месяцев назад

The radio would have been close to top of the range back then. Thanks Dude 👍🙂

@cbiz8 9 месяцев назад

David: Excellent Video! Thanks!

@DavidTipton101 9 месяцев назад

Thank you Carlos 👍😊

@mikehalsall8026 9 месяцев назад

Thanks

@DavidTipton101 9 месяцев назад

Thank YOU Mike 😀

@techobaz55 9 месяцев назад

Top job Dave, so interesting about these types of speakers. Thank You ! Cheers, Baz

@DavidTipton101 9 месяцев назад

Thanks Bas 😊

@SuperFredAZ 9 месяцев назад

Whenever I encountered this type of speaker, I replaced it with a choke and permanent magnet speaker, too much effort! You're a better man than I. Just by the way the actual resistance isn't as important as the number of turns, which determines the inductance, but I am not sure how you could determine the original inductance, maybe measure the inductance and then take 1.6/2.5 which would be 1.5 X, so if you measure 10 mhy, shoot for 15 mhy. In any event, it shouldn't make an enormous difference, maybe a bit more ripple, you can always take care of that with bigger electrolytics.

@DavidTipton101 9 месяцев назад

Hello Fred. Did you ever see the movie with Fred MacMurray where he practises a perfect murder and it goes smoothly. Then when he carries out the actual crime it all goes wrong? That was me. I figured the new wire would have the same properties as the old wire. I didn't want to go too far over the DC resistance but the turns were obviously less. In retrospect I should have matched the turns more closely as the impedance is very important and probably more so than DC resistance. I will learn from this. The B+ was spot on and the speaker worked perfectly as far as the ear can detect. It was good learning experience. Thanks for your input Fred 👍🙂

@SuperFredAZ 9 месяцев назад

@@DavidTipton101 Hi Dave, I don't remember the movie, but I get the point. Anyway, keep up the good work. I envy you your workshop!

@f.k.burnham8491 9 месяцев назад

I had to recone several speakers over the decades. I never had to rewind a field coil though. The hardest part is getting the voice coil centered. I was able to order kits that came with the alignment shims and special glue for the cone to frame. Great job!

@DavidTipton101 9 месяцев назад

Getting the voice coil centred can be tricky, there is not a lot of tolerance there. We don't have access to recone kits as such here, at least not at a reasonable price. We can get speaker components from China but they seldom fit these old speakers. Thanks FK 🙂

@richardbrobeck2384 9 месяцев назад

Nice job David !

@DavidTipton101 9 месяцев назад

Thank you Richard👍🙂

@domtrimboli6238 9 месяцев назад

Hi David, awesome work, you are a genius, keep up the excellent work. Cheers.

@DavidTipton101 9 месяцев назад

Thank you Dom 👍🙂

@BobAndersson 9 месяцев назад

Merry Christmas to you and yours Dave. Thanks for the entertainment and instruction. I hope 2024 is a happy and, above all, a healthy one for you. 🥂

@DavidTipton101 9 месяцев назад

Thank you Bob. Merry Christmas and I hope a very happy and healthy 2024 👍🙂

@glasslinger 9 месяцев назад

Nice winding machine. I'm surprised there is no soft start or wire tensioner. A tip (from an old radio restorer) is the actual resistance of the coil is not important at all. I hand feed the wire and pile it on until the form is full, not paying any attention at all to the resistance. It's amp-turns that count, and even that is very lax in requirements. The overall resistance should be lower if anything so you don't drop your B+ to the circuit too much. After you do a few dozen coil rewinds you will figure ways to cut the time and labor. You did a very nice job on it but you will not make a profit if you keep that level of labor. I had to do at least one radio per day when I was in business, and two a day was normal.

@DavidTipton101 9 месяцев назад

Hi glasslinger, thank you for dropping in. The machine has a slow start, it was set to the lowest value but a real soft start would be better. I was at a loss as how to approach this. I had originally thought the wire resistance would be the same as the old wire, it wasn't. I couldn't wind it until it was the same size as the original or the DC resistance would be close to double and would drop the B+ too much. In future I will better understand this and make allowances before I wind the coil and maybe match the wire resistance rather than the diameter. If I worked in a repair shop the business would go under in a few days 😄 Thanks glasslinger.

@chrismielke219 9 месяцев назад

Excellent video Dave!!!!!

@DavidTipton101 9 месяцев назад

Thank you Chris 👍

@richb419 9 месяцев назад

Hi Dave, impressive work!! Rich

@DavidTipton101 9 месяцев назад

Thank you Rich 🙂

@eddyaudio 9 месяцев назад

David a excellent refurbishment of old STC Electro Dynamic Speaker I admire the Winding Machine, In days gone by we used recycled speaker field coil with 240 Volt AC they made excellent demagnetised for tools around the workshop that come Magnetised,All the best for Christmas to you and yours,Ian.

@DavidTipton101 9 месяцев назад

Thank you Ian. Field coils as demagnetising tools, nice 😀 Merry Christmas 🎄🙂

@manFromPeterborough 6 месяцев назад

240V on field coil while playing audio would be hum city@@DavidTipton101

@charlieb.4273 9 месяцев назад

Another great video, thanks Dave.

@DavidTipton101 9 месяцев назад

Thanks Charlie 😊

@Peugeot306 9 месяцев назад

Good morning from the Netherlands David.

@DavidTipton101 9 месяцев назад

Good morning Paul 🌅🙂

@SeekingTheLoveThatGodMeans7648 9 месяцев назад

Thank you for the review. The proof of the pudding is not in the theory but the tasting, and you got a good volume with nary a hum. If one was to actually try to match something between old and new field coils that have close to the same resistance, I'd think it probably should be the number of turns, assuming the new coil will fit. I recall I have seen a field coil arrangement in a newer radio (its tube complement included a Loctal tube, which is how I know it was newer) that had no individual hum bucker, and there were only four pins in the connection, but instead the polarity of the field coil with respect to the primary and secondary of the audio output transformer was arranged to help cancel out the hum.

@DavidTipton101 9 месяцев назад

Thanks Seeking. I will review how I attach this next time. This one worked well but I think I could determine the windes better next time 🙂

@jamied2108 9 месяцев назад

Speaker field coil repair is a task I have not yet to endure. Great vid gives us a preview and a roadmap on how to repair these type of devices

@DavidTipton101 9 месяцев назад

Good luck if you attempt one Jamie, it wasn't hard once I figured a few bugs out 🙂

@Spiderelectron 9 месяцев назад

Thanks!

@DavidTipton101 9 месяцев назад

Thank you very much for your support SpiderElectron 😊

@haraldlonn898 9 месяцев назад

Thanks for a great video. I learned a lot from it.

@DavidTipton101 9 месяцев назад

My pleasure Harald, thank you 🙂

@stephenbarlin2314 9 месяцев назад

Excellent

@DavidTipton101 9 месяцев назад

Thank you Stephen 😀

@haythamchannel3553 9 месяцев назад

Hi David. Great work

@DavidTipton101 9 месяцев назад

Thank you Haytham channel 👍🙂

@georgeallen556 9 месяцев назад

Your A Star David

@DavidTipton101 9 месяцев назад

Haha... thanks George 🙂

@RobertSchmitt-u7l 9 месяцев назад

You can treat old speaker suspension components with diesel, to molecularly lube up the fibers and increase output sensitivity, lower distortion, and lower responce. It works great. Has not messed up any of the glues or surrounds or spiders I have tried it with. Helps it every time. It can also be used as a paper conditioner for very old dried out cones that sound a bit harsh, this happens when they get hard with time, llike old masking tape. Dilute the diesel to a 20 percent solution to isopropyl and spray on in intervals, to absorb and then dry, until it sounds good. The suspension components seem to do best, the more lube they get. It really helps both the surround and spider and it doesnt hurt how the cones are supported either. It makes the fibers looser which helps everything about the speakers properties. Great work with the field coil speaker there, It would be advantageous to use silver coated copper wire, It helps with all of those magnetic properties as well. If you can find it reasonable. I know there are warehouses full of new old stock things like that. Maybe find old factories and ask? anyways, great work.

@DavidTipton101 9 месяцев назад

I haven't heard of anyone using diesel on speakers but I am open to new ideas. Unfortunately, we don't have any old factories around here for me to ask about old stock, I'll stick to what the manufactures' used, that's hard enough to get as it is. Thanks user 👍🙂

@RobertSchmitt-u7l 9 месяцев назад

Cool, the diesel does work, Its improved 3 sets of speakers Ive used and they all improved. Also, if youre into really nice affordable full range, china is making an excellent one, the diatone p810 clone, these ones really woke up with the diesel traeatment (they have very light leather surrounds) they turn amber and just sound perfect. @@DavidTipton101

@lenhunter2719 9 месяцев назад

Thoroughly enjoyed that as always David, Merry Christmas And a wonderful new year to you and yours from me and mine here in darkest SouthAfrica. RWC winners 2023, still bloody dark without electricity though.

@DavidTipton101 9 месяцев назад

Thank you Len. Congratulations winning the RWC but we prefer not to mention it here 😳 Your power problems have been going on for years, it appears it is improving from what I've read, let's hope so. Merry Christmas Len and all the best for 24 🎄🙂

@ChrisSwenson 9 месяцев назад

I wish that I had a mind like yours David, that can wrap around the complexities of these schematics and various components. My dad was an engineer and foreman of the Model shop for Remington Rand Univac from the late 50's til retiring in 1985. I guess I inherited more from my mom's artistic temperament. Fantastic Job! (Not surprised). Merry Christmas & Happy New Year! - Chris

@DavidTipton101 9 месяцев назад

Hello Chris, we all have our strengths, I wish I had a artistic strength but I have none and I fail miserably as an academic. Thank you Chris, Merry Christmas and all the best for 2024 🙂

@jeffreyhickman3871 9 месяцев назад

Sorry 😞 I missed your video. That’s a very inviting Christmas 🎅 tune. I can already tell that you’re working on a field coil speaker 🔊. The field coil must have burned 🔥 open. There’s also humbuckers on electric ⚡️ guitars 🎸, if ya knew. Inside of one ☝️ is a permanent magnet 🧲. I’m working if this radio 📻 works on the same principle. Merry Christmas 🎄🎁 🎅 🤶 and a very Happy 😊 and safe New Year. Your friend, Jeff.

@DavidTipton101 9 месяцев назад

Hi Jeff. The field coil had shorted out and required a rewind. The humbucker in a guitar uses the same principle. Merry Christmas Jeff and all the best for 2024 🙂

@zx8401ztv 9 месяцев назад

Well that works spot on 😀 Not too critical. Unlike winding R.F transformers, i would run away from the stray inductance and capacitance between turns. I really would run away lol :-D

@DavidTipton101 9 месяцев назад

Haha... thanks @zx8401ztv 😄