1942 Ducati Radiogram - Part 2 - Speaker Repair & Bluetooth Installation

[@chriscollins9073]

I am going to say it one of the best electronics engineers in England nothing beats him and he can do and make ANYTHING I really enjoy watching these video's a real pleasure to watch him work. Cheers Mark.

[@darylhudson777]

My Dad was a WWII US Army Veteran... I am only 62 it's just hard for me to imagine that my parents danced to music like this even though I knew they would have with my Dad in a fedora and a suit, tie, cufflinks, Florscheim shoes and Mom in a nice dress , high heels with that 40's hairdo, a string of pearls necklace celebrating the end of the war. Thanks dear Mark as I miss them and you brought back fond memories.

[@eekamoose]

How brilliant that Ducati put their schematic diagrams online in 1942, they were really ahead of the game. 😂 It's fascinating seeing a device that is over 80 years old get some skilled attention from Mark. The speaker restoration was an awesome job, that cone will hopefully last another 80 years. This is some of the best video on KZbin, Mark!

[@Camerasdontlie]

I’m sitting watching this video and I can’t help think of the people at that time during the war. Probably all passed away now

[@tunderbird123]

I,m addicted to your repair videos...

[@eekamoose]

You're not the only one... 🤪

[@pearsedunne9938]

This video is so far out of this world. As a vintage valve tech, it’s one of the best I’ve ever seen. Great job, Mark……👍

[@retroaria]

My favorite channel, the best discovery in 2022. I'm just recording a video to share my favorites subscriptions.... this one make the difference. Thanks from Seoul, Tito

[@heinstein26]

Just Discovered this in 2023. I'm hooked. 🤩 Love from Melbourne, AU.

[@SitiSarah-f9w]

🙏halo omm betulin tif Soni yg kaset 2 dan firingan tiga , Omm 👍👍👍🙏🙏🙏

[@elsaarmstrong-zp6ng]

Speaker should have a gauze dome covering the centre to stop dire/grit getting into the magnet centre pole and voice coil ! Fraser!

[@shawnhuk]

Also discovered in 2023 from Southern Ontario, Canada!

[@BruceFord-kx9sl]

Awesome work, and thank you for letting the song play out at the end. What a treat. Cheers

[@q_clips6765]

Khruangbin on Austin City Limits "White Gloves"

[@youseetime]

Mark you're definitely a solder soldier. Amazing work keep it up!

[@jamesmeader6539]

Amazing work! Thanks especially for respecting the original circuitry and repairing it with appropriate techniques. A lot of "restorers" would have just gutted it all out and installed modern components. Oh, and I really like your Bluetooth board. Well done!

[@MickHealey]

Brilliant work as always Mark. This unit is the perfect demonstration of how technology has advanced in 82 years. Amazing.

[@kawmic7]

Except digital has made it go backwards again!🤣🤣😎😎

[@undercoveragent9889]

Seeing that 'DECCA' logo turning at 78 rpm brings back so many memories. Thank you.

[@GeneralPoison]

Nice to see the Swedish village "Hörby" being spelled in swedish on the facia of the radio dial.. While Stockholm was spelled in Italian... The Hörby transmitter was actually in use up to 2010!

[@TexTom1981]

With the size of the tonearm in that console, I'd expect shavings to come off the records! Wonderful restore.

[@nichouslip2394]

I recall from my early years working on similar radios, the magnet coil on the speaker was often used as the inductor with an electrolytic cap in a filter, hence the Output TX being mounted beside it as one end of primary would be at HT+. When re-centring cones I always used 3 thin strips of card or paper inserted radially in the airgap to hold the cone central while tightening the hold down screws. Keep up the good work, enjoyable videos.

[@New-tu3mn]

Mark, thanks, for including the entire playback of that 78rpm song. It was like a time-machine.

[@Horus9339]

No words can express the respect I have for you Mark. Thank you Sir for sharing your time with us.

[@TimHollingworth]

What a joy to participate. It was like I was there with you, watching over shoulder. I really enjoyed the delicate speaker restoration, with all its ASMR sounds. Even the components sliding into the board during the bluetooth assembly, as I listen on headphones. I was wondering how close your microphone was to pick up each nuance. Fantastic...

[@BPantherPink]

That look in the intro after he gets a shock...PRICELESS !! Mark Maher...you are the sweetest person, with the warmest smile and personality, i've ever seen !! A true Labour of Love...this restoration...truly immaculate !!

[@WendyandGeoffPattison]

Ducati still using the same design cues today, everything rounded on that beautiful old piece. Well done Mark, great resto. I think most techs would've thrown that speaker in the bin and installed a new one.

[@hamsandwich780]

genuinely surprised to see that Mark doesn't just have someone else assemble the PCB he designed, but I can tell he just enjoys putting it together

[@ironhorse6688]

This guy is a electronics genius

[@zetacrucis681]

Perfect for those 78s. Stellar job as always!

[@precbass]

Beautiful workmanship Mark, especially the bluetooth board. Such attention to detail and neatness. You certainly know your stuff.

[@neilmansfield8329]

This is a good record player

[@laurenceharvey6202]

Absolutely superb as always, has to be one of my favourite past times watching Mark fix stuff 😊

[@ThomasWinders]

Excellent work Mark. 11:06 - TIP: I see they usually put some paper strips between the coil and the magnet, to space them equally when assembling the membrane. The strips are removed once the cone is assembled.

[@lmamakos]

I'd not seen "gimmick" capacitors like the ones originally installed, and the ones that you constructed. Previously, I'd only known of the two wires twisted together (though not using CAT5 twisted pair wire, a bit too modern that is!) What an amazing restoration, and a great reminder of how simple an AM receiver can be.

[@skip1835]

The whole deal from pt 1 through pt 2 was so excellent to watch - - I especially like the 78 record player - - they sure knew how to build great stuff back then.

[@ole-kristianfossmann7682]

We learned to use rizzla sigarett paper for fixing membranes. Love your vids

[@michaelfoster3959]

Great to see some one that does not do a bad job but takes a pride in repairing and building a great old radio gram, I own a lot of thanks to a radio/television engineer that show me back in the 60s not to just throw radios away just because the parts was not available any more, this for a young boy just left school at 15years old, and start to work in a shop that repaired radio/television/ electric irons/hair dryers/etc, we all so sold the full range of resistors / capacitors/valves in stock for the public to cum in to buy. happy days, thanks for showing you great skills.

[@sinisatrlin840]

Ducati still makes capacitors, industrial and automotive electronics, generators.... high quality stuff. Ducati motorcycles are now part of Audi, and capacitors/electronics/electric is called Ducati Energia. We used their products on some ocasions, and they are not cheap, but so far zero complains.

[@stuartlee8041]

Love your channel, brings back memories for me, from the 70's and 80's when I was bench engineer for Philips, working on all of their varied audio products, after 1982 mainly CD players, the faults were of great interest to the design departments, and new faults were always a great source of excitement to me, especially on the Philips CD104, which were made in their thousands, also Maranz products were mainly Philips technology at that time, happy days, before products became less serviceable, and we were all dispensed with....hey ho

[@sPi711]

Man! Having to pull back the tone arm before playback in order to engage it; that brings back memories.

[@heima1299]

A little tip, the brushes for interdental spaces are well suited for cleaning the plug contacts of the tubes.

[@markstuckey6225]

Thanks for the tip. Another tip: thinned (with MEK) Ados F2 with black tempera and delaminated toilet paper for a very strong and almost invisible repair of speaker cones.

[@kenheitmueller69]

@@markstuckey6225 I've used newspaper and 3M general trim adhesive to good results as well. messy/sticky going on, though.

[@sharonlee4773]

Great tip!

[@bejay69]

Would love to have seen the owners reaction and seen it being used in situ. What a great channel you have Mark, subbed!!

[@RaymondMDay]

Nice job on that speaker reconditioning and bluetooth integration!

[@deansayers7435]

I love how you made that cap mark...nice work. A tip I've used for repairing splits in cones,is watered down pva and multiple layers of the the thinnest toilet roll you can find. Just use one ply. It's a bit like fibreglassing when you're doing it. I've had the best results using one ply ,laying it on and letting it sink in. Then leave to dry for a day or two. Then come at it again 45° to it with another ply. Then again. I've done some tricky repairs around the edge like yours this way that are in guitar cabs and still going strong years after And congratulations in all your recent support about the copyright take down mark. We're all with you mate

[@peterlarkin762]

Not only a skilled tech and thoughtful restorer, but a fan of Khruangbin!! Pure class.

[@HansDelbruck53]

A fan of what?

[@TimHollingworth]

​@@HansDelbruck53 My thoughts entirely, 🤔 so I looked it up... Khruangbin (/ˈkrʌŋbɪn/ KRUNG-bin; Thai: เครื่องบิน, lit. 'airplane', krʉ̂ʉang-bin, [kʰrɯa̯ŋ˥˩.bin]) is a musical trio from Houston, Texas. The band consists of Laura Lee Ochoa (bass guitar and vocals), Mark Speer (guitar and vocals), and DJ Johnson (drums, keyboards, and vocals).[2][3] The trio is known for blending music influences from across the globe, such as classic soul, dub, rock and psychedelia.[4][5] ~ Wikipedia The internet is a wonderful thing! 😁

[@JohnWaldron-cm7ce]

Didn't realize that Ducati made radios, besides motorcycles. Beautiful work! John in Texas

[@VadoVoodoo]

The gramophone is a work of art. Thank you for demonstrating it all to us, a joy to watch!

[@hadibq]

I just can't miss any piece of Marks Videos! So inspiring ❤

[@wagsman9999]

So awesome to see these old radios come to life.

[@LtdBoomer]

Cigarette paper and wood glue are very suitable for loudspeakers.Watercolor is good for refreshing cardboard membranes. Nice work as always Sir!

[@briangoldberg4439]

I'm glad that worked for you. I usually center speaker voice coils by putting something in the gap to shim it all the way around; an old plastic soda bottle usually works pretty good and is about the right thickness.

[@bones007able]

I gotta say whoever owned that radio , took great care of it , looks like the day it was purchased

[@JimAlfredson]

I had a Yamaha DXR10 powered speaker that I was using for bass augmentation with my Leslie for live gigs. The cone ripped from the edge almost to the center. I had another gig and didn’t have time to order a new speaker so I used some standard lined notebook paper and PVC glue (the white glue that Mark is using in this video) and repaired the tear. It was meant to be a temporary fix until I ordered a new driver but it lasted for five years! Eventually another tear opened up but my original fix was still fine. I did finally order a new woofer for it.

[@billdoodson4232]

Sorry to be pedantic, but was that PVA glue?

[@JimAlfredson]

@@billdoodson4232 no, it's PVC-E glue. I bought a big jar of it to do glue new keytops on piano keys.

[@billdoodson4232]

@JimAlfredson Ohhh, never come across that one before. I will investigate further. Cheers.

[@moottori_paa]

Saving that old beautiful speaker, I really love that!

[@padgepadgham3238]

New to me, but a great channel to have found 👍

[@rastaman5105]

Nice speaker restore Mark !!

[@chrissometimes7473]

I notice that - sin of sins - you didn't ground the plywood base of your Bluetooth module. 😀 Excellent work and a very interesting project.

[@garethroberts8549]

I bought myself a cheap SMD oven and modded it myself as per others instructions to make it perform way better. Makes smd boards way easier now, solder paste, place and oven together

[@S735334]

Dunno how I stumbled across this channel, but i'm glad I did... your knowledge & workmanship are way over my head..but I find the videos fascinating.. I have a very basic knowledge of audio electronics..i'm a bass player & hi-fi enthusiast... Keep these videos coming... Oh.. by the way.. my Ducati is definitely louder than your Ducati !!

[@simonnoble2345]

i have repaired speaker cones with newspaper and pva in two or three layers like papier mache. Paper or card shim coiled around the magnet to center the coil during install, pull it out before fitting a dust cap

[@followthetrawler]

Great mech eng skills - restoration of an 80 yr old speaker is not for the faint hearted! Thought it would be more bassy given its size, but sounded great.

[@elsaarmstrong-zp6ng]

There should be a dome over the centre to prevent dirt getting into the magnetic gap and causing scratching noise!

[@chrismulnix1749]

Amazing radio. I've never heard of it before.

[@silviumaxim142]

Hello from Romania! Nice to see good quality repairs made by a very skilled and good person. Thank you for your videos, Mark!

[@that_thing_I_do]

Amazing work...had to smile at the end. Decca, the label that turned down the Beatles.

[@stevedebeukelaer1424]

Very nice restauration congratulations

[@ricobass0253]

For future reference, you should use a shim to centre the magnet assembly as well as the coil into the gap. 7 thou plastic film is the norm. Remove after you've tightened the screws and/or the adhesive has cured.

[@RGD-Games]

awesome :) I have used the spray Plasti-dip, with good success, to repair splits in speaker cones... It fills in the splits, and dries rubbery, but still flexible, and found that it really "bites" into the cone paper, so the repair is very strong and withstands the movement of the cone when the speaker is in use :) The fact that it dries black too, is a big bonus :)

[@buttyboy100]

I use Evostik impact adhesive for the same reason. When dry it remains flexible.Saves having to stick patches over cracks. If the cone has become deformed by damp spray it with isopropyl alcohol (surgical spirit from the chemist) and as it dries it magically pulls the cone back to its' original shape. Been using both methods for 50 years and never fail!

[@Radiocruncher]

That speaker looked a bit scary to take apart. Great job and a very nice Bluetooth modification. Cheers Graham

[@gregorymartin8139]

I enjoyed watching this craftsman at work. Expert, unhurried and modest. The video production is also a model for others to follow.

[@shodan6401]

For speaker voice coil gaps, the most reliable method is to use four equally sized shims. Same for gluing the surround. Use four or six shims to lift the cone up enough to get your adhesive in with a spudger. For cleaning tube sockets, a straight eye liner brush really does the trick, with some Deoxit. Put it right as rain.

[@weyayemanjoe3082]

Awesome job Mark watched the first part and what a great Job you've done, nice touch with the Bluetooth add on ❤👍🏻

[@Jammerk40]

Very nice work on the restoration and I would have put some material over the speaker coil to protect it from debris!

[@gasmonkey932]

brilliant work

[@Hagemann666]

What a remarkable intellect, personality, and craftsman. Most of the stuff Mark does is above my paygrade but I've actually learned a fair bit from watching his channel. He could have simply replaced that speaker with something modern but it's so much cooler that he lovingly repaired the vintage driver and kept things as original as possible (with the exception of the Bluetooth module but that ensures this old radio will continue to be used for many more years). Wonderful stuff!

[@allanredford6070]

this was someone's pride and joy, back in the day, very expensive,relative to typical earnings back then.high-tech,think top-flight streamer in oday's terms. liked the video,superbly done. nice you preserved it, for future generstions. there can't be many still around.adding 21at century microelectronics great fun. can't help but thnk that in 80 years from now, that part won't be so serviceable/saveable, if it fails, like this unit was.overall. finally, think, that if you want, you should consider Patreon, to reward you further for your efforts.

[@tutnallman]

I would use PVA on the cone, but a neoprene glue on the corrugations to avoid stiffening the suspension- Great work BTW,

[@michaelmiller641]

What a classic design!

[@tejashwiyadav906]

you have done an amazing work of soldering all SMD components with hands and a microscope like a robotic arm will do in a factory. immense respect love from India.

[@TomLymberopoulos-du5he]

Mark you are amazing mate! I've worked on a 1958 Sharnsberg Strauss Radiogram. I updated the Record Player from a Monarch D3 (I think that was the model number)? And fitted a BSR semi auto record player using a crystal cartridge or maybe I used the other type to run with the vintage receiver. It worked like a charm. More videos of your amazing work please.

[@oscarm8445]

Have to watch Mr Electric work on speakers with certain glue dissolvers and the paper cone comes out easily. They make it look so easy.

[@mwoldringh]

I discovered your channel recently and am baffled by your knowledge and skills. I really enjoy watching this 🙂

[@mattnoyes7729]

Just brilliant...so impressed with that speaker repair, but all of it was very engrossing!

[@kilcar]

Great music too at the end!

[@pjono77]

Outstanding work Mark.

[@peterkendell5214]

That's a lovely restomod, but I sometimes wonder how well old amps and speakers handle present-day pop and dance music with their greatly enhanced bass.

[@chrismurphy8383]

Always wondered where the corners of a circle were --- many thanks for clearing that up

[@fulwell1]

What a lovely old thing it is!

[@alan.schertz]

Man I’m so enjoying your content! I loved that you played khruangbin thru the Bluetooth interface on the Ducati. I really like the decca 78 as well!

[@eelofgold]

Are you selling your audio interface board anywhere? I’d buy a couple! Even better if it came as a kit 😁 Love your work, keep it up.

[@DaTuba5]

Great work as usual. My only add would be to include some sort of mixer on the stereo output of the Bluetooth module. There might be sounds in the source that are only in one channel that would be missing in the final output if only one channel is routed to the output.

[@tonbouw6180]

the best repair i skipped tru it , but man, hats of to you ,,, amazing skills,,, IM JELOUS AND BEOND... should have tryed harder in scool in my young days,, nevertheless,, you teaching me im catching up fast hehe,,, keep it up,, quality craftsmen,, swell job you did, and doing all day long

[@LZDEN]

what a fine piece of work Mark...excellent.

[@SergZak2023]

Thanks, Mark. Always a pleasure to watch your content. Keep up the great work!

[@joshyapplecider]

Awesome, and also awesome you’re a Kruangbin fan !

[@Eggosj]

Like your video’s , though I must admit 9 out of 10 is beyond me due to my lack of technical education. Radio’s have always fascinated me, wish I knew more. Keep up the good good work.

[@MattTester]

Great work Mark, the interface module is well designed to get around those annoyances with BT modules. All the best for the new year.

[@mortenstampemortensen3911]

Tak!

[@randyberger4910]

Excellent work. I like the record that is playing, and excellent fidelity too.

[@studs9845]

i found your channel last week and I cant stop watching your videos. great work and attention to detail. Keep them coming

[@francomarianardini681]

what you do always surprise me! a real master! thanks Mark!

[@ruudmobile6726]

Wonderful repair Mark... really happy I have found your channel... with DaveTiptons my 2 favourites... btw some pledge furniture wax makes the cone pliant again....the pva also does a great job

[@highpath4776]

i always said to David Tipton that we used to when listening to the Radio back in the 1960s. the well aim thump with hand to the side of the case normally got most loose bits back into making some kind of contact.

[@CoroaEntertainment]

10:24 Those 4 screws are tightened down last (leave them a bit loose). First, set the mag/motor assembly in place, and tighten. Then flip over the speaker and use some thin paper strips (from a cut up business card), and slide them into the coil's air gap (alternating sides to make sure it stays centered in the gap). Once it's centered, turn the speaker over again and now tighten down those 4 screws. You now have a perfectly centered voicemail, but leave the strips of paper in place (for now). Now glue down the rim of the cone and use a whole bunch of clothes line clips to clamp it down until it dries. Once it does, slowly pull out the thin paper strips from the coil's gap. You can help keep any dust and dirt from entering the coil gap in the future by gluing on a small round dust cap. Btw, you could have used the same paper strip centering method when you were trying to center the motor assembly (at 9:29).

[@thijsvdakker1615]

Indeed, that’s a good way to do it, had some great results myself with that..

[@rjones5296]

Watching this, the red and the green wire coming out of that coil most I’ve seen or always cloth covered wire so I wonder if once upon a time that was rewound and then the feed out wires were plastic insulated. The next thing I noticed, and I thought about it probably in your schematic that magnet coil to energize, the speaker is normally used in the power supply as a choke. Gotta love Field coil speakers. Gotta admit how serviceable those were unbelievable. But anyhow, really cool video very addictive

[@hydorah]

Love your vids and your skill level is stellar. I have a lot of experience working with old speakers and I find a better patch material is toilet tissue or kitchen roll, all other aspects just as you do. You can use just one ply and your repair will conform exactly to the undulations in the cone and once dusted over with paint becomes almost completely invisible, personally I do both sides with repair and paint. It dries to be perfect in terms of strength and making no effect on the weight, movement or balance of the cone whatsoever. Really glad I found your channel!

[@tomlibero3780]

Wonderful eqipment, wonderful serviceman😊