Dynacord DDL 12 digital effects repair

  Рет қаралды 138,686

Mend It Mark

Mend It Mark

Жыл бұрын

Mark repairs a 1983 vintage Digital Delay Line effects unit. It powers up, but has no output, and as usual, has plenty of problems.

Пікірлер: 222
@davidparnell2450
@davidparnell2450 Жыл бұрын
I found Mark whilst searching for some info of how to repair my Sony RCD-W100 CD player. His exploits in the world of repairing all sorts of audio equipment really is quite captivating. Never have I seen such electronic expertise demonstrated in such a charismatic way. Just amazing!! Thank you Mark.
@ingekvam324
@ingekvam324 7 ай бұрын
I recently restored a Dynacord GIGANT amplifier from 1969. It was a total nightmare. 79 capacitors, several resistors and transistors, new tubes, some bad pots, and so much more. After three months it's finally restored to all it's glory.
@knifeswitch5973
@knifeswitch5973 Жыл бұрын
I had the crappiest day I've had in a long time at work today. Just binged about 4 episodes and laughed my butt off while putting the finishing touches on my Trio TW-61. Thankyou sir!
@SteveGunnfl
@SteveGunnfl Жыл бұрын
Well done Sir. I would definitely have changed out those regulators and smoother caps because they've clearly been under extreme load due to the tantalums. The fuses did flash perhaps they need to be a surge tolerant type. I love this older gear its what I was raised on and so nicely built. I design a lot of my own stuff and I still build it through-hole in the same way and avoid SMD.... It's proven to be such reliable technology
@ChrisHopkinsBass
@ChrisHopkinsBass Жыл бұрын
18:05 - sounds like the soundtrack to a Pat Troughton era episode of Doctor Who!
@StephenSD-P25
@StephenSD-P25 5 ай бұрын
It's videos like these that further fuels my desire to continue to learn how things work as well as my beliefs of "why buy it when you can build it" and "why replace it when you can fix it". Great videos, please keep them coming!
@rodleger7132
@rodleger7132 28 күн бұрын
The sound from the speakers reminds me of the classic sci fi movie Forbidden Planet. Good job as always Mark.
@shaunmorrissey7313
@shaunmorrissey7313 Жыл бұрын
It's a pleasure to watch someone who knows what they are doing
@iandalton3839
@iandalton3839 5 ай бұрын
When I was still training, like in 1977, I used to maintain stuff on Ferries, fromrRadar, radios and to teletennis machines. I remember the size of the boards in them, about 2 feet by 18 inches, SRBP boards, which used to warp because they were crap, absolutely packed with 74xx chips, literally hundreds of them.
@alphabeets
@alphabeets Жыл бұрын
That was really interesting when those two fuses lit up!
@spumpstein9374
@spumpstein9374 5 ай бұрын
Great video. I really enjoy your jolly, good nature, chuckling at every challenge. You set a fine example for me. I tend to get a bit grumpy when encountering setbacks. You've given me renewed vigor to tackle a troublesome effects unit I've left lie for a bit. Subscribed!
@LZDEN
@LZDEN Жыл бұрын
Mark you never disappoint, excellent work mate, and a joy to watch.
@izzzzzz6
@izzzzzz6 8 ай бұрын
I have a few of the old Dynacord delay units for speaker delay. The battery dies and can leak. Think i replaced a few other things, a cap blew too i think, after years of no use. I didn't have the correct battery and needed it the next day. I had old lithium batteries that look like AA much bigger backup batteries. I couldn't solder to them so had to modify a battery cage and fit the larger battery that way. Pulled off a mini festival in a circus tent. very cool.
@mbnyc5401
@mbnyc5401 6 ай бұрын
Mark is a Renaissance man of repair! Amazing work.
@enyaisrave2831
@enyaisrave2831 5 ай бұрын
Japp 👍🙂
@phillcrossland6394
@phillcrossland6394 Жыл бұрын
Hi Again Mark, Another brilliant repair presented in a manner that makes electronics interesting with the right presenter. Keep up the good work
@marktubeie07
@marktubeie07 Жыл бұрын
18:04 Mark, I think you just composed the next science-fiction movie theme! I think this unit has had a rough life in some studio somewhere. Great video as usual mate, thank you!
@shyammohabir8283
@shyammohabir8283 26 күн бұрын
A renaissance man of electronic repairs indeed! Excellent troubleshooting skills Mark!! I'm looking forward for your next episode! - I reciently came across your channel - I've been binge watching it ever since! Thank You!
@BlewsDr
@BlewsDr Жыл бұрын
been doing this for 58 years and you are a good tech.
@Audiorevue
@Audiorevue 9 ай бұрын
You know I love how you fix it and then you notice some other problems with the potentiometers and capacitors and you decide to fix them too. Some repair text might say, oh I got it working and fixed its main problem and that's good enough, not you you make sure it works how it's supposed to work.
@luisvilleza2687
@luisvilleza2687 5 ай бұрын
Your skill and patience is amazing 😊
@IqbalKhan-hc1hv
@IqbalKhan-hc1hv Жыл бұрын
I just came across to your channel. I find it very interesting and liked it. You are joyful, confident, know what to do and how to do. Keep it up Mark
@shanenorman7262
@shanenorman7262 Жыл бұрын
That was an involved job. But such a beautiful vintage device. I still have all my old 80s gear
@jeromestevenfaigin6059
@jeromestevenfaigin6059 Ай бұрын
Old school for me I had change 15 leaky electrolytic capacitors for my 90s 1 pre-amp tube compressor/limiter and luckily I cleaned the board and it's fixed and it's about the 6th time I've turned it on since I've never used it. I like it more that I fixed it!
@robburbrink8277
@robburbrink8277 6 ай бұрын
I love the videos Mark, I look forward to new ones being made. Really enjoyed this one in particular, it's a really nice old delay, I'm so happy you got it fixed. It's pretty rare here in the US and quite pricey! Keep up the good work! Thank you Rb
@calypso22
@calypso22 Жыл бұрын
Excellent work, as usual. You make it look so easy.
@xpump876
@xpump876 Жыл бұрын
Enjoyed seeing this DDL relic bought to life!
@kendom33
@kendom33 Жыл бұрын
Another great video Mark. Very interesting as usual. Thank you
@marcinkossowski6579
@marcinkossowski6579 Жыл бұрын
Fantastic channel. Really fun seeing how you repair stuff. Love how informative it is. Getting this wholesome feeling as well. How you don't have 50 X more subs is beyond me. Keep up the amazing work! :)
@donlunn792
@donlunn792 Жыл бұрын
Excellent Mark. Love the Channel and your expertise. Brilliant.
@mmrva
@mmrva 6 ай бұрын
Mark, we love you. Thank you making these videos. Amazing work!
@Shaun.Stephens
@Shaun.Stephens Жыл бұрын
Thanks for another great video Mark. I'm pleased that I found your channel.
@audiomonster303
@audiomonster303 Жыл бұрын
I watch your channel for hours!
@MikeGervasi
@MikeGervasi 6 ай бұрын
Another great one. Your methods are sound and you are very thorough. Really great work.
@user-ps8fy1te6p
@user-ps8fy1te6p 6 ай бұрын
You always pull through on repairs good work
@michaelclutton8446
@michaelclutton8446 Жыл бұрын
Thanks for the video Mark, very interesting repair
@madtopp
@madtopp Жыл бұрын
sounds like a bbc sounds affect tape/record i was waiting for the doctor to appear or a darek to bust through the door screaming exterminate😆. it amazes me how a spent cap can cause them kind of problems another excellent video mark
@geyerking
@geyerking 2 ай бұрын
This was highly entertaining. Thank you!
@Oldgamingfart
@Oldgamingfart Жыл бұрын
Those Roederstein caps always seemed to failed short! And the brown plastic ones don't usually fair much better, as anyone who's worked on vintage B&O equipment will know. Glad you blanket replaced the crucial ones!
@brianschaefer4276
@brianschaefer4276 Жыл бұрын
Ll
@brainbuginfestation8548
@brainbuginfestation8548 Жыл бұрын
Can confirm! I had a Systron-Donner PSU at work with a dead channel. Turned out it was a shorted golden ROE. Dead short!
@Oldgamingfart
@Oldgamingfart Жыл бұрын
@@brainbuginfestation8548 They've definitely become a 'replace-on-sight' item, much like the dreaded RIFA X2 bomb!
@itsonlyme9938
@itsonlyme9938 Жыл бұрын
Those Brown caps used in Quad hifi gear in the 1980's
@rillloudmother
@rillloudmother Жыл бұрын
i have always considered B&O to stand for Body & Odor of audiophile.
@robinsutcliffe-video_art
@robinsutcliffe-video_art 2 ай бұрын
That is the thing with Dynacords. Wonderful engineering, caps and pots always fail, often switches too.
@NickT6630
@NickT6630 Жыл бұрын
This is such an excellent channel. Very enjoyable to watch.
@mikem9403
@mikem9403 Жыл бұрын
Yay, 2K subscribers! Congrats. Rising rapidly and deservedly so.
@JohnLloydDavis
@JohnLloydDavis 7 ай бұрын
You are really good at explaining what's going on as I actually felt like I understood what you were doing, great job :)
@demofilm
@demofilm 6 ай бұрын
Dynacord, really the top of the crop i think,. lovely repair thanks for the video
@zbaby82
@zbaby82 Жыл бұрын
Good job. Happy Christmas!
@damianbutterworth2434
@damianbutterworth2434 Жыл бұрын
I tryed soldering last night. It`s hard with cataracks lol. Looked a mess this morning in the light. I fix al sorts of things. love this channel. Wish I was so clever.
@bartmeijer1059
@bartmeijer1059 Жыл бұрын
I discovered you channel a few days ago... Nice video's, verry interesting to see a colleague repair man puts a lot effort on this equipment! Looking forward to seeing the other video's! Thanks! Greetings from the Netherlands. 🤗🤗🤗
@raatroc
@raatroc 2 ай бұрын
The intro music suits him so well ...
@user-bi2ke8hd3p
@user-bi2ke8hd3p Жыл бұрын
Хоть я и мало,что понимаю в английском, но вы большой молодец. Привет от радиолюбителя из России, конкретно город Омск.
@iantyler4045
@iantyler4045 Жыл бұрын
Great video on a professional unit. All tantalum caps are time bombs. I've seen them blow their tops off!
@RickMahoney2013
@RickMahoney2013 3 ай бұрын
Most people I don’t think appreciate you very positive attitude whiz is hard to come by in life these days.
@GoFlyYourselves
@GoFlyYourselves 7 ай бұрын
Where ever you are fixing this stuff, I hope the people appreciate the great work you do
@suspiciouswatermelon7639
@suspiciouswatermelon7639 Жыл бұрын
I don't recall ever reading about a failure mode of a capacitor as being "knackered".
@nutsnproud6932
@nutsnproud6932 Жыл бұрын
Thanks for the video Mark.
@oswaldclarke6247
@oswaldclarke6247 Жыл бұрын
Mark you are super cool to watch
@drummerhammar
@drummerhammar Жыл бұрын
Love your videos, keep it up!
@glumpy6079
@glumpy6079 Жыл бұрын
He's back!
@anthonybarra2391
@anthonybarra2391 Жыл бұрын
great stuff, watching all your videos, Mark you should be on TV. entertaining, educational and very interesting, thankyou for your hard work. ay it
@sonodrome
@sonodrome Жыл бұрын
Great video and awesome repair! Quick tip: the tang on those pots can be easily removed with side cutters, they are quite brittle and come off pretty clean
@enryfrank
@enryfrank Жыл бұрын
Beautiful video, thank you 👍😊
@ANTandTEC
@ANTandTEC Жыл бұрын
The inrush current looks quite close to breaking those fuses looking at the glow - even after replacing some old components. I guess its common for old components to draw more current than when they were new. I wouldn't be surprised if those fuses blow again after a few power cycles, especially is the unit is used in a warm rack.
@sdgelectronics
@sdgelectronics Жыл бұрын
They were supposed to be time delay fuses.
@k.sivaramakrishnamoorthymo8203
@k.sivaramakrishnamoorthymo8203 Жыл бұрын
Hi sir really your are genies, your are grant service Engineer i like you servicing method thank you once again.
@rillloudmother
@rillloudmother Жыл бұрын
those flat toggles remind me of my early days as a musician in in the late 80s early 90s!
@AllenCavedo
@AllenCavedo Жыл бұрын
Nicely done!
@nathkrupa3463
@nathkrupa3463 Ай бұрын
Great video sir
@Smokeslikelightningband
@Smokeslikelightningband Жыл бұрын
First time seeing this channel and holy shit this guy is just so charming and has a gorgeous smile. lmao
@Plons0Nard
@Plons0Nard 4 ай бұрын
7:42 "Black screws on a black surface" That is what Zaphod Beeblebrox said when he was in Hot Black Desiato's stuntship. "You press a black button and a black light turns on ...." Hitchhikers Guide to the Galaxy 😊
@iandalton3839
@iandalton3839 5 ай бұрын
and have you never heard the expression 'beware the blue tants'. They were absolutely notorious in TVs.
@James_Bowie
@James_Bowie Жыл бұрын
Bloody tantalums. Bane of my existence.
@sw6188
@sw6188 10 ай бұрын
Mine too. I call them hand grenades because they are notorious for going BANG! just when you don't expect it. Either that or they go dead short as these ones did.
@tiromancino_tt
@tiromancino_tt Жыл бұрын
super great job !
@diogenespatrick3516
@diogenespatrick3516 Жыл бұрын
thanks for sharing. saludos desde Mexico
@32herz
@32herz 8 ай бұрын
wow! out of all devices in the world you got this one! :D I have one broken DDL 12 too! I'd really like to fix it / have it fixed.
@markredlich4055
@markredlich4055 5 ай бұрын
Very nice Guy and interesting video,! Regards from Germany
@felixthecleaner8843
@felixthecleaner8843 8 ай бұрын
always impressed with your knowledge of what to do - how did you acquire such learning Mark - if I may ask. It's a pleasure watching how you diagnose and repair these pieces of equipment. Loved it when you connected the speaker - it sounded like the beginning of a Hawkwind album - awesome!
@bujorvoinea
@bujorvoinea Жыл бұрын
Congratulations.
@Jason-zh7wo
@Jason-zh7wo Жыл бұрын
Nice job 👍👍
@davidt.2921
@davidt.2921 Жыл бұрын
Hello friend, I send you greetings from Spain. I appreciate the time you spend showing us your work, it is very valuable information. I like the audio of your videos, the sound of the tools and equipment manipulation is relaxing. I would like to ask you for a repair video with only audio of the ASMR type. All the best.
@MendItMark
@MendItMark Жыл бұрын
Now that's in interesting request! I do deliberatly run some gear for the background fan noise (best sound is the 60 year old Tektronix 453 Oscilloscope), as I find it is more forgiving in the edit. My daughter also tells me that her friends watch me at night, as they fall asleep! Unfortunatly, I don't have the ASMR reaction, despite watching @WhispersRed ASMR channel. Perhaps I need more practice.
@ellesmerewildwood4858
@ellesmerewildwood4858 Жыл бұрын
@@MendItMark Please don't do ASMR, your commentary and the workshop sounds are appreciated. ASMR is creepy.
@adriandeb2710
@adriandeb2710 Жыл бұрын
Great video
@duncan-rmi
@duncan-rmi Жыл бұрын
I must admit to a grudging admiration for your "let's push some joules into this & see what glows" approach when faced with a short. I work a lot on revox gear, & this wouldn't work- before you found the duff cap buried in the middle of an audio card, you'd fry off the delicate tracks on the PCBs. I always think revox boards look like they were made by a talented but highly strung silkworm.
@saduniwathsala
@saduniwathsala Жыл бұрын
You have massive equipments library
@terrynicklin417
@terrynicklin417 9 ай бұрын
Brilliant repair! I did wonder about the 'hot' tants near the start, they were showing as 34 and 28C on the Flir, not a huge temperature I would have thought? It's one problem with the auto-ranging on these meters that things appear 'white hot' when they're just the warmest thing in shot.
@harshabugatti
@harshabugatti Жыл бұрын
Hey Mark, thanks for your channel. The most thing I like you is your smiling, happy face. Most of the electric and electronics professionals will have wrinkled forehead and tension (more over filled with ego). I really feel so happy till the end of your videos. Ohh BTW what is that foam spray that you used to clean the exteriors?
@floydlaza8751
@floydlaza8751 Жыл бұрын
I have dynacord gigant 3 amp from bouts the same era excellent gear back then
@javaleonilyn1299
@javaleonilyn1299 Жыл бұрын
Sir goodevening. I am philipino good work sir.
@JohnvL
@JohnvL 9 ай бұрын
😆 2:21 STILL have mine Sinclair Spectrum! 😂 I have it in 1985! ans still the software on cassette tapes and some books and wrote the software lines, and one dot missing and its not working ore stops at that moment. also have then original tapedeck for that. pfffff..... 38 years ago, where is my time goes? 😊
@DD4DA
@DD4DA Жыл бұрын
The most failures are related by dry capacitors. 1983 is a long time ago and the ELO Caps are well known, getting dry. Nice work...
@FernandoMoura08
@FernandoMoura08 16 күн бұрын
Hi Mark… I am a follower of your videos from Canada. Excellent work! … just occurred to me that I have an “vintage” Sony cassete deck TC 165 that needs attention… I know it’s not worth much, but sentimental value has no price…. Could be a nice piece for one of your videos, no? 😃 … anyway, congratulations and hoping for the next one!
@MarcosAurelio-hp1hp
@MarcosAurelio-hp1hp Жыл бұрын
Good morning we love electronics and repairs and restoration of appliances we are together..one more writing...go my like always
@janwesten1317
@janwesten1317 11 ай бұрын
I have repaired quite a few devices, and often, you can see the wires in the fuses move when turning on the power. But if they light up, I would replace them with slightly higher rated ones, even if they are slow-blow fuses.
@muhammadyousaf4574
@muhammadyousaf4574 10 ай бұрын
sir thank you very nice
@camhyde9701
@camhyde9701 7 ай бұрын
16:52 those top two 200mA fuses definitely got hot there
@pisotones2348
@pisotones2348 Жыл бұрын
I've had many issues with old ROE capacitors and that unit is full of them!
@JohnLinwoodUK
@JohnLinwoodUK 3 ай бұрын
Always a joy to watch your videos. One question, when you find a leaking or shorting capacitor why wouldn't you replace all of the similar capacitors?
@londonbluevideo
@londonbluevideo Жыл бұрын
Another excellent and interesting fixed it video Mark. Have you ever fixed any vintage B&O kit?
@padgepadgham3238
@padgepadgham3238 Жыл бұрын
Like A Job In The Town 👍
@peekaboo4390
@peekaboo4390 Жыл бұрын
Dynacord is excellent gear.
@lavorboys
@lavorboys Жыл бұрын
very nice !
@BeachCat
@BeachCat 9 ай бұрын
Great work, I love to see older audio gear being salvaged. However, butanone is a known skin irritant, as well as being flammable, and shouldn't be handled with bare hands.
@ferraridinoman
@ferraridinoman Жыл бұрын
Nice one Young Mark!! (1982! You weren't born!! ha ha!)
@jimalcott760
@jimalcott760 4 ай бұрын
Mark i would have liked this much better if had demonstrated some music being played through that equipment…. Thanks.
@esiakaharding9124
@esiakaharding9124 Жыл бұрын
you are very good
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