1966 Marshall JTM-45 Mk II in for Repairs......A Rare and Wonderful Gem !!
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- Опубликовано: 27 май 2021
- This video documents the repair of a splendid 1966 Marshall JTM-45 MkII amp sent to us for repairs. The initial problems cited were a "gap" in one of the volume controls and a tendency to "red-plate".....but, as you will see, other issues arose. Also, due to the "special nature" of this wonderful old amp, we sought to make component substitutions as unobtrusive as possible.
In addition, we open some gifts from a very generous viewer.....with Jack and KC's help, of course.....and feature a second video showing one method to repair a "scary" problem in a BF Super Reverb.
Thanks to all our Patreon patrons and PayPal contributors for your continued support, and to all of you who helped us reach the lofty goal of 100,000 Subscribers !!! Way back when we posted our first video on YT, we never dreamed things would turn out this way......and they would not have, without our wonderful viewers. Thanks for making this such a rewarding experience.
If you would like to support our channel, please consider becoming a Patreon patron at / uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Regardless, we really appreciate your time and interest in our channel. 
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Who needs Netflix when we've got 76 minutes of Uncle Doug ?
Thanks so much, Giuseppe :)
Exactly!
Agreed!!
Bravo.
I know! My wife couldn't wrap her head around why i enjoy these so much, then she started loving to listen to him and she is not even a musician! I also steal many of his "Uncleisms"! One of my faves: we have wires hanging like a dis-embowled Antelope!😄
Hooray! an hour of amp fixing and dry humour!
I hope you enjoy them both, Daniel :)
Me as well Uncle!! I wish i would have had a teacher like you when i was younger! You make learning fun!
Delightful.
I cant imagine a thumbs down for unc!!
... and music!
A few comments on the video: 1.) I say "6V6" instead of "6L6" at 1:11:20. 2.) Thanks to Robert Set for the opening musical montage and logo. 3.) We tried jumpering Ch. 1 & Ch.2 for the audio demo, but for some reason it did not record well. 4.) It should be noted that Jim Marshall himself did not actually build the amps.....this task was done by Dudley Craven and Ken Bran.
Definitely feeling the opening montage.
Although Jim would frequently be covering cabinets in the early days and his signature can be found inside...
Who has a better story than Bran? jk
Uncle Doug is my favorite amp repair guy. His knowledge is very good and his attitude is the best. It is no wonder that people send him so many gifts. He is a wonderful human being. The world could use several billion people of his demeanor. The work displayed in this clip is highly commendable. Pretty much the norm for Uncle Doug.
Wow....thanks so much for all the very complimentary comments, Tony :)
agree . . .
@@UncleDoug will leave the most revered comments.
@@iceWaterProductions1 Thanks :)
"Well, greetings out there in RUclips land...." - when I hear this I know we are in for a treat! Thanks for the amp tech videos Uncle Doug!!!
Thanks !! I hope you enjoyed it, Charles.
Doug can give us British a lesson on dry humour :)
My Temptations starts now, I purr.
@@PandemoniumMeltDown maybe Jack or Casey will share their treats with you :) 🐱😺 meow
You generate a whole new respect for quality work on quality equipment. You go the extra mile.
Thanks so much, Cloyd :)
Uncle Doug getting a new video out means to stop anything, grab some tea or coffe and getting into yet another great repairing session with great humor :) I will need to get one of these Marshalls, some day...
Thanks so much, Andre. I hope you enjoy it :) We all need a JTM of our own :)
Check out the new Marshall Studio amps... while they are PCB instead of hand wired, their build quality is outstanding. Fact is, Marshall could teach Fender (and others) a thing or two about amp design.
Stop anything and grab some tea to watch ? André, do you have a spycam in my living room that I'm not aware of ? 🤔 I was supposed to start working, but got « distracted » by Doug's entertaining offering 😂
Thank you uncle Doug!
YW, P ;)
Wow that tip on stopping the high frequency oscillation was absolutely fantastic. I really appreciate that. Thank you so much, I will store that in the old memory banks. Great stuff.
Thanks, Leonard. Glad you enjoyed the video.
Such a wonderful attack / decay and shimmer on this amp! Yes indeed , a hit maker in the studio !
Who else exploits the incredible clean Marshall settings.
@@karst41 Hendrix for one
I agree, Enid. One of my guitarist friends commented on the "chord bloom and chime".......it's a very special amp :)
I never miss an Uncle Doug video.
Were honored to hear it, Peter :)
I have never in my life heard a Marshal clean channel sound so nice over yout tube , holy cow batman
Thanks so much, Jerry. High praise indeed :)
I never try the dangerous stuff at home. I used to do it at the neighbor's, until the fire... Anyway, great video! Thanks UD!
Safety begins at home, FWR......to heck with the neighbors ;) Glad you enjoyed it.
Love the new intro.
Created by a very kind viewer, from Poland, I believe :)
Uncle that sounds fantastic brother, you're a genius.
Wow....thanks, Harmon :)
sounds silk smooth ... you are a magician
Thanks twice, Bruno :)
Congratulations Doug on achieving your 100,000 subscribers -you thoroughly deserve it. The knowledge and the humour with which you pass on that knowledge makes every video a treat. Thank you for all of the effort that you put into each video. Thought that you might like to know that our new puppy - Penny is totally settled in and is proving to be a fantastic little character. She has brought a smile back to our faces after all of the health issues that I have and continue to have. Take care and it’s great to see you and your animal family back.
Thanks so much for all your kind words, Robin. All our love to Penny and best wishes for better health.
I can't tell you how much I appreciate your tuition, passion, love, care and respect for the craft. You truly are an inspiration and my favourite educator in this field by far. The efforts you go to to bring us these videos and the knowledge passed on during them are truly appreciated. Thank you, really. Best, Scott.
Wow, Scott, what a wonderful series of comments. We truly appreciate your kind words.
This my old amp! Of the hundreds of Marshall's I've owned, this was the BEST Marshall I ever owned! Should have never sold it...lol. Happy to see it's pretty much in the same condition as when it left me!
Wow.....it's a small world. Thanks for the input :)
UD IS THE BEST ENTERTAINMENT AND TECH INSTRUCTION IN THE WORLD
Wow......thanks so much, Rax :)
I'm just a guitar player. No electrical knowledge before finding your series of videos. I am always fascinated watching you work and explain all of the dark voodoo magic of electronics. Your attention to detail (respectful reverence?) towards this 66 JTM45 was awe-inspiring! I hit the thumbs up while wishing there was a guy standing on his chair applauding wildly I could trigger to let you know how much I appreciate your desire to always go above and beyond! Cherry custom shop work!
Wow....thanks so much for all the very nice comments, Kieron. We really appreciate hearing from you.
Super professional repair! What a Classic old amp. A dream amp in pristine condition. Thanks Uncle Doug 👍
You're welcome, Bob. So glad you liked it.
Thanks uncle Doug for the 2nd part of the video. The current limiter can really save tonnes of money as well.
And in the first video, the sound of the JTM with P-90s is a killer. Wow! 💪🏻
Glad you enjoyed the video, Shade.
Another great amp repair thanks Uncle Doug.
You're welcome, Nigel :)
Superb video Uncle Doug. Some very innovative cosmetic enhancements with the capacitors that preserve the visual integrity of the amp. So much so that I consider the film to be worthy of mention and inclusion into the Smithsonian archives. We took these amps for granted many years ago here in the UK, so nice to see yourself and others appreciating and maintaining what you rightly describe as 'Jewels'
Thanks so much, F2 :)
Congrats on reaching 100K subscribers! You're the best repair person on RUclips!
Thank you so much, Jeff 😀
100k IS quite a milestone. Well done - it is an acknowledgement of the quality of your channel!
Sir you are amazing God Bless your excellence in your work !
Thanks, LH :)
Hi, I really enjoy your videos for many years. I wish I lived in Texas to talk you into letting me apprentice with you. I could learn more than I do from your videos alone. Thank you for your teachings. I've learned so much from you.
That's great to hear, Steven. We're really glad the videos are helpful and informative.
Thanks so much for everything you do, Doug. I have learned a ton. Love the snazzy intro, too. You're the coolest Uncle I never had!
Wow....thanks so much, Matthew :)
Congratulations on 100k! The Marshall sounds great with all the pickup varieties and your work looks fantastic!
Wow....thanks so much KM :)
I can't tell anything unless it's dimed
How can something be so enjoyable to watch ... even though i haven’t a clue what doug is talking about .
Wish i new more about electronics .
That's kind of you to say, Graham. Keep watching and it will gradually become much clearer.
Definitely go through Uncle Doug’s back catalog and I can also recommend the channel Mr. Carlson’s Lab.
You are the man, Doug. Good job.
Thanks, LB :)
Congrats on that new intro, Uncle Doug!
Thanks, David. It was created by a viewer from Poland.
Uncle Doug, love the channel, your attention to aesthetics and electrical precision makes it “must-see TV”! Congratulations on reaching 100K subscribers! Next goal is 250K. We’re all pulling for you!!!
Wow....thanks so much, Gerald :)
nice fix . . .thanks Doug . .no ads . . .
enjoyed part 2 so well explained thanks once again uncly doug
@@Headwind-1 Glad you enjoyed them, Ged.
Great job, Doug. Tanks
Glad you liked it, Gianni.
Here's a saying that I heard all the time about these amps.
"It's only 45 watts, like a Bassman .... but those are British watts !" LOL
After being blasted by one of these jewels, I concede the wisdom of that statement, Zanky :)
@@UncleDoug , are those "keep calm and carry on" watts, "stiff upper lip" watts, or "get on with it!" watts? 😁🤔
@@goodun2974 Seagoon Watts.
RMS rather than peak measurement ?
@@highpath4776 "Seagoon"? Some British phrase which, as an American, I am not familiar with?
I see super amp tech has been here. A sad, lonely down vote. I have a dilemma now, because I am not super motivated to work on a Friday before a holiday weekend and Uncle Doug drops some amp goodness on us. I think a long lunch is in order.
Take the rest of the week off, Paul, and join me in scorning the slimy coward who voted "thumbs down" ;)
Those original GEC KT66s are nearly indestructible... great video.
Thanks, Hilario :)
Genalex
@@vayabroder729 Both are the same. General Electric Company, Ltd., Magnet
House, Kingsway, London W.C.2,
England
Osram Marconi
That was absolutely brilliant that. Thanks.
Glad you liked it, David.
Why am I strangely drawn to watch these videos 3 and 4 times.....what's wrong with me!!!
Sounds like a case of good taste to me, R&B ;)
Look I dunno what the hells wrong with you rnb, but stop spreading it round will you ok? It could could be the next pandemic.
Uncle Doug rides again!
Thanks for joining us, Bill :)
Great tones. Even on my phone speakers. I'm sure it's a million times better in person. Great video
Thanks, Jason :)
What a gem!
Agreed, RC :)
ERIE caps are definitely original, I replaced a handful of them in my vintage Laney Supergroup.
Thanks for the info, SK.
@@UncleDoug It was originally an american company, but i found some information about the UK branch:
www.ourgreatyarmouth.org.uk/page_id__455_path__0p3p41p.aspx
Highly doubt that it’s an original, most likely the cap would have been a Radiospares. Never seen an Erie in a mid 60’s Marshall unless it was a replacement.
@@MichaelJWane Well maybe it's not original for Marshalls but I believe Laneys are built with them, because in all the pictures you can see them.
Actually that amp would have been Hunts (taken over by Erie in 1969 so no, not original
Good job. However, you're cutting your clips short in editing cutting what you're saying off mid word/sentence.
The editing program cuts at even seconds, not fractions of a second, so occasionally a word may be truncated. I reviewed the video several times and only noticed this once or twice......which, hopefully, did not ruin the whole video for you.
@@UncleDoug Nice to be told why.
you are the best teacher
Thanks so much, Antonio :)
I was lucky enough to own a '64 or '65 variant of this amp between 1969 and 1974 here in the UK. It had the Marshall name in a solid Perspex plate, and the knobs were the larger variety with brushed aluminium faces. Other than that, the amp here seems pretty much identical, with the weighty transformers and the KT 66s. I loved that amp, but it had a chequered history. I once loaned it to a pal, who forgot to connect the speaker cab and promptly burned out the output transformer. Then I had it stolen - twice! The first time it was recovered thanks to a diligent police detective and a pretty stupid thief. The second time, it was lifted from the band's van, and that was the last I saw of it. So thanks for the memories, Uncle Doug! Always love it when a new video appears.
Sorry to hear of your loss, David, but thanks for sharing your experiences with us :)
Thank you for a great doubleheader video, Uncle Doug!
You're welcome, Hub.
Always look forward to seeing your videos .
Thanks !! Glad you like them, VW :)
Man Uncle Doug your attention to Detail and keeping this amp looking original is awesome I can’t believe I missed this video .
Thanks, Ricky. Glad you enjoyed it.
"When I grow up I want to be a guitar player. I want to be able to have enough money so I could buy a huge amp named a Marshall Full Stack."
I wrote this for a school paper when I was 12 years old! Still don't have the Marshall but the neighbors thank me for that
It never hurts to dream :)
Great episode, thank you!
Glad you enjoyed it, William.
You're the best Doug, great walkthrough and explanations!
Thanks for joining us, CG :)
Uncle, you are a genious.
You are too kind, Ulrich.....but thanks ;)
Yay! Uncle Doug is back!!
Great to be back, T&J :)
I had to look up parsec ... Ha! Uncle Doug, you kill us! Love it. You make me want to acquire more amp knowledge than the difference between volume and attenuation.
Glad you enjoyed it, GT :)
Cheers from Brazil!!!
Regards from the sunny (hot) Southwest, USA :)
Enjoyed the sound clips with settings at the end!
Glad you enjoyed it, M.
another great video. i really enjoy how you are showing the detail in the actual work as well as the schematics you use. thanks!
Thanks, Michael. We're glad you enjoyed it :)
Above and beyond with that Erie concealment cap. Really nice work Doug👍
Thanks so much, Rob.
Thanks for another great video, Uncle Doug! I learn something new from you each time, and am thankful for such a great resource and archive.
You're very welcome, Colleen. It's good to hear from you :) Best of luck with your rapidly-growing channel.
I am glad to find this channel. I am planning a couple of upcoming projects to keep my brain busy. Both being replicas of vintage Marshall amps. One being a jtm45 and the other being a jtm45/100. I want to be as authentic as I can be so great to watch these videos.
We're glad the videos are helpful, William. Good luck with your projects.
Another fantastic video. Thank you, Uncle Doug!
Glad you enjoyed it, Nick :)
MacGyvering the Erie cap was total madness. Bravo.
Agreed, David, but trying new things makes life interesting :)
Excellent work as always Uncle Doug. Thorough and professional!
Thank you kindly, Scott :)
Thanks for another awesome video Uncle!
The pleasure was ours, Rick. Thanks for watching :)
Doug at 56:43 -57:08 I was really feeling it and diggin’! I liked all your playing, but that was where the real magic took place!
I'll tell Ollie and Jack how much you enjoyed it, MR. Thanks :)
Uncle Doug, thanks so much for the wisdom.
You're quite welcome, KD :)
The best start to a 3 day weekend here in the UK! Thank you, Uncle Doug, for another great dive into the fascinating world of tube amps! Always a pleasure to hear you talk.
Thanks so much, Matt. Have a wonderful holiday :)
Right on uncle Doug 💯
Thanks, Silvio :)
Uncle Doug, Bless you have always exceeded all of my expectations. Thank you for sharing your wisdom with us and keeping us safe!!!
God Bless and Protect your Family!!!
Thanks, F1. Likewise to you and yours.
Another Great Video of Knowledge!
Glad you enjoyed it, Rob :)
Your channel is such a gem! Everything from the history lessons to the technical content to the wit and humor... just fantastic all around.
Wow, thanks so much, 400B. We really appreciate it :)
I really enjoy yer videos. Keep up the great work and videos. I'm 70 now and still jamming. Rusty in eastern Tennessee
Glad to hear it, Rusty. Keep up the good work.
Thank you so much for this great explanation on how to repair this beautiful piece of art.
You're welcome, Gustavo.
Nice video thanks for posting
Thanks for watching, CB.
Thanks, Uncle Doug, for another great video, especially one about a vintage Marshall!
You're welcome, Bob :)
Congrats on 100k!!! The Marshall was an awesome sight to see... The special feature was VERY interesting as well. Thanks for taking the time to tack that one onto the end.
Thanks so much, Greg. Glad you enjoyed it.
Watching this makes me want to build a 45. In 1970 I bought a Marshall Major 200 watt full stack , talk about a wall of sound. Thanks for the video great as always.
Glad you enjoyed it, Dennis :)
I think it was Ken Fischer (Trainwreck Amps), formerly of Ampeg, who said he put Mullard KT88s in a Marshall Major and "sailed past the 300 watt mark".
Wow Dennis that setup must have been so awesome! Especially if you can play well.
Thank you for making me look into my Bugera amp problem...started with the fuse..and there it was a small fuse in a large fuse holder..rattling around..funny though the fuse holder was just a bit small for large fuse. so had to change the holder, works fine now. Thanks again and stay well.
You're welcome, Mr. A. I'm glad you were able to resolve the problem.
Thanks for the ever-informative and entertaining video UD. Very glad to see you back, had me a little worried during the dry spell.
Thanks for your nice comments and concern, Mark. The work load has been staggering, but fortunately we were able to post this video. I'm going to cut back on amp repairs and try to keep it all fun......again.
Why would anybody put a "thumbs down" on a video like this? The dude is trouble shooting a 55 year old amp that he has never seen before. Great Video!
Thanks so much, Lev. Don't waste any concern on the slobbering coward(s) who deface those videos they envy the most ;)
This thing sounds pretty good !
Thanks. It's sort of like how the Mona Lisa looks pretty good ;)
Really enjoyed watching this! Thanks UD
Our pleasure, Mick :)
Another fine amp repair video from Uncle Doug! Two landmark amps, a JTM 45 & a Super Rvb! So much to be learned from your electronix expertise. --> Thank you for your candor 😉
Thanks, Rich. So glad you enjoyed the videos.
It's since I am a marshall major fan since I own a 1970 and just an overall Marshall fan and that's cuz I use this for my bass guitars this makes it even more exciting!!!!!
We're glad you enjoyed the video, Charles.
Thanks for another excellent hour+ with Jack an friends!
Thanks for joining us, Brian.
Great video; great amp! Thanks for demonstration of current limiter doing its job in a real-life situation.
Thanks, Ed. Glad you enjoyed it :)
Congratulations!! 100K subscribers! I have and always learn a lot. Thank you.
Thanks s much, FR :)
Many thanks Doug for the wonderful video. As usual it's full of great advice. Your knowledge and humour are greatly appreciated.
That's great to hear, RN :)
Been watching your videos while I have been sick, very fun to watch! Your experience and knowledge shows very well!
Thanks, Jeff. Best wishes for a full recovery.
Oh yeah! Going to be the perfect saturday night watching this. I love these videos! Thanks uncle Doug
Our pleasure, RJ. I hope you enjoy them.
Another great video. I learn something everytime and your channel is the best on RUclips or any other media. Everything stops when a new UD video pops up. Thanks for the content.
Wow, thanks so much, MP. We really appreciate the kind words.
Great work, and plenty of teaching moments as is your usural. Thanks for the look.
Thanks, John. Glad it was helpful :)
That was great, and it ended up sounding fantastic. Thanks for sharing.
Glad you enjoyed it, JL :)
Simply an amazing display of talent, years of hard work and accumulated knowledge. Without doubt.,..Best in The Business!! Thank you Sir!!
Wow....thanks so much, DR :)
Uncle Doug, thanks for all of the video's and your Knowledge, Your the Best,
Thanks for watching, CF.
Glad to see you back with a new video Uncle Doug. Excellent troubleshooting skills as always, resulting in a great sounding amp. Take care my friend.
Thanks so much, Bob. You do the same :)
Happy to see you back Uncle Doug and congratulations on making your 100,000 subscriber milestone! There is no doubt that you’ve earned every single subscriber by providing the best content and advice on RUclips!
Thank you very much, Thomas. We really appreciate it :)