As an ex-navy ET (electronics tech) you bring back memories of instructors I had explaining tube behavior and circuitry. Now in my early seventies, I just finished rehabbing my 1960’s Magnatone M-15 during Covid days. Your vids gave me a lot of suggestions and ideas for trouble shooting various issues. Great stuff. Thanks.
@qua77712 жыл бұрын
Former AT here.
@davebollinger88632 жыл бұрын
FTM here. Still workin on basically radar "Error" amplifiers for guitar.
@UncleDoug2 жыл бұрын
That's great to hear, Rocky. Keep up the good work :)
@jimcatanzaro7808 Жыл бұрын
My father served in the Navy 6 years repairing radios amplifiers and television equipment in the Seabees 1969 too 1976 was in Spain Newport RI I wish I had his knowledge he is 74 now with dementia and still is fixing radios he horded so many tubes and iron and test equipment before he left and we use it almost everyday Nothing like USN Iron
@GuitarSmith.2 жыл бұрын
Sadly this video will have to wait until later as I have a complete refret and anxious customer waiting. But it will be the highlight of my evening while sipping a cool drink. Already gave it a LIKE as Uncle Doug never disappoints his viewers.
@UncleDoug2 жыл бұрын
Thanks so much, Martin. Spoiler alert: Keep your cool drink handy for the next video (early July).
@southboundsuarez98322 жыл бұрын
😂LOL! I know exactly what you mean! I feel for ya, I am ditching my responsibilities to as I often do, to watch this one! I suppose we are fortunate that our dear Unkie isn't too prolific with the output and timing of videos as of lately.... I would never get anything accomplished other than cutting in line here at the peanut gallery to make inconsequential and long replies and musings. But yeah+1 on like before viewed.
@UncleDoug2 жыл бұрын
@@southboundsuarez9832 Thanks, SS. With the videos taking 2 to 3 weeks to complete, one a month is about all we can muster :)
@jamesadams10642 жыл бұрын
Thanks for taking care of the kitties
@UncleDoug2 жыл бұрын
As a youngster, I could never have any pets......so now I'm making up for lost time :)
@1drumm2 жыл бұрын
🎸🙏🏻✍🏻 We all need a “Mentor” like “Uncle Doug”! Thank you for your devotion, and your experiential knowledge! Our Uncle Doug, THE TUBE GURU!!! 🎸🙏🏻✍🏻
@UncleDoug2 жыл бұрын
Thanks, 1D. We are honored :)
@danielthomas30572 жыл бұрын
So nice that you have such a kind heart toward kitty cats. You've taken in ferals that otherwise would not have faired well at all and brought them to health, have paid for vet visits and invited to be a part of your loving family along with Jack & Casey. Great to see kindness and caring.
@UncleDoug2 жыл бұрын
Thanks so much, Daniel. We are rewarded ten-fold for our kindness.
@mr.joshua6572 жыл бұрын
You know when an Uncle Doug vid drops in the morning, it's gonna be a good day.
@UncleDoug2 жыл бұрын
We hope so Mr. J.
@mr.joshua6572 жыл бұрын
@@UncleDoug Well, I was right. It turned out to be a pretty good day. Told you so! :-)
@UncleDoug2 жыл бұрын
@@mr.joshua657 That's great to hear, Mr. J. I hope we were part of it.
@richreid70982 жыл бұрын
My favorite uncle comes over for a visit! Always a good day!
@UncleDoug2 жыл бұрын
Greetings, Rich. Thanks for the hospitality :)
@alexdeleon71352 жыл бұрын
Victoria is indeed a builder of impeccable quality. Today's episode was well executed, and had proper deducing of the purported issues. The modifications have proven to be a signature of Uncle Doug's sensible preventative steps to longevity. I look forward to the next installment. Stay safe and secure dear uncle, there's a clown shoe living next door.
@UncleDoug2 жыл бұрын
I agree, Alex. Thanks so much :)
@jenniferwhitewolf37842 жыл бұрын
@@UncleDoug Looks to me like he intended to outright remove the tree, but had only enough saw bar length to get through the stuff above the main trunk
@UncleDoug2 жыл бұрын
@@jenniferwhitewolf3784 Who knows what stupidity exists in the minds of men?" ;)
@iroffman2 жыл бұрын
Thank you, Uncle Doug, for another classic "Uncle Doug" video displaying solid methodology and logic leading to a happy result. Thank you also for the humour and the personal touch, behind the scenes, especially with Mitzi. She had a wonderful stroke of luck, finding you. Cheers!
@UncleDoug2 жыл бұрын
Thanks so much, Kort. I feel lucky as well :)
@raymondlau65072 жыл бұрын
Hi Uncle Doug ! You have a natural gift for keeping the presentations fun and interesting. Also, my 3 year old dog Copper goes BANANAS every time we see Jack, Casey, or the new kitty.
@UncleDoug2 жыл бұрын
Thanks so much, Raymond. Regards to Copper from all of us :)
@J.C... Жыл бұрын
Holy jeez. That's one of the nicest looking insides of an amp I've ever seen. WOW!
@UncleDoug Жыл бұрын
They really did a nice job on it.
@CraigHollabaugh2 жыл бұрын
Thanks Doug and thanks to Chelli for the gift. He lives down the road from me but have yet to meet him. Someday. Have a great summer Doug and stay cool. 😎
@UncleDoug2 жыл бұрын
You're quite welcome, Craig. Likewise....will do :)
@tonymanns8249 Жыл бұрын
I built that 5F4 tweed Fender Super clone from Mojotone kit. I'm a fan of class 'A' phase-inverters. I made a few mods: used a 5AR4, added an additional 47uF cap to the power supply, added a bias control potentiometer, rewired the choke coil to feed only the 12AX7 tubes; which increased the power output, installed a 50 watt output transformer. Great fairly lightweight 35-40 watt amp. :)
@UncleDoug4 ай бұрын
Thanks for sharing this with us, Tony.
@jaysorensenIBEW Жыл бұрын
I paused this at bout 15 minute mark, in order to see what DMMs are being used. Found them on ebay, and bought one. I'll get a second one if its really cool. I figured UD would choose a decent tester. When I looked through the reviews, sure enough, I see that UD has posted favorably lol. Thanks for making my life easier, sir.
@UncleDoug Жыл бұрын
You're welcome, Jay. I hope your new DMM serves you well.
@mark5150ty2 жыл бұрын
I know you always like to hide Easter eggs in your videos. I noticed that your closing frame was filmed before you added the negative feedback Loop modification and the 8 ohm tap. Can't fool me Uncle Doug, I'm always paying attention. You are absolutely the most entertaining and knowledgeable amplifier repair technician on KZbin. Looking forward to the next video.
@UncleDoug2 жыл бұрын
Thanks so much, DM, we really appreciate your kind words. Yes, the video scenes are often shot out of order and can keep you on your toes, watching for anachronisms.
@RJ-bn5uw2 жыл бұрын
I got to a feral mother as she was defending her last kitten from a neighbors pitty . I put both female cats in my house while I went thru some wall-to-wall counseling with a knuckle dragger . Both mom and kitten warmed up to indoor life and soon became very loving with long life . I don't mind the little rabbit hole we dive down when it's with our fur family . Great info all round , Thank you .
@UncleDoug2 жыл бұрын
Thanks for your care of our furry pals, RJ. It's inconceivable to me that anyone would allow harm to come to a kitten or puppy.....or any other small animal.
@montygore1200 Жыл бұрын
Wow. I have had one of these cap tester. and also sold it after getting an esr meter. What a mistake. These load the caps and are a great way to test. Loved the video.
@UncleDoug Жыл бұрын
Thanks !! You can still test for leakage by lifting the "downstream" end of the cap from the circuit, Monty.
@montygore1200 Жыл бұрын
@@UncleDoug Very true. Thanks Doug. Good test in almost circuit
@UncleDoug Жыл бұрын
@@montygore1200 You're welcome, Monty.
@TunedupFlat2 жыл бұрын
This was great Uncle Doug. Love watching your step by step walkthroughs of troubleshooting. I see that you have a neighbor that trims his trees like one of mine does... They must be related.. Excited for the next video!
@UncleDoug2 жыл бұрын
Thanks so much, Anthony. The next video will be special.
@fatstratcatdaddyo2 жыл бұрын
11k views, but only 1k likes?!? What's not to like when Uncle Doug pops yet another one out of the park? I love how you're so methodical... one step at a time.
@UncleDoug2 жыл бұрын
Thanks so much, FS :)
@Jeff-rh8mq Жыл бұрын
Well done with the cat! good for you!
@UncleDoug11 ай бұрын
Thanks, Jeff :)
@r.w.7470 Жыл бұрын
Hello Doug, Thank you sir! I really have learned something very different, yet very relevant from each of your excellent videos. And a warm appreciative shout-out to all the great classic amplifier enthusiasts / owners that send you their weary, ailing gems....so, for that I thank you and them. In your own style, you consistently prove, we Seniors, Rock. All the best!
@UncleDoug Жыл бұрын
Thanks so much, RW. We do, indeed :)
@pauldavis63562 жыл бұрын
Uncle Doug - good to see you again (well, see your hands anyway). Great video - keep 'em coming.
@UncleDoug2 жыл бұрын
Thanks, Paul. Will do :)
@marcomeloni96262 жыл бұрын
Hey Uncle Doug, I built my first amp last year from a marshall 20W kit. I just followed the instructions and it worked at the first try. Before starting the build i had no experience in electronics, and id been reading about safety and circuits for a couple months. So i wanted to understand how the circuit actually works. And then i found your channel on youtube. I know you hear this all the time but i wanted to thank you for the best instructional videos out there. The way you explain things makes it so easy to understand. Your channel is a national treasure! Im now getting ready to build a fender champ all from scrapped parts from old radios and reel to reel recorders, very much like your video. So again thank you for being the best teacher out there!! Greeting from an italian in Norway
@UncleDoug2 жыл бұрын
Thanks so much for the very nice comments, Marco. It's great to hear that the videos are instructive. Continued success with all your projects.
@camerond8176 Жыл бұрын
Eagle eyed viewers will notice in the ending comments he is displaying and talking about the chassis BEFORE any of the work was done as the 2nd output and NFB loop aren't installed yet..............The magic of television eh. Thanks again for the very informative video, and who ever built that amp clearly understands that ascetics are just as important as features even though most will NEVER see it.
@UncleDoug Жыл бұрын
Some scenes are shot (or re-shot) out of sequence, Cameron, just like with those big-budget movies at the Cinema-Plex :)
@camerond8176 Жыл бұрын
@@UncleDoug - I completely agree.................it's all in the magic of film and television. It's noticing little things like this shows the listener just how hard they are concentrating and listening/understanding to what's going on. I love your video's which are basically documentaries on these beautiful, and sometimes spiteful vintage amps. I'd send my amps to you in a heartbeat if they ever need repair. I love the attention to detail, quality of the workmanship and the no non-sense approach..............not to mention knowing you'll always be using quality/professional grade parts and not cheap Chinese parts ensuring long trouble free life.
@UncleDoug Жыл бұрын
@@camerond8176 Thanks for your very nice comments, Cameron :)
@markomaticd4106 Жыл бұрын
So much to learn. Hard not to be overwhelmed, but I figure if I learn one thing per day, that's pretty huge. Thanks for your clarity.
@UncleDoug Жыл бұрын
You're welcome, Mark.
@arb14302 жыл бұрын
So good to hear you again Uncle Doug !:)
@UncleDoug2 жыл бұрын
Thanks so much, AB :)
@RickMichaelis632 жыл бұрын
Good to see you again Unc! You must be busy or enjoying life!!!! Either way thank you for the video!!!!👍👍✌️😎🎸🎶
@UncleDoug2 жыл бұрын
Thanks, Richard. Always.....you too, I hope :)
@kengevers87382 жыл бұрын
Hi UD, nice video. One note to mention, I have the Fender Super Amp, and I changed the rectifier to a 5u4 from a gz34. A customer brought in the exact same amp as mine with a gz34 rectifier in it. An A/B comparison revealed quite a difference in gain. I didn't check the bias comparison, but if your customer changes the rectifier tube to a gz34, I am sure a re-bias is advised to cool down the 5881 tubes. Great video as always Uncle Doug 👍.
@UncleDoug2 жыл бұрын
Thanks for the info, Ken.
@johntempleton63682 жыл бұрын
Another great video from Uncle Doug. One thing that should be noted regarding the kill switch on the feedback circuit. IF there's a Fender presence control, opening the feedback loop takes the presence control out of circuit as that control is part of the feedback loop. FYI.
@UncleDoug2 жыл бұрын
Yes, indeed, but it's worth it.
@MrMersh-ts7jl11 ай бұрын
I known its a year later, but that rectifuer tube is excellent. Ive been running one with a mono Allied Knight mono amp. And itnlooks great in that particular amp. I got some winged C versions for a good price. NOS pairs on the auction place.
@UncleDoug11 ай бұрын
Thanks for the input, Mr. M :)
@SimonGotlieb2 жыл бұрын
What a pleasure this was to watch. Bless you Doug, you're a treasure.
@UncleDoug2 жыл бұрын
Thanks so much, Simon :)
@KeritechElectronics2 жыл бұрын
This amp may look inconspicuous but it's a real deal beauty on the inside. That's how you build amps! And that's the way amps should be modified too. None of that kludgy bullshit I've seen in many of them, some of which made me consider an amp not ready to power up before taking care of the rat's nest inside. 17:40 it's transliterated to 5C3S and it's a directly heated 5V rectifier pretty much like 5U4GB, same heater current and voltage, but coke bottle and can withstand 550VAC instead of puny 450V. Lovely car and meowsome cat for sure :) To state the obvious, talking about spots at the base of the tail, these are very scratchy and cats just love being pet there.
@UncleDoug2 жыл бұрын
Thanks for all the great comments, Keri. I agree across the board.
@nickdevriese2 жыл бұрын
I love his amps
@jimshomestudio46692 жыл бұрын
Me too.
@UncleDoug2 жыл бұрын
Thanks, Nick. Our customers have only the best :)
@johnbrady12112 жыл бұрын
Another enjoyable video. LDWMJ was a nice touch for the testing...
@UncleDoug2 жыл бұрын
Thanks, John :)
@goodun29742 жыл бұрын
Try using a 400 Hz tone, It's far less offensive to the ear than 1 kHz and it's excellent for finding intermittent connections and noisy controls because any distortion that comes and goes will generate a distinctive, buzzy sort of mosquito-sounding harmonic.
@UncleDoug2 жыл бұрын
Thanks for the tip, GU :)
@choimdachoim94912 жыл бұрын
Halfway through I'm thinking there must be something wrong with da guy's guitar or cables. I don't understand much of what you present but I love following your logical reasoning as you do your detective work.
@UncleDoug2 жыл бұрын
Thanks, Choim. Glad you enjoy our videos.
@bryanrulz39042 жыл бұрын
That tree was having a bad day Uncle D! LOL. Thanks for always bringing laughter and levity to this old crazy world.
@UncleDoug2 жыл бұрын
A bad haircut can really ruin your day, Bryan :) Our pleasure :)
@jonnybeck67232 жыл бұрын
Maybe a note of caution to our customer to double check the speakers in what/where this amp calls home (?) ...and thanx for yet another wonderful vid
@UncleDoug2 жыл бұрын
Thanks for the input, Jonny.
@jonnybeck67232 жыл бұрын
@@UncleDoug Thanx for the output UD... Wish I could get my ass out there to jam... Aah (>sigh
@gjvdspam2 жыл бұрын
I like the shopcat. Also like the oldschool capacitor tester
@UncleDoug2 жыл бұрын
Thanks, GJ. Mitzi is becoming more helpful with each new day :)
@telecomex2 жыл бұрын
Hi again Uncle. Just had to pause this video to say thank you for such a detailed and informative diagnosis. This amp really benefited from the time you have spent on it, as we all have. I sincerely hope you will be able to continue with these much appreciated & educational videos for as long as you enjoy creating them. I have learned everything I know about tube amps from you. As before, kind regards from way up here on the west coast of Canada/Vancouver! ss
@UncleDoug2 жыл бұрын
Thanks so much for your very nice comments SS. We really appreciate them.....and you. :)
@joeandnanroppolo2 жыл бұрын
Man! I am so glad I found your channel! I wacth everyday and have learned so much about tube technology in the last few weeks. Just built my first 5F1 kit. I would never have thought I could this a few months ago. The videos with Rusty are always a special treat. He must be missed around the shop. And the hot rods are a whole other subject! Dude you are everything I want to be when I grow up! 😂 it's like you really are my uncle! Thanks and keep the videos coming!
@UncleDoug2 жыл бұрын
We're glad you found us too, Joe. It's great to hear that the videos are helpful. Will do :)
@1drumm2 жыл бұрын
🎸🙏🏻✍🏻 We all need a “Mentor” like “Uncle Doug”! Thank you for your devotion, and your experiential knowledge! 🎸🙏🏻✍🏻 Our Uncle Doug, THE TUBE GURU!!!
@petercornell20022 жыл бұрын
Dougs home for Stray Cats, Hot Rods and Fenders! Well done.
@UncleDoug2 жыл бұрын
That pretty well covers it, Peter......but don't forget the Russian Pole Dancers.....always welcome :)
@87mini2 жыл бұрын
That Heathkit is a jewel! It's younger than my piece of Heathkit test equipment - I was given a Heathkit AQ-1 audio signal generator (circa 1957) by an old neighbor - and after a set of electrolytics, it's as solid as a rock (if you don't mind the analog frequency dial!) The head technician had a Heath cap checker similar to yours at one of the shops I worked for, and if he suspected a tech of shotgunning caps, he'd take it from the margarine tub and test it while the tech was away, then leave it on his bench with the results scribbled on a piece of paper. Needless to say, we mortals dare not step into his sanctum to test our own caps but he would break it out sometimes if we were stumped and he suspected leakage that we had missed. I wonder if someone has written a book about the whole Heathkit phenomonon - a real example of post war GI industriousness and excitement about the hi-fi craze. One thing I remember about Heathkits - when the owner was stumped by a problem, he'd bring his unit in with all of the encyclopedic manual, notes and records, and go over all of his prior troubleshooting in detail! I can't wait to see your future comparison video with the current magic box digital cap checkers. I use them, but don't completely trust them (how can a $15 ebay cap checker do the same job as the $450 B&K? circa 1975). Thanks for the great video, as usual!
@UncleDoug2 жыл бұрын
Thanks for all the great comments and shared experiences, 87. So glad you enjoyed the video :)
@rivulus2 жыл бұрын
Fran Blanche over at the Franlabs channel has quite a few video’s on Heathkit kits. Apparently she got started in electronics by visiting their repair facility as a child.
@UncleDoug2 жыл бұрын
@@rivulus Thanks for the info, Roelof.
@garfieldadamsakaj.stemmons3642 жыл бұрын
this might be the longest I've EVER sat through a video (made it to the very end)! but when the information is shared with such care, it's hard to turn away (plus I love cats). I'm a mixing engineer turned VERY rookie jazz guitar enthusiast and this level of information while difficult to understand, was still very interesting. thank you for taking the time and sharing your expertise, Uncle Doug!
@UncleDoug2 жыл бұрын
Thanks so much, GA. As a former teacher, I know how hard it is to maintain interest throughout a lengthy presentation. I am both flattered and glad that you did so.
@tomstiel75762 жыл бұрын
Gee Whiz Uncle Doug,,,I think this is the most enjoyable video yet,,,love the felines too,,,,miss the catscans,,,God Bless you and yours !!!
@UncleDoug2 жыл бұрын
Thanks so much, Tom. We aim to please :)
@BluegillGreg2 жыл бұрын
I enjoyed hearing your rhythm guitar playing. That amp sounds good too. ...and I learned a litte something today. Thank you.
@UncleDoug2 жыл бұрын
That's great to hear, Greg. You're welcome.
@Slugg-O2 жыл бұрын
Hi Uncle Doug. I hope all is well. The craftsmanship of the Victoria is amazing. The word "symmetry" come to mind when looking at he layout. I'm still a rookie with an opinion that's worth exactly what it cost and but agree that the 7581's were incorrect, and I suspect the fizzy and unstable output you could not reproduce was caused by the tubes being starved with a cold bias. As strong as they are it would seem logical that without adequate power they would never be able to stand up and sing as intended. The Ford grille shot and Mitzi bathing herself after dinner were an added bonus to an already excellent video. Thank you so much.
@UncleDoug2 жыл бұрын
Thanks so much Randy. It's always great to hear from you. Thanks for your input.....Mitzi sends her regards :)
@AnalogueGround2 жыл бұрын
You really got my hopes up there Uncle Doug - I was on the edge of my seat when it looked like you were going to restore a 23 1/4" Regular ice Scraper & Snow Brush.
@UncleDoug2 жыл бұрын
Sorry for the letdown, AG :)
@neutrodyne2 жыл бұрын
You always do a very nice job on your videos, and it helps a lot of people wanting to learn about amp repairs. On the speaker jacks however, the output transformer should always have a load on them when nothing is plugged into the jacks. This is why Fender always shorted the speaker jack when nothing was plugged into it. The reason being is if someone should plug a guitar into the amp without a load and then play the guitar the impedance of the output transformer will go sky-high. This can create large voltages and can cause the 6L6 tubes to internally short or cause the tube socket to arc over due to the excess hi-voltage across it. There should always be some kind of load on a tube amp to control the output transformers kick-back voltage.
@UncleDoug2 жыл бұрын
Thanks for your helpful input, Neutro.
@srtamplification2 жыл бұрын
Almost all modern electronic equipment power supplies use a Line-to-Ground and Line-to-neutral cap as EMI/RFI filters. They are supposed to be a special XY rated safety caps that are designed to only fail open.
@UncleDoug2 жыл бұрын
Thanks for the helpful input, William.
@audiotechlabs46502 жыл бұрын
Worth noting…..the 5E4A used 6V6GTs. Those 7581s are closer to a 6550 than a 6L6G. All in all another fantastic repair/mod! So glad to view your tube amp prowess UD, and another cat saved! You are the best! Love from NW Colorado. Thanxz
@UncleDoug2 жыл бұрын
Thanks so much, ATL :)
@c.p.1589 Жыл бұрын
2 diff tweed supers. The second version Used 588/6L6
@sonnysilversmith2156 Жыл бұрын
😂my wife just went crazy @ 42:00 test tone😅, I’m sitting about 5’ across the bedroom and enjoying this jewel you’re working on with a cup of coffee, awesome video.
@UncleDoug Жыл бұрын
Sorry if the tone upset her, Sonny, but I'm glad you enjoyed our efforts ;)
@velvetsound2 жыл бұрын
This is a great video on the troubleshooting process for the power section, and is the one I ended up following to debug my DC30 clone build after trying some less effective processes.
@UncleDoug2 жыл бұрын
Thanks, Jason. It was our intention to provide a rational approach to the testing procedure.
@KorbenDenver2 жыл бұрын
@jason Doherty, how did I know I'd find you here LOL =p
@velvetsound2 жыл бұрын
@@KorbenDenver Hi buddy!
@Projacked12 жыл бұрын
Wow there is something airy in the background of the sound....really nice for the ears. As if you are outdoors. Awesome video as always Uncle D! And I learn so much from this....
@UncleDoug2 жыл бұрын
An interesting observation, PJ. I had a fan running, aimed at me, to make the 100+ degree workshop more bearable.
@wtangodelta17152 жыл бұрын
Love you Uncle Doug! Glad yer still Kicking the 'Ol provervbial Ass, you reformed hellraiser you!!!!!
@UncleDoug2 жыл бұрын
Thanks so much, WTD. We're still kickin'.....with both feet at once ;)
@dwaynedelario2 жыл бұрын
Another masterpiece theater installment, thank you Doug! That amp sounds absolutely wonderful. I have been trying to purchase those Eurotubes bias meters ever since you demoed them a few moons back and they are still sold out! Very much hoping they return to market some day, being a much safer alternative to the shunting method that gives this particular amateur the heebies.
@UncleDoug2 жыл бұрын
Thanks so much, DD. I really don't recommend the shunt method for PC measurement.....dangerous to mankind and equipment. Simply measure the voltage drop across each half winding of the OPT primary.
@74cannelle2 жыл бұрын
That’s for sure the best way to go
@SimonGotlieb2 жыл бұрын
Those Eurotubes bias meters are fantastic. I bought mine a couple years back after watching Doug using them. Wonderful, wonderful tools.
@UncleDoug2 жыл бұрын
@@SimonGotlieb Agreed, Simon. I don't know how I lived without them :)
@fichambawelby26322 жыл бұрын
Hello again, Doug, with another excellent video, amp, and...what a gift!. I am searching for one of these cap testers for ages!. It seems to be difficult from here in Spain. And also: be very careful with the tester, because it outputs as much as 600 dc volts in the banana jacks. Never forget to discharge it, and put the test voltage knob at its minimum, because we need to see your videos during too many years! 8-) Thanks a lot, and God bless you, Doug & the cat gang.
@UncleDoug2 жыл бұрын
Good to hear from you FW. Thanks for the safety tip :)
@fichambawelby26322 жыл бұрын
@@UncleDoug safety first, you know!
@danielsaturnino57152 жыл бұрын
I say one should have a couple of amps, guitars and cables just for troubleshooting. At least that's what I tell my wife :) thanks for the video!
@UncleDoug2 жыл бұрын
That's a great tactic, Daniel, as well as a young Swedish female assistant to hand you the soldering iron.
@danerickson1632 Жыл бұрын
Nice job Doug
@UncleDoug Жыл бұрын
Thanks, Dan :)
@ratta20068 ай бұрын
Wow My first Stratocaster Ibanez 1976 Silver Series...Great guitar..And My first Ap was a Super Reverb 45 Watt 1972!...I'm going out to buy a lottery ticket!
@UncleDoug8 ай бұрын
You're on a winning streak, Ratta.
@MrMeik19702 жыл бұрын
Everyone needs a Workshop Cat Uncle Doug 😃👍🏻
@UncleDoug2 жыл бұрын
No kidding, Meik :)
@tonymanns82492 жыл бұрын
Great review Doug. I like the Fender tweed amps, I have both a Mojotone Super tweed amp kit and a Fender '57 Bandmaster reissue hand-wired tweed amp. I love their looks and their tone.
@UncleDoug2 жыл бұрын
So do I, Tony. They are wonderful amps.
@montygore2 жыл бұрын
Bless Missy. Takee good care of her
@UncleDoug2 жыл бұрын
Will do, Monty. She's a sweetheart :)
@Scott-rz9vw2 жыл бұрын
Thanks for the video and the laugh. That is a nifty hat rack in your neighbor's yard.
@UncleDoug2 жыл бұрын
Thanks for joining us, Scott. The neighbor also gives haircuts......if you're interested.
@imaginenation32802 жыл бұрын
Im a new sub and Fan of your teaching . Then you go and be a kind man as well saving animals . Big Respect from So Calif .
@UncleDoug2 жыл бұрын
Welcome aboard, IN. Thanks so much :)
@copperaudio9664 Жыл бұрын
That amp sounds great with P90's Top shelf troubleshooting Uncle Doug.
@mikewilliamson75732 жыл бұрын
I really love your videos!.. you've given me the insight and confidence to work on my own amps...thanks so much Uncle Doug!!
@UncleDoug2 жыл бұрын
That's great to hear, Mike. Keep up the good work :)
@charleslambiase56702 жыл бұрын
My buddy Uncle Doug 🥰
@UncleDoug2 жыл бұрын
Yes sir, Charles.
@dlunsford19802 жыл бұрын
The presence on the 5F4 is pretty enimic. Also it should be noted that when turning off the NFB loop, it will render the presence control inop.. but not sure it would matter that much as it is pretty useless. I placed a .47u Cap in place of the .1u on my presence control and it made a difference, at least you can tell it is actually doing something now. Great work as always Uncle Doug and we learned of yet another 6L6 variant.
@UncleDoug2 жыл бұрын
Good observation about the consequences of turning off the NFB, DL, but really not very noticeable.....as you noted. Thanks so much.
@PCBWay2 жыл бұрын
Nice explanation!👍👍
@UncleDoug2 жыл бұрын
Thanks :)
@frankdiaz58772 жыл бұрын
we know that jack is the real tech hear you never show his paws working on these amps great vid u.d.
@UncleDoug2 жыл бұрын
I had special prosthetic human hands made to fit over his paws, Frank :)
@marksieber81402 жыл бұрын
Thanks UD, again, for an informative and entertaining lesson. I am enjoying your choice of test tunes (as opposed to, say, the test tones.) Cheers, hoping you and your extended species family stay well.
@UncleDoug2 жыл бұрын
Thanks, Mark. Glad the video was appreciated.
@ConspiratorElec2 жыл бұрын
Hey Doug! I always enjoy the videos! I also have a Victoria 35310 (bandmaster clone). I picked mine up from an estate sale for $160 in need of a service. Now it sounds awesome! It’s from 1996.
@UncleDoug2 жыл бұрын
Thanks, Aaron. What a great acquisition !!
@JohnCarey1963Jag2 жыл бұрын
Another enjoyable video - I was worried you were going to actually give up but in the end you found something to change for the better.
@UncleDoug2 жыл бұрын
Thanks, John. Apparently the problem is solved.....the owner is quite pleased.
@fullwaverecked2 жыл бұрын
Great video UD! Well worth the wait. In my version of a perfect world, I would watch Uncle Doug working on a vintage gem every week, amps n hotrods! And Elon Musk would open a vacuum tube factory in Texas... Thanks for doing all you do UD. Best wishes. FW.
@UncleDoug2 жыл бұрын
I wish we had the time and energy to fulfill your dream, FW :) Elon has been hanging out in the workshop lately, pondering the Twitter buy. I'll ask him about some local tube amp factories.
@fullwaverecked2 жыл бұрын
@@UncleDoug Ha! I knew it! Wouldn't take much to retool the back half of the Cool Whip factory just to get some tube production amped up... ;)
@UncleDoug2 жыл бұрын
@@fullwaverecked.....and a nice supply of Cool Whip to boot. Win......win !!
@fullwaverecked2 жыл бұрын
@@UncleDoug That reminds me, I've got to pick some up for dinner. Thanks UD! Cheers!
@motorosso33492 жыл бұрын
Nice video, good playing at the end.
@UncleDoug2 жыл бұрын
Thanks twice, MR.
@bass30032 жыл бұрын
Full credit to you Uncle Doug for the epiphany I had not too long ago drawing a parallel between bypass caps/switch pop caps and condensers in ignition distributor caps.
@UncleDoug2 жыл бұрын
The parallel is a good one, Bass. Glad the video was helpful :)
@VolkswagenVMan2 жыл бұрын
Nice to see you again Uncle Doug!!!!
@UncleDoug2 жыл бұрын
Thanks, VM. It's nice to be seen :)
@djglukbh2 жыл бұрын
5ц3с is 5U4G replacement made in USSR by Svetlana which seems to be a new one (quality control mark is intact and did not degrade after heat). And I can say that this tube is nice because it has black plates inside and it's considered a superior quality in comparison to grey ones by audiophiles. However, as per my experience, these tubes suffer from heater isolation shedding due to age and due to vibrations. So I'd either go with classic 5U4 or use NOS Svetlana 5ц3с because they are more reliable. Sorry if bothering. Cheers, Uncle.
@UncleDoug2 жыл бұрын
No bother at all.....we really appreciate your knowledgeable input.
@raycochrane39712 жыл бұрын
Another satisfying morning viewing. Thanks.
@UncleDoug2 жыл бұрын
Glad to hear it, Ray :)
@peteleoni9665 Жыл бұрын
Uncle D: I think you will find a white noise generator very very helpful.
@UncleDoug10 ай бұрын
I use one to help get to sleep at night :)
@Splattle1012 жыл бұрын
I built a clone of this circuit myself a few years ago. I used Mercury inductors throughout, and I found it hit the bias numbers in the schematic just about exactly. I think I ended up with 410-420 V on the anodes at about -20 V on the grids, and that it was in its happy place there at ~ 60-70% for a pair of 5881s.
@UncleDoug2 жыл бұрын
Sounds like excellent values, BS :)
@jonnybeck67232 жыл бұрын
Food preempts both fool and Ford (which is freakishly gorgeous BTW) ...cripes, that is just the way an ultimate hot rod would be in my own mind's eye 🙈🙉🙊🐵 (4th monkey is obviously 'imagine no evil')
@UncleDoug2 жыл бұрын
Thanks, Jonny :)
@ernestschultz50652 жыл бұрын
A new Uncle Doug video is an event!
@UncleDoug2 жыл бұрын
Hope you like it, Ernest :)
@fisheyelens8762 жыл бұрын
Very thoughtful and professional approach to the conclusion, I was thinking the whole time "why would victoria amps use orange drop signal caps in any fender clone amp they would build?" Victoria amps are normally built with the blue sprague signal caps that the victoria amp company commissioned sprauge to build to match the original fender offerings of the vintage leo fender designs.
@UncleDoug2 жыл бұрын
Thanks for the nice comment and info, FL.
@patchesthejaybird84312 жыл бұрын
This amp was probably built back before Victoria commissioned the blue caps you mentioned. I have a early 90's guitar mag that showcased a couple tweed clones, a Holland, and a Victoria, both used the orange drops as coupling caps back then. In fact, I remember when OD were considered the best coupling cap... I have used several kinds in various builds, and I don't have a preference at this point. I have found that tubes and speakers make the most difference to my ears. That said, I believe I can hear a subtle difference between cap types, but I'm not sure if it's real or not. People argue about this to death. I'll leave it at that.
@UncleDoug2 жыл бұрын
@@patchesthejaybird8431 Thanks for the info, PJ.
@fisheyelens8762 жыл бұрын
@@UncleDoug do you know the year of this amp?
@UncleDoug2 жыл бұрын
@@fisheyelens876 I do not.....Sorry.
@rgbplumbinghilton2 жыл бұрын
Another great vid of a very neatly built amp. Always a pleasure to hear @uncledoug talking his way through it 👍
@UncleDoug2 жыл бұрын
Glad you enjoyed it, Richard.
@bearsbyteme2 жыл бұрын
Mary Jane's Last Dance-sounding great!
@UncleDoug2 жыл бұрын
Thanks, BB :)
@qua77712 жыл бұрын
So Victoria did what Marshall did? Sort of. Amazing troubleshooting. The tubes were a good call. The only other thing I could think of would be a grounding issue in his home's mains, or having it plugged in to the same circuit as a major appliance, like a refrigerator.
@UncleDoug2 жыл бұрын
Good observation, AR. Thanks so much :)
@alvarofalcon71362 жыл бұрын
Hey Uncle Doug you’re sounding good!!
@UncleDoug2 жыл бұрын
Thanks, Alvaro. We're happy just to be still breathing :)
@ix-Xafra2 жыл бұрын
Another great review, Doug. Loved the part about determining the bandwidth of the presence control's effect. I'd love a collage of segments like that. A sort of Best Of Uncle Doug! Like if you agree!
@UncleDoug2 жыл бұрын
Thanks, Vinny. A viewer once tried to create an alphabetized list of topics mixed throughout all the videos.....but gave up. It would be helpful.
@nigman20232 жыл бұрын
Great video uncle Doug I love the mod for the 4 ohm and 8 ohm speaker jack and nfb switch.
@UncleDoug2 жыл бұрын
Thanks, Nigel. Glad to hear it.
@Kilovolver2 жыл бұрын
UD Time! LayZBoys extended and beer is loaded. Thanks for the video again UD! (I really wish they would sell LayZBoys here in Europe)
@UncleDoug2 жыл бұрын
It sounds like you will be ready for our next video, K. Keep the beer and recliner handy......you'll need it.
@BurnleyNuts2 жыл бұрын
Fantastic sounds there from the boys Uncle Doug. Reminds me of early REM tracks. Just superb! Another wonderful vid.
@UncleDoug2 жыл бұрын
Thanks so much, BN. Glad you enjoyed it :)
@BurnleyNuts2 жыл бұрын
@@UncleDoug As always Unc'.
@UncleDoug2 жыл бұрын
@@BurnleyNuts You're the man, BN :)
@mauricerogerson58252 жыл бұрын
Yes, Doug, and if you increase the head room, you have to drive the power tubes harder before they break up. I'd rather have it work like the design originally intended. This is why we mic our amps on stage and in studio, to keep the SPL lower.
@UncleDoug2 жыл бұрын
Thanks for sharing, Maurice.
@russellesimonetta38352 жыл бұрын
Yeah!! I was thinking hook up that 8 ohm tap. The Pro version of that basicily same circuit drove a 15" speaker.
@UncleDoug2 жыл бұрын
Glad we didn't disappoint, Russell.
@radocool12 жыл бұрын
Hello Uncle Doug! I really like your detailed videos. I just wanted to give you a heads up, that one of the channels on your commentary audio might be inverted (180° out of phase with the other). It definitely sounds a bit weird on my speakers.
@UncleDoug2 жыл бұрын
I have no idea how that could happen, Rad, since the commentary comes directly from the video camera microphone(s), with no editing.
@v12dot2 жыл бұрын
What a beautifully wired amp 👌🏻Definitely not built by the hack master next door 😆. Nice work as usual UD .
@UncleDoug2 жыл бұрын
Thanks, Stewart. It really is well done :)
@Nicko30able2 жыл бұрын
That amp is built right...thanks for posting sir! Always appreciate your great attitude and knowledge!
@UncleDoug2 жыл бұрын
Thanks for the input, Nick.
@mauricerogerson58252 жыл бұрын
Uncle Doug, I'd like you to take us through the schematic for that capacitor tester if you have time. Thanks, and keep up the great work!
@UncleDoug2 жыл бұрын
If I can figure it out, I may well do that, Maurice.
@diegorhoenisch622 жыл бұрын
Expertly and gently explained, as always. A small point for the commenters discussing 7581 and 7581A tubes: they are as the numbering suggests, similar. They are not identical however as they have different plate dissipations. Cheers, Alan Tomlinson
@UncleDoug2 жыл бұрын
Thanks so much, Diego. We appreciate the added info.