Secrets of the Fender "Twin-Amp" - Uncovering & Restoring a LOST CIRCUIT!
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- Опубликовано: 7 окт 2020
- In this video, we'll use all our amp archaeology skills to uncover the original LOST CIRCUIT of the early, 1953 tweed Fender "Twin-Amp". The Twin Amp was Leo Fender's first 212 combo, and the first time he'd used separate Bass and Treble controls in a guitar amplifier. It also harbors a secret. The first iteration of these amps had a different tube compliment than the earliest published 5C8 schematic. The 5C8 schematic has a 6J5 tube before the tone stack, while the earlier amps - the first couple hundred perhaps - had all 6SC7 tubes. Without a schematic to go from, we'll have to examine the evidence closely and try to figure out what the original circuit was after decades of services and mods.
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Steel guitarist and electronic guru Freddy Tavaris dropped in to Fender one day to complain about problems with Leo's amp designs. Leo hired him on the spot and he remained his technical right hand man, staying with the company long after the CBS sale. Many amp improvements were made co-incident with Tavaras joining the company. It may be possible that the changes seen in this amp early in its production were done by him. I'll need to check my books to confirm the dates, but its in this general time period. Also, everyone blindly gives credit to Leo for everything related to the company... which is not the way it was. His business manager Forrest was also a brilliant production engineer and totally changed the factory floor layout and materials handling.. as Leo had a freaking mess of a shop with no inventory control. Much of the product design came from George Fullerton and Freddy Tavaris. Leo hired a few great people in key positions that had a major impact on the positive evolution of the company. Sadly, when he sold to CBS, non of the key people were included in any way in the massive profit that Leo took. Forrest in particular had been offered a share of ownership that was never, NEVER, followed through by Leo.
I always suspected Leo Fender could not have pulled it off without unfamed gurus of his day.
didn t know
As it is today, in history we always find very successful and famous people that promised a lot to the real geniuses but never delivered. Have you heard of a “genius“ called Steve Jobs? I bet you did! you’ve heard a lot about him, read the books, watched the movies, listened to the soundtracks, BUT very little was said about the other Steve! Yes! The other one! What is his last name? Oh yes, Wozniak! The one who actually MADE the computers and took a lot of Shit from the so called“genius” during the process.
This is typical of many situations where a name is mentioned while it’s not the one actually doing it. Not saying Leo wasn’t capable of (much better than Jobs), but it would be very noble to mention all the people responsible for the great products and give them what was promised. Very sad to hear that. He was one of my idols from that era and considered him an innovator but never knew he could be that way.
AnticommentWarrior He was tired, and wanted to enjoy some play time.. He took millions, bought a yacht and went boating... He did try at some point to make it up to both Forrest White and George Fullerton by starting small companies with them... The venture with Forrest lasted only a short time, but the other stood the test of time, that being G & L.., George and Leo. G&L still survives as a company, and still has much of the original shop equipment that was once at Fender, all sold when CBS built huge new production facilities. There are youtubes of tours through G&H talking about all the surviving Fender benches, cabinets, and even drawings.
@@roadshowautosports Thomas Edison has to be the ultimate example of this. How many of 'his inventions' were actually invented by him? The more you delve into it, with reliable citations/evidence, the darker it gets, really quite depressing. Arguably his success could be attributed, along with undoubted intellect, more to Machiavellian psychopathy than to genuine genius like Nikola Tesla. For clarity - I don't place Leo Fender in this level of category! As it appears to me, Leo Fender was great &, like most people, part good & part a bit of a sh¡t.
Brad is BACK!!!! Nice to see you working on amps and sounding more like yourself again :) I watched every second of the video, loved it all especially the added history part at the start!
Thanks. I appreciate you watching.
Glad to see him back in 'in the realm' as well..
Dude you are crushing it on the custom intro game
I have some very cool channel fans who made some of those for me. I made a couple on my own too, but theirs are better. :D
Great to see you’re doing a guitar amp centered video again! Btw I’m not here only for the amp content, I do in fact enjoy the majority of your content.
Same here 👍
@@TJHill-fk1cp Same with me
ditto
Thanks for watching the vids. I appreciate it.
I agree, that was the whole reason I came to this channel in the first place. His channel kinda fell off my radar lately so I hope he continues to bring more of this content.
I liked the info in the beginning! you should do that more often
Hey, Brad, thank you for all of your videos. I confess that on the time I’ve first saw your videos i sincerely thought you were an amateur trying it ou things on electronics! I guess by your simple way of talking I couldn’t see the master of this craft that you really are! I’m amazed by the way you can troubleshoot every defect by just simple hints in the circuit! You always start with s simple “I bet...” and your intuition is pretty much on the spot! Sometimes, like in this video, by mentioning possible causes for the humming, you made it look so simple and intuitive while taking away the fear we all have of amplifiers. I didn’t even know one could remove tubes while the amp was ON!!! From there you show such a professionalism and care for the subject as well for its owner when trying to keep it original but functional. Another great quality of yours is how humble you are by not editing so much out of the final product to show how you finally find out what is causing it, your own “mistakes”, and how you got to the solution!
You’re a blessing!
Thank you!
I love how you don't bullshit us. You show the issues you run into even after you have completely serviced it. Thanks for being YOU, Brad!
Now that's an amp! Love the old tube amps of the 50's. Getting rarer than hen's teeth to find! Thanks for sharing this one with us! There's a reason why those are Clapton's favorite!
''How to play every mode ALL AT ONCE and confuse the hell outta people"
that was FUKIN hillarious
I thought someone might get a kick outta that. :D
Man I love watching those 1h+ vids while working on a guitar. Lots of stuff I learn just by listening in sometimes taking a break from guitar and watching the content up close. Very interesting insight on the history and schematics, cant appreciate enough what I learned on your channel.
Hi Brad,
I am a technical officer of 40 years experience. You have noted in other videos that some people have commented on the things you show or not show. I for one appreciate the the need for keeping videos short and or condensed. For me I completely understand and support what you do. I find it informative and entertaining. Please keep up the good work!
Alex
This presentation is over 1 hour and I showed less than half of the repair process. So you get it, I think.
Agree with others... this was a great "new" format IMO for your vids with the informational -> repair -> demo.
Great to see another in depth vintage amp repair vid. Keep them up Brad !
Dude...u still on your own?....if so, best dude decorator I've seen!
Wow, not knowing squat about electronics, this was like all Chinese to me, but this video captivated me from start to finish with the patience & persistence you took tracking down the noise issue. That’s what separates the men from the boys in my opinion. As many times that must have been in for maintenance and buttoned back up without anyone noticing the grounds at the input jacks along with everything else. Amazing, I’m totally blown away, & them some sweet sounding chops to boot. Made my day, thanks.
Brad you knocked this one out of the park. You are back and better than ever. I hope you continue putting out great content like this. We are pulling for you. Good luck.
Great format on this video. I really like the fast-paced history segment with the background music. Great job putting this together, Brad. Thank you!
how can you not love brad,this was great it made me open up my best amp a 1972 guyatone reverb jazz,basically a fender super reverb.and i noticed my tech did what brad did put in great caps and good pots.i love old amps they just do all you need
Great to see you working on amps again Brad! I have missed these videos! 😊🤟🏽 have an amazing day dude!
Fantastic craftsmsnship in this amp and appreciated the deep dive you did in setting up the circuit
Thanks Lance. Glad you dug it.
I wish I had a tenth of the knowledge you have. Great video. I've been watching for a few years and I'm glad you're back doing your thing.
Hi Brad - great to see you back to doing your thing your way!
Ive missed these vids.
Great video, very interesting and informative.
Thank you!!
More to come! Stay tuned.
Another phenomenal video Brad! Thank you for taking the time and effort to produce such quality content, never has it ever not been enjoyable to watch these with my full undivided attention. This definitely takes priority over watching an hour long episode of whatever the heck TV shows you'd find on a streaming service.
That is a glowing compliment, Jonah. I appreciate you saying so.
Great, informative video Brad.. I enjoyed nerding out on this twin..
Back to what you do best Brad. A thourghly watchable and educational video, well done.
Thanks for watching, Martin.
Dead quiet until you blow the windows out with an E chord.
This is one of the best amp projects that you have posted. The history and design era specific sleuthing to resolve the noise issues was so informative. It resolved questions Iv'e had with grounding design at Fender for years. Jennifer's comment is excellent historical input on who influenced the technical show at Fender. More please sir?
I dig the vibe you hit in this video. Nice to see you have your Mojo back! What a great old amp!
Welcome back Brad! This world needs you brother:)
Great to see a classic Brad amp video again!
Brad, you're the man! MVP. Videos like this are "the heart," as they say.
Thanks for watching.
This video made me want to
1. Get myself a Fender amp (never owned one ever)
2. Get back to working on my myriad of unfinished amp and guitar projects
3. Get a Bigsby for my Tele
Stellar video, these are the kinds of videos that made me subscribe years ago. I often watch these while doing fretwork on guitars etc. Keep 'em coming, and thank you for the awesome content!
Excellent video, Brad. I’m glad you’re in a place where you can get top notch videos like this out to us! Great job dude, love it. 2020 has been such a bummer, I know you’re feeling it too and I just want you to know, whatever ideological differences we have, I really, really appreciate your knowledge on the subject of guitar electronics, which has turned out to be one of the most fulfilling parts of my life, thanks, in significant part to you and Uncle Doug for making it feel possible and straightforward. Keep it rockin’ man!
Tommy Miner Right there with ya!
Great job of sleuthing those troubles away! Even though I have been in the electronics game for many moons I continue to learn new stuff from you. Keep it up.
Thanks for the comment. Glad you got something out of it.
Thank you so much for another outstanding video, Brad!
Great great video! Really missed these! Thanks Brad!
Great tutorial on vintage amp repair and troubleshooting, and amazing focus and determination.
You stayed with it until you got it right. Brad is back! and nice tip o the hat to EVH. Thanks
I think like a lot of other people, I've been reconnecting with Van Halen music since his death, and we really lost a luminary of massive importance. That much is clear.
Sweet sounding now i see why die hard electric guitar players love and want these old fender tweed amps. Learned something new today about circuits etc. I do love Hi Fi tube amps it warms up cds and gives life to vinyl! Thank you for posting!
Nice work, Brad. I really like the look of the blue Sozo caps all nicely aligned. Top class, mate.
Nice work Brad, top notch!
Thanks Brad. I really enjoyed the video; lots of great information & history in this one.
Glad you enjoyed it
That's awesome, and a cool coincidence. I recently scored a '57 Twin reissue on Reverb that had some heavy abuse, I've repaired the cabinet and just dropped it off yesterday to amp repair guy. I'm pretty excited to have one again, just a couple years ago I sold a '61 that I grew up with, and I was kind'a missing, even though it was such a beast :0)
Excellent video, Brad! You knocked it out of the park with this one!
I appreciate that! Thanks for saying so.
What a great effin job on this video Brad. Front to back, great stuff. Classic Guitologist. Thank you dude.
Beautiful homage to EVH with 1984 in there. Cool vid and never realised the old Fender twin could get such a gritty sound!! Possibly why Eddie himself used Fender amps back stage in the warm up room!!
I'd forgotten about Eddie using Fenders for that. I think I read that in an old Guitar World interview back in the day?
I wonder if the tech before had stuck the 6SN7 in the mix position of the tone stack with the 50uf bypass cap. The lower mu tube may have allowed the preamp to load more into the tone stack. Interesting to have tried that with the tube complement originally supplied. Lot of work involved there, and time and money. Working on these older is always a challenge considering that Fender prototyped on the fly during this time. He'd loan an amp out, and someone would bring it back with comment, and they'd make a change. Jim Marshall was the same in developing his amps. Artist input was what drove the innovations.
The 6SN7 is a different pinout than the 6SC7, so I don't think they were using it in the tone stack driver position. But yes, the supplied tubes does leave a bit of a mystery... The owner did say when he dropped the amp off that one channel seemed to not be working at all, so I assume that's because there was a 6SC7 in a socket re-wired for a 6SN7. I'm sure the amp would be more flexible with a different tube in the V1 or V2 position so that channel would respond differently, but in this case, I think re-wiring to factory spec was the right move because of the historical interest of the amp.
Brad, you are like the guitar gear whisperer I swear! Fantastic job dude!!👏👏🤘☝ Awesome video and great to see you back digging in an amp as it seems to be your passion. I want to thank you because after stumbling onto your channel a couple years back you really peaked my interest in the electronics side of gear. I'm happy to say as a result I just built my first pedal, a replica of an early Dallas Arbiter Silicon Fuzz Face circuit....and it works!! Lol!! I even built it using some nice transistor sockets so I can swap them out to try different ones easily. Stoked to build another one and even have my eye on an amp kit at the moment. Anyway thanks man, I really appreciate your channel and all you put into it!! Hope you're well and keep up the great work my friend!
Glad to see you back! hope all is going well
My God ,Dude. You are an engineering marvel. I have been sending your vids to my Son ,who is an Engineering major in college. Thank you for all you do !
Great job Brad! Thanks man for the lesson and the 1984 tribute!
Excellent amp demo my friend!!!👊☮❤
Great to see another amp video and this is one is fantastic. Thanks
These are my favorite vids you do,cheers
Nice tribute to Eddy too... and great to see you working on tubes again..
Thanks Brad! This vid was truly entertaining. I was with you the whole time. I was glad when you decided to redo the heater wires and put a virtual tap to ground. I've had to replace jacks on a amp, which had no extra ground lugs. I wish I could show you a picture of the different style jacks I put in. The nuts are wide stainless steel, looks crome plated; decorative. I can't remember the name or where I got the first ones. I think they were given to me to try out. Bit it did make the amp look better and no noise.
Cool. I'd like to see those sometime.
That's a beauty! Well done man!
Good work! The amp sounds great. I can imagine an old-timer blues player kicking back on his porch playing through that amp.
Job well done Brad. Keep up the good work!
Excellent deductions, my dear Jeremy!
Great video Brad. Always a fan of the epic marathon feature length videos.
More to come! I have another epic one in the can I just need to edit.
Very informative video, dude. Kudos on the troubleshooting.
Dude love the history section. You do a great job with it.
Glad you dug it. I'll try to do more in the future like this.
Like the album under the lamp.
I need a transistor for an old alamo amp.can u help me?
Itt 5210
Awesome video, awesome amp, awesome playing. Thanks!
Excellent video Brad for so many reasons... touche
Thanks, Russ! I appreciate you saying so.
I was working on a tweed bassman today. It had the same noise and microphonic issues. I thought about emailing you for a solution, but then I decided to man up. Perhaps subconsciously remembering what caused the noise issue with the non grounded input jacks from this video made the fix quick and easy. It wasn't acting like an asshole because of all of the ways it could, it was behaving exactly as it should with ungrounded multiple inputs.
Nice find on those jacks, Brad! 👍
Sound is great with prs ❤️ amazing job dude !
Hey Brad!!!! I really enjoy your channel, tech chops, and musician chops. According to Aspen Pittman and certain associates of Leo Fender, Leo resisted attempts from his design engineers to stabilize the output of his amplifiers making them more linear and audiophile. Leo knew that his claim to fame was that when his amps were pushed to clipping by musicians of the day they cipped musically and this is what sold Fender amps. The first thing that Leo's design engineers did after the CBS acquisition and Leo's departure was to design Ultra Linear amps to stabilize the output of Fender amps like the silver face Ultra Linear Twin 135 Watt Amp. Leo hated this. Leo loved the fact that his amps clipped musically and was averse to the new 'audiophile' direction that his engineers pursued. JAFWIW
Fantastic segment/topic . Plenty of people on RUclips show and play these thing. Giving us the TONES!!!! And that's all well and good. We all benefit watching those vids. But there's always more to the story. You going through, and giving us the history the way you do, is also just as important to the full story of these amps. Personally: I LOVE THIS SHIT, hahahah. Good to see you digging into your interests a little more. Great stuff, man!! Cheers from Akron, Ohio.
Thanks for that. I'm really glad you enjoyed this one. I put a lot of work into it.
Been watching the SRV aladdins cave vids.I been at this game a long time,lucky enough to meet Jim Brian May etc. But this pair of videos are no 1 to me, you are some player Mr Linzy.Salute
These days, a 1953 Twin would come with its own security guard. Even in that state, that's one highly desirable amp. Great to hear you playing again, too.
Thanks for sticking around. I know this was a long one.
This actual amp grew legs once from Tom Colvin's shop. Thankfully he was able figure out who would have access to get at it pretty quickly.
"Yeah? My amp has protection *and* a driver."
Great video Brad. This was a fun watch.
Thanks Dave. Glad you enjoyed it.
Sounds fantastic.
Good job. It sounds really good.
Great video Brad.
Brad back to fixing old amps, life is good : )
Wow! Set the wayback machine for 1953 Brad, Iv'e been Teleported back! Sounds killer and is dead quiet! Great work!
Welcome BACK!! You rock Brad, great job on this vid, betcha couldnt stop playin' that monster...Such a sweet sounding amp. BTW, I'm going out as a giant Tide Pod for Halloween.
Jeremy Brett ... One of my favorite Sherlock Holmes ... Good vid ''The Old Brad '' ... Welcome back ...
He WAS Holmes. He died playing that part. Pour his soul into it.
Love your content Brad!
Damn bro you do good work! And you play damn good! Great channel man!!
Great video. What a badass amp!
this is why i subscribed..tx Brad!
great job ,keep'em coming n please bring back spf's,take care brother,
Great work on a super cool amp. I bet jumpering the channels would be even more fun!
Good Job looks cleaner Glad you got rid of the OD and IC caps fixed the ground wires
He's BACK!
Your videos are the best.
Love those SoZo Blue caps... great in Fender style amps.
This was my second experience with them in an old Fender. I think they offer a high-end feel to the project. Anyone who opens the back to inspect it should be impressed with the component selection. I think it just shows someone competent cared about it.
That amp with humbuckers whooooo!!!!!! Excellent
Cool you got some staying power to sort that out ...well done
Nice, Brad! Back to why I started watching you :-)
Glad you enjoyed it. I got more in the can I need to edit, so stick around!
@@TheGuitologist Ironically, a buddy of mine has a 1953 Deluxe and was wondering about the large size of the resistors .... are they 1/2w?
Ace video, Brad! 👍🏿
Thanks. I appreciate you watching.
@@TheGuitologist that's OK dude cuz you rock! Very sad is the death of EVH though.
Fantastic video. It's hard to believe that was an hour. Feels like fifteen minutes.
I would love to play one of those amps, I’m a metal guy and can’t play what you play to give it justice. But damn am I jelly. Love these vids bro, thank you again for all the great content.
That amp scream for old good stuff like bb king or Eric clapton, the sound of this is sick good job bro keep doing this I enjoyed all the video
I'm getting a Freddie King vibe from it.
Good to see you back on amps brother. I'm hoping 2021 will see us ALL better and shaking off what can only be described as the bastard of years, 2020. Here for ya any time bro.
Old video but this was really enjoyable to follow along with your troubleshooting. I think ultimately you struck an amazing balance between originality and functionality. Its pretty crazy how we went from this kind of "twin" to the AB763 in just a few years. You'd think it would have been the other way around given what they were doing musically in the 50's. 😁
What a great amp adventure! Wish I could work on apps like I used to. Now I do is work on guitars. Anyway great video Brad
Hey dude. Good to see you.
@@TheGuitologist right back at you Brad. Here in La reporting from the Apocalypse. Still working never get sick. Just have to put up with a bunch of a-holes. So-so average day in La not much has changed.