What impressed my most about this video was how honest you were critiquing yourself. It showed a lot of maturity to say what you did wrong and why. I'm used to watching videos where people edit to boost their ego and you did the opposite by humbly exposing your mistakes.
Definitely one of my bucket list things to do! Just got to get a group of gear nerds like me together who want to join me...possibly around Summer NAMM one year!
Great vid, Phil. It brings back memories of a NAVY class where we given a schematic and a bare chassis to build this super-het receiver. We had to request any part required to build and complete the project and had to identify why this part and it's spec's were required in the particular circuit I was working on. Final test was a hook up to antenna and show that it received over the complete AM band (this was 1964) ! I passed.
From Leo: 1969 my high school electronics teacher was ex Navy. He had us build those bare chassis tube radios. A few of us that finished them and we listened to the radio during class. I had already built a couple of Heath Kit and Knight kit amplifiers and radios so it was fun. I wish we were allowed to keep them. We had to strip them back down and turn in the parts for the next semester class.
AJ and Steve are the Tweed masters, know exactly what needs to happen and when. They really command the class and have much respect for the attendees and want to really respect vintage amps as "American history and we do it better than anyone anywhere".
I check all my solder joints as I do them, then I paint them with a red marker for the hot wires, and green for the grounds, and check continuity after each joints are solder and use shrink wrap on every exposed wire. My first build was a Marshall 2204 and it's a hard one to start with, but I learned every part of a amp from the input through the coupling caps and the tonestack, through the phase inverter, to the power supply, cathode biased or negative bias, I can build without a schematic if I had to. I have built 2 Marshall clones, a Tweed fender clone, and repaired many amps, and in less then a year. If I'm going to play through tubes amps I wanted to know how to fix them. So I studied them then built them. I like old tube radios also, I got a cool shortwave from the 40s I recapped and i can get stations from all over the world.
@Thomas Pelley thanks I love gear, any gear, guitars, pedals and amps, I chased a certain tone for so long now I build everything till I found it, I wind my own pickups, build guitars and amps, I build a tele recently and fabricated everything but the tuners.
I recently went to this class at Sweetwater based on this video The guys from Mojotone were awesome, helpful, and patient. The amp sounds great. I learned a lot.
I built a 5F1 Champ clone kit from Tube Depot. I also made a few minor mistakes but figured it out and got it working. Lots of fun and it's amazing how great these simple early circuits sound. Sometimes simpler is better.
Thinking about doing this amp. I have done smaller projects in electronics class in HS and my field was telecomm switching. Have done miles of soldering but next to nothing with tubes. We had a class on them but that was circa 63-64’. Caps were one of the danger zones, I do remember that lol. Thanks for posting and issues you had. My sir name is Swift and the crest motto is Festina Lente. Make haste slowly or with caution take your pick. Seems to apply here.
Awesome amp! I like the honesty about the mistakes you made. We all make them, but most of us have a difficult time admitting to them. If we don’t admit our mistakes, nobody learns from them.
This looks like tons of fun! Wish there was a class like this near me. I’ve build a few small 5 watt amps and modded some as well. I like doing things myself. I’m typically a metal guy but I’m really digging the tones of this amp. Nice video!
This is a great class I have heard. Being that I use to build, repair, and modify amps the class would not be for me. But for someone who wants to learn, I can’t think of a better platform than the old narrow panel tweed deluxe. A classic amp for sure and when you are finished there is a huge element of pride and enjoyment that comes from a DIY project like this. I really enjoyed the video Phillip and look forward to the videos to follow this project. I really wish I could still get my hands dirty but do to complications due to a spinal cord injury I had to give up being an amp tech. I do not miss working on Ampeg SVT’s though. Keep up the great videos.
Building amps is almost as fun as playing them. This year I built a brownface-ish amp for under $150 utilizing the chassis and transformers from an old PA amp from 1960. True point to point circuitry (no turret boards), dead silent, and it sounds just as good as any high dollar amp with similar circuitry. A handful of years ago when I was 15 or 16, I was in need of a good amp after my Mustang died, but was pretty broke, so I bought a PA amp from 59, the same model I was lucky to find another of this year. Basically learned everything on that amp, tuned it and worked on it more than I played it, but damn if it didn't sound good. Ended up being a pretty custom circuit, but my grandfather who has played since the 60s claimed it is one of the best amps he's ever heard. Had previous experience in electronics though, which helps. I had built pedals for the same reason: I wanted a big muff for $25!
I will be building one of these as a project for my electrical engineering degree. I expect that it will be quite easy, but I'd take the class if I had the option. Thanks for the upload Phil.
Doing one of these next year. The biggest benefit I have gotten from going to the classes even if I know about the subject is that I will learn something knew or learn how I was doing something wrong.
Excellent video, seems like a great value and a good supervised experience for anybody wanting to learn the ins/outs of amplifier repair or modifications.
I’m about to start my build of the Mojo Tone NC 3015. Thanks for the boost I got from hearing you say I can do it😂….I may be over-confident, but….here goes.
Mojo Tone built all my cabs and I've been a customer for years. I looked at the amp kits when they introduced them, but I don't think I have the patience to build one. So far I've had very good luck with my very old amps. 8)
Great video Phil! I would like to see more stuff on building amps. I built the ModKitsDIY 102+ (8W tube amp) and had several problems before I got it to work. Even though I am an experienced solderer, the cramped space caused me to burn up a capacitor and also have a bad solder joint. Diagnosing the problems was the hard part in building the kit. I would like to try the Mojo one you built. Thanks for sharing your experience!
I would definitely take the class if it were near me. Though I have years of commercial soldering experience I don't think I'd like to build one from a kit the first time. A little inattention to detail can be costly or dangerous so I'd like to have someone with experience teaching me the first time. But I look forward to your video on the at-home kit and may change my mind.
Only just seen this video Phil some great advice here man as I've just ordered a delux from stewmac to do on my own i don't really solder anything apart from the odd guitar pick up or jack so this will 100% be a challenge to say the least but i am looking forward to it, gonna go watch your other vid on the self build if i can find it and see if i can get some more info and also some of the uncle doug videos as i hear hes great wish me luck plz
Even though I have built a Marshall JTM 45 clone from mojotone, fixed complex tube circuitry for years like tube color televisions, high gain modern amps and tons of test equipment I would still take this class because I’m self taught and it would be cool to see somebody critique my work aswell as see how other people operate. I might learn some things who knows. I’m able to track down problems very well but I always feel like there’s more to learn in this field.
I've built about 20 amps over the years as a hobby. The first was from a kit. The kit maker was new to providing kits, and he talked me through the build by phone. He answered lots of questions about safety, wire locations, etc. That advice is VERY important when you are new to building amps, so I would say that some sort of a class is a good thing. (I've never seen a build manual detailed enough to make the class unnecessary). And it's always good to start with a smaller simple amp like a 5E3. I've known people who tried building a Marshall as their first build, and they failed miserably (too complex, too many places to make mistakes). Even after 20 builds, I still don't know how to find and kill an oscillation efficiently. Wish I did ...
Check out StewMac kits, you can see their instruction manuals online. I built a Marshall 45W on my first try and the instructions were extremely detailed.
Class here. As you said, it's the interaction and community that makes something like this fun. I'm an EE and even Pace micro miniature certified and could throw something like this together from scratch with no problems (especially with their excellent "paint by numbers" manual), but where's the fun in that ⚡️🔥
I have built a few amps and the testing part is really important. Check grounding at all points. Pay attention to whiskers when you strip wires. It is very easy to get these when soldering the preamp tubesockets. There are many videos on building amps, so look at a few and I bet you will have no problems building your own amp.
I just bought the mojotone tweed vibrolux. even though I've soldered before, I hate doing it. and since having the end product is more important than the process....I paid a friend to solder it for me
Built an Ampmaker Double-6, it sounds wonderful (well I would say that). I would say build a kit it's an achievement, just take your time. I'm now looking for another kit to build, wife says it'll keep me out of trouble for a while.
Electronics has always excited me & I e always been enthused over it, I'd love to take the class but I'm one of those super super super low income people so probably independent but I'd love to learn. It would probably be the highlight of my year as well if not my whole last decade
Don't feel too bad about the extra wire thing. That amp particularly is notorious for being susceptible to that issue. Fender even had issues with in on the production line for the same reason or so the story goes. I remember seeing that story so many times when researching the 5E3 when I was going to build an amp the first time.
I’ve built the 5F1 and 5E3 .. Mojotone makes it easy 😁. However, I’ve built my own 3/4” pine cabinets and I wish there were more instruction on how to apply tweed .. I.e., glueing process 😬
Thank you for the video, as always an excellent job! Wish you had more information about how you fixed the problem when the class was over. Since I am disabled I can't come to a class. The cost $1000, would that be close to buying an amp like this? Are the directions good enough that a handy person could do this kit at home?
Looks really interesting. The class itself isn't an option for me since I don't live in the US. The thing stopping me from trying one of these types of kits is that I know nothing about electronics and when I did inevitably make a mistake I'd be left with 750 bucks worth of amp pieces and no way to troubleshoot my mistakes. Instruction manuals are fine until something goes wrong and you rely on an expert to fix it (as happened in the video to Phil). Email support might fix it but it just as easily might not. So for me as much as I'd like to try this I can't justify the cost for something that in all probability is going to sit broken and unfinished.
You dont need a class, just do it. Mojotone instructions are super easy. If anything goes wrong, google "tube amp repair" in your area. There's always a guy. I built a Mojotone Champ and Trinity TMB.
Can u make other styles of amp, or only the tweed circuit? Not much of a tweed guy but would love to build a simple Marshall circuit perhaps. Maybe a Friedman PT-20 clone would be awesome.
Who or where can i get some drawings for a hand wired 5 watt valve amplifier, also where to get the parts from, please mate if you get the time to reply.
I have no issue with building an amp kit myself, but it something doesn't work at the end of the build, I would have no idea how to trouble shoot. Bad solder joint? Incorrect connection? Faulty component?
Classes are cool, but you can also get some soldering skills, read up on amp building and electronics, and just go for it. Tweed amps in particular are easy builds, and getting stumped and troubleshooting, as mind numbing as it is when you're new, will prepare you for future builds if you intend to do it more than once.
What impressed my most about this video was how honest you were critiquing yourself. It showed a lot of maturity to say what you did wrong and why. I'm used to watching videos where people edit to boost their ego and you did the opposite by humbly exposing your mistakes.
Just got done with mine, what a great experience!
Definitely one of my bucket list things to do! Just got to get a group of gear nerds like me together who want to join me...possibly around Summer NAMM one year!
R.J. Ronquillo where is it offered???
Great vid, Phil. It brings back memories of a NAVY class where we given a schematic and a bare chassis to build this super-het receiver. We had to request any part required to build and complete the project and had to identify why this part and it's spec's were required in the particular circuit I was working on. Final test was a hook up to antenna and show that it received over the complete AM band (this was 1964) ! I passed.
From Leo: 1969 my high school electronics teacher was ex Navy. He had us build those bare chassis tube radios. A few of us that finished them and we listened to the radio during class. I had already built a couple of Heath Kit and Knight kit amplifiers and radios so it was fun. I wish we were allowed to keep them. We had to strip them back down and turn in the parts for the next semester class.
No wonder my dad is a nut with electronics navy trained
It was great meeting you at the class, I enjoyed hanging out afterwards as well. I loved the class, A.J. and Steve were great!!
I know absolutely nothing about electronics but amp building is something I've become very interested in and I'd like to try it at some point.
Took the workshop this weekend - Andy and Steve from MOJO are awesome - Zach from Carter's is great - the amp sounds awesome!!
Did you fly or drive to get there? Wonder if they'll ship your finished amp back to you...would hate to have to check it on a plane coming home.
David McKnight I live only 20 miles from the location, so I drove of course
I love that they had practice boards, so dopes like me don’t mess up the expensive stuff.
I took this class, I highly recommend it. I had a great time and ended up with a great amp.
@J A I do like the amp. I can't say for 100% sure but the kits look exactly the same.
AJ and Steve are the Tweed masters, know exactly what needs to happen and when. They really command the class and have much respect for the attendees and want to really respect vintage amps as "American history and we do it better than anyone anywhere".
I check all my solder joints as I do them, then I paint them with a red marker for the hot wires, and green for the grounds, and check continuity after each joints are solder and use shrink wrap on every exposed wire. My first build was a Marshall 2204 and it's a hard one to start with, but I learned every part of a amp from the input through the coupling caps and the tonestack, through the phase inverter, to the power supply, cathode biased or negative bias, I can build without a schematic if I had to. I have built 2 Marshall clones, a Tweed fender clone, and repaired many amps, and in less then a year. If I'm going to play through tubes amps I wanted to know how to fix them. So I studied them then built them. I like old tube radios also, I got a cool shortwave from the 40s I recapped and i can get stations from all over the world.
@Thomas Pelley thanks I love gear, any gear, guitars, pedals and amps, I chased a certain tone for so long now I build everything till I found it, I wind my own pickups, build guitars and amps, I build a tele recently and fabricated everything but the tuners.
Truly inspiring. Can't wait to get a chance to watch your amp building video. Would to build a British sounding single channel chimy sounding head.
That would be so much fun. Made me think about when my dad built a heathkit stereo back in the early 80s
I recently went to this class at Sweetwater based on this video The guys from Mojotone were awesome, helpful, and patient. The amp sounds great. I learned a lot.
Sounds like hank hill moved on to amp building. Love it, makes me wanna do it more
I built a 5F1 Champ clone kit from Tube Depot. I also made a few minor mistakes but figured it out and got it working. Lots of fun and it's amazing how great these simple early circuits sound. Sometimes simpler is better.
Thats a great video! Cheers from Germany. Stumbled in here because im thinkin about building my first kit ...
The class was a blast, I would do it again in a heartbeat.
That sounded incredible! I hope to take on a project or class like this at some time in the future. Thanks Phil that was another fun video.
Thinking about doing this amp. I have done smaller projects in electronics class in HS and my field was telecomm switching. Have done miles of soldering but next to nothing with tubes. We had a class on them but that was circa 63-64’. Caps were one of the danger zones, I do remember that lol. Thanks for posting and issues you had. My sir name is Swift and the crest motto is Festina Lente. Make haste slowly or with caution take your pick. Seems to apply here.
Awesome amp! I like the honesty about the mistakes you made. We all make them, but most of us have a difficult time admitting to them. If we don’t admit our mistakes, nobody learns from them.
It could be cool to learn some "mods" for that mojo amp. Would you do a video regarding such topic?
This looks like tons of fun! Wish there was a class like this near me. I’ve build a few small 5 watt amps and modded some as well. I like doing things myself. I’m typically a metal guy but I’m really digging the tones of this amp. Nice video!
This is a great class I have heard. Being that I use to build, repair, and modify amps the class would not be for me. But for someone who wants to learn, I can’t think of a better platform than the old narrow panel tweed deluxe. A classic amp for sure and when you are finished there is a huge element of pride and enjoyment that comes from a DIY project like this. I really enjoyed the video Phillip and look forward to the videos to follow this project. I really wish I could still get my hands dirty but do to complications due to a spinal cord injury I had to give up being an amp tech. I do not miss working on Ampeg SVT’s though. Keep up the great videos.
Building amps is almost as fun as playing them.
This year I built a brownface-ish amp for under $150 utilizing the chassis and transformers from an old PA amp from 1960. True point to point circuitry (no turret boards), dead silent, and it sounds just as good as any high dollar amp with similar circuitry. A handful of years ago when I was 15 or 16, I was in need of a good amp after my Mustang died, but was pretty broke, so I bought a PA amp from 59, the same model I was lucky to find another of this year. Basically learned everything on that amp, tuned it and worked on it more than I played it, but damn if it didn't sound good. Ended up being a pretty custom circuit, but my grandfather who has played since the 60s claimed it is one of the best amps he's ever heard.
Had previous experience in electronics though, which helps. I had built pedals for the same reason: I wanted a big muff for $25!
I will be building one of these as a project for my electrical engineering degree. I expect that it will be quite easy, but I'd take the class if I had the option. Thanks for the upload Phil.
I haven't tried to solder anything yet, but I think this would really be a fun and cool class! Thanks for the insights Phil!
Doing one of these next year. The biggest benefit I have gotten from going to the classes even if I know about the subject is that I will learn something knew or learn how I was doing something wrong.
Excellent video, seems like a great value and a good supervised experience for anybody wanting to learn the ins/outs of amplifier repair or modifications.
Bruce Egnator does a build class for a Marshall 20watt amp head in SE Michigan a couple times a year. Pretty cool stuff!
I’m about to start my build of the Mojo Tone NC 3015. Thanks for the boost I got from hearing you say
I can do it😂….I may be over-confident, but….here goes.
Mojo Tone built all my cabs and I've been a customer for years. I looked at the amp kits when they introduced them, but I don't think I have the patience to build one. So far I've had very good luck with my very old amps. 8)
Great video Phil! I would like to see more stuff on building amps. I built the ModKitsDIY 102+ (8W tube amp) and had several problems before I got it to work. Even though I am an experienced solderer, the cramped space caused me to burn up a capacitor and also have a bad solder joint. Diagnosing the problems was the hard part in building the kit. I would like to try the Mojo one you built. Thanks for sharing your experience!
The class seemed awesome!
I would definitely take the class if it were near me. Though I have years of commercial soldering experience I don't think I'd like to build one from a kit the first time. A little inattention to detail can be costly or dangerous so I'd like to have someone with experience teaching me the first time. But I look forward to your video on the at-home kit and may change my mind.
Great video on Mojo build @ factory - looking for video on home build amp!
Very helpful, appreciate you being transparent, I would take the class with instruction :)
this is a great idea and i hope their business prospers! i'd rather have a personal connection to my gear than buy it off the shelf, given the chance.
A thousand bucks for that kind of experience sounds like a steal. Build your own amp, understand, probably make a friend? Super cool.
Only just seen this video Phil some great advice here man as I've just ordered a delux from stewmac to do on my own i don't really solder anything apart from the odd guitar pick up or jack so this will 100% be a challenge to say the least but i am looking forward to it, gonna go watch your other vid on the self build if i can find it and see if i can get some more info and also some of the uncle doug videos as i hear hes great wish me luck plz
Absolutely independently and taking my time to have the best clean build possible.
Even though I have built a Marshall JTM 45 clone from mojotone, fixed complex tube circuitry for years like tube color televisions, high gain modern amps and tons of test equipment I would still take this class because I’m self taught and it would be cool to see somebody critique my work aswell as see how other people operate. I might learn some things who knows. I’m able to track down problems very well but I always feel like there’s more to learn in this field.
Sound good ,Thank for sharing and have a nice evening.
I would love a course like this, what a brilliant class I did electronics in school many moons ago at a Tech level but never worked in the business,
Phil, liked the opening graphics! Very nice opening AND ending graphics!
Sounds great!
Awesome video Phil, thanks for making unique content!
I've built about 20 amps over the years as a hobby. The first was from a kit. The kit maker was new to providing kits, and he talked me through the build by phone. He answered lots of questions about safety, wire locations, etc. That advice is VERY important when you are new to building amps, so I would say that some sort of a class is a good thing. (I've never seen a build manual detailed enough to make the class unnecessary). And it's always good to start with a smaller simple amp like a 5E3. I've known people who tried building a Marshall as their first build, and they failed miserably (too complex, too many places to make mistakes). Even after 20 builds, I still don't know how to find and kill an oscillation efficiently. Wish I did ...
Check out StewMac kits, you can see their instruction manuals online. I built a Marshall 45W on my first try and the instructions were extremely detailed.
The printed instructions look really good for the DIY guys who can't attend a class.
That's so cool, Phil.
Great sounding amp . ..seems very versatile .
Built two of these, great fun and a killer amp.
Cool video Phil! I would like to do an amp build some time. I agree, the community aspect of taking a class is always a lot of fun!
Do they ever do these classes in different city’s ? Like would they come to New England
Great video 👍 I totally would love to take a class like that for sure.
Class here. As you said, it's the interaction and community that makes something like this fun. I'm an EE and even Pace micro miniature certified and could throw something like this together from scratch with no problems (especially with their excellent "paint by numbers" manual), but where's the fun in that ⚡️🔥
One of my friends build mojo amps and loves it.
Congratulations Phil on not having to post an Obituary video ! Lol
Thank you for sharing !
I have built a few amps and the testing part is really important. Check grounding at all points. Pay attention to whiskers when you strip wires. It is very easy to get these when soldering the preamp tubesockets. There are many videos on building amps, so look at a few and I bet you will have no problems building your own amp.
Looks great.
Definitely wanna go to this class. Hopefully they do one in AZ again
You’re strat and G&L sounds great!!
I just bought the mojotone tweed vibrolux. even though I've soldered before, I hate doing it.
and since having the end product is more important than the process....I paid a friend to solder it for me
Built an Ampmaker Double-6, it sounds wonderful (well I would say that). I would say build a kit it's an achievement, just take your time. I'm now looking for another kit to build, wife says it'll keep me out of trouble for a while.
That amp sounds so nice. Could you make a review/demo of the amp please,Phil.
The twisting of wires/cables carrying an oscillation wave is very important.
Busting to do one
Does anyone have a link for the course? Seems like a blast!
Electronics has always excited me & I e always been enthused over it, I'd love to take the class but I'm one of those super super super low income people so probably independent but I'd love to learn. It would probably be the highlight of my year as well if not my whole last decade
How do I find out about these classes?
Don't feel too bad about the extra wire thing. That amp particularly is notorious for being susceptible to that issue. Fender even had issues with in on the production line for the same reason or so the story goes. I remember seeing that story so many times when researching the 5E3 when I was going to build an amp the first time.
End result sounds great..
Phil great video. That would be so much fun and really not out of the way expensive. Looking forward to the next video. Love your channel buddy.
I’ve built the 5F1 and 5E3 .. Mojotone makes it easy 😁. However, I’ve built my own 3/4” pine cabinets and I wish there were more instruction on how to apply tweed .. I.e., glueing process 😬
I would love to take this class. Also would like to build by the book if I couldn't work out the class.
Thank you for the video, as always an excellent job! Wish you had more information about how you fixed the problem when the class was over. Since I am disabled I can't come to a class. The cost $1000, would that be close to buying an amp like this? Are the directions good enough that a handy person could do this kit at home?
Looks really interesting. The class itself isn't an option for me since I don't live in the US. The thing stopping me from trying one of these types of kits is that I know nothing about electronics and when I did inevitably make a mistake I'd be left with 750 bucks worth of amp pieces and no way to troubleshoot my mistakes. Instruction manuals are fine until something goes wrong and you rely on an expert to fix it (as happened in the video to Phil). Email support might fix it but it just as easily might not. So for me as much as I'd like to try this I can't justify the cost for something that in all probability is going to sit broken and unfinished.
You dont need a class, just do it. Mojotone instructions are super easy. If anything goes wrong, google "tube amp repair" in your area. There's always a guy. I built a Mojotone Champ and Trinity TMB.
Sounds like you had fun AND an education!
Really good video!
Damn I bet that class was awesome. I’d love to build an amp
I want to go to this class.
Can u make other styles of amp, or only the tweed circuit? Not much of a tweed guy but would love to build a simple Marshall circuit perhaps. Maybe a Friedman PT-20 clone would be awesome.
Did you use the Jensen speaker, or opt for installing another speaker, like a Celestion?
Have a link to the video of the build you did on your own?
I would love to take the class if they offered it near Buffalo NY.
What model of orange caps are you using. I love the size of those. Are they the Sprague Orange Drop 6PS???
Awesome...how did you fix the amp Phillip??? did you fix it at home? thanks
A Stewmac 15W tweed kit popped in my feed, prior to watching this. Phil you have any plays on doing one of the Stewmacs?
I would really love to take the class. Dream come true.
I've been really thinking about buying one of these.
How often to you play this Mojo amp now?
Who or where can i get some drawings for a hand wired 5 watt valve amplifier, also where to get the parts from, please mate if you get the time to reply.
Absolutely would do the class!!
I have no issue with building an amp kit myself, but it something doesn't work at the end of the build, I would have no idea how to trouble shoot. Bad solder joint? Incorrect connection? Faulty component?
Have you already completed the StewMac amp build you were talking earlier this year?
Last time I was this early Phil still had hair
Great content Phil, thank you.
I love the Ordnance Corps sticker you put on your OD green guitar behind you!
Is there something like this in the UK?
I really want to make the jcm 800 kit that mojo tone have
I would love to take the class, where do i find them?
Go to Monotone.com and you can find them posted or sign up for their emails and they'll let you know when new ones are scheduled.
www.mojotone.com/ It seems there are no workshops scheduled for now. Join their mailing list.
Classes are cool, but you can also get some soldering skills, read up on amp building and electronics, and just go for it. Tweed amps in particular are easy builds, and getting stumped and troubleshooting, as mind numbing as it is when you're new, will prepare you for future builds if you intend to do it more than once.