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DIY_AudioGarage
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Registrace 13. 01. 2024
Welcome to DIY_AudioGarage! 🎸 Dive into my journey of DIY guitar amp projects where passion for music meets hands-on crafting. From building Marshall JCM 800 clones to custom mods, this channel is a playground for amp enthusiasts.
🔧 About the Channel:
Explore the captivating world of amp building and mods. I share my experiences, trials, and the sweet sound of success (or interesting learning curves!). It's all about the thrill of creating something unique and the love for guitar tones.
⚠️ Disclaimer: I'm not an expert, just a hobbyist with a passion for amps. This channel is for entertainment purposes only, not professional advice. Join me for a fun ride into the world of DIY audio - no teaching, just sharing and enjoying the journey.
👍 Stay Tuned:
Subscribe for a mix of projects, gear talk, and a glimpse into the DIY audio world. Let's enjoy the art of amp building together!
🔧 About the Channel:
Explore the captivating world of amp building and mods. I share my experiences, trials, and the sweet sound of success (or interesting learning curves!). It's all about the thrill of creating something unique and the love for guitar tones.
⚠️ Disclaimer: I'm not an expert, just a hobbyist with a passion for amps. This channel is for entertainment purposes only, not professional advice. Join me for a fun ride into the world of DIY audio - no teaching, just sharing and enjoying the journey.
👍 Stay Tuned:
Subscribe for a mix of projects, gear talk, and a glimpse into the DIY audio world. Let's enjoy the art of amp building together!
Quick Guide: Troubleshooting & Biasing DSL 40CR Amp
Multimeter I use:
-Neoteck True RMS 9999: amzn.to/4aoUcI2 (Amazon)
Bias calculator: robrobinette.com/Tube_Bias_Calculator.htm
In this video, we'll show you how to troubleshoot and bias a DSL 40CR amp. If you're having issues with your amp or need to adjust the bias, this guide will help you get your amp running smoothly again.
Contact info:
diyaudiogarage@gmail.com
diyaudiogarage
Disclamer:
Please note that this video is for informational and entertainment purposes only. I am not a professional or certified expert in amplifier modifications or electronics.
The amplifier I'm working on in this video operates at high voltages, which can be extremely dangerous and pose a risk of serious injury or even death. This video is not intended to be a tutorial or guide. If you choose to modify your amplifier or engage in similar activities, you do so at your own risk.
I am not responsible for any damage to equipment, property, or any injury sustained as a result of attempting to replicate what is shown in this video. Always prioritize safety and, if in doubt, consult or hire a professional with the necessary experience and qualifications to carry out these types of modifications and repairs safely.
-Neoteck True RMS 9999: amzn.to/4aoUcI2 (Amazon)
Bias calculator: robrobinette.com/Tube_Bias_Calculator.htm
In this video, we'll show you how to troubleshoot and bias a DSL 40CR amp. If you're having issues with your amp or need to adjust the bias, this guide will help you get your amp running smoothly again.
Contact info:
diyaudiogarage@gmail.com
diyaudiogarage
Disclamer:
Please note that this video is for informational and entertainment purposes only. I am not a professional or certified expert in amplifier modifications or electronics.
The amplifier I'm working on in this video operates at high voltages, which can be extremely dangerous and pose a risk of serious injury or even death. This video is not intended to be a tutorial or guide. If you choose to modify your amplifier or engage in similar activities, you do so at your own risk.
I am not responsible for any damage to equipment, property, or any injury sustained as a result of attempting to replicate what is shown in this video. Always prioritize safety and, if in doubt, consult or hire a professional with the necessary experience and qualifications to carry out these types of modifications and repairs safely.
zhlédnutí: 237
Video
Building the Mojotone Super Lead 100W Amp - Timelapse and Sound Demo
zhlédnutí 855Před 3 měsíci
Join me as I document the exciting process of assembling the Mojotone Super Lead 100W amplifier from start to finish. This powerful tube amp is a modern recreation of the iconic 1960s British amplifiers used by some of the greatest guitar heroes of all time. Support the channel using affiliate links below! Gear affiliate links: -Wireless Guitar System 5.8 Wireless Guitar Transmitter - amzn.to/3...
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zhlédnutí 238Před 5 měsíci
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zhlédnutí 982Před 5 měsíci
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zhlédnutí 608Před 5 měsíci
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zhlédnutí 425Před 5 měsíci
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zhlédnutí 850Před 6 měsíci
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zhlédnutí 675Před 6 měsíci
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Good call on using one of the output jack spots for the PPIMV pot..
I'm glad you got it working.
Great they put a turret board 👍 I built a TAD Princeton reverb kit years ago. The board was with eyelet. Now everything is bent and warped with heat and humidity. I have to rebuild it wit turret.
Awesome! Glad they still make these. Been wanting one for last year or so. Now I'm ready to order. 👍
Do they do a 100 watt version?
Both transformer orientation on the chassis, is wrong
Thanks for checking out my video! According to the diagram provided by MOJOTONE, I installed the transformers correctly.
@@DIY_AudioGarage Yeah, their instruction have you install them that way, which is different than the correct way so to be different than the original, so Marshall doesn't come after them. But, it is still incorrect.
@@conjering Thank you for the information! I was not aware of the diffrence.
@@conjering Hello, would i get a JTM blackflag sound if i install the transformer correctly?
@@quinta3389 Hahahahahaha
Sounds Good and i do have some advice since i just built a similar amplifier. There are some different ways to do this and remove noise. The easiest way is to use shielded wire. Jason from Headfirst recommends using shielded wire in any "high gain amp" and with the no.36 sir mod you turned the jcm800 into a high gain amplifier. I recently did the same and shielded the entire amp and it sucked. too much "tone suck" and honestly RG174 is too thin and cant handle the voltages and signal correctly. it basically burned up every coax like a filament in some spots, like a fuse. i recommend using mil spec 27500 aircraft wire. i used the 22 awg wire and its great because there is no impedance so you dont lose any treble or high frequencies. i also recommend using a hot shield. If you use a very good 8 inch Hot shield then you are Golden. I used one but it was too long. around 15 inches since i went around the board instead of under the board. some fixes will reduce hum, hizz or buzz but almost all will take a bit of treble away. You can use a capacitor of 100pF or more across the Anode Plate resistor of 100k. But do not use 470k if the anode feeds into the coupling cap followed by a 470k/470pF. That will cause some weird things to happen, in that case you have to use a smaller value. The first gain is the most important and the quietest way to quiet the amp is the miller effect. that means using a hot shield or a 10pF capacitor from the anode to the plate. The recommended value is 7.5pF from factory. But capacitors fail and may cause either a short or an open break. a short is very bad which is why i recommend a 10pF in the mixing stage. The Triode with a cathode of 820ohm and 680nF you can use the miller effect to remove the hum. If you look at the AFD100 schematic they used a 1nF capacitor across the 100k resistor at the triode with the 820ohm/680nf stage too. the DSL 100 uses a 1nF to ground from the anode of that same gain stage as well. Mesa boogie also uses 120pF capacitors across both the 82k and 100k in the Phase inverter. You have to be careful that if you use any shielded wire that you do not create any ground loops. you definitely have to do something about your ground loop hum. i recommend removing every chassis connection connected to ground. you should only have one place where all the grounds connect to the chassis. at least for the preamp section, not the power tubes but it does help if you do that with the power tubes too. my first attempt at building my amp was pretty good but i made so many problems with the ground. i read some tec hnical document on grounding which helped a lot. grounding an amp is almost an art form
Amp sounds great
Great build, the only thing I would've done differently is when you're soldering wires to any tag with an eyelet hole, you should always pass the wire through the hole, then solder it. Tack soldering to the surface of the tag will work ok, but if you have any solder joints where the solder hasn't flowed well, the wire can easily come off and if it's a critical wire (power, speaker out. etc) you could end up with a big problem.
Thank you for the feedback! I appreciate the tip. That makes a lot of sense and definitely sounds more secure. I'll make sure to incorporate that technique in future projects to ensure better solder joints, especially for critical connections. Thanks again for sharing your knowledge!
Hi there. Let me give you a tip. Next time go with the back side jumper cables. Do not get me wrong it is not more noisy or worse going the top side. Electrically it does not matter. But it is easier for you and it makes things look way cleaner. If you look at the original Fender amplifiers with the eyelet boards and Marshall amplifiers with the turret boards you will see that they always go with the jumper cables on the bottom side. Turret has 3 places that you can use to connect things to it. Bottom on the top and on the bottom as well as the barrel. Actually it is possible to connect two parts to a barrel but that does not matter. You can use any of those places to connect what you need to connect to them. So hole on the bottom side is legal connection point as well. What makes the difference is that when you connect jumper cables on the bottom side you leave more space to connect the other parts to that turret. It is easier to make and looks cleaner afterwards. Now most of the times those jumping cables are diverse stages of the B plus. So they do carry high DC voltage so you want to be sure they will not de-solder and touch the chassis. Thing with building amplifiers is that in the beginning it is easy to make things look neat. But with every single compromise it starts looking less neat very fast. There are so many wires and parts that it quickly can start looking like a birds nest. Sometimes you can't do to much. But if you make sure that every stepp is looking neat and make sure that next thing is looking neat will bring you to a point where all amplifier looks neat. When you build first amplifiers you have to make sure every soldering connection is bulletproof. You want to have good mechanical connection so that solder tin is not a glue holding it together. Soldering tin is not providing the mechanical support. Better said it should not be providing the mechanical support. This priority leaves looks as second or totally non important thing. Though neat layout and short as possible wires do make difference. Not only that it looks better but overall there is less length of wires to act as antenna. Those are just last few percent of lower noise floor but it makes some difference. Some wires must have some length reserve or you will not be able to lift a board. But you want to prevent un necessary lengths of wire. Every following amplifier is easier to make and will look neater. Enjoy building them.
Thank you for the detailed advice! I really appreciate the tips on using the backside for jumper cables to keep things neat and organized. I'll definitely consider this approach for future builds. Your insights on the importance of mechanical connections and keeping wires short are also very helpful. It's great to learn from experienced builders like you. Thanks again for sharing your knowledge!
Great video brother I really enjoyed! I always wanted to build this amp but every time I look it up to purchase it’s always out out stock… This time it was actually available so I went and purchased because ur video inspired me!!! Please put a up a full rebuild so I have some references for my build!!! Keep up the great posts🤘🏽🎸#oyeahgottaloveit
Thanks so much for the kind words! I'm thrilled to hear that my video inspired you to finally purchase the amp. Congratulations on getting your hands on it! Happy building! Your support means a lot. Keep enjoying the journey
Somehow today CZcams decided to offer me many how I build my amplifier videos. Your video is actually what average Joe gets when building such project. You are down to earth, admit your challenges and solve the issues. Things happen when you are not professional. I actually admire your attitude. The main thing is you made it and it works properly and you have learned things. To be honest there are so many people making videos telling complete nonsense and explaining how things work but they actually do not know it at all but they keep on insisting that they are professionals. Sad time where there are no negative counter and someone who is professional gets dismissed by such content creators by saying that the professional is wrong with no proof what so ever. You haven’t done anything really bad or wrong. If you have built 10 of those you would become better. Your wiring would become neat. Your soldering skills would get better. You would get zapped once or twice but that would learn you to work with the left hand in the pocket when the amplifier is on. You would get at least one more multimeter and better probes. Some crocodile clams so you do not need to have your hands busy. Do not feel bad about anything. Same about playing. You do not live from it and you do not claim that you are professional musician. Play for your self and with the time you will get better. For your level in amp building and playing you did good job. Plus you haven’t tried to sell your self for something you are not. So you have earned my respect.
Thank you so much for your encouraging comment! I really appreciate your kind words and support. I started this channel to share my experiences and learn along the way, and it’s amazing to hear that my approach resonates with you. I believe in being genuine and honest about the challenges I face, and it's great to know that this attitude is appreciated. Each project teaches me something new, and I’m constantly learning and improving. Your advice is valuable, and I’ll definitely keep it in mind for future builds. I’m glad to have earned your respect, and I’ll continue to share my journey with the same honesty and openness. Thanks again for your encouragement and for watching my videos. It means a lot!
@DIY_AudioGarage You deserved it. Keep enjoying what you do. If you need to learn about tube amplifiers, I strongly advise you to watch videos of Uncle Doug. He explains things really easily, and he knows why and how things work. I watched it all enjoying the way he explained stuff, even stuff that I already knew for ages.
Damn thats some nice crispy gain on tap out of a plexi style amp build. I didn't see if you used any pedals, or is this just all amp? Nice!
Thanks for checking out the video! The guitar was connected straight into the amp with the wireless system. The sound was all plexi. I added a little reverb in post.
@@DIY_AudioGarage WOW...well hell yeah man that thang RIPS lol. So there's no diode clipping mods, symmetrical or asymmetrical, nothing? Cause that sounds at least to me that there is another gain stage or something. And that is not a knock at all bro, I like to be able to dial in preamp gain and also to get the power amp working hard. Because I've played many true Marshall 100w and 50w SLP, JMPs and to get those beasts really crunching it's rip your face off volumes lol. I am really going to look into one of these builds man, I REALLY want a good attenuator/load like a 2 notes or OX box but damn they are pricey. Cheers man.
@@PerfectCircle91 Thanks a lot! I'm glad you liked it! There's no extra gain stage in this build. I just added a post phase inverter master volume. This lets you get that crunch without needing to crank the volume to extreme levels. I totally understand wanting to balance preamp gain and power amp saturation, especially with classic Marshalls that need high volumes to really shine. A good attenuator/load box can definitely help manage that, though they can be pricey. Best of luck with your build, and cheers!
About have me encouraged to try and build one....don't be so negative about your playing...we all play at our own level and learn.....I'm 53 and still learning
Thank you so much for your kind words and encouragement! Building these projects can be so rewarding, and I'm glad to hear you're considering it. You're absolutely right about playing, it's all about enjoying the journey and continuous learning!!!
@DIY_AudioGarage exactly...music is one of the greatest enjoyments in my life and gives me an escape from time to time for at least a little while...
Those jumper wires go UNDER the board not on the component side. I usually roll my AX7s for AU7s. Still plenty of volume but cleaner top end and more headroom.
Thank you for your feedback. I followed the wiring diagram provided by MOJOTONE, and they illustrate placing the wires on top of the components. While you could route them underneath, it likely won't make a significant difference in functionality. Also, on their website, they have pictures of completed boards with the wires positioned over the top. Ultimately, when building it yourself, you can choose to run the wires over the top or underneath based on your preference, either approach should work without issues.
Great Job!
Oh man, thank you SO much! I took the class and built a 5e3,which was awesome! So I ordered the Brit 50 and opened it up and got scared because no manual lol. This will be a massive help!
Good luck with the build. Glad my video will help you on the process!!
Я подписался на ваш канал очень здорово! Очень хочется побольше таких видео ! Желаю вам удачи и успехов !
Did you half your impedance when you took out two tubes
Hey man!.. Love your videos..! I have built a couple of amps now, but not a marshall yet. What amp do you recommend to build as far as overall sound/usability ?? I have an attenuator so loud is no problem. Thanks!
Thank you for watching. I believe the choice ultimately comes down to personal preference, but my recommendation would be the JCM800. In my opinion, Marshall amps tend to sound quite similar to each other. However, the JCM800 stands out due to its versatility, thanks to its master volume and cascading gain stages. It's also easy to modify, allowing you to tweak the tone to your liking. That said, the Plexi is also excellent, though it has a slightly different sound, and it really boils down to what you prefer. Thanks again for watching my videos, and I hope this helps!
@DIY_AudioGarage appreciate it man.. Yeah, I'm confident I can get classic rock by dialing back the gain. And if metal is required, just crank it up!
Classic!
Excellent video. I think I’m going to order the kit. I’ve been wanting to build an amp for quite some time, and yours sounds really good. 👍🏼👍🏼
Awesome job! Love the meticulous wire routing. When you did the initial voltage testing without tubes, do you need a load on it, or is that only needed when you have tubes installed? Also, how does it take pedals? Does an OD/Distortion pedal sound good with it? "I'm not a good guitar player". You're better than you think you are. 😁
Hi @tim_shipp, it's generally recommended to have some form of load connected to mimic the expected operating conditions. This helps ensure the power supply and other components are functioning correctly under load. However, it's not strictly necessary for initial testing if you're just verifying the power supply is outputting the correct voltages. During my initial power-up, my main concerns were making sure there were no incorrectly connected cables that could cause a fire hazard, as well as checking that the filament voltage and negative bias voltage were present to prevent the output tubes from being overdriven and red-plating. As for using pedals, I've tried out some overdrive pedals like a Klon clone and the SD-1, and this amp takes them like a champ!
#20_NoPeace_ever_GreatAccomplish_CoolWayToGet_thetone_MyRegards_Love_UncleDoug_Psionic_theWebHasSewMuch_🇺🇸🇮🇱✝️
Thank s for watching!!
Nice build and sounds great. Ive done three builds so far and i pretty much used Hoffman turret boards and doing scratch builds and i definitely learned a lot from those builds.I did a Hoffman Plexi build thst tuned really good. I love this hobby! Keep it up man your doing good.
Thanks so much! It's really satisfying to successfully complete an amp build like this. That's awesome you built a Plexi amp too and were able to dial in the tones you were going for. The classics like that are always fun projects to take on. I definitely plan to keep building and learning more about amp design and construction.
I enjoyed this video very much :) commented timelapse is a great way :) I also like your voice and accent :)
Thank you so much!
Great build and sounds great!
Thank you!!
Great work, i'm wanting to have a crack at building an amp myself so really enjoy your vids!
Thanks a lot. I really enjoy building the amps and seeing the finished product! Good luck!!!
Sounds great! Congratulations ❤
Thank you so much!!
What size resistor do you have to ground to check bias? And what pin do I put them on?
It's a 1% tolerance, 1-ohm resistor connected from pins 1 and 8 to ground. In the original schematic, there is no resistor, and the connection goes directly to ground. When measuring milliamps, you place your negative probe on the ground and the positive probe on the bridged pins 1 and 8.
Here is a link where I got the idea from. bit.ly/4aX7R9k He has a lot of good info.
@@DIY_AudioGarage thanks! I just finished the exact same kit as you did. Sounds great just want to beable to make it easier to work on
@@Ginajenns Hey, glad to hear you finished the kit too! If you post a video, let me know. I would love to check it out.
@@DIY_AudioGarage I took a lot of pics but no videos on it but I will make one 🤙🏼
I believe you took out the standby switch which isn’t needed in most amps but that Marshall has a cathode follower tone stack and is solid state rectified which puts a lot of stress on V2 without standby. Eventually you’ll burn out that tube if you don’t allow V2 to warm up in standby.
Hi Jimmy! Thanks for the comment. I will definitely look into that. I am planning on moving the master volume to one of the input jacks and permanently jumper the inputs. The I can install the standby switch. That would be a future mod.
@@DIY_AudioGarage if it’s a PPIMV it will be noisy next to the input jacks - I know from past experience. You could put that in the indicator hole and drill an extra hole for the indicator I believe. Good luck with the build! Such a cool amp!
I didn't connect it to the input jacks right away because I had a feeling it might cause some noise. And well, it turned out I was right! I was hoping to avoid drilling new holes, but I'll follow your advice. Thanks for the heads-up.
Awesome! Do you have a link to that D-Lab video on the 1 ohm resister to ground you mentioned? Thanks!
Sure! Check this link: bit.ly/4aX7R9k/ . Thanks for checking out the video!!!
I'm getting ready to do my first build with the Mojotone British Style 50W kit and this is very helpful... Thanks!
Glad it was helpful! I hope it comes out great!!! Good luck!!!
Great build and the amp kicks ass .
Good sound man is it plate EQ?
I didnt add any EQ. I just added tiny amount of reverb. Thanks for whatching!
😂 no I meant is the tone stack powered by hi plate voltage or k follower. Sorry for my hillbilly slang
Really enjoying your channel, thanks for all the info. I just ordered the Mojo 2204 JMP kit. Wish me luck…
Cool!! Just take your time an triple check everything. Here is a guide that can help you: tinyurl.com/28r2s5k3/ . It has good explanations for testing and troubleshooting and other useful information. Just use the wiring diagram that comes with your kit and use this guide to help you along the way. Let me know how it turns out. Good luck 🎸🤘
Will do. Thanks for the link!
Good job man. Sounds good!
Glad you like it!
That's a cool amp and mod, man. I've been building for a year, and im on my 8th amp. An obsession lol. I recently watched a couple of Psionic videos on grounding. It was a bit of an eye-opener for me.
Thanks! I’m a little obsessed myself. 😂 this is my 5th amp I’ve built, but I started about 2 years ago. I’m about to build a plexi clone next. I’m a little addicted. I just love putting the pieces together and seeing the end result. Very satisfying.
Did you have access to the technical history of Slash's amp mods to recreate or did you just fiddle with the circuits by trial and error to match what your ear heard?
Hi @jaialaiwarrior, For this project, I leaned heavily on resources available online and insights from the Headfirst Amplification channel. It was a journey of trial and error to dial in the sound that resonated best with my personal taste. Achieving the exact Slash tone might border on the impossible, given the unique combination of gear, technique, and studio magic that defines his sound. However, I thoroughly enjoyed the process of implementing the mod and learned a ton along the way! The journey through the nuances of tone shaping and circuit tweaking has been incredibly rewarding. I hope my experience inspires you to explore and experiment with your own gear, embracing both the challenges and joys of crafting your unique sound.
Awesome job! Are you able to do just a summary list of the changes made also? I see something in the video description but between that and the schematics it's tricky for non-electricians to get a solid Idea of how complicated the mod actually was.
Hi @jaialaiwarrior, Thank you for your interest! I've included the schematic in the video description for easy download. All the modifications we've made are highlighted in red for clarity. This modification process is quite difficult. It requires making physical alterations to the amp, such as drilling new holes in the case to accommodate an additional 12AX7 tube socket and switch. Schematics: drive.google.com/file/d/1dfw0HUmDPSU5mQR2hyZUd0iVer1B03wg/view?usp=drive_link To give you a quick rundown of the components added during this mod: Capacitors: 2x 470pF disk capacitors 1x 2.2nF capacitor 1x 22nF capacitor 1x 100nF capacitor 1x 680nF capacitor Resistors: 3x 33kΩ resistors 1x 1MΩ resistor 1x 100kΩ resistor 1x 680kΩ resistor 1x 130kΩ resistor 1x 10kΩ resistor I hope this summary helps you understand the scope of changes made. If you have any further questions or need clarification on any part of the process, feel free to reach out!
Very cool tone dude, i am going to try the 2204 kit in a near future i’m gonna fall back to your channel for tips on the build 🤟👋
That’s really cool! Thanks for watching my video. Hope your kit comes out great. Let me know how it turns out.🤘🎸
I too have been learning from Jason at Headfirst 👍 Your playing is good my friend ! We all strive to get better but it’s a fun journey ! Vic from Vancouver Canada.
Hi Vic, It's awesome to hear you've also been tapping into Jason's wisdom over at Headfirst! 👍 His insights are incredibly valuable, aren't they? Thank you so much for the kind words about my playing. Cheers from Virginia USA!!
Great job man !! That amp sounds really good. I can't wait until you do the mods !!
Thank you so much!! I am palnning on the #36 mod with the extra gain stage in the near future. I am waiting for some componets to get here and I will get to work adding the mod.