How To Build a British JTM 45 Plus

Have you ever wanted to build your own British JTM 45 Plus? Once again, TubeDepot gives you the tools, the how-to, the know-how and the what's up, all on the QT and very hush hush. Sit back and watch as we will school you in the ways of tools and solder, of tubes and wire, of components and screws. All you need is time, a willingness to learn, and our kit. Host Rob Hull is your guide.
JTM45+ Combo: tubedepot.com/products/classi...
JTM45+ Head: tubedepot.com/products/classi...

[@Bleats_Sinodai]

I love how he just runs his hand over the knobs and puts everything at 10.

[@pavetheway]

He surfs.

[@theonewease]

That's how Randy Bachman (BTO) did it with his Sunn Model T's every gig.

[@Allguitarinfo]

Dude dimed. Every knob....love it..

[@unhinged17]

That's what I used to do all day long! I did start off slow, but by the time I finished working there I was up to 2 full amp chassis per day. And I LOVED it!!!

[@runrabbitrun4342]

really What year?

[@mattbortz10]

Jerry D 1700s

[@ericarway]

Your wiring and assembly is beautiful!

[@muaythai4lifelife]

These vids make me want to start soldering and building amps :) even if I can only make bad soldering :)

[@TubeDepotTV]

what may start off as bad soldering will quickly become extraordinary soldering with a few hours of practice. Soldering isn't difficult once you learn the correct methods and have good tools.

[@crnogor]

Don't be scared , practise on an old , broken radios , TV , etc ! It's more easy cos is not board soldering for what I hawe still no guts ! I will recomend Y to use Silver based soldering wire , (for better and cleaner contact , with less corosion ) plus if Y can find , to be filled with cleaning cemical , inside , or if can't , use a quality paste to put on contacts , soldering iron ,etc , before Y start with contacting parts ( melting down soldering wire ) ! Ask a pro for recomandation , wich power of a soldering pen is gona suite Y ! Enjoy in future projects !

[@muaythai4lifelife]

thanx so much :D

[@sav7152]

Disregard last post about finding the right kit. This it it! Awesome!

[@Burbah]

You're doing an amazing work ! Thank you very much for the tutorials !

[@bmcash3411]

Great video and very informative. I love the roll of the knobs at the end.

[@MickLBrad]

Nice video. It takes me back to the days of my youth in the 1950s when I scratch built a lot of my Ham Radio equipment. Thanks for sharing.

[@fafkes]

Great to see you're back guys!

[@josuecintron7230]

Tube Depot, I love your videos, everytime I see one of your videos I imidiately get the urge to build one of your kits (specially this one ) but unfortunately my financial condition don't allow me to do so. I love your channel. You Guys Rock, Sincerely; Josh

[@halbertking2683]

Love the nuanced control adjustment . Dime It.

[@electronicshelpcare]

excelente, very nice work

[@rockerdartdude7913]

Very nice job guys. Im actually building an 18 watt self-biased amplifier at the moment and this is great to watch!

[@lousekoya1803]

Great demo !!.........Thank you guys!

[@anthonyiodice]

My god where has this channel been all my life

[@FloridaManMatty]

And why haven’t they updated with new amp builds lately?!?!

[@CRLAMB]

Fantastic sound.

[@sebastianvergara8175]

This video is so satisfying!

[@fattirevsbud]

best video I've seen in forever!

[@maryannmoran-smyth3453]

This is my kind of father and son project… Keep on rockin

[@RunawayThumbtack]

This was a lot of fun to watch. I'd really like to try building a head sometime soon.

[@Chromatype]

Rob Hull! You are the MAN!

[@awesometylerable]

I wish more than anything that you guys offered a video (and kit) on installing an optional FX loop. That would be so amazing.

[@FullMetalHippiecom]

Great video and great sounding amp! I imagine that the voicing of the amp on the board is another project altogether.

[@GUITARZ5150]

i just finished building this amp 2 weeks ago and let me tell ya this head will blow your mind. And oh my god is it LOUD. I run mine without the rectifer tube and leave the 50 watt switch on the 50 Watt position. My signal chain is an MXR Carbon copy into an MXR gt-od, into a Boss turbo distortion, MXR 6 band eq, and then into a homemade volume attenuator to switch between rhythm volume and lead volume. Jumper the inputs, and tinker until you get the tone you want. You will not be disapointed!

[@akkudakkupl]

Thanks. This is some quality knowledge!

[@matt23nyc]

You guys make it look so easy. Great work! I plan to get this kit at some point. My biggest fear is screwing something up though.

[@PRSguy94]

@TubeDepotTV I'd be "road testing" those every moment of spare time I had! And building them, and testing them, and modifying, and enjoying the amazing tones that only a true vintage style amplifier can provide.

[@MyAAAAAZZZZ]

Well done, great compliments ...

[@Zylstra555]

What fun! Thanks for sharing.

[@JRP3music]

I got a used Mesa Boogie Nomad 100. The tubes are from Tube Depot! Sounds great.

[@JohanSegeborn]

Thanks, great video!

[@greggraham8532]

Hey Rob, try using nut drivers instead of pliers or an adjustable wrench to tighten the nuts on the front panel switches and pots. Nut drivers fit the nuts securely, won't slip, and have a smooth surface so they won't scratch. Otherwise, very instructive video! Thanks, Greg.

[@jernejkurincic9050]

In my experience just tightening the driver by hand (without a ratchet) is also just the right amount of tight ...

[@jimraimondi410]

that amp sounds incredible

[@panospylar]

I have been watching this video for the last six months and i cannot wait to gather some money to buy the kit and make the amp myself!

[@PRSguy94]

@TableWolfMusic I was talking about effects pedals. And I too, have a deep desire for a TubeDepot amplifier kit!

[@roxstareightysix]

Inspiring, I wish i had the tools.

[@DogDaze66]

Great Video , Thanks , Most tech guys act like they are secret scientists or some shit , Luckily Guys like you show the love and know how to help others.

[@senescienza7465]

Good job!

[@makeshiftJake]

Very slick amp, exactly what i am looking for. To bad i don't have the space or tools to accomplish building one. Very good video.

[@IensenMusic]

I´m waiting exactly for that!!! Please please do it!!

[@radman1102]

Cool, I'd be very interested in that amp!!

[@billyb440]

Now that was very interesting, i loved the rock paper scissors at the end, LOL

[@grahampinkerton2091]

I built These things back in the sixties, since then i´ve moved on a bit. Semiconductors will do the Job very well too

[@TimScottGuitar]

Oh man this is awesome!!! I want one!!! :)

[@bielfotografia7824]

I was wondering which ones could I use... Thanks so much!!!

[@arjunkaul]

Great work guys (y)

[@holdenfarmer]

I love the MojoTone Amp Kits,they have the best of every thing you'll need in your dream Amp!The 1959 100 watt Plexi British Amp "TUBE" is the very best you can ever use!My 14 year old son and my and my self have been working on our second tube amp now,and the results are unreal.To even consideration to purchase such an Marshall Tube Amp would be in excess of 5 to 10 thousand dollars!I know there are critics out there that saying,OH NO!A fact though.

[@colefisch931]

fastest amp to dial in on the planet! I love the hand swipe to max her out! lol

[@luisantoniomarrega1120]

Amigos, esse amplificador ficou beleza. Fantástico! Rio RJ

[@josegabrielgarcia8483]

this is awesome

[@JohnTheRipper2]

jesus, this amp sounds like a beast!

[@TruthSurge]

Great vid! Very interesting. yeah, the ole western shootout scene. hahaha can you tell me the cost of the kit? Just curious.

[@WarrenJamesAcoustic]

I wish you would build me a fender tonemaster, I owned one and my amp tech said that looking inside it was a work of art.... or a twin reverb without a printed circuit board, the old fashioned way, unlike the modern clones.

[@arjunkaul]

Thank YOU! You guys just built and totally nailed Marshall's greatest amp (a Fender copy nonetheless) Keep goin (y)

[@TruthSurge]

@TubeDepotTV Thanks.

[@muaythai4lifelife]

Thanx so much ;)

[@jjlwis]

holy crap that's awesome!

[@POsomething]

Thank you!

[@jordanprysmiki5361]

Yo this is sick!

[@nerguss]

My little children after this video began to play the game - "Who will play first? (Clap-clap-clap!!!)" =) Thank's for all videos))

[@ronnieparfait]

Sounds exactly like my 80’s Peavey Bandit.

[@jpalberthoward9]

Oh hell yes! Great googalamoogala! This is the one that sounds like God shouting from the mountaintop! Many of us in the over 50 camp think of these as the "Allman Brother" Marshalls, violin-like sustain for days, killer for slide (brother Duane), goes with a Les Paul like beer goes with pizza! Who the hell needs pedals? Only 1 down side, grumpy grouches will be screaming "TURN IT DOWN" constantly.Not recommended for apartment dwellers or small beer joint gigs. A truly awe inspiring amp!

[@mauro12mdp]

Hi guys ! Your work looks formidably neat ! On the other hand, I'm building a '59 Fender Bassman model 5F6 and was thinking about doing some modifications (I'm aware that a JTM45 and Fender bassman are quite identical in some aspects): 1- Changing to a solid state rectifier 2- Inserting an effects loop 1- If I do this, should I change some capacitors values in the rectifying section for bigger ones ?? (I mean with more capacity) 2- I've heard that this might be a waste of time in a fender bassman because the difference in tone wouldn't be that noticable... And as a valve state amp, matching the impedances would be quite troublesome and I would have to design some buffer to lower the impedances and back. Anyway, I'm an amateur on this, what would you recommend ? Thanks for your time!

[@zoomer51]

best amp ever !

[@DANTHETUBEMAN]

full scrape,,, i like it loud,,, you had the master volume down right :)

[@renemikkers6404]

I always pre-solder the input sockets at the outside of the amp. After completion, remove the whole assembly and re-install in the inside

[@PRSguy94]

@TubeDepotTV Very true. If I was building the amp I would try and be as true as possible to the original tube compliment. KT66 tubes just have such a unique tone. Many people don't know this but the KT66 was a big part of Jimi Hendrix's sound. More bass than an EL34, more mids than a 6L6. Ton's of headroom, a good example being the Monterey Pop festival songs.

[@brt927]

I love the way this sounds cranked. Pure awesomeness. I have never built an amp before but have a little experience with working with electronics. Which build would you suggest for a beginner? Thanks!

[@TheMeJustMe75]

I would love to learn how to build my own 2 channel, twin reverb combo amp with effects loop.

[@FloridaManMatty]

A Twin Reverb with a master volume, foot switchable channel boost, and buffered effects loop is on my bucket list for DIY builds. There are some incredible tweaks and channel mods floating around online from some amazing amp builders. One day...😁

[@snpv7679]

Hello, you are a master of the amps ... first of all this is a translation since I do not know English I am Spanish sorry..I have a question I want to mount a 6n2p and a pcl86 to make a 6w on a vintage radio chassis but I have a doubt about the mass ... gnd .... and the chassis..I do not know whether to make the chassis driver with gnd ... and if that is how I do it ... I connect all the points of mass to a single point ... it can be done in several ... or only the potentiometers and jacks go.

[@dyakel101]

@ChrisVGuitarist Thanks! I love that guitar!

[@deebee8935]

Nice build..14:52..man you are speedy!

[@bielfotografia7824]

Thanks!!!

[@phayzyre1052]

Let me know when you release a kit to build a 1962 Bluesbreaker amp.

[@yazd06]

Would it possible to have a demo of the amp. I know that there's one on KZbin but there's so much effects on it. I'd love to hear it - as the audio sample at the end of your video sound just great - and the difference when you play with the different parameters you added to the JTM45+. Anyway, thanks a lot for all your videos and for sharing your amp knowledge.

[@ElectrikYang]

Oh sweet! thanks!

[@bmwm3cs]

Great Video! I wish you did a more technical one though...

[@nerddujugement8334]

looks really cool. has anyone tried these? how's the price vs sourcing parts yourself? i have already assembled a mic pre (solid state with pcb) does that seem like enough experience?

[@MaxmadmaxRockatansky]

Great video. Hi, which name yellow tool clears the edge of the hole?

[@Richard_P_James]

Such neat wiring and attention to detail - truly excellent! So, when are you going to build a Marshall Major copy...?

[@johnmayer2236]

My fav:source for wires caps ect:let me know when you have 18 AWG vintage cloth waxed wires.

[@raytheprinter]

I wish you would make some videos really showing how your kits sound.I would like to hear more before buying.Thanks

[@ciepularys]

raytheprinter i can tell you right now even without using them, that these are of great performance

[@bluesdog88]

Great work guys, thank you!! Lets see the hot rodded plexi ;)

[@sameasnow]

I'm interested in the kits is this a condensed version of the video companion to the assembly instructions or the full assembly video? thanks

[@jordanprysmiki5361]

Do you have a master volume version with a high voltage effects loop? With the plates to match?

[@sergiocruz199]

parabens muito bom o projeto..pode informar o esquema dele?? abraços...

[@opus1956]

Sweet!

[@endahatmala9089]

i like it

[@richiewichie]

wow!! awesome! What is the feedback switch for???

[@captainoblivious1]

This channel is awesome why am I 6 years late?

[@bielfotografia7824]

Dudes!! Great job!! Just a question... What's the power rating of the pots?

[@JackNorrisPCR]

@TubeDepotTV Very cool!

[@PoorTom]

You guys should do a video showing the tones

[@MPCapricorn]

Hi, I don't know if you have answered this already, but is there a full assembly video of the amp? Would be very interesting! Anyway very nice work and sound of course!!

[@Jafetlugo]

Best channel Ever!

[@TubeDepotTV]

Herber, you are fantastic. Thanks for the great comment.

[@yyabay]

r u sure?

[@theDesnoumond0]

thx an other question al the parts you use can I them loose or is it special made for this project?

[@TheNego]

Hi guys at TubeDepot! Just wondering if you have ever considered a B15N kit, if you do, or even a one off let me know Im in!

[@DarthEcoli]

Do you have specs in the kit to build it without the master volume, and other added controls? I'd prefer to keep it as close to an actual JTM 45 as possible.

[@AndyWragg]

HI there Tube Depot guys. Great instructional video, I'm half way to building my own version of this amp. One thing about your output transformer, what impedance is the primary winding?

[@crobulari2328]

If you use 2 output valves the primary winding is 8K with centre tap. Using 4 output valves the primary is 4K with centre tap. Not critical. If using an ultra linear transformer the screen taps would be at 66%. This for 6L6, EL34, KT66 etc. If using EL34 don`t forget to earth the suppressor screen on the valves you can then swap EL34 and 6L6 valves. The original JTM 45 with aluminium chassis used 2 X KT66. Ask me how I know. The first very 4 valve versions of this amplifier had 2 Radiospares 30 watt output transformers with the primaries in parallel and the secondaries (2 X 4 ohm taps ) in series. Ask me how I know that as well. I was stuck for an O/P transformer once so to get out of trouble I used a power transformer. The 375-0-375 rectifier windings for the anode feeds and the 6.3 volt heater winding for the speakers. Worked a treat for guitar. If you get any 100HZ hum then move the 1st pre anp cathode earth point along the chassis. Good luck.

[@AndyWragg]

Crobular I Thanks for the reply mate. Can I dig a little further with you. I've seen JTM 45 transformers with 3 different primary impedances, 3.6k, 6k and 8k. I'll be using EL34's (possibly 6L6), so which of these is correct? I'm having my transformers custom wound by a friend that works in the industrial transformer business so I'd like to get this right.

[@johnmcclinton9124]

You're doin a graet job. Was wondering how much does this kit cost?