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!
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!!!
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.
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 !
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.
@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.
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.
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!
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
@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.
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.
***** i would like to see you come out with a vintage style super lead ( hendrix style) with the 4 input jacks on the front. although this amp looks nice and im sure sounds nice that master volume instead of a 4th jack kinda blows it for me :(
+TubeDepot Great price for the your kit without breaking the bank, example I found a half for 1600 100watt, price of this kit I would have extra left over for a decent cabinet plus buy few pedals. Would you be coming out with a 100 watt kit that can switch between kt66, el34 and 6l6 tubes, resonance knob, master volume and a jose mod.
+DALE97DSM i disagree. for the price you could get a used genuine marshall. nothign against TD but if you can buy a genuine marshall combo amp for 600 to 700 ( and that is new) why spend almost a grand on the TD one? if you can get a used marshall head for 600 to 800 why get the td head kit? i always wanted one of the kits but the lack of funds and price compared to a genuine marshall just doesnt justify it.
+lordraptor11 while it is true that marshall has some excellent tube amps and amp heads in that price range, but if you want a marshall reissue of a jtm45 head it'll run you about $2000 @ guitar center and if you want a jtm 45 combo the closest thing currently offered is the blues breaker reissue (which isn't exactly the same, 2 x 12 speakers, 30 watts instead of 45, and with a tremolo ). compared to these amps you do save building a kit from tubedepot. But you have a point that alot of people figure that a DSL40C would be close enough for less money. personally I'm building the jtm45 combo.
Where is the master volume in the signal chain? Does it turn the guitar signal down before the tubes or the output signal down after the tubes? If you pit the MV at 10, is that the same as a non-MV setup? May buy the kit this week. Haha
Is it "hot" enough as is? Or would it make sense to maybe add a one-wire mod... maybe through a switch so it could be turned off again? Would love to get more sound bites.
What is the reason behind twisting the wire? I know I've seen that a lot in electronical devices but I have no idea since some other wires are just packed together. To stay on place better?
the filament circuit is an A/C circuit,not D.C circuit. So this low voltage circuit carries 60 Hertz. Twisting the wires makes the magnetic field cancel out and makes less chance for hum.
Thanx, I'd mainly do guitar maintenance works... ( potentiometers, switch, pickups, groundings). How many watts should the iron station be? 30,40w or higher. A good brand for that ( long lasting) Thanx
for PC board work and general wiring, a 25W iron is excellent. However it may not have sufficient thermal mass for larger soldering jobs. A 40W iron is better for soldering to the back of pots and to terminals but the heat from these irons could potentially damage components and melt insulation. Better to have either one of each iron, specialized for the job at hand, or purchase a temperature controlled soldering station. The single wattage irons run around $30 a piece. A temp. controlled station runs about $100 (well worth the money if you solder regularly).
I'm Thinking of buying this kit but there's no sound bites anywhere. I assume with 5150 in your tag you would know. Will it get that 78 Brown Sound. Will it clean up nicely when you roll the volume down on the guitar?
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!!
Hello, i like very much your channel, and i find it very interesting. Please i've seen a tool you use which i need but i don't know is name and i can't find in shops, so i would like to have some information. I mean the tool you use at min 1.22. Is that a sort of manual hole maker (sorry for bad english)? Something that make small hole to steer the drill? What is his name, where i can buy it? thank you very much
it is a spring loaded center punch I do not know what country you live in Nico but in the states they are available at Harbor Freight or at metal working supply stores for a few bucks, or if you are poor, a finishing nail and small hammer will do the same thing
i'm italian, every time i try to find it in a shop of my city, people took me for crazy! amazing, i finally found it online, thank to all of you, and still to built tube amps ;)
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...😁
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.
Do hour guys make a kit close to a Marshall 1959 plexi If so is the kit close specs wise to the original 1959 then the current reissue that marshall current makes ?
hi dear, how are you? please, maybe you can help me in my doubt, i want to built in my own home my LA2A original audio circuit, using commum electronics components of the current stores. how dificult is it for a person that have basic eletronic knowlogdes? will the quality near as the old original if i use exactly the same original eletronic plan? does it will be worth in cost of money, time spent, and quality? i saw the plan, i think it will be easy, maybe i can make it to sell if it works well, could you clear me better? maybe can i start with a more simple project to learn?
Would it possible to have a demo of the amp. I know that there's one on UA-cam 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.
@TubeDepotTV My point was that just because the Marshalls used the EL34, the EL34's we not the reason that the amps were failing so much. And if you've got the time, what's your opinion on the new Tung-Sol KT120? Good, bad, crazy stupid?
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.
Erwin Turcinhodzic I think so, if you can read a layout and check everything. Theory helps. I plan to build one knowing very little about the theory behind it all, but just the basics about how to solder, etc
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?
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.
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.
Just to be safe, take a 1 watt 1K ohm resistor. Solder it to two pieces of stranded wire. One piece on each lead. One the ends of the wire put an alligator clip. Clip the resistor between a filter cap. (These are the big can caps right off the diodes or rectifier tube) Clip onto the + terminal of the first filter cap into the circuit. Then clip the other end to the ground. Always wait 3 -5 minutes after an amp is turned off to touch anything. This R jumper will bleed any stored charges. :-)
The diode placement differs from the PDF in this video Pin 4,6 to 1.....in the PDF layout it goes from 4,6 to 3. Which is correct need info cause im building this kit.
dear tube depot how much roughlly will it cost to buy and send a jtm45 head kit to scotland including taxes etc etc , ps, what a beautiful jobyou guys did on the build , sounds amazing too plz anz back , many thanks!!!
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!
it stops the jack from spinning in the socket. Plus you can connect the shielded side of the jack to the grounded washer via a cap to shed RF noise that is riding on the guitar cable.
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!
What software is being used in the background for the layout of the amp? I've always been curious. It seems very helpful. Especially in the case of making the board.
@TubeDepotTV I think it's a little bogus that the american distributors were putting 6550 tubes into the amps just because there was a "high failure rate". But I quote Ritchie Fleigler "These things were not used to play surf music!"
Amps can do strange stuff. Even after discharging the filter caps stray voltages from other caps can recharge them to a point. It will not kill you, but it is not pleasant. The jumper I mentioned keeps bleeding current to ground and keeps the caps discharged. ALWAYS REMEMBER TO REMOVE THE JUMPER when you are done with working on the amp, & or before you turn the amp on. It usually just blows fuses, but you will feel stupid either way if you forget.
Im very interested in this amp but cannot find any videos other than this one showing the tones. The only other one has the guy running effects pedals which defeats hearing the amp
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
I love how he just runs his hand over the knobs and puts everything at 10.
He surfs.
That's how Randy Bachman (BTO) did it with his Sunn Model T's every gig.
Dude dimed. Every knob....love it..
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!
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!!!
really What year?
Jerry D 1700s
My god where has this channel been all my life
And why haven’t they updated with new amp builds lately?!?!
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.
These vids make me want to start soldering and building amps :) even if I can only make bad soldering :)
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.
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 !
thanx so much :D
Disregard last post about finding the right kit. This it it! Awesome!
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!
This is my kind of father and son project… Keep on rockin
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.
@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.
Very nice job guys. Im actually building an 18 watt self-biased amplifier at the moment and this is great to watch!
Your wiring and assembly is beautiful!
Great to see you're back guys!
Great video and very informative. I love the roll of the knobs at the end.
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.
In my experience just tightening the driver by hand (without a ratchet) is also just the right amount of tight ...
Love the nuanced control adjustment . Dime It.
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!
OCDs about some wires inside but eyeballs switch holes on the outside... why not measure the locations before inserting the other components?
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
@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.
This was a lot of fun to watch. I'd really like to try building a head sometime soon.
@TableWolfMusic I was talking about effects pedals. And I too, have a deep desire for a TubeDepot amplifier kit!
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.
that amp sounds incredible
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.
Great vid! Very interesting. yeah, the ole western shootout scene. hahaha
can you tell me the cost of the kit? Just curious.
Rob Hull! You are the MAN!
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
I think about a hot-rodded plexi kit all the time ...
***** i would like to see you come out with a vintage style super lead ( hendrix style) with the 4 input jacks on the front. although this amp looks nice and im sure sounds nice that master volume instead of a 4th jack kinda blows it for me :(
***** actually think of a hendricks style superlead with the 4 input jacks but instead of just a head make it a combo ;)
+TubeDepot
Great price for the your kit without breaking the bank, example I found a half for 1600 100watt, price of this kit I would have extra left over for a decent cabinet plus buy few pedals.
Would you be coming out with a 100 watt kit that can switch between kt66, el34 and 6l6 tubes, resonance knob, master volume and a jose mod.
+DALE97DSM i disagree. for the price you could get a used genuine marshall. nothign against TD but if you can buy a genuine marshall combo amp for 600 to 700 ( and that is new) why spend almost a grand on the TD one? if you can get a used marshall head for 600 to 800 why get the td head kit? i always wanted one of the kits but the lack of funds and price compared to a genuine marshall just doesnt justify it.
+lordraptor11 while it is true that marshall has some excellent tube amps and amp heads in that price range, but if you want a marshall reissue of a jtm45 head it'll run you about $2000 @ guitar center and if you want a jtm 45 combo the closest thing currently offered is the blues breaker reissue (which isn't exactly the same, 2 x 12 speakers, 30 watts instead of 45, and with a tremolo ). compared to these amps you do save building a kit from tubedepot. But you have a point that alot of people figure that a DSL40C would be close enough for less money. personally I'm building the jtm45 combo.
Very nice and informative. Where are these kits available?
Where is the master volume in the signal chain? Does it turn the guitar signal down before the tubes or the output signal down after the tubes? If you pit the MV at 10, is that the same as a non-MV setup? May buy the kit this week. Haha
I was wondering which ones could I use... Thanks so much!!!
Is it "hot" enough as is? Or would it make sense to maybe add a one-wire mod... maybe through a switch so it could be turned off again?
Would love to get more sound bites.
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.
I got a used Mesa Boogie Nomad 100. The tubes are from Tube Depot! Sounds great.
Great demo !!.........Thank you guys!
Great video and great sounding amp! I imagine that the voicing of the amp on the board is another project altogether.
You're doing an amazing work ! Thank you very much for the tutorials !
What is the reason behind twisting the wire? I know I've seen that a lot in electronical devices but I have no idea since some other wires are just packed together. To stay on place better?
the filament circuit is an A/C circuit,not D.C circuit. So this low voltage circuit carries 60 Hertz. Twisting the wires makes the magnetic field cancel out and makes less chance for hum.
alexander gonta 2
Thanks a lot!
Thanks, great video!
fastest amp to dial in on the planet! I love the hand swipe to max her out! lol
And what about power ratings of speakers?
Should I just go with circa two times the output of my amp, or should I get even higher rated ones?
Thanx, I'd mainly do guitar maintenance works... ( potentiometers, switch, pickups, groundings).
How many watts should the iron station be? 30,40w or higher.
A good brand for that ( long lasting)
Thanx
for PC board work and general wiring, a 25W iron is excellent. However it may not have sufficient thermal mass for larger soldering jobs. A 40W iron is better for soldering to the back of pots and to terminals but the heat from these irons could potentially damage components and melt insulation. Better to have either one of each iron, specialized for the job at hand, or purchase a temperature controlled soldering station. The single wattage irons run around $30 a piece. A temp. controlled station runs about $100 (well worth the money if you solder regularly).
I'm Thinking of buying this kit but there's no sound bites anywhere. I assume with 5150 in your tag you would know. Will it get that 78 Brown Sound. Will it clean up nicely when you roll the volume down on the guitar?
Is the master volume you added a post phase inverter master volume?
Is a full length version of the build available?
I wish more than anything that you guys offered a video (and kit) on installing an optional FX loop. That would be so amazing.
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!!
Do you have a master volume version with a high voltage effects loop? With the plates to match?
My little children after this video began to play the game - "Who will play first? (Clap-clap-clap!!!)" =) Thank's for all videos))
The overdrive in the end of the video is just the amp? Thank you
wow!! awesome! What is the feedback switch for???
Sweet!
Will these work in europe with 220 volts?
Dudes!! Great job!!
Just a question... What's the power rating of the pots?
Fantastic sound.
Is that "filament" thing really necessary or are they just cosmetic accuracy? Wires from A to B won't do?
olifilipe - the twisting of the filament wires keeps the hum levels down inside the amp.
Hello, i like very much your channel, and i find it very interesting. Please i've seen a tool you use which i need but i don't know is name and i can't find in shops, so i would like to have some information. I mean the tool you use at min 1.22. Is that a sort of manual hole maker (sorry for bad english)? Something that make small hole to steer the drill? What is his name, where i can buy it? thank you very much
that's a puncher, it makes a little hole mark good enough for the drill bit to start the hole without slipping
it is a spring loaded center punch I do not know what country you live in Nico but in the states they are available at Harbor Freight or at metal working supply stores for a few bucks, or if you are poor, a finishing nail and small hammer will do the same thing
i'm italian, every time i try to find it in a shop of my city, people took me for crazy! amazing, i finally found it online, thank to all of you, and still to built tube amps ;)
Great video. Hi, which name yellow tool clears the edge of the hole?
What is the extra knob for where the 4th Jack usually is?
I would love to learn how to build my own 2 channel, twin reverb combo amp with effects loop.
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...😁
Whose kit is this? what manufacturer or website can I get this kit
Thanks great Video
J
we are the manufacturer of this kit. The kit can be purchased from us, tubedepot(dot)com.
This video is so satisfying!
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.
Do hour guys make a kit close to a Marshall 1959 plexi
If so is the kit close specs wise to the original 1959 then the current reissue that marshall current makes ?
The Marshall 1959 model is the 100W version of the Marshall model 1987 50W amp. The two amps are very similar, with similar tones.
hi dear, how are you? please, maybe you can help me in my doubt, i want to built in my own home my LA2A original audio circuit, using commum electronics components of the current stores. how dificult is it for a person that have basic eletronic knowlogdes? will the quality near as the old original if i use exactly the same original eletronic plan? does it will be worth in cost of money, time spent, and quality? i saw the plan, i think it will be easy, maybe i can make it to sell if it works well, could you clear me better? maybe can i start with a more simple project to learn?
thx an other question al the parts you use can I them loose or is it special made for this project?
Would it possible to have a demo of the amp. I know that there's one on UA-cam 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.
@TubeDepotTV My point was that just because the Marshalls used the EL34, the EL34's we not the reason that the amps were failing so much. And if you've got the time, what's your opinion on the new Tung-Sol KT120? Good, bad, crazy stupid?
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.
Cool thanks! Is there a mod for using 6l6 powertubes?
Great Tools!Were Can I Buy Them,Please?Thank You!
Does it sounds better than the original?
Is there any other benefits of buying this kit beside the fun of making it?
Is it possible to build this, without any experience in electronics?
Erwin Turcinhodzic I think so, if you can read a layout and check everything. Theory helps. I plan to build one knowing very little about the theory behind it all, but just the basics about how to solder, etc
Erwin Turcinhodzic Ho yes ;)
Crunchifyable2
Crunchifyable2
+Erwin Turcinhodzic But you will want to take it to the shop to get the power tubes biased, or learn to do it yourself.
Do you have to drill the turret board your self?
from ground to the positive post on the can cap i just got 1095 on the 600v setting?? where could i have gone wrong
best video I've seen in forever!
wrong at the start with the fillament wires, chech the black and red wires twisted together
Oh man this is awesome!!! I want one!!! :)
Can you do video on building a vintage AC30/6 TB complete with Vibrato and Tremolo? I'd be thrilled!!
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?
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.
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.
Just to be safe, take a 1 watt 1K ohm resistor. Solder it to two pieces of stranded wire. One piece on each lead. One the ends of the wire put an alligator clip. Clip the resistor between a filter cap. (These are the big can caps right off the diodes or rectifier tube) Clip onto the + terminal of the first filter cap into the circuit. Then clip the other end to the ground. Always wait 3 -5 minutes after an amp is turned off to touch anything. This R jumper will bleed any stored charges. :-)
You guys should do a video showing the tones
All very fine, but does it go to 11?
I´m waiting exactly for that!!! Please please do it!!
Such neat wiring and attention to detail - truly excellent! So, when are you going to build a Marshall Major copy...?
The diode placement differs from the PDF in this video Pin 4,6 to 1.....in the PDF layout it goes from 4,6 to 3. Which is correct need info cause im building this kit.
dear tube depot how much roughlly will it cost to buy and send a jtm45 head kit to scotland including taxes etc etc , ps, what a beautiful jobyou guys did on the build , sounds amazing too plz anz back , many thanks!!!
See it only takes 15 Minutes to build one from scratch LOL
***** Unnecessary retarded remark bud.
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!
A grounding washer on a plastic jack (8:47)? I can't see where it makes contact with anything, so what does it do?
it stops the jack from spinning in the socket. Plus you can connect the shielded side of the jack to the grounded washer via a cap to shed RF noise that is riding on the guitar cable.
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!
What software is being used in the background for the layout of the amp? I've always been curious. It seems very helpful. Especially in the case of making the board.
Mynor Gonzalez - Inkscape
I wish you would make some videos really showing how your kits sound.I would like to hear more before buying.Thanks
raytheprinter i can tell you right now even without using them, that these are of great performance
@TubeDepotTV I think it's a little bogus that the american distributors were putting 6550 tubes into the amps just because there was a "high failure rate". But I quote Ritchie Fleigler "These things were not used to play surf music!"
Now that was very interesting, i loved the rock paper scissors at the end, LOL
1:32 You're better off using a 1/2" socket extension piece to hammer those nuts in, one good hit will do it and they'll be in tighter :)
Amps can do strange stuff. Even after discharging the filter caps stray voltages from other caps can recharge them to a point. It will not kill you, but it is not pleasant. The jumper I mentioned keeps bleeding current to ground and keeps the caps discharged. ALWAYS REMEMBER TO REMOVE THE JUMPER when you are done with working on the amp, & or before you turn the amp on. It usually just blows fuses, but you will feel stupid either way if you forget.
Im very interested in this amp but cannot find any videos other than this one showing the tones. The only other one has the guy running effects pedals which defeats hearing the amp
I built These things back in the sixties, since then i´ve moved on a bit. Semiconductors will do the Job very well too