Hear the new StewMac '62 Brit-Plex amp kit - a hand wired JTM-45 Plexi style head in a kit!

[@mgalbu]

So great to have a quality kit being offered by you guys. For the record, Jim Marshall didn't design any of the circuits of his amps as he had no EE background. The guys behind the electronics were Dudley Craven and Ken Bran. Ken Underwood took part in the building of the initial batch of amps supplied to Jim Marshall, and is the only one of them alive today to tell the story of how Marshall amps got first started. Look him up. Cheers.

[@SDPickups]

JTM45 was a Fender Bassman copy. The first ones they built used 5881 power tubes. Shortly after they switched to KT66's which basically sound the same as 6L6 power tubes (which were hard to get in Britain). And Leo got the circuits from the RCA tube manuals of the time, almost all the amp builders got their circuits from that as well.

[@lolwithme36dd]

Hell yeah

[@simonkormendy849]

It was actually Ken Bran and Dudley Craven who were responsible for the design of the Marshall JTM45, but they based it on the Fender Tweed Bassman.

[@paroblynn]

This is sweet. I'd love to see some more like this from you folks in the future! This is beyond cool.

[@nathanabbs6213]

Release a 6505 edition and im sold

[@chrisbrumbaugh9936]

That's still a production amp IDK🤣

[@simonkormendy849]

I've never understood why people insist on only using the neck pickup on a two humbucker equipped guitar, especially with the tone rolled all the way off so they get this muffled and bass-heavy tone, when they could get a much better tone with the bridge pickup.

[@freepressright]

This! I don't wanna hear muffled and garbled mush. I want to hear the clarity of a crystal clear overdriven bridge pickup. I was just about to make the same complaint. This demo sucks.

[@reddsshaker3477]

Agreed. Mushy, flatulent. Bleh.

[@univalve1]

@@freepressright i think it goes back to that nonsense clapton started with "woman tone" yes it sounds like total crap. thing is i have a 1959 plexi circuirt amp and it can put out great neck pickup tones. But clowns like this play it in this muddled mess of a style.

[@chrishopkins209]

Actually it was Ken Bran who designed the JTM45

[@pleximanic]

It was actually Dudley Craven.

[@Fastfritz63]

I believe Ken Bran was instrumental to the development of the Model 1959 Super Lead circuit, atleast that's what he told me when I met him back in '87 during the Jim Marshall Anniversary tour of music stores...I met both of them at Robbie's Music in Mahwah, NJ

[@Paqqqman]

It was actually Leo Fender

[@gib412]

@@Paqqqman Who got it from an RCA manual.

[@rjake61]

@@gib412 Not really.

[@paulferrell5209]

Do a demo of the clean tones as u turn that thing up.

[@markj6506]

So the first tune you were ripping out I heard Hendrix,and Then I said oh man please rip out a cream tune, it's like you heard me. You know when something sounds right, your brain goes ooooooo!

[@jimseals8659]

Right off the Disralei Gears album...

[@TweedSuit]

Props for demoing through the Normal channel - Clapton style.

[@TempoDrift1480]

Is this a normal kit but marked up 200 percent? Like a file or something?

[@TempoDrift1480]

Of course it is... What a silly question.

[@ses7945]

Please make a Stew Mac emblem written in the same style as the Marshall logo...

[@stewmac]

Ha Ha... I was just thinking about making one up with a 3D printer as a lark. :)

[@TempoDrift1480]

Ummm... No...

[@AlexRamosDrTaz]

Cool idea. I'd go with the early blocky lettering vs the usual cursive script for the JTM-45.

[@CosminNeagu]

I want more Dan and Eric

[@simonkormendy849]

The Marshall JTM45 is actually based on Fender's original 4X10 Tweed Bassman amp, Jim Marshall asked Ken Bran and Dudley Craven to design a new amplifier based on the Tweed Bassman, that would produce a sound that some guitarists who frequented Jim Marshall's shop, were talking about, the result was the original JTM45 amps from 1962.

[@elbowjames7625]

Designed by Jim Marshall? Ken Bran and Dudley Craven maybe.

[@brian9670]

Hey, that sounds like rock n roll!

[@jordanprysmiki5361]

I need it with one of those high voltage effects loops. Do you sell a chassis drilled for that with insturctions?

[@brentgilbert4208]

I had no idea you even OFFERED kits!!! Guess I'm late to the game!

[@rb032682]

I think StewMac just recently started offering amp kits. So, you're not really late.

[@_RLP]

Very, very cool, guys... And great sounds too. Cheers

[@COMANDR100]

WOW !!! Killer sound and Killer kit . There goes my money.

[@nycLPplayer]

What speakers and cab where used...sounds amazing

[@Hipsters_N_Hippies]

🤟🤘✊🤙👍 that about sums it up.

[@lousekoya1803]

Sounds great guys !!.....any plans on doing a JMP 2204 some day ?

[@joywolfe.]

lucky you!

[@creature1259]

Does This amp use KT-66 Power tubes?

[@bluesdriver6354]

Sounds AWESOME!!!

[@SDPickups]

EL34's were not used until 1966.

[@TheRitter]

gold on the celling !!!!!!

[@charlesshaw9090]

Hey! Free shipping to UK... Yeh, if you pay £30!! ?? How is that free?

[@11calman]

Your lucky mate, try sending it to Auckland NZ just about the same price as the amp

[@jessebeauchamp1484]

Does that come with a choke? Sounds like it needs one.

[@Broeseler]

You are sure its not the 19`BREXIT PL 45 W? 🤣 let´s get serious again: nice vid and amp...

[@firefist8511]

_Sure*_

[@gto1607]

I wish someone would make an SVT clone kit.

[@thegimpsometimes5937]

I second this

[@mutarerrs]

need some =C= power tubes and some NOS RCA preamp tubes and you'll be in good shape.

[@donvanco3078]

I think it's great that you guys put together these kits - but your price point is what killed them.

[@gerritburgel3048]

Steward Macdollars it is

[@charliemaddock3459]

Pretty cool 👏

[@addictedtogear]

How much?

[@gregormiller4037]

3 chickens, two goats, and a mule from Sister Sarah!

[@Hipsters_N_Hippies]

$999, however right now (05/09/2019) they are running with a $150 off coupon. So You can get it for $849. However I'm not sure about shipping cost. Or how long it will be on sale for the price of $849.

[@TempoDrift1480]

About $3-400 more than it is anywhere else. These are run of the mill kits available all over for half that price.

[@nerddujugement8334]

@@TempoDrift1480 where? I know there are cheaper kits, but with the head cabinet as well?

[@LIGHTintheHALLS]

Not hearing much if any bridge pickup sounds in this clip. The neck pickup with the bass up too high on a Marshall JTM45 can turn to a wooly mess. 🔊🧐

[@freepressright]

This, exactly!

[@AllTheTimeWasted]

240 volts. Please. It'll rock 218% more and pitch 20% higher

[@Chris66JTM45]

Sounds darker than my original (30w RMS) plexi with gold/white script logo and cream backplate, that runs KT66's in the power stage and a GZ34 rectifier ... are you using EL34's in this as they were not in use for the circa 62 - 66 era lower wattage plexis

[@danielcgomez]

I was just thinking the same thing. I built a DIY JTM45 a couple years ago and I went with the KT66 outputs.

[@danielwulf4241]

But for 88,8% of the price of a new genuine Marshall JTM45/2245 with 30 watts with 3 years warranty by Thomann! But if I would search for a fun electronic building project, this kit would be the thing to go.

[@akkudakkupl]

Not designed by Jim Marshall. Copied by his technican from a Fender Bassman, with some component changes to stuff that was available in GB.

[@omarzenteno6373]

How much it cost ready yo use and Sent to México? Thanks......

[@rb032682]

Cool stuff. Jim Marshall pretty much copied a 5F6A Fender Bassman circuit and used EL34s instead of 5881s for the output. And, Leo Fender mostly copied circuits from the RCA Tube Manual..........

[@alexchoquenina3032]

240 v?

[@bradt.3555]

Lag time? too funny, electrons move at like the speed of light.

[@jimallen9442]

No they don't, its about 1% of the speed of light freely moving, but along the length of a conductor it is measured in "drift speed" which is only a few meters per second.

[@solsinclair1909]

The only thing that moves at the speed of light in a vacuum is the speed of light. The speed of light is also the only thing I am aware of that has an inherent speed. Electron speeds are a product of the energy they recieve. Theoretically it can be 0m/s, it can be as slow as a few meters/s.

[@bradt.3555]

@@solsinclair1909 , ok, they move at about 2,200 meters per sec. it can vary depending on what they are moving thru pressure, etc. I think my point was in whatever I was responding to you weren't gonna hear it.

[@bradt.3555]

Sorry meant kilometers, still having morning coffee.

[@m9shamalan]

@@jimallen9442 a few meters per second??? id love to know the circumstances in which electricity does move that slowly, but it sure as hell isn't in a tube amp.

[@b.rodclark7349]

WOOOOW!!!

[@jpomorgan9818]

Where's the AB763 Deluxe reverb???

[@Jah_Rastafari_ORIG]

I need to know if my local supermarket stocks red bananas...

[@themessiah1004]

...and psychological self-diagnosis kits...

[@Jah_Rastafari_ORIG]

@@themessiah1004 Clear glass and metal are in bins next to the catbox whereas mixed paper/cardboard got shoved under the stairs, due to space concerns... oh, and Gesundheit.

[@jaydee177]

I owned one.

[@sgrocker1]

JTM-45 is 30 watts not 45.

[@MacPro8CoreMan]

Cool but for $1000.00 I can buy an EVH 5150 III EL34 and The 5150 can do anything the kit can do, plus at least 25 features you don't get with the kit. If this was $350 then it would be a value proposition.

[@luisownerbr]

Oh my god that's like my dream amp... Can I get one for free? Thanks in advance

[@mathewcormier5445]

felix o gaitero I don’t think it’s that easy, but if so I’ll take one too

[@mattrogers1946]

Just hold your breath until your free amp arrives in the mail Einstein.👍🙄🙄🙄🙄

[@luisownerbr]

@@mattrogers1946 dude you're so clever! Of course, they want to SELL the amp, not give it away for free! Thank you so much for shining some light on this subject since it wasn't a joke. After all this is stewmac's channel who are known for not wanting money at all.

[@smemetalhead]

+1 for the Ness Tat

[@marksalot655]

Was gonna buy, but CA prop WTF sez it’ll cauz brain damage. 🤣😎🙄

[@jgmopar]

Everything in Ca. we are the only State it seems.

[@egetamay6599]

Why did you use el-34's? The original jtm 45 had kt88 tubes inside

[@pleximanic]

The JTM 45 had KT66 valves "Early versions had used 6L6 or US 5881 valves But they were expensive and difficult to obtain , later models used KT66 which were mechanically fragile (from 1964), EL34 (from 1966)",The Marshall Major had KT 88 valves!

[@Chris66JTM45]

@@pleximanic spot on comment ... my '66 with Cream backplate still has one of it's original KT66 blue/white logo GEC's sitting alongside a similar era KT66 Pinnacle and Mazda GZ34 rectifier.

[@PoppysGuitar]

jimmy page 1969?

[@7siamesecat]

Business has no limit...

[@rjake61]

Modified Fender Bassman...

[@kebab_boi]

Bro lowkey look like Jimmy Page

[@freepressright]

You couldn't even give us a damn sampling of a bridge pickup? Lame

[@Ibaneddie76]

Now lets here it on 10 the way its supposed to be played. Turn down the bass a little.

[@gonzothompson8118]

Why does this guy look like jimmy page

[@michaelfriedlander750]

FYI It's not a British circuit at all. It's a Fender Bassman circuit that Marshall copied to make their first amps. So let's give credit where credit is due.

[@russellesimonetta3835]

Some changed values in caps in the preamp but it has a resister and cap as the first components in the phase inverter. clapton had the cap removed from circuit in the phase inverter that gave him the woman tone he was looking for. But the real difference came from the european tubes el34,s???and celestion speakers . That made it a different animal. But a basically direct copy. Vox directly copied exactly a gibson ga 12 or 15 for their first amps.

[@mikeault]

The first ones were made with KT- 66 tubes..@@russellesimonetta3835

[@oldtimetinfoilhatwearer]

@@russellesimonetta3835 Clapton didn't mod his Marshalls. He just cranked the 100w super leads on stage. Which came after the 62-66 Marshalls anyway.

[@russellesimonetta3835]

@@oldtimetinfoilhatwearer clapton left the yardbirds and went with mayall. His first marshall was a jtm 45. He went and checked them out and bought one. They were making about four or five a week and either clapton asked for more this and that or had a amp tech friend "fix it " for him. The lore around clapton is god thing was he lucked out and got a amp with a typo that made him famous. Clapton did,nt want to play VOX 15 watts and 30,s with mayall. He was searching for his tone. It was a clipped cap from resister pair in the start of the phase inverter section.

[@noel3422]

Fuzzy poo poo star price, lol.