I've gotten a ton of comments about the guitar used in the demo. It's my signature Zio Meteorite. Here are the details: www.zioguitars.com/shop/brad-linzy-the-guitologist-signature-meteorite
Brad has mad guitar skills. I have been watching his vids for years. My favorite part is when he finally gets them repaired and plays.Beautiful playing.
I have this exact amp in fawn tolex. I bought it from an older lady who had bought it for her son when he was 18 years old. He passed away about 10 years ago and she sold it to me. It literally looks brand new. He played it at church, believe that, or not. It has the original Marshall 4X12. It is all original including the speakers in the cab. No mods. It is a fire breather. Great to see you on here, brother!
I cannot believe I traded my 100 stack for a Les Paul Standard and some ca$h at Sol Betnum's (Anyone remember that HOUSE with its rooms filled with used music equipment?). But I was never able to play the thing anywhere besides my parent's home without the LAPD or US Marshal showing up within 30 minutes. No exaggeration. They once said, "We followed the sound for a mile to find you" I was using it outside, at my high school. Filled my mom's entire VW Squareback! Even had to scoot the driver's seat forward so I could close the back!
@@alecalfaras5936 I should.have the invoice somewhere but I believe it was about 1300 guilders, which equates to 1300/2.20 in todays euros, with inflation correction
I'm huge fan of the JCM800. To me that is the quintessential rock amp. I did buy a Freidman BE Deluxe which is basically the hot rodded modern JMP Plexi.
I know I'm not alone in saying your audience WOULD LOVE TO SEE MORE GUITAR PLAYING by you. Any time you play I'm sitting up, paying serious attention. Fantastic player.
My friend’s dad had one of these. He passed away a few years ago, and I just didn’t have the cash to buy it from his widow. I did help her sell it for her though. We had it gone over by a tech and they said it even still had the stock tubes. I think I got her a good price and the dude that bought it seemed very happy to find an unadulterated JMP.
Saved up for the 100 watt version of this when I was 19 in 1979. It was called the Master Volume. £10 a week for a year out of my £18 wage. Cost me £550 for this and the 1960 4x12.
In 1983 I bought one of these in a twin combo form in fawn color tolex(pretty rare). It was a 1977 model also. I paid $400 for it used for at Deitze music house in Lincoln, NE. I rocked it using a Tom Sholz power soak and we played 4 nights a week for 7 years. It never missed a lick, such a great amp it was. My biggest gigs were opening for the band Head East, also got to open for comedian Joe Piscopo, and the biggest was opening for Billy Squier at a outdoor Festival. Anyway I love this amp too. I sold it to my cousin around 1992 and he still has it today! I want it back, but he wont sell it. Nice job with this amp and also your playing on this one was awesome! Thanks Brad and take care!
I look at his bench, -he's got an oscilloscope. I look at my bench, I've got an oscilloscope. I look at his guitar, it's got strings. I look at my guitar, it's got strings. I look at what he does with the same tools and well, boy howdy! That's some good shit right there son! I'm not sure if the best part of these vids is listening and watching his mind work through the repair process or watching him test the finished products. Mad props buddy. I give this channel five shaved beavers. The highest rating possible! ;)
I fabricated brackets from duct hanging straps to hang a 120V 5" Boxer fan below the power tubes and transformer of my BF Fender combos. Slips over the lower rear panel, and plugs into the 2 prong convenience outlet. No screws/holes/velcro needed. Great video. Love that 80's style _G_ logo.
I noticed the amp was signed by Linda. Many years ago I read an interview with Dave Mustaine and Chris Poland from Megadeth and MegaDave said he would open up Marshalls and look for her name as it was sure to be a screamer. Looks like he wasn't full of shit! Love your vids and channel man, I'm from NC and have lived in Seattle for 20 years so it's nice to hear an intelligent southern accent.
So true that the fuse needs to be checked and never assume the existing fuse is correct. After working on a ‘63? Brown Tolex Fender Super back round 1992, got a call from the owner that instead of the fuse he found a rusty old nail 😮 Glad he checked it for whatever reason he did and afterwards I made it routine to check the fuses
F*** yeah! Good to see an upload Brad! You’re right, the 2204 is THEE amp from Marshall . Love them so much I’ve got 3 of them and each one sounds different . My 77 sounds modded , crazy high gain but if you look at the board, not a single mod.
I totally agree I had one when I was 17 then I sold it for an AC 30 because the quad box didn't fit in my car. I've been crying ever since. Can't believe I sold it.
What a great sounding amp!!! I really like your format, after the repair and learning all about the amp, you do a demo to let us hear it, great playing as well!
Very enjoyable episode. I have a 1982 2204 CSA Half Stack. Bought it off of an older gentleman in Hearst, Ontario. He played it twice ever ! Just sat in a spare room at his house for 40 years… original tubes obviously. Sounds incredible. So quiet at full volume idle. Dialed in perfectly from the factory 😁
I worked (as a drummer) with a guitarist in the late 80's who ran one of those with nothing more than a chorus in front. Just the best sound, and he was a stunning guitarist too. But that thing absolutely sang.
I had two 100w jmp heads for years, loved them. Quit playing for 20 years so they slipped away. Now playing dsl20 and happy for recording, has 2 el43s.
I have a 1974 Marshall jmp 100 watt all stock one pace owned by Gary Ritchrath (solo to roll with the changes done on it) love your channel Brad I learn a lot
My favorite amp, and i think that fan is the coolest That will save the tubes. I put fans in 2 of mine in the 80s, and the tubes lasted WAY longer.. Years longer- Welcome back, Brad. Missed you down here-
Agreed....that's a masterpiece of an amp you have there. And, the fact that Marshal had virtually ZERO consistency with parts, or quality, back then, makes a good one even more valuable. There are a few on Reverb I'd consider buying but no sound clips. With the prices they're asking, I don't feel comfortable, knowing that. I envy the guys that have one in good condition, though. Every hot-rodded rock-n-roll amp used that tone as its fundamental tone. Very cool video...thanks for sharing!
Definitely my favorite Marshall. Such a killer sounding amp! I think that’s the same model that Phil X uses that he calls his barbecue grill amp.. He has the grill of a barbecue on it instead of the front wood panel that says Marshall.
Got a B-52 AT100 (FREE)!! It runs pretty hot, so I got one of those thermoelectric fans for like $20. Put it on top with a little homemade duct, works great!
It sounds killer! He did a great job on that faceplate overlay. Making the controls go to eleven is perfect. I still love your custom made Meteora. Awesome guitar.
My first Marshall I bought was the JMP 100 Watt head in 1981 and a 4 x 12 matching cab. I gigged with it all through the 80s. Incredible amp. I still have the 1/2 stack today, but haven't as much as turned on the head for 30 plus years. It's all original. Wonder what it would cost to get it back to working order?
I always needed to raise half-stacks at least 2 ft from the floor to get the feedback interaction I was using. Most of the time I used the full stack, but the "noise" complaints were perpetual. "A frustrating MESS"
Maybe not your favorite type of videos to do but, as a fan and student for 6+ years, I'm pleased to see you back to showing us how to repair and troubleshoot. Great hearing you play some too. As your reward, I WON'T send you my Mesa Boogie Mkii-b to fix... lol (caps finally dried out after 40 years).
Even after enjoying your repair videos for years, I don't trust my skill level. I'll take it to someone listed on Mesa's website and pay for someone to blame. ;)
I really enjoyed this video! I have two 1979 100-watt JMPs with the 6550s and it is hands down my favorite. I think I fell in love with these heads in my early 20s when it was the first Marshall I was able to buy (used). Mine are both modded with an effects loop and some preamp tweaks so I’ve probably hurt the collectibility, but so be it. You’ll pry my two JMPs from my cold dead hands! I would love to learn how to bias my amp some day.
I’ve been a tech in New York since 1988 and couldn’t agree more. This is Marshall’s masterpiece. The Blag Flag Marshall also comes to mind and also love the small box 50w plexi’s
Dig the red guitar strap. Marshall really makes great sounding amps... personally, I bought a Katana Artist Mk2 head. Bad power avoidance with solid state. Cool bass too.
Had one in the 80s when I was 14. Never liked it for months until some guy at music shop just casually popped a new v1 in and whoosh! That's how it should have sounded all along lol! Cant afford one now of course 😢😢
Hey Brad is that a 1977 model? I have a '77 and it has those same green caps they used for a couple of years. Also has the lower voltage power tranny like mine. Very cool video. I biased mine with my oscilloscope last year and just left a tad bit of crossover distortion there as per Lee Jackson. Since the Plate voltage was relatively low I raised my preamp voltages up to around 325vdc at the PI node by lowering the big 10 K dropping resistor to 5K, the sweet spot as per Jason at headfirst. A good place to start on the preamp gain is about 6 or 7 on these although at lower volumes I go a little higher without getting woofy. Rock ON Man!
It is a 77, yes. I've heard of people playing around with the node voltages before. Never felt a need to do that personally, but not saying great results can't be achieved. For some of the sound tests, I was cranking the Master and doing the Gain on about 3 or 4. On other tests, the Gain was nearly cranked with the Master at 7.
That was awesome man! Hate l missed all but the last 10min of the live premier... Hey l got a project goin. It's a 1963 Silvertone 1482 combo. The particle board cab was beyond shot. So I've de-comboed it and just made a nice little head out of it. Any possumability of doing a video on one of those sometime? They're killer sounding little amps!
@@TheGuitologist Man that would be AWESOME if you'd tackle that next! I didn't like that zig-zag, vertical control layout. So l drilled out the panel and layed them out in a straight line. Then l made a thin aluminum cover plate and riveted it to the front to cover all the old holes. Looks great. But l gotta figure out a practical way to print new graphics one the control panel. Without breaking the bank... If you do that one next, I'll be so stoked! I'll give you my first born son. He ain't worth a shit. But you can take him. Please!
I had one of these in England about 1980. One of my friends was playing rock covers in a bar band with the one and only John Sykes. JS collected Marshalls and asked me if I wanted to sell it. I refused and obviously wasn’t aware what of how great he would become. He was a beast then.
My favorites are my early 70's Marshall metal panel Superleads. I upgraded some capacitors, wires, added star grounding and post phase inverter master volume to all of them. 100 and 50 watt tone heaven from every one! Most all were bought in the 90's for $500.00 a head!!
It’s super clean for a 79’ so idk if the fan would be a problem unless it caused interference with the tubes… but nowadays like I do you can get everything you need for under 20 bucks to make a killer fan that can set on the chassis inside assuming ur amp allows it. I wired two gaming computer fans with a speed controller for each and a dc power supply in a plastic box so I can run it on any amp I have. Better safe than sorry😊
The JMP was my first Marshall ever ..Loved it until it was stolen ..My tubes ran so hot that there were burn indentations in the back plate ..used the box fan blowing right in the back to "fix" the problem..Awesome amp
I came by one of these recently. I got it out sometime later in my studio to see what all the praise was about...This is a scary amplifier! The first thing that smacks you is the perceived loudness - it is cartoon scale loudness - and then you hear what I can only term as "The Archetypal Marshall Sound". Rock Power.
The heart of Jimi's sound was VOLUME even before he went to England. He was using Fender Twin Reverbs opened 8-10 before then. That is why no distortion unit an "replicate" his sound. Much of the time he by-passed stomp-boxes, but it sounds like he has an effect on. The "mystery effect unit" was AMP VOLUME! LMAO
I like the mods this person did to that amp. Had a JMP Super Lead when I young. The only way I could sounds like that was with a Tube Scream, If I did not want to knock a building down.
I love this video here, Thanks, I really got A Kick of you playing all of the Instruments, Are you Paul McCartney's Relative? LOL, This is what Paul did on his first solo album after the Beatles, Rock on Brother, Cousin Figel
Couple of mods I noticed - cathode bypass cap on the second preamp stage (maybe a resistor change too?), and 330k plate resistor on the third preamps stage. Both would pump up the gain a bit
I spotted the 330k plate resistor as well. This looks like the original design of the 2204 that was in production for less than two years. It’s an entirely different animal from the cascaded cold clipper.
Seems to me that a lot of the rockers from the 70's seemed to really like the 1959. The problem with that amp is the loudness lol. I'd have to agree that this has the best of the 1959 into JCM 800. At 50 watts it's much more viable for a bedroom to gigging guitarist. I've never seen someone "Lube" a pot before...would you recommend doing that after cleaning?
I used a JMP hundred watter for years in my band, no distortion pedal ever, 2 1/2 on the volume, EQ, delay, wah wah, that’s about it. Marshall cab. Favorite clean sound ever but badass thump too.
Woooo!! I have this exact same amp! (well, 100 watt anyway)! Mine's a 79, unmolested except for a replacement power cord. I couldn't agree more, these are the best Marshall ever made. Friends who own Bogners, VHT, Mesa, etc have borrowed my amp for recording. Interestingly, my 100 watter has an output transformer like twice the size of this 50 watter. It's absolutely MASSIVE, with the low end that comes with a larger OT. They'll have to bury me with this amp 😁 Sweet jams at the end too BTW!!
I've gotten a ton of comments about the guitar used in the demo. It's my signature Zio Meteorite. Here are the details: www.zioguitars.com/shop/brad-linzy-the-guitologist-signature-meteorite
Wow. You’ve got great taste. I’ve been looking for a Meteora with Jazzmaster appointments!
Brad has mad guitar skills. I have been watching his vids for years. My favorite part is when he finally gets them repaired and plays.Beautiful playing.
I have this exact amp in fawn tolex. I bought it from an older lady who had bought it for her son when he was 18 years old. He passed away about 10 years ago and she sold it to me. It literally looks brand new. He played it at church, believe that, or not. It has the original Marshall 4X12. It is all original including the speakers in the cab. No mods. It is a fire breather.
Great to see you on here, brother!
Hey Brad!. Good to see you back in action with guitar stuff!
Absolutely superb playing and musicianship at the end Brad. I got completely lost in it. I’ll listen to it again going in to work tomorrow.
Glad you enjoyed it. I could have stood to do some parts over, but eh, it's a demo video. Who cares?
at the beginning too! :)
My first amp. Bought it in 1980 when I was 16. Still have it to this day. Completely stock. Also have the same as a combo. Great amps
I cannot believe I traded my 100 stack for a Les Paul Standard and some ca$h at Sol Betnum's (Anyone remember that HOUSE with its rooms filled with used music equipment?). But I was never able to play the thing anywhere besides my parent's home without the LAPD or US Marshal showing up within 30 minutes. No exaggeration. They once said, "We followed the sound for a mile to find you" I was using it outside, at my high school. Filled my mom's entire VW Squareback! Even had to scoot the driver's seat forward so I could close the back!
OP Boomers
@@Valentine98766maybe when you grow up you will appreciate how a great guitar tune amp sounds
@@Johnsormanihow much did you pay in 1980?
@@alecalfaras5936 I should.have the invoice somewhere but I believe it was about 1300 guilders, which equates to 1300/2.20 in todays euros, with inflation correction
Marshall JMP 2204 50w Master Volume 👍
I'm huge fan of the JCM800. To me that is the quintessential rock amp. I did buy a Freidman BE Deluxe which is basically the hot rodded modern JMP Plexi.
I know I'm not alone in saying your audience WOULD LOVE TO SEE MORE GUITAR PLAYING by you.
Any time you play I'm sitting up, paying serious attention.
Fantastic player.
Really!?!
@@dragonpundit.6443
Yeah
I mean what are you doing?
Are you here as a troll?
Do you actually think you can deal with me?
My friend’s dad had one of these. He passed away a few years ago, and I just didn’t have the cash to buy it from his widow. I did help her sell it for her though. We had it gone over by a tech and they said it even still had the stock tubes. I think I got her a good price and the dude that bought it seemed very happy to find an unadulterated JMP.
Watching to see some of the best amp info ever, but also - the shredding is badass & inspiring! Thank you!
Saved up for the 100 watt version of this when I was 19 in 1979. It was called the Master Volume. £10 a week for a year out of my £18 wage. Cost me £550 for this and the 1960 4x12.
That's one of MANY I stupidly let go many years back...nice to see ya rockin' the gear again
In 1983 I bought one of these in a twin combo form in fawn color tolex(pretty rare). It was a 1977 model also. I paid $400 for it used for at Deitze music house in Lincoln, NE. I rocked it using a Tom Sholz power soak and we played 4 nights a week for 7 years. It never missed a lick, such a great amp it was. My biggest gigs were opening for the band Head East, also got to open for comedian Joe Piscopo, and the biggest was opening for Billy Squier at a outdoor Festival. Anyway I love this amp too. I sold it to my cousin around 1992 and he still has it today! I want it back, but he wont sell it. Nice job with this amp and also your playing on this one was awesome! Thanks Brad and take care!
Always a pleasure to watch a master at work.
I look at his bench, -he's got an oscilloscope. I look at my bench, I've got an oscilloscope. I look at his guitar, it's got strings. I look at my guitar, it's got strings. I look at what he does with the same tools and well, boy howdy! That's some good shit right there son! I'm not sure if the best part of these vids is listening and watching his mind work through the repair process or watching him test the finished products. Mad props buddy. I give this channel five shaved beavers. The highest rating possible! ;)
He's alive... HE'S ALIVE!!! HAHAHA!
Great video and we missed ya! These repair and demo videos are really good for my soul, so I really appreciate them.
I fabricated brackets from duct hanging straps to hang a 120V 5" Boxer fan below the power tubes and transformer of my BF Fender combos. Slips over the lower rear panel, and plugs into the 2 prong convenience outlet. No screws/holes/velcro needed. Great video. Love that 80's style _G_ logo.
You’re enjoying yourself just a bit too much Brad. Nice to see you back at your best!
Brad, I can tell you are really enjoying the sound of this amp!
Dude, glad to hear your voice again. Glad you are back. Jammin on the guitar, Bass and Drums. Keep jammin man, it’s good for the soul.
I noticed the amp was signed by Linda. Many years ago I read an interview with Dave Mustaine and Chris Poland from Megadeth and MegaDave said he would open up Marshalls and look for her name as it was sure to be a screamer. Looks like he wasn't full of shit!
Love your vids and channel man, I'm from NC and have lived in Seattle for 20 years so it's nice to hear an intelligent southern accent.
I remember that now you mention it.
So I'm not the only one! My friends from back then all think I'm full of shit. And I get a pin, hahaha!
Thx for sharing that info. I am such a gear nerd heh.
what about Carol, I saw that name, too, on the PCB!
Great to see you again Brad !
All the Best to you and yours.
So true that the fuse needs to be checked and never assume the existing fuse is correct.
After working on a ‘63? Brown Tolex Fender Super back round 1992, got a call from the owner that instead of the fuse he found a rusty old nail 😮
Glad he checked it for whatever reason he did and afterwards I made it routine to check the fuses
I like hearing you play. The samples at the end really made the video. I know it was to demonstrate the amp, but the samples are good.
F*** yeah! Good to see an upload Brad! You’re right, the 2204 is THEE amp from Marshall . Love them so much I’ve got 3 of them and each one sounds different . My 77 sounds modded , crazy high gain but if you look at the board, not a single mod.
You might have some strong tubes and a cold bias. Cold bias will break up faster.
I totally agree I had one when I was 17 then I sold it for an AC 30 because the quad box didn't fit in my car. I've been crying ever since. Can't believe I sold it.
What a great sounding amp!!! I really like your format, after the repair and learning all about the amp, you do a demo to let us hear it, great playing as well!
Very enjoyable episode. I have a 1982 2204 CSA Half Stack. Bought it off of an older gentleman in Hearst, Ontario. He played it twice ever ! Just sat in a spare room at his house for 40 years… original tubes obviously. Sounds incredible. So quiet at full volume idle. Dialed in perfectly from the factory 😁
I worked (as a drummer) with a guitarist in the late 80's who ran one of those with nothing more than a chorus in front. Just the best sound, and he was a stunning guitarist too. But that thing absolutely sang.
You came back to us!
We need more new videos!
I didnt realize how much I missed these videos of yours
I had two 100w jmp heads for years, loved them. Quit playing for 20 years so they slipped away. Now playing dsl20 and happy for recording, has 2 el43s.
And it’s great to see you back in action.
I have a 1974 Marshall jmp 100 watt all stock one pace owned by Gary Ritchrath (solo to roll with the changes done on it) love your channel Brad I learn a lot
In 1978 I played in a band that used two of these amps with a full stack for each guitar. Yup. Very good demo of the amp!
My favorite amp, and i think that fan is the coolest
That will save the tubes.
I put fans in 2 of mine in the 80s, and the tubes lasted WAY longer..
Years longer-
Welcome back, Brad.
Missed you down here-
Agreed....that's a masterpiece of an amp you have there. And, the fact that Marshal had virtually ZERO consistency with parts, or quality, back then, makes a good one even more valuable. There are a few on Reverb I'd consider buying but no sound clips. With the prices they're asking, I don't feel comfortable, knowing that. I envy the guys that have one in good condition, though. Every hot-rodded rock-n-roll amp used that tone as its fundamental tone. Very cool video...thanks for sharing!
Dude this is my absolute favorite new channel. And by that I mean new to me. No bullshit, just straight forward information. Rock on brother 🎸
I have used Marshalls exclusively since I was a teenager and this is a great sounding Marshall that just needs some tlc. Great video and playing. ✌🏻
You're a good dude, Brad. Thanks for being such a great source of information.
Good to see you back, man.
Also...the three Brad thing was pretty cool.
Definitely my favorite Marshall. Such a killer sounding amp! I think that’s the same model that Phil X uses that he calls his barbecue grill amp.. He has the grill of a barbecue on it instead of the front wood panel that says Marshall.
greatest marshall ever made? you've obviously never tried a 68 lay down tranny plexi super bass
Got a B-52 AT100 (FREE)!! It runs pretty hot, so I got one of those thermoelectric fans for like $20. Put it on top with a little homemade duct, works great!
Nice..we need to get together and have a jam session soon
It sounds killer! He did a great job on that faceplate overlay. Making the controls go to eleven is perfect. I still love your custom made Meteora. Awesome guitar.
Your playing gets better over the years my friend !
I own a 77 2204. Converted back to EL34. Love it
Glad to see you back and in action. And to my ears and eyes, doing great.
I am most pleased my brother B.
My first Marshall I bought was the JMP 100 Watt head in 1981 and a 4 x 12 matching cab. I gigged with it all through the 80s. Incredible amp. I still have the 1/2 stack today, but haven't as much as turned on the head for 30 plus years. It's all original. Wonder what it would cost to get it back to working order?
I always needed to raise half-stacks at least 2 ft from the floor to get the feedback interaction I was using. Most of the time I used the full stack, but the "noise" complaints were perpetual. "A frustrating MESS"
Great to see you back at the bench Brad. take care.
Maybe not your favorite type of videos to do but, as a fan and student for 6+ years, I'm pleased to see you back to showing us how to repair and troubleshoot. Great hearing you play some too. As your reward, I WON'T send you my Mesa Boogie Mkii-b to fix... lol (caps finally dried out after 40 years).
Try reforming them?
Even after enjoying your repair videos for years, I don't trust my skill level. I'll take it to someone listed on Mesa's website and pay for someone to blame. ;)
I wasn't around during the live when our shirt popped up! Thanks for wearing it dude! Great video as always!!
Thanks for sending it in.
I really enjoyed this video! I have two 1979 100-watt JMPs with the 6550s and it is hands down my favorite. I think I fell in love with these heads in my early 20s when it was the first Marshall I was able to buy (used). Mine are both modded with an effects loop and some preamp tweaks so I’ve probably hurt the collectibility, but so be it. You’ll pry my two JMPs from my cold dead hands! I would love to learn how to bias my amp some day.
My first Marshall. Got it in Manchester UK 1981. I saved up the money from a part-time job and my Dad put in the rest. Wish I still had it.😁
I have the same amp same year and I always say wind this amp up and hit one chord and it's instant AC/DC....Great video Brad!
Right on!
You can definitely hear the start / birth of the JCM800 in this amp. Brilliant video and playing, Brad!
It's cool that everyone in your band has matching beards and tee shirts
Classic Brad, we need rundown videos like these whenever you can
Classic Guitologist... I love these videos
I have this but 100 watt. 78 or 79 model. Had it since 1992. Greatest amp I've heard for rock!
I’ve been a tech in New York since 1988 and couldn’t agree more. This is Marshall’s masterpiece. The Blag Flag Marshall also comes to mind and also love the small box 50w plexi’s
Dig the red guitar strap. Marshall really makes great sounding amps... personally, I bought a Katana Artist Mk2 head. Bad power avoidance with solid state. Cool bass too.
Had one in the 80s when I was 14. Never liked it for months until some guy at music shop just casually popped a new v1 in and whoosh! That's how it should have sounded all along lol! Cant afford one now of course 😢😢
Hey Brad is that a 1977 model? I have a '77 and it has those same green caps they used for a couple of years. Also has the lower voltage power tranny like mine. Very cool video. I biased mine with my oscilloscope last year and just left a tad bit of crossover distortion there as per Lee Jackson. Since the Plate voltage was relatively low I raised my preamp voltages up to around 325vdc at the PI node by lowering the big 10 K dropping resistor to 5K, the sweet spot as per Jason at headfirst. A good place to start on the preamp gain is about 6 or 7 on these although at lower volumes I go a little higher without getting woofy. Rock ON Man!
It is a 77, yes. I've heard of people playing around with the node voltages before. Never felt a need to do that personally, but not saying great results can't be achieved. For some of the sound tests, I was cranking the Master and doing the Gain on about 3 or 4. On other tests, the Gain was nearly cranked with the Master at 7.
Awesome 👏 the jams towards the end of the video gave off Cream vibes. 👍
That was awesome man! Hate l missed all but the last 10min of the live premier...
Hey l got a project goin. It's a 1963 Silvertone 1482 combo. The particle board cab was beyond shot. So I've de-comboed it and just made a nice little head out of it. Any possumability of doing a video on one of those sometime? They're killer sounding little amps!
I have one to restore on my shelf.
@@TheGuitologist Man that would be AWESOME if you'd tackle that next! I didn't like that zig-zag, vertical control layout. So l drilled out the panel and layed them out in a straight line. Then l made a thin aluminum cover plate and riveted it to the front to cover all the old holes. Looks great. But l gotta figure out a practical way to print new graphics one the control panel. Without breaking the bank...
If you do that one next, I'll be so stoked! I'll give you my first born son.
He ain't worth a shit. But you can take him.
Please!
I had one of these in England about 1980. One of my friends was playing rock covers in a bar band with the one and only John Sykes. JS collected Marshalls and asked me if I wanted to sell it. I refused and obviously wasn’t aware what of how great he would become. He was a beast then.
DUDE. The house band ROCKS. Diggin the jam session with yourself. You should call the band Me, Myself and I.
Tres Hombres 😃
Both excellent suggestions.
How about The Three A-ME-Gos
@@TheGuitologist oh that’s a good one too. 😂🤘🏼
@@TheGuitologist haha! Yes very catchy 🤘!!
Missed the amp repair stuff. That was my favorite stuff on TH-cam
Great playing and production at the end, those drums sound awesome!
Thanks for listening
Good to see you Brad. Hope all is well
A classic Marshall, electronic knowledgment and a great musical performance, very nice!
Damn, I would absolutely gig that amp.
You, me, and about a million other guitarists! This thing is the business.
Brad, great to see you! 💚🎸
My favorites are my early 70's Marshall metal panel Superleads. I upgraded some capacitors, wires, added star grounding and post phase inverter master volume to all of them. 100 and 50 watt tone heaven from every one! Most all were bought in the 90's for $500.00 a head!!
thanks for the upload Brad and best wishes from Columbus Ohio USA 👍
It’s super clean for a 79’ so idk if the fan would be a problem unless it caused interference with the tubes… but nowadays like I do you can get everything you need for under 20 bucks to make a killer fan that can set on the chassis inside assuming ur amp allows it. I wired two gaming computer fans with a speed controller for each and a dc power supply in a plastic box so I can run it on any amp I have. Better safe than sorry😊
The JMP was my first Marshall ever ..Loved it until it was stolen ..My tubes ran so hot that there were burn indentations in the back plate ..used the box fan blowing right in the back to "fix" the problem..Awesome amp
Taking care of the vintage, nice.
I came by one of these recently. I got it out sometime later in my studio to see what all the praise was about...This is a scary amplifier! The first thing that smacks you is the perceived loudness - it is cartoon scale loudness - and then you hear what I can only term as "The Archetypal Marshall Sound". Rock Power.
The heart of Jimi's sound was VOLUME even before he went to England. He was using Fender Twin Reverbs opened 8-10 before then. That is why no distortion unit an "replicate" his sound. Much of the time he by-passed stomp-boxes, but it sounds like he has an effect on. The "mystery effect unit" was AMP VOLUME! LMAO
This is my Amp, fantastic resource video, thanks fella!
Right on Dude, glad to have you back. As always. That last little jam was particularly cool. I could see that in a movie somewhere.
I like the mods this person did to that amp. Had a JMP Super Lead when I young. The only way I could sounds like that was with a Tube Scream, If I did not want to knock a building down.
I love this video here, Thanks, I really got A Kick of you playing all of the Instruments, Are you Paul McCartney's Relative? LOL, This is what Paul did on his first solo album after the Beatles, Rock on Brother, Cousin Figel
Couple of mods I noticed - cathode bypass cap on the second preamp stage (maybe a resistor change too?), and 330k plate resistor on the third preamps stage. Both would pump up the gain a bit
I spotted the 330k plate resistor as well. This looks like the original design of the 2204 that was in production for less than two years. It’s an entirely different animal from the cascaded cold clipper.
Seems to me that a lot of the rockers from the 70's seemed to really like the 1959. The problem with that amp is the loudness lol. I'd have to agree that this has the best of the 1959 into JCM 800. At 50 watts it's much more viable for a bedroom to gigging guitarist. I've never seen someone "Lube" a pot before...would you recommend doing that after cleaning?
Learned new way to bias an amp and got to listen to some really cool music. Thanks!
Great to see you Brad!
That bit with the lead at around 33 minutes was the bee's knees, Daddy-O. Very tasty. (It was all good, but that was especially tasty.)
Awesome video Brad . Very informative and entertaining .
Thank You for showing me so much, as well as the correct way to bias a 50watt Marshall. Great playing.
I just built one. A clone of that amp. Except I used EL34’s. Excellent video. I’ll scope the output and try that crossover distortion test.
Yeah man, play around with it and do some sound tests at various levels of crossover. I might do that myself in a video sometime.
Man that guitar stuns me every time.
When is the Guitologist-on-all-tracks self-titled album? You've got some cool stuff going on there dude!
Thanks Wayne. Nice of you to say.
I used a JMP hundred watter for years in my band, no distortion pedal ever, 2 1/2 on the volume, EQ, delay, wah wah, that’s about it.
Marshall cab. Favorite clean sound ever but badass thump too.
Woooo!! I have this exact same amp! (well, 100 watt anyway)! Mine's a 79, unmolested except for a replacement power cord. I couldn't agree more, these are the best Marshall ever made. Friends who own Bogners, VHT, Mesa, etc have borrowed my amp for recording. Interestingly, my 100 watter has an output transformer like twice the size of this 50 watter. It's absolutely MASSIVE, with the low end that comes with a larger OT. They'll have to bury me with this amp 😁
Sweet jams at the end too BTW!!
Another wonderful video! Thanks, Brad!
You are absolutely right, what a tone