Too Many Watts? | Five Watt World GA-40 Pt 1

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Psionic Audio

Psionic Audio

Күн бұрын

Пікірлер: 146
@fivewattworld
@fivewattworld 4 ай бұрын
Love the video! And yes, just what I asked for. My main combo amp. Love the “swampy” bias tremolo on this thing. I built it after reading that Grissom used one on his first solo record.
@socallars3748
@socallars3748 4 ай бұрын
All things considered, you did a good job! Nice little amp which made for a great instructional video.
@gerardoromano3436
@gerardoromano3436 4 ай бұрын
Hi Keith, love your channel, I´m a tech myself, I think you did a nice job, not being a tech, when you built that amp. I assume you´re not a tech....That amp has nothing terrible and It´s not going yo catch on fire anytime soon, the few loose nuts is part of the use and lack off mantainance, that´s what we techs are for. Again you did a great job with that build.
@AnyMajorDude-et2ub
@AnyMajorDude-et2ub 4 ай бұрын
Hey Keith, good to see you take professional criticism so well. Lyle is in his best form when savage ... He's the Drill Sergeant of the amp world. So drop and do 50 Keith! 😆
@richclayton5785
@richclayton5785 4 ай бұрын
Like your channel. Glad you’re man enough to have a real tech like Lyle evaluate your work. What an opportunity he’s in demand. Like you all the more now.
@JeffMcErlain
@JeffMcErlain 4 ай бұрын
What a mess Keith... 😉
@willmcbride4435
@willmcbride4435 4 ай бұрын
Likely, most of us watching are hobbyists, and you pointed out really typical issues and level-of-skill results that I see in my own work. It’s hard to get perfect results when you do one amp every other year. Keith has done us all a favor by offering up his own to help us all improve. Bravo to you both!
@BXGuitars
@BXGuitars 4 ай бұрын
"He loves doing things he's not an expert in" You just described me every time I pick up a guitar. 😆
@goodun2974
@goodun2974 4 ай бұрын
People who are genuinely curious and interested in learning are rarely offended by constructive criticism. I don't think Keith will have any problem with your assessment.
@kevinfarrellUK
@kevinfarrellUK 4 ай бұрын
Honesty is best policy, especially between friends. It is not what you say, it is how you say it. If that was my build I would be hugely grateful and happy with everything you said. Top man. :))
@demesisx
@demesisx 4 ай бұрын
I love your work. Thanks so much for being such an amazing source of great information. You are one of the best. Thank you! Also, thanks for speaking up about Adobe being a bunch of monopolists! SCREW ADOBE!
@billklement2492
@billklement2492 4 ай бұрын
Looks like Keith did a pretty nice job! Certainly there were a few issues, but it's been working well for 12 years. Thanks for the critique. It shows where folks that don't solder for a living can so better. Also, really good points about using bolts of heavy components for grounds or attachment points. Thanks for the video!
@socallars3748
@socallars3748 4 ай бұрын
Nicely done Lyle, with just the right amount of brutality! All things considered, I think Keith did alright for a first build and he's fortunate to have you point out his errors. I'd be embarrassed to show you my first build! My subsequent work has gradually improved, thanks to guys like you, Brad and Frank.
@tedc6694
@tedc6694 4 ай бұрын
Very cool. Love it when Simon and Simon goes on holiday and shows up on Magnum P.I.
@vanguard9067
@vanguard9067 4 ай бұрын
Great you guys have a good (and trusting) friendship. I’ve watched your shows together and really enjoyed them.
@turkeeg7644
@turkeeg7644 4 ай бұрын
Critique and learning and instruction is not savaging someone. I had a teacher who told me things I needed to hear who was offering his hard earned knowledge with me. I was resistant felt slighted and he told me if I wanted to be a hack keep going I was doing great. lol😅.... I shut up and learned so many great things that I have been able to share with others. I also learned to check my ego but also to stand up for myself when someone was being disrespectful. To learn the difference . Thank you for sharing your hard earned knowledge.
@chipsterb4946
@chipsterb4946 4 ай бұрын
It is more than a bit sad that Lyle had to emphasize repeatedly that he did not intend to “savage” Keith. Saying that they are friends should be enough, but it’s not in today’s world. Dispassionately explaining why this is unsafe and here’s how to fix it is constructive criticism, not savagery. Overall I thought Keith’s build looked pretty darn good - especially if it was his first foray into amp building. I’ve re-built my first amp attempt twice already and it needs another gut and start over.
@wailinfree7350
@wailinfree7350 4 ай бұрын
Great job as always I'm impressed how thorough you are and your knowledge I'm sure Keith will appreciate what you do It's all about learning Thanks so much for sharing your knowledge over the years
@sseltrek1a2b
@sseltrek1a2b 4 ай бұрын
this is so fascinating (and i know nothing about the electronics of an amplifier...)...helps me to appreciate people who have the knowledge to work on our gear...
@MarcCarriage121
@MarcCarriage121 Ай бұрын
Been watching Keith Williams for a while now . He is or seems like a nice guy. His videos are very informative. 🎸😎
@martinreid1740
@martinreid1740 4 ай бұрын
I realIy enjoy five watt worldand it's nice to see your honest opinions. Looking forward to hearing it when you've finished it
@JeffBurkholder456
@JeffBurkholder456 4 ай бұрын
Lyle you are the man. I found you through Keith and I think you add so much to my universe of poorly understood amp building
@ditchgator1
@ditchgator1 4 ай бұрын
If'n I was Keith, I'd be dish'n out "Thanks Man" for any and all tips, fixes etc...😁 And pretty sure he does/will 😉👍 Think the end product is gonna be an eye opener 😃 Great video and looking forward to the next vid(s)...!!!👍👍
@shakeypeet
@shakeypeet 4 ай бұрын
Morning Lyle . I have learned in my personal builds , That attention to detail is everything ......Cheers
@weschilton
@weschilton 4 ай бұрын
I love these videos... the wealth of knowledge from your experience is incredible.
@LarsonGuitarPlayer
@LarsonGuitarPlayer 4 ай бұрын
I've started taking notes when I watch these videos. This had some good advice about grounding. Can't wait for the follow up on this.
@reverb508
@reverb508 4 ай бұрын
Great video! I'm sure Keith is taking copious notes! P.S. 9:23 - Matt Silvernut is my Chippendales stage name
@audunrundberg9180
@audunrundberg9180 4 ай бұрын
HAH
@GRequinBlanc
@GRequinBlanc Ай бұрын
So mean! lol. Keith is such a prince of a man he will really appreciate your work
@richclayton5785
@richclayton5785 4 ай бұрын
“Remonstrance” great word!
@goodun2974
@goodun2974 4 ай бұрын
If someone is building a kit, or cloning an amp, and has limited soldering experience, I would strongly suggest that they pre-tin all sockets, terminal strips, input/output connectors, and potentiometer lugs with solder. Any connection such as a wire or component lead to a terminal that will require a tricky reach into the chassis with solder and iron is a good candidate for pre-tinning; it will make life much easier as a beginning builder. Wires insulated with soft plastic such as the green heater wires shown here are a particular problem for newbies because traces of the melted insulation, or perhaps something it outgasses when heated, reject and seem to almost repel solder (and melted insulation will badly foul your soldering iron tip as well). When you're working in a really tight spot, especially a vertical chassis like the old tweed amps used, soldering to pots and sockets that are already mounted in place inside the chassis can be tricky to solder reliably, and visual inspection doesn't easily reveal any flaws. If you tin the parts with solder before you assemble them inside the chassis you will have a much easier time of it. ( This goes double if you're using new old stock parts that may have a layer of oxidation, and/or a greasy film, from 30, 40, 50, 60 years of storage. Clean them first ---- scratch brush, wire brush, scotchbrite pad, whatever ---- and pre-tin before installation. You'll be glad you did.
@misterknightowlandco
@misterknightowlandco 4 ай бұрын
For someone who built this for fun as a hobby, it’s pretty good. The wiring was fairly clean and I’ve seen worse solder jobs. Like he said, if it was someone claiming to be a pro and trying to take money from people then you bust their greedy corporate balls over every detail. This is just showing a friend how to do something. Cool amp!
@markGrimm-t2g
@markGrimm-t2g 4 ай бұрын
wow i think its great to share i have learnd alot of corrections for my amp builds and a big thanks for keith for letting you do this its correction not rejection its how we all learn thanks so much
@jonnybeck6723
@jonnybeck6723 4 ай бұрын
Thanx Teach... Lookin' forward to seein' this here clone get all dolled up!
@goodun2974
@goodun2974 4 ай бұрын
I grew up in an era where you could buy and build electronic devices from kits sold by Knight, Eico, Heath and others; but what we have here is a Keith-kit !😁 If he is planning to keep this amplifier then he should make a new badge for the front that proudly proclaims *Keith-Kit*!
@cee128d
@cee128d 4 ай бұрын
I grew up then as well. I built a lot of kits over the years. Todays kids have no idea what they are missing.
@fivewattworld
@fivewattworld 4 ай бұрын
Ha! This was designed by a very close friend of mine, who indulged me wanting to build a better than they ever were clone of a GA40. All credit would need to go to him…all blame to me. 😊
@goodun2974
@goodun2974 4 ай бұрын
@@fivewattworld , You built this 12 years ago and I think it's a safe bet that you've learned a few things about electronics and soldering since then!
@markmcdonald5711
@markmcdonald5711 4 ай бұрын
@@cee128d Dynaco and Patco, early 70's stereo amps.
@joshuagibson2520
@joshuagibson2520 4 ай бұрын
Dynaco preamp kits.
@stuarthossack7906
@stuarthossack7906 4 ай бұрын
Very enjoyable video. Done with respect and forensic attention to detail, I think you struck the balance just right. Love from UK.
@pauldavis6356
@pauldavis6356 4 ай бұрын
Just an observation - @ 5:35 the brown & black power wires and the yellow twisted pair appear, at least in that camera angle, to be right in the way of the bolt that would anchor the chasis to the cabinet. Looks like they could come in contact with that bolt an erode the plastic over time. Just a thought.
@jimsalman7257
@jimsalman7257 4 ай бұрын
"Closer to Flush": A big 1980s hit song by the Indy-go Girrls.
@thehaughtcorner
@thehaughtcorner 4 ай бұрын
I've been a subscriber for a few months, and videos like this one are the most helpful to me, because they remind me of the limits of my knowledge and ability to repair amps and guitars. I've learned a lot and raised my game a lot from watching your stuff, and I pick up little things that aid my understanding and help me see what I'm capable of and what I should leave to others until I have more experience. I know so much more now about what I'm looking at, and what to look for. I may not be ready to do, say, a cap job yet, but I'm getting there, and all the little things you point out that even *I* can do make my amps better, and playing more enjoyable. I'm grateful for that.
@J.C...
@J.C... 4 ай бұрын
Same. And now I really pay attention since I just got a new Fender amp. One that shows up on this channel quite a bit...a Hot Rod Deluxe. Funny how that works. I used to watch mainly for entertainment. Now I find myself actually listening intently 😂
@user-mv5bu2kk8b
@user-mv5bu2kk8b Ай бұрын
Good and very fair evaluation
@mattjohnson6916
@mattjohnson6916 4 ай бұрын
Great video! I love all the work you and Keith do so it is always cool to see you guys cross over. I can't wait to hear Keith's feedback about how it sounds and performs once it gets back to him after your work. You show a TON of great building tips here. Lyle, may your weekend be filled with good coffee, warm weather, and no poison sumac. Also, every time I hear "Transmogrification" I imagine someone putting the amp into Calvin's Transmogrifier Box.
@halbertking2683
@halbertking2683 4 ай бұрын
Everything with love .
@picksalot1
@picksalot1 4 ай бұрын
Keith always comes across as very objective, and I think he will be very appreciative of your critique of his Amp build. We can't improve without identifying where problems exist. Looking forward to hearing the results of the improvements you make. Hope there is a before and after of the sound.
@brenthorrocks
@brenthorrocks 4 ай бұрын
Thank you this was very informative!!
@flo-bezee9547
@flo-bezee9547 4 ай бұрын
I love your videos and can't wait for you to work on my Fender Deluxe reverb reissue.
@floydfifty8095
@floydfifty8095 4 ай бұрын
I really enjoy both your and Keith's channels. As a guitar player, I'm inspired by vintage amplifier videos, and guitar/guitarist/history videos. Stand by for useless info comin your way. I worked in the telecom installation biz in the late 90s to early 2000s. Lots of power cable and data cable wiring and securing. So, we used those little plastic tools, and they are called spudgers. I'm not a stickler, nor a technical dude, so no need to change your terminology on my account. In fact, I'm more of a knuckle dragging, blue collar dude that gets to break sh*t for a living.
@morenoteslesstalk
@morenoteslesstalk 4 ай бұрын
I always have my headphones near me, but not now. First time I've been missing them that much in a long time, can't wait to hear more! I'll be back 🎸
@jonathanmanley6743
@jonathanmanley6743 4 ай бұрын
I've always thought it would be cool if you did a "rate my amp build" segment. I'd love to see what you think I could do better on my builds.
@theyoungamptech320
@theyoungamptech320 4 ай бұрын
This is the kinda of guitar community we crave
@colbyjack7074
@colbyjack7074 4 ай бұрын
I called Keith. Went straight to voicemail: "I'm currently deep in the Himalayan mountains seeking emotional healing, and taking a soldering class." 😆 Actually, he did a much better job than most everyone would. The items Lyle pointed out seemed very correctable (by a pro like Lyle).
@jimbucket2996
@jimbucket2996 4 ай бұрын
I like Keith, I'm subscribed to his channel, but I always knew he had a few nuts loose. Never thought someone would make a video about it though.
@fivewattworld
@fivewattworld 4 ай бұрын
Ha!
@jjcollins
@jjcollins 4 ай бұрын
Looking forward to the finished product. If it is a "good" amp now, I know it is going to be amazing when you get done with it! Those older style Gibson amps (and clones) can be very cool!
@METEORAMPS
@METEORAMPS 4 ай бұрын
Great vid dude! Congrats for your Channel. Reggards from Spain.
@sgt.grinch3299
@sgt.grinch3299 4 ай бұрын
Excellent breakdown. I’m looking forward to sweet tones.
@jayclark725
@jayclark725 4 ай бұрын
Has Keith seen one of your video's? ;-) He knew what he was in for. You were very reasonable in my opinion and helpful to anyone else wanted to know what good practices are.
@richclayton5785
@richclayton5785 4 ай бұрын
With regard to switches getting broken. I just replaced a standby switch in a black panel Pro that got knocked. I used a short bat Carling and a back nut…maybe next time it will survive the ride to the gig.
@chokkan7
@chokkan7 4 ай бұрын
Another great presentation, Lyle. Only a few years back, these old Gibsons could be had for a song, and the cabinets (for the most part; they did use some particle board in spots) were built like tanks, good transformers, etc. The 'tone-sucking networks' (nicked that from the Guitologist, but it's an accurate description) and other quirks kept these amps from being all that they could be, and the speakers were often budget types, but they lend themselves to a complete re-build (as Keith did here) quite well.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Well, this is a clone not a rebuild, but yeah. The Gibsons of the late ‘50s/very early ‘60s have always been sleepers.
@brianmccowan1949
@brianmccowan1949 4 ай бұрын
The early GA-40s that inspired this clone did not have what many refer to as the "tone-sucking" circuit. That came later as Gibson started trying to clean things up at higher volume levels - no doubt trying to compete with Fender. The particle board came later too. I have rebuilt 2 GA-40s. One from the early 50s with all octal tubes and one from the late fifties with the 5879 preamp tubes. The were both PIAs to work on - no board, all point-to-point in a tight chassis. They used pretty marginal capacitors, especially for the filters. But once rebuilt they sound glorious. I also built a non-tremolo single channel GA-40 from a Hammond organ chassis. I look forward to hearing this one - I bet it sounds great. I also bet that Keith does not own a set of nut drivers. It's hard to get those nuts tight without them.
@richm7410
@richm7410 4 ай бұрын
I too enjoy both channels.
@lsmiii
@lsmiii 4 ай бұрын
Brutal! Keith, are you OK? I wanted to try to build a Mojo amp until I saw how ruthless this critique was. 🤣
@fivewattworld
@fivewattworld 4 ай бұрын
Oh, I see a Mojotone kit in my future actually. 😅
@paulshurmon138
@paulshurmon138 4 ай бұрын
Thanks for the video.
@victorbeebe8372
@victorbeebe8372 4 ай бұрын
Mahalo Lyle!
@Slugg-O
@Slugg-O 4 ай бұрын
Good video with constructive feedback - just the facts. I think it's a great build considering Keith is not a professional amp builder. I remember my first build. I've gone through it many times and still find things I could have done better.
@tracyc7813
@tracyc7813 4 ай бұрын
Keith seems like a reasonably nice fella. I like his videos.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Incorrect. He’s unreasonably nice.
@goodun2974
@goodun2974 4 ай бұрын
​@@PsionicAudio, as long as he doesn't keep stuff that really bothers him bottled up inside. It's such a fine line, but being ruthlessly nice can have a negative effect on one's psychological well-being; my mother was kinda like that, wanting to be a peacemaker, smooth conflicts over, and keep it all hidden, but every now and then she'd really boil over and you'd find yourself caught in the middle of a maelstrom. (Now there's a great word I probably haven't used in a decade or two). Anyway, I try to strike a more realistic balance ---- or defuse things by cracking a joke, possibly self-deprecating, perhaps not!
@benlogan430
@benlogan430 4 ай бұрын
You can’t learn without someone critiquing your work. To learn one must humble themselves and allow the learning process to run its course.
@Strumbum01
@Strumbum01 4 ай бұрын
Great rundown, Lyle! Are those the polyester orange drops? Can’t wait to see, and hear, the finished product.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Thanks. I haven’t checked yet. I don’t plan on changing the things that work (and are reliable).
@marshallohio5512
@marshallohio5512 4 ай бұрын
Gee, I would absolutely love having my build's critique by a real solid professional !!!! Nevertheless, this video is extremely valuable with the pros vs cons !!!! Oh, I highly recommend reading Rob Robinette material pertaining to all Tube Amp related topics !!!! At least Rob's Tube Amp Troubleshooting Guide !!!
@jeremycraft8452
@jeremycraft8452 4 ай бұрын
This is another terrific video on your terrific channel. WRT using the heater secondary center tap, most online guidance I’ve come across (e.g. RobRob, Merlin) says to use the center tap whenever possible. Here, you recommend balance resistors. Is that because this amp is cathode biased and you also want to elevate the heaters? What factors do you consider when making this decision?
@PsionicAudio
@PsionicAudio 4 ай бұрын
Thanks. I’ve just seen too many old amps come in with nuked PTs where the filament CT melted all the insulation off then burned inside the transformer itself. Vs amps that had artificial CTs and a similar failure, but instead of a dead power transformer there were two burned 1/2W resistors. Twenty cents later, the amp was healthy again. You can also get a better balance with resistors than you can with windings. I’ll still be referencing them to the cathode here instead of ground to take advantage of (minor but nice) DC elevation. In a fixed bias amp they would be referenced to ground.
@thewrongbike7709
@thewrongbike7709 4 ай бұрын
First time watching your channel. You point out a lot of things that most people don't even think about. One thing though: Plain metal nuts onto metal chassis. Don't they deserve washers? Even spring washers?
@kmetal83
@kmetal83 4 ай бұрын
Bravo!!!
@daustin777
@daustin777 4 ай бұрын
Great Video! It is good to see another hobbyists work. Anyone know a good tube amp tech in Southern California (Los Angeles, Orange County) area?
@emerson909
@emerson909 4 ай бұрын
Great vid, I want you to beast my build 😂
@wesleymorris1
@wesleymorris1 4 ай бұрын
Ive been experimenting with using vishey tantelums as bypass caps, they work well on bypass caps down from the first preamp tube, but make it alittle to bright if used on your main preamp gain stage. I use non polerized electros, in those first positions. But im like the results, for a boomy amp, i think it would tame that.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Be aware that tantalums will burn. Even when there’s no good reason. Most techs I know consider them completely untrustworthy.
@wesleymorris1
@wesleymorris1 4 ай бұрын
@@PsionicAudio yea ive heard that but ive also seen them on a i beleive it was a hammond organ, i repurposed from the the sixties, thats what gave me the idea. If it burns i will replace them. Im only using them on preamp bypass
@wesleymorris1
@wesleymorris1 4 ай бұрын
There also reccomended as great bypass capacitors for low voltage to ground, exactly what bypass caps do. Mr. Carlsons lab, said there great for bypass. So i figured i try them.
@goodun2974
@goodun2974 4 ай бұрын
​@@wesleymorris1, tantalum caps can *short-circuit* and blow things up; they're extremely sensitive to even the most minor pulse of opposite-polarity voltage, more so than electrolytic caps. Don't use them!
@wesleymorris1
@wesleymorris1 4 ай бұрын
@@goodun2974 i think you guys better do alittle more research, these new tantelums are very rugged they use them in aerospace and military. They can take the heat. Masa boogey uses them . Yea they dont take reverse voltage well but i well within spec of the voltage. Its worth a try, if it fails, its only a bypass cap, to ground.
@tomk1tl39
@tomk1tl39 4 ай бұрын
👍 👍
@J.C...
@J.C... 4 ай бұрын
Hey Lyle. I've got a couple of Hot Rod Deluxe questions for you. I just took the panel off my brand new one and the 5w resistors are siliconed together. Is that normal? They're also off the board by maybe 1/4", with white cloth? tubing protecting the legs. Is this how they usually are? Or has something changed? I don't remember seeing them glued together and that doesn't seem conducive to good heat dissipation. Is this how they usually are? Should I cut the silicone and spread the resistors apart so they have more airspace? My logic says they should be spread apart but you've been doing this for MUCH longer than I have so I thought I'd default to you 🤷 Thank you for your time. I can't express my appreciation enough, sir. Thanks again!
@PsionicAudio
@PsionicAudio 4 ай бұрын
They’re fine. Off the board is a recent and good change and the silicone helps keep them from vibrating. Leave as-is.
@J.C...
@J.C... 4 ай бұрын
​@@PsionicAudioawesome. Thank you! Can't tell you how much help your vids are. Thank you for sharing some of your knowledge with us. Many of us appreciate it a great deal, my man. 🙏👊
@billybingbong8501
@billybingbong8501 4 ай бұрын
Hey man love your videos. Stupid question, what camera do you use?
@PsionicAudio
@PsionicAudio 4 ай бұрын
Thanks! Sony ZV-E10 with a Sigma 2.8 18-50 lens.
@J.C...
@J.C... 4 ай бұрын
I can't stand protruding jacks on my Les Paul-style guitars. I did the double nut trick on all of them so they're flush with the nut. LOL and I just checked my amps to see how those switches & jacks are mounted but I can't really move those because pcb's. They're all flush mounted already anyway. 👍
@dhelton40
@dhelton40 3 ай бұрын
Well, you gotta start somewhere. The old lady in quality control is going to send this back to you and not be happy. Probably would do him some good to read up on good soldering practice. I keep toothed washers for switches and jacks...they ought to come with them. Nut drivers are really useful for tightening jacks and screws. Carefully drilling holes is sometimes necessary to mount terminal strips in older amps,...care should be use to avoid damaging the value of the amp. Holes should never be drilled in front or rear panels, and appearance counts. Building this is a very good place to start, as the mistakes are not in a valuable vintage amp. I would encourage anyone starting out to build some kits first. Soldering is something that gets better with practice.
@infectionsman
@infectionsman 4 ай бұрын
Is it just me or is that power switch lug real close to those tube-socket pins?
@egoncorneliscallery9535
@egoncorneliscallery9535 4 ай бұрын
Does the chassis comes from a Frenzel? I have a deluxe myself. Different faceplate, though..
@bunnyadrian
@bunnyadrian 4 ай бұрын
Keith can take it ;)
@TheWolvesCurse
@TheWolvesCurse 4 ай бұрын
Hey Lyle, love your content. i also follow 5watt, didn't know you guys know each other. do you have any experience with Engl amps? i havn't found a vid on them in your extensive upload history yet. i own a powerball 2 and love the thing, but recently i read they were made with very cheap components, and that only the "upper tier" like artist signature models, the special editions and the savage 60 and 120 were kinda "built well" (whatever that means). also apparently the all seem to be biased very cold. i do have some experience working with electronics from my job in maintenance, but i never work on live circuits (except the typical small stuff like sensors, and emergency stop switches up to 24v), so i'm hesitant to check the bias on my unit.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Thanks! No, haven’t seen an ENGL in the wild in these parts, but I know many fellow techs who don’t think they’re very well designed/built. But that’s not my direct experience, so…
@macgreiner
@macgreiner 4 ай бұрын
Curious as to why some of these more modern rebuilds don't use breakers instead of the traditional glass wire fuses? Is it merely a cost decision?
@PsionicAudio
@PsionicAudio 4 ай бұрын
Breakers are very inaccurate and physically prone to failure.
@MB-st7be
@MB-st7be Ай бұрын
I have looked in the UL code for fuse holder wiring and I can't find anything about wiring the hot to the fuse holder tip. Obviously it makes sense, but I don't think it is an actual commercial requirement. If anyone can point me to documentation otheriwse, I'd be grateful to see it.
@joeshepard
@joeshepard 4 ай бұрын
Just wondering how long is your wait list is now?
@kmichaelp4508
@kmichaelp4508 4 ай бұрын
Good thing it wasn’t a Marshall clone! Do I need to say more Lyle?😂
@MatthewSwasta
@MatthewSwasta 4 ай бұрын
I wish Keith would have done a reaction video to this one...😜
@fivewattworld
@fivewattworld 4 ай бұрын
Oh, we’ll be going live to talk about it, :)
@MatthewSwasta
@MatthewSwasta 4 ай бұрын
@@fivewattworld nice!
@ikestoddard2458
@ikestoddard2458 4 ай бұрын
Lyle I am about to buy a MusicMan Twin combo amp. Clone of Twin Reverb, but 130 W allegedly. Do you have any good words about it? Bad words? Would you have a look at it for me?
@goodun2974
@goodun2974 4 ай бұрын
Lyle would probably tell you NOT to buy a Music Man amp; not that you can't get decent tone out of it but most Music Man amplifiers are hybrid amps that are partially or mostly solid state (therefore most definitely not a Twin "clone"), and many of the old transistors and other parts are almost impossible to get nowadays , and if you ever blow a transformer they are indeed "unobtainium" these days. I certainly wouldn't advise spending more than a couple-three hundred bucks on it at most, and only if it's working 100%.
@goodun2974
@goodun2974 4 ай бұрын
In my experience it's extremely rare to see a vintage chicken-head knob actually crack; I suspect that the modern-production Dacaware knobs that came with this amp kit are either a plastic formulation that isnt a true bakelite, or it's a bakelite formulation that uses a different binder/filler than the vintage knobs did (it may have been asbestos or some kind of lung-damaging silica filler being used in the vintage knobs).
@goodun2974
@goodun2974 4 ай бұрын
By the way, although I can understand why KZbin does it, it annoys me that if I re-read one of my comments and decide to go back and fix a spelling or grammatical error or a poorly thought out concept, I'll lose any ❤ that has been already attached to it....
@tedrobinson3802
@tedrobinson3802 4 ай бұрын
You certainly wouldn't want to to look my first amp.
@embreesmith7613
@embreesmith7613 4 ай бұрын
I have run 20 Maybe shall Watts for 25 years At one time I played out with a DL 10
@jutukka
@jutukka 4 ай бұрын
IMO good quality capacitors, both electrolytic and smaller coupling caps, are quite expensive. I was planning to recap one amp of mine, from 90's, but when I calculated the cost of those caps, and figured out how many sixpacks of beer I can buy with that money...
@goodun2974
@goodun2974 4 ай бұрын
Ah, but you can actually *own* an amplifier; you can only "rent" a beer!
@jutukka
@jutukka 4 ай бұрын
@@goodun2974 Sometimes immediately after drinking ten beers I feel better than immediately after soldering ten caps. 🤔
@goodun2974
@goodun2974 4 ай бұрын
​@@jutukka, two beers and I might be ready for a nap; after three beers, definitely.
@johnl8081
@johnl8081 4 ай бұрын
Rumor is that Keith is starting an amp repair/building channel called ‘5-onic Audio’……
@goodun2974
@goodun2974 4 ай бұрын
No, such a company would of course be known as "Keith Kit"!
@macintune
@macintune 4 ай бұрын
Another great amp walk thru. I sending you another email hoping to get in line for your help on my amps.Bill subscriber since you reached 3k 🎉
@retread1083
@retread1083 4 ай бұрын
Looking at Schematic Heaven, apparently there are at least 3 different GA-40s. GA-40: cathodyne PI, 6V6 output. GA-40t Crestlline: cathode PI, 7591 output GA-40 Les Paul: paraphase PI, 6V6 output (and a funky shunt MV) Is this amp cloned after one of these, or something else?
@PsionicAudio
@PsionicAudio 4 ай бұрын
Les Paul variant
@retread1083
@retread1083 4 ай бұрын
I'm not fond of paraphase PIs but keeping it does make it easy to replace the tone-sucking shunt MV. Delete the 5nF cap. Add a 100nF cap to the plate of the upper triode of the PI. That feeds the CW end of the 1MΩ pot. The wiper then feeds the existing 20nF. At least that's how I'd do it. YMMV.
@chrisquinn9104
@chrisquinn9104 4 ай бұрын
I can see a bit of what Brad calls “poke and pray.” Is that acceptable in some cases, or never acceptable?
@PsionicAudio
@PsionicAudio 4 ай бұрын
It’s not optimal, certainly. Most will be redone, but I didn’t want to belabor every little point.
@chrisquinn9104
@chrisquinn9104 4 ай бұрын
@@PsionicAudioI’m asking because sometimes I use the technique because it’s easier to change if I need to
@PsionicAudio
@PsionicAudio 4 ай бұрын
Lots of lots of amps are done that way. Some hold up. Most eventually don’t.
@j.justinzimmerman9836
@j.justinzimmerman9836 4 ай бұрын
Nice little trick at 11:45 ! JJZ…(°¿.°`)
@steveDC51
@steveDC51 4 ай бұрын
I know this definitely does not apply to Kieth but some people ask for criticism when what they really want is praise.
@PsionicAudio
@PsionicAudio 4 ай бұрын
Sounds like a good topic for a 5WW video…
@goodun2974
@goodun2974 4 ай бұрын
​@@PsionicAudio, I can remember turning in an early draft of something I wrote to a writing teacher with a note asking "please tell me how you think I can approve this paper". I had meant to write *improve*, or at least I thought I did.....😉 ( It's also a royal pain that for my entire my brain always writes copy inside my head far faster than I can get the words onto paper or typed into the screen; but now my short-term memory sucks, to the point that by the time I get towards the end of what I am actually writing I've forgotten exactly how I wanted it to finish.....)
@RudolfWolph
@RudolfWolph 4 ай бұрын
Can't wait for all those pesky extra watts to get surgically removed.
@stevebeck3164
@stevebeck3164 4 ай бұрын
"Stay tuned for the transmogrification" ??? Transmogrify - to change or alter greatly and often with grotesque or humorous effect. Intended word?
@PsionicAudio
@PsionicAudio 4 ай бұрын
Absolutely. As humorous effect…
@merrillaldridge2775
@merrillaldridge2775 4 ай бұрын
​@@PsionicAudio The first time I ran across "transmogrify", it was in reference to a Root Goldberg machine. That, in and of itself, makes your application all that much more hilarious.
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