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.
@socallars37484 ай бұрын
All things considered, you did a good job! Nice little amp which made for a great instructional video.
@gerardoromano34364 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-et2ub4 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! 😆
@richclayton57854 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.
@JeffMcErlain4 ай бұрын
What a mess Keith... 😉
@willmcbride44354 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!
@BXGuitars4 ай бұрын
"He loves doing things he's not an expert in" You just described me every time I pick up a guitar. 😆
@goodun29744 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.
@kevinfarrellUK4 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. :))
@demesisx4 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!
@billklement24924 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!
@socallars37484 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.
@tedc66944 ай бұрын
Very cool. Love it when Simon and Simon goes on holiday and shows up on Magnum P.I.
@vanguard90674 ай бұрын
Great you guys have a good (and trusting) friendship. I’ve watched your shows together and really enjoyed them.
@turkeeg76444 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.
@chipsterb49464 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.
@wailinfree73504 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
@sseltrek1a2b4 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...
@MarcCarriage121Ай бұрын
Been watching Keith Williams for a while now . He is or seems like a nice guy. His videos are very informative. 🎸😎
@martinreid17404 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
@JeffBurkholder4564 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
@ditchgator14 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)...!!!👍👍
@shakeypeet4 ай бұрын
Morning Lyle . I have learned in my personal builds , That attention to detail is everything ......Cheers
@weschilton4 ай бұрын
I love these videos... the wealth of knowledge from your experience is incredible.
@LarsonGuitarPlayer4 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.
@reverb5084 ай бұрын
Great video! I'm sure Keith is taking copious notes! P.S. 9:23 - Matt Silvernut is my Chippendales stage name
@audunrundberg91804 ай бұрын
HAH
@GRequinBlancАй бұрын
So mean! lol. Keith is such a prince of a man he will really appreciate your work
@richclayton57854 ай бұрын
“Remonstrance” great word!
@goodun29744 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.
@misterknightowlandco4 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-t2g4 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
@jonnybeck67234 ай бұрын
Thanx Teach... Lookin' forward to seein' this here clone get all dolled up!
@goodun29744 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*!
@cee128d4 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.
@fivewattworld4 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. 😊
@goodun29744 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!
@markmcdonald57114 ай бұрын
@@cee128d Dynaco and Patco, early 70's stereo amps.
@joshuagibson25204 ай бұрын
Dynaco preamp kits.
@stuarthossack79064 ай бұрын
Very enjoyable video. Done with respect and forensic attention to detail, I think you struck the balance just right. Love from UK.
@pauldavis63564 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.
@jimsalman72574 ай бұрын
"Closer to Flush": A big 1980s hit song by the Indy-go Girrls.
@thehaughtcorner4 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...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-mv5bu2kk8bАй бұрын
Good and very fair evaluation
@mattjohnson69164 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.
@halbertking26834 ай бұрын
Everything with love .
@picksalot14 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.
@brenthorrocks4 ай бұрын
Thank you this was very informative!!
@flo-bezee95474 ай бұрын
I love your videos and can't wait for you to work on my Fender Deluxe reverb reissue.
@floydfifty80954 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.
@morenoteslesstalk4 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 🎸
@jonathanmanley67434 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.
@theyoungamptech3204 ай бұрын
This is the kinda of guitar community we crave
@colbyjack70744 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).
@jimbucket29964 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.
@fivewattworld4 ай бұрын
Ha!
@jjcollins4 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!
@METEORAMPS4 ай бұрын
Great vid dude! Congrats for your Channel. Reggards from Spain.
@sgt.grinch32994 ай бұрын
Excellent breakdown. I’m looking forward to sweet tones.
@jayclark7254 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.
@richclayton57854 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.
@chokkan74 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.
@PsionicAudio4 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.
@brianmccowan19494 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.
@richm74104 ай бұрын
I too enjoy both channels.
@lsmiii4 ай бұрын
Brutal! Keith, are you OK? I wanted to try to build a Mojo amp until I saw how ruthless this critique was. 🤣
@fivewattworld4 ай бұрын
Oh, I see a Mojotone kit in my future actually. 😅
@paulshurmon1384 ай бұрын
Thanks for the video.
@victorbeebe83724 ай бұрын
Mahalo Lyle!
@Slugg-O4 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.
@tracyc78134 ай бұрын
Keith seems like a reasonably nice fella. I like his videos.
@PsionicAudio4 ай бұрын
Incorrect. He’s unreasonably nice.
@goodun29744 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!
@benlogan4304 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.
@Strumbum014 ай бұрын
Great rundown, Lyle! Are those the polyester orange drops? Can’t wait to see, and hear, the finished product.
@PsionicAudio4 ай бұрын
Thanks. I haven’t checked yet. I don’t plan on changing the things that work (and are reliable).
@marshallohio55124 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 !!!
@jeremycraft84524 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?
@PsionicAudio4 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.
@thewrongbike77094 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?
@kmetal834 ай бұрын
Bravo!!!
@daustin7774 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?
@emerson9094 ай бұрын
Great vid, I want you to beast my build 😂
@wesleymorris14 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.
@PsionicAudio4 ай бұрын
Be aware that tantalums will burn. Even when there’s no good reason. Most techs I know consider them completely untrustworthy.
@wesleymorris14 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
@wesleymorris14 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.
@goodun29744 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!
@wesleymorris14 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.
@tomk1tl394 ай бұрын
👍 👍
@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!
@PsionicAudio4 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...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. 🙏👊
@billybingbong85014 ай бұрын
Hey man love your videos. Stupid question, what camera do you use?
@PsionicAudio4 ай бұрын
Thanks! Sony ZV-E10 with a Sigma 2.8 18-50 lens.
@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. 👍
@dhelton403 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.
@infectionsman4 ай бұрын
Is it just me or is that power switch lug real close to those tube-socket pins?
@egoncorneliscallery95354 ай бұрын
Does the chassis comes from a Frenzel? I have a deluxe myself. Different faceplate, though..
@bunnyadrian4 ай бұрын
Keith can take it ;)
@TheWolvesCurse4 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.
@PsionicAudio4 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…
@macgreiner4 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?
@PsionicAudio4 ай бұрын
Breakers are very inaccurate and physically prone to failure.
@MB-st7beАй 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.
@joeshepard4 ай бұрын
Just wondering how long is your wait list is now?
@kmichaelp45084 ай бұрын
Good thing it wasn’t a Marshall clone! Do I need to say more Lyle?😂
@MatthewSwasta4 ай бұрын
I wish Keith would have done a reaction video to this one...😜
@fivewattworld4 ай бұрын
Oh, we’ll be going live to talk about it, :)
@MatthewSwasta4 ай бұрын
@@fivewattworld nice!
@ikestoddard24584 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?
@goodun29744 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%.
@goodun29744 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).
@goodun29744 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....
@tedrobinson38024 ай бұрын
You certainly wouldn't want to to look my first amp.
@embreesmith76134 ай бұрын
I have run 20 Maybe shall Watts for 25 years At one time I played out with a DL 10
@jutukka4 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...
@goodun29744 ай бұрын
Ah, but you can actually *own* an amplifier; you can only "rent" a beer!
@jutukka4 ай бұрын
@@goodun2974 Sometimes immediately after drinking ten beers I feel better than immediately after soldering ten caps. 🤔
@goodun29744 ай бұрын
@@jutukka, two beers and I might be ready for a nap; after three beers, definitely.
@johnl80814 ай бұрын
Rumor is that Keith is starting an amp repair/building channel called ‘5-onic Audio’……
@goodun29744 ай бұрын
No, such a company would of course be known as "Keith Kit"!
@macintune4 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 🎉
@retread10834 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?
@PsionicAudio4 ай бұрын
Les Paul variant
@retread10834 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.
@chrisquinn91044 ай бұрын
I can see a bit of what Brad calls “poke and pray.” Is that acceptable in some cases, or never acceptable?
@PsionicAudio4 ай бұрын
It’s not optimal, certainly. Most will be redone, but I didn’t want to belabor every little point.
@chrisquinn91044 ай бұрын
@@PsionicAudioI’m asking because sometimes I use the technique because it’s easier to change if I need to
@PsionicAudio4 ай бұрын
Lots of lots of amps are done that way. Some hold up. Most eventually don’t.
@j.justinzimmerman98364 ай бұрын
Nice little trick at 11:45 ! JJZ…(°¿.°`)
@steveDC514 ай бұрын
I know this definitely does not apply to Kieth but some people ask for criticism when what they really want is praise.
@PsionicAudio4 ай бұрын
Sounds like a good topic for a 5WW video…
@goodun29744 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.....)
@RudolfWolph4 ай бұрын
Can't wait for all those pesky extra watts to get surgically removed.
@stevebeck31644 ай бұрын
"Stay tuned for the transmogrification" ??? Transmogrify - to change or alter greatly and often with grotesque or humorous effect. Intended word?
@PsionicAudio4 ай бұрын
Absolutely. As humorous effect…
@merrillaldridge27754 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.