The Designer of the Peavey Classic 30 should be CASTRATED!
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- Опубликовано: 13 янв 2024
- I don't know whether it was James Brown, Hartley Peavey, or Mickey Mouse who designed this amp, but whoever it was, they were at once both a sorcerer and a sorcerer's apprentice. If you leave the box shut and never look inside, you'll swear this is some boutique marvel with secret sauce sprinkled all over it, with a circuit board probably caked in epoxy goo to thwart the would-be cloners, à la Howie Dumble. But no, this was a run of the mill production amp for its time, made as cheaply as possible in a USA factory at a time when production of all things guitar and electronics related either had moved or were moving overseas to Asia. You might even call it one of the last great American amp designs, which also happens to be a simultaneous piece of unmitigated donkey sh-t. This is a heady mix which is advisably drank in measured doses in a studio or other climate controlled environment and not relied upon in any way at a gig, and you'll soon see why. So sit back and enjoy as we repair and demo an early 1990s Peavey Classic 30 guitar amplifier - the WORST 'good' amp I've ever repaired.
#electronics #repair #guitar
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What a great video !! It reminded me of the nightmare of coping with a Vox Cambridge (?) amp several years ago, which required about 9 hours of disassembly just to reach the circuit. Then your PCB circuit tracing at the midpoint of the video reminded me why I shun this style of construction like a leper who wants to hug. The trio you have assembled for the audio demos was splendid.....Ollie & Jack need to take some notes.....climaxing another fine video from my favorite amp guy. Thanks !!!
Thanks Doug. Good to see you, my friend. It's just a real shame they felt they couldn't sell a true hand wired version of this same amp without all the parts deletions and weird design choices, like IC reverb. Some things they got right, like the 12V per tube (36V total) DC supply for the preamp tubes. I think that's a stroke of genius that lowers hum considerably I'd imagine. But then they doom the design with all the other choices. Shame. This could have been an all-time classic amp if not for the cheapness.
Gotta love when UD shows up. It's officially a party!
Thanks, T. Where's the beer ?@@thatampguy
Uncle Doug, I am actually very impressed with this particular amp design - i prefer it over ALL other amp designs since 1951
I guess we all have our likes and dislikes, PK. Thanks for sharing :)
This is one of the most used amps in Nashville by session players. I have an original American made first run Classic 30 and it has made it on a ton of records. I dig it.
I absolutely love the Peavey Classic series.
Same! ❤️
I gigged a Classic 30 for years with no issues in Maine, freezing cold van drives to still smokey bars and nothing but tube changes, i still have it and it works awesome I will never sell it haha literally my favorite all around amp ever haha! I'ts got a two button switch that does reverb and channel and the boost is not footswitchable. Fun amp for small change RIP Peavey USA.
Should have run american tubes so no tube changes
@@johnsmith-bk4ps I think it came with sovtec tubes its got electroharmonix tubes in it now, I had mesa boogie tubes in my previous classic 30 ( I have had an original tweed and a USA black tweed which I still have), those tubes became microphonic after a few years of hard use too but they did last a while...I have been playing these since '96 for reference I got the black one in 2000, I am not a tech so maybe I didn't always need to change them, but I did. What brand of USA tube would you recommend I may need to switch em out again someday haha cheers 🤘🏻🎸🔨
Same. Gigged a Custom 30 … sometimes with two Custom 20 s as satellite speakers / W/D/W … for years: all good, still got ‘em …
Mind you, I looked after my gear …
I bought this from a guy on classifieds in Utah he had rehoused it before me. I installed the speaker jack in the rear and gigged with this amp a few times actually! This is crazy to see it on your channel lol
Thanks for sending it! I’ll get with you tomorrow about shipping it back.
This is what makes a platform like RUclips so strong. Videos and channels like this. I just woke up and now an hour later I have so much more knowledge than when I swung my feet out of bed. And watching/hearing you play is just pure entertainment. To you it's just random noodling. To us mere mortals it's what we're striving to achieve as our goal for the instrument. Fuckin' magic man.
Excellent Brad, the Classic 30 was my first tube amp back on the 90s and I enjoyed watching you recap the amp. The sound check at the end was outstanding and loved it brother man.
Glad you enjoyed it!
Brad, your one-man-banding makes us all look bad as usual, aside from all your electronic sorcery. Legend.
Brad, so nice to see this type of content again. This and the Eico vid were very informative and entertaining.
I love this design, I've made so much money repairing these amps that I would love to kiss the designer.🙂
Man, that old Classic 30 sounded great! As most folks know, the classic tweed series was a sleeper. Hope the owner is happy and it lasts a good long time.
To be honest Brad, I took about a year or 2 away. I came back to see what you had going and THIS is what I remember you for. Straight amp repair/mods with no BS. Great video.
Most of the time these amps are usually built to a manufacturing budget to maximize the profit-margin, so manufacturers like Peavey will try to find all sorts of ways to cut manufacturing costs where they can, Leo Fender did that a lot.
Haven't watched one of these amp repair videos in awhile. I really enjoyed the jams at the end.
Apart from the fact that you have one of the most serious, informative and acourate channels on YT, you sir are a great player! If the music in the end of the video is yours, I totally respect you as a composer too. Greetings from Greece!
Hell yeah, I really enjoy the amp repair/mod videos
I used to play through the Classic 2x12 50 watt from the 70’s.. I wish I still had that amp.. loved that thing.. great video!
Great video Brad. Just back from a gig. This was a cool Sunday treat. Really enjoyed it. The way they have those boards reminds me of a Fender Bassbreaker I opened up recently. Except they built the chassis around the boards. When you take chassis out the case it looks like a square metal tube. Take care Brad.
Wow the demo at the end was incredible. One heck of a good bass player,drums, and the guitar player is awesome. I had a C 30. back in the day and I loved it until it broke, then got it fixed, broke again and trashed it after that I think.Enjoyed the video very much thanks man. oh yes I had to watch the demo twice.
Always nice to see a new amp video from Brad! Screen resistors can be funny. I’ve found a few amps that definitely sound better with the screens a few volts higher than the plates. Not sure why that is but when that’s the case ,I don’t argue with the amp,lol.
Great video, thanks for the walk through of your diagnostic process.
I don’t know crap about what you did but could not stop watching until the end…love your videos like this …wish I had your skills…just amazing…nice picking at the end. Cheers!!!
James Brown was the godfather of soulful Amp designs. He managed to squeeze a lot of tone out of the budget that H Peavey gave him -- and those amps sound killer with the proper speakers and set up! Nice work!
@@Peterbrendanalbert the ol' Celestion v type that people are unloading for no reason, other than it being oem, is amazing in this amp!
That was a lot of crap to go through and a interesting video. Nice job Brad
This channel is rocking. Good job Brad.
I appreciate that!
Thank you so much for your patience !!! I appreciate your resistance . Much respect from France ! Thank you ❤️🎶🙏🌈
I just canabalized an old Peavey mixer and have tons of those chips & I bet the reverb tank is the same too.
Thanks Brad!
So interesting watching you work!
Enjoyed the video and the jamming at the end Brad, thank you!
Those RC4558 ICs have the same pinout as some other Dual Op Amp ICs such as the JRC4558D, TLO72CP, LF353, all three of those ICs can be used as drop-in substitutes.
Yes, the 4558 is an upgrade for certain. It's a chip that doesn't get taken seriously often, and was used all over mackie consoles etc. Pedals, budget converters etc.
I can say I've put them in fader buffer stages of old British mixers a few times, and man does it open them up. Makes them sound way more open and transparent. Cheap chip to. Also the 2068d is maybe even better. Super hi end guys tend to look down on them, and like stuff like THAT and LME49740 etc., but the jrc stuff is great sounding stuff.
@@Intrinsic.Recording The TLO72CP has the same pinouts as the RC4558 and JRC4558D, except that the TLO72CP uses two JFETS for the inputs on Pin 2, Pin 3, Pin 5 and Pin 6, instead of Bipolar Transistors, the benefit of that is a lower noise-floor than the RC4558 or JRC4558D, as well as much higher input impedances (about 10M for the TLO72CP).
Great video!!! Watching it brought back shades of terror when I opened up my late 90s DB 210 to replace all the caps as some were leaking after 20 years plus of gigging. Nobody wanted to work on it. I will spare you the gory details, but, in short, when it was complete days later and ready to test, I set the amp out on the back patio, power switch on, and connected it to an extension cord. I then plugged it in from a distance. If it burnt to the ground well then so be it. But it worked! To my amazement and brought new life to an old amp. I replaced the blue marvels with greenbacks and still use the amp to this day. But to your point, I would have preferred the concrete shoes river crossing method. Rock on!
Brilliant, start to finish.Like you say, the amp sounds amazing.
My Peavey "Backstage Plus" solid state has served me well for 40 years and still going strong. Great jam session at the end of the video!
Love the use of a real ink pen ... Brad is a truly stylish and considered Gentleman ! 👍👍
Only the best will do.
@@TheGuitologist I bought 6 x159's after watching your vid and gave 4 to friends as christmas presents. The days of leaky ol messy pens is long gone and writing with a fountain pen makes your penmanship improve (for most folks) immensely. Happy New year brother, here's to a good one 👍✌😎
What a killer video Guitologist, you’re definitely one hell of an amp tech !! What a killer Jam session Guitologist your musician ship blows me away !!!
Glad you enjoyed it! Thanks for watching, Ricky!
Heck- I just was looking for the clips where your playing! Nice guitar work!
Fender Bass Breakers are built that way, too. Because, you know, fuck amp techs.
Those folded 3-sided pcbs are a goddamned nightmare.
I honestly prefer them VASTLY to that crappy grey ribbon cable of perpetual intermittance. At least you know you broke one, and where.
Great job with the heat gun Brad. I'm impressed.......... I learned something
Got two of these in the basement now needing help - one newer tolex style that likely just needs a socket re-flowed but I've been dreading dealing with the ridiculous pcb taco to the point I just move on to the next project. The second is an older tweed one that's in pieces - that'll likely end up getting re-wired into something else. This video gave me some ideas though, and maybe the courage to get it over with. Thanks!
😂 Is not as bad as the internet warriors would have you believe 😅
Thanks for demo-ing the amp so that`we could here what it sounds like. It helps that the guitar playing was superb, and the tones from this amp are wonderful.
I used to have one of those grey carpet-covered Fender 4-12 cabs! Great cabinet
I own a Classic 20 Amp with it's onboard 10' Speaker and two EL84. Had to recap that thing and bias it down, 'cause it really ran hot. It was a pain in the butt but this amp sounds awesome for a little 15 Watt combo.
I also changed the baffle to a 7mm pine board, which was imho a big win. You want this cabinet to resonate more.
dude! your jams at the end are killer man!! such cool stuff, you're an amazing guitar player dude..!
Peavey made some hand wired amps at one point, one was called a sensation and one was called a masterpiece, would be cheaper to find one of them than to convert a classic 30. Great video, I enjoy watching your work
Have one of these waiting to go on my bench right now. Thanks for this! Great video, great chops on the music bit at the end. Like song clip #2. Got a fusion feel to it. Love it! Oh...and the dreaded IC caps...hate em! Everybody is using the still. Cheap stuff. I see guys saying they never have had any more issues with IC than other brands. NOT my experience at all. Thanks again man!
the testing noodling sounded great.. and the finger picking was impressive
Lovely stuff mate 👍x
Greetings from Plymouth UK x
Good video. Thanks for posting.
Peavey Classic 30 is a great combo amp. It's indestructible. Never knew how difficult it is to work on because I never had any issues, until I sold it. I had one from the the last "made in the USA" batch. Now they're all Chinese. Haven't had the need to use one of this since I went digital.
Obviously they are not indestructible hence the repair video lol. Seems like a nice amp besides the serviceability issues!
I've seen a number of these after they've aged a bit. My memory is what you encountered. The first time getting it apart is a pain. Peavey like Fender seem to run the EL-84s too hot and it causes issues with the board. Like a Fender Blues Junior. Also the filaments might be in series.The Classic also has them running DC for hum reduction, but that might be the Classic 50 Which also sounds great! And the filaments are fused...A "low budget " amp where the value of the amp is maybe less than the repair cost. I fix them anyway. Good job chasing down the odd screen resistor configuration. When these were designed, EL-84s must have been cheap enough to not worry about short tube life.
70% bias is good!
Getting better at drums Brad! not bad! hell yeah.
Good job mate! Did ya replace those microphonic tubes? Crazy how an op-amp chip can blow up so often; maybe from back emf from the reverb? Possibly back-to-back 1N914/1N4148 diodes between ground & the reverb i/p pin on the op-amp may help, depending on the voltage on that pin. Diodes won't switch on till there's 0.6V across them.
Hey, you're a one man band then huh? Fricken awesome Mr. Music you can do it all can't ya! Music demo was spot-on & thanks for the video! 😃👍!
I've got the classic 30 combo. Beautiful sounding amp.
You have a knack for cool 60s style jam rock Brad.
I don't work on amps for a living, but have diagnosed quite a few with IC related issues, in which the IC sockets were actually bad from vibration. mostly dual or quad op-amps, where the ic would blow, lose output or worse yet, drive the final amp stage to full + or - rail voltage, melting voice coils, transistors, tubes and whatever else is in the circuit.
my solution was to get rid of the sockets and directly solder the IC's in, the problem was often missed by other shops because it was fairly intermittent, where handling or heat cycling the would fix it temporarily, so I don't blame them for missing it. it's not just amps that are well known to have socket issues.
Wonder if socket cleaning might have solved it in your case.
I am a tech at Clawsons music they sold these about 26 years ago I have worked on just a few I think the reason the ic capacitors hold up better is because the tubes are el84 the voltages are lower maybe 325 but on fender blues deluxe and pro jr they are notorious for leaking causing an audible ripple the fender amps they are lined up like 47 22 22 22 at 450 500 volts they all go bad I like jj electronics and f&t and a new one from tube depot MOD capacitors.
I know nothing about this stuff but it was fun to watch. Thanks
good job there brad! i always enjoy the amp fixes, but
its the road test i look forward to most, there`s something
about the multi role finale performances, you could do a
cream tribute covers album..on your own 🤔👍😇
Good job! It does sound good!
Hey Brad, great video!,
After reviving several of these C30 Peavey amps, I think that the customer wanted to be able to switch the output transformer from 16 ohm to 8 ohm. The wire is there. We all just need some one like you to verify the wiring.
I didn't see any extra wires coming from the transformer. Not sure what you're talking about there.
Great vid! Thank you. I got one of these. Burned through 3 Blues Jr.s and a Hot Rod Deluxe. Sound great, but 'Stew Doghouse"! under the hood.
Hey Brad thanks as always for your videos it's good to see you on my feet again LOL when I was cited I was pretty handy used to work on my car as my motorcycles 30 years ago when I bought a house I did my electrical plumbing all that stuff I've always been handy and it would have been a real asset if I had access to your videos back in the day but it's still really interesting I'm still learning all the time doesn't matter whether I could see or not you kind of trick me though I'm sure that wasn't your intention at about 28 minutes when the I could tell you know there was a cut in your and it went to this music and I automatically reached out to find the skip ad button and couldn't find it so I found the the elapsed time and saw that it was still going and realized that will just just different music LOL hope everything is well with you bro thanks again for your videos sincerely Bob the blind bedroom
Hello Bob! Good to see you. Hope all is well. Happy New Year, my friend!
Nice episode Brad, been thinking of getting the original version of this amp.
Good playing too, thr basist seems very shy and the drummer looks... dunno, he remind me of someone 😊😊
Yup! I had a Peavey Classic 30 combo about 25 years ago that I bought new. It sounded great...until it stopped working about 2 months later. I had it repaired under warranty. The tech who worked on it agreed with you on every point you made, especially those regarding the crazy flexy board layout which was the source of the problem I had. I picked it up, took it to a music store and traded in toward a Fender Blues deluxe. A much better amp that I wish I still had.
Great player!!! great vid...my Peavey rocks!!
😂 James Brown of 5150/amp tweaker/ Iconic amp designed the classic 30 to be able to get a tube Amp that sound good for under $300 and that was the goal for this amp. The classic 30 has the same folded up boards as the 5150 peavey as he designed the amp for Eddie Van Halen to be affordable, which I guess it was achieved.
Dingding!
It’s a great sounding amp. It feeds back well. I dig that. I also dig your signature guitar. That thing looks cool and sounds good. Love that nasa shirt too lol.
Seeing that adhesive come off was oddly satisfying.
I figured out a cool way to cut the ends off of the wires. I use a similar tool and I filed down the 24ga setting to make it crimp down a bit more on the wire. I give it a little wiggle on the attached side in a back and forth or circular motion. Obviously, you have to be gentle. You can use your nails after that. I kept exposing wire after crimping down with needle nose pliers. You might have a better touch with that.
Weeks later many thousands of Peavey Classic 30Amps arrived at his shop with the same problem , nice playing great fix
Another great video brother! I wanted to mention, over the years I've had a number of Peavey amplifiers, and invariably they all have had solder issues, especially their XR600 PA mixers. Not sure why, but many of the solder points will, what I call "volcano", where there's a cracked ring around the component wire. A few minutes with an iron and it's a fix. I will concur that some of the boards are a mf'er to get to, but in general, the Peavey stuff is pretty rugged.
Anyways...thanks for the vids...keep 'em coming!
I have a Classic 50 head and am finally getting it back after….25yrs in storage. Here’s to hoping its still good. I loved that amp through a old Lee Jackson 4x12 cab
Kick ass guitar playing Brad and a good insight to the problems associated with the board layout on these kind of amps - very strange and awkward design to say the least!
Keep on rockin' brother.
Cheers
Alex
They really are great sounding amps.
Loved the playing Brad .
Thanks, Bruddah.
The "Beauty" of the Classic Thirty
is the mass production CB design.
The simplicity relates to cost of production. It's laughable and
Genius at the same time.
Somebody has hand wired this circuit
on you tube. But they went over the top
in mods with the original design.
I believe if somebody went to the effort
to actually create a hand wired
simple chassis and build of this
absolutely killer ( FOUR) EL 84
Peavey amp. It would be the
Ultimate amp kit build
for anybody to have.
The tones of the Classic Thirty
are legendary. It blows away
A Vox AC 30. For a fraction of the cost.
IMHO. For that matter a lot of really
expensive Boutique amps for thousands of dollars.
Hartley Peavey is American legend.
The longest American ( SINGLE CEO) owned and operated amplifier in
US HISTORY.
Agreed on all counts.
Cool throwback logo 😀
I used to do a mod to these amps so that they were a part-for-part AC-30 clone, and after the mod they sounded fantastic but that strange PCB was a nightmare and I was concerned that the disassembly required to access the circuit would lead to reliability issues down the line. Glad to see it wasn't just me who thought so...!
"If i wasn't doing it on purpose it would of been easy" aint that the truth
Had a classic 30 for 20 plus years, no issues. My son's favorite amp.
Good on you for making it work. These were great affordable amps in their time, but not built to be serviced. The transformers are very solid. At this point, it’s a great candidate to convert to the classic circuit of your choice on an eyelet/turret board.
I seem to remember doing some servicing work on an amp similar to one of these Peavey Classic 30s, if I remember rightly, the amp I serviced needed a new replacement power transformer, very similar to the power transformer in this amp.
Yeah, I'd call this transformer 'puny'.
@@TheGuitologist I'd have to agree with you on that, compare the size of that transformer to say the power transformer from a 50W Marshall amp.
@@TheGuitologist You could also compare the stock power transformer to a Vox AC30 power transformer.
Almost forgot to mention. 90% of opamp chips like that tend to have higher quality replacements now, but just like tubes you have to make sure the spec is close enough.
In 20 years this will be coinsidered easily repairable compared to most of the crap tube amps being made now.
Still better than a mesa lol.
Hah recognized this amp just from the intro. Have one of my own, modded extensively, hate to work on it, but it's a great amp indeed. Made mine to sound more akin to Mesa MKII, instead of the classic 80's hair metal sound it originally made.
Hi Brad , nice work as always . Some folks like the power from a100 watt amp , but the difference between a 50 and 100 watter is only 3 Db . But I do like the 30 watt amps to for gigs. Nice sounds . I st!ill have my 400 musician head and cabs .But it keeps blowing my resistors . Didn't know you have more brothers that look like you ? Tripletts ? LOL. Have a great day bud.
That Amp does have a sweet tone. 👍
Nice job Brad!
As a fan of your channel, it's cool to see you working on a Peavey. I have a similarly designed Bravo 112, and the only issues I've ever had were blown Reverb ICs. I'm currently using a TLO82CP and hoping for the best. Keep up the great content.
😊 I love my peavey Bravo combo but the reverb is so dynamic that I can't turn it up past 7 because it actually starts to whistle and feed back through the reverb circuit. Would the parts you replaced stop the micrphonic nature of the reverb past 7 !?
@auntjenifer7774 Putting the tank in a bag helps quiet it down when turning up. The TL082CP sounds better too.
The engineer that designed the Peavey Classic series left Peavey and went to Kustom. The Kustom Defender series and the Kustom Coupe series amps were designed by the same person. Great sounding amps that are no longer made abd can be found very reasonable on the used maket
It was James Brown right? The same guy that designed the Peavey ultra/XXX ,and 5150.
@@shredenvain7 That name sounds familiar but it's been too long for me to be certain.
I love the sound of the Peavey Classic series as well as the Kustom Defender 112 & the Coupe amps. The way that the Classic series is built is a pain to work on but for the most part, they seem to hold up well even though the circuit boards are pieced together as they are
Yes it's James Brown ! He also designed the peavey Bravo and the Rockmaster tube pre amp ! Both awesome ! He owns his own company now called "Amp Tweaker" and he's got some killer pedals !
Its so cool how he is showing off the peavey at the end but behind him there are all these treasures that look like came from the Titanic after it sunk. It does sound great and great playing by the way. I would love to see a video on the 6505+ combo 60 watt. I have one and would love to mod the clean/crunch channel.
that's just how these were done, made in the USA. They made the pcb's in house. The 5150 combo and Delta Blues are similar, still much easier to take apart (and much more spacious in the chassis, not cramped) than some modern equivalents. There is an elegance to those pcbs all connecting with jumpers, USA built, and single layer. I see 80's/90's Peaveys as mojo, they're solid.
Curious why the owner asked for a more saturated reverb when the wire was severed and inoperative? Also how Peavey designed the board omitting screen resistors. I'm definitely going to double check my newer boards and hopefully not find anything that weird. As always; Nice job Brad
I have a Classic 30 combo. 2023 model. The first one burned up in 3 days. It was replaced, this one is perfect as most of them are.
The odd screen resistor arrangement *could* make each half of the paralleled tube pairs break up at different drive levels so giving you a greater amount of that overdrive sound or give *some* overdrive at moderate volume levels.
I had considered that too, that they might be going for some kind of asymmetrical output thing also, but I don't think the tradeoff of tube life due to no screen protection is worth it. if they wanted something like that, they should have at least done something like a 470R for the entire screen supply, then give each tube a different screen value above that.
@@TheGuitologist Seems like you didn't follow the SCREEN label with its down arrow over to the corresponding SCREEN up arrow label, which shows a resistor before the screens.
I have seen power reistors mounted like that pull traces off the board. I would stand them off supported by high-temperature silicone. Cool video. Excellent guitar. Your drummer is pretty good too ;-)
Hey Brad! Huge fan! I saw that scarred and yourself are having a build off with guitars. I haven't seen yours yet!
It's on the way. next coupla days it should be up.
@@TheGuitologist sweet! Looking forward to it!
Great job Brad. For what it is the construction of this amp is not that tragic.
I had an original Classic 30 Tweed (with the tube rattle) and that amp kicked serious ass. I later bought another that had some revisions and it didn't have the same sound.
I've had a US-build Classic 30 for 19 years or so, it's been all things considered a solid amp. It's my go-to especially for recording Wurlitzer electric piano, it really brings the bark out of the Wurly beautifully, internal build wonkiness notwithstanding. ;) Hard to complain about the rock'n'roll guitar tones it can provide...not looking forward to having to work on it though! (mostly work on Hammond/Leslie equipment.)
You have so much more patience than me!