The Sort of Repair I Usually Reject - Solid State Acoustic Amp, Full of ICs, No Schematic

Ғылым және технология

It's never fun opening up an amp full of Integrated Circuits (ICs) without a schematic. But here goes... let's fix this Dean Markley KVC-60 Acoustic Guitar Amp...or at least attempt to.
Note: hidden within today's video is a numerological message to my Masonic brethren. When the time is right, you'll know what to do.
Check out our sponsor, Native Sons Goods:
www.nativesonsgoods.com/
/ nativesonsgoods
/ nativesonsgoods
WAYS YOU CAN SUPPORT THIS CHANNEL:
Like, Share, Subscribe, Tell Your Friends, Stand in the Middle of the Street Naked Screaming "LONG LIVE THE GUITOLOGIST"!
OR
Send an unwanted piece of gear or Donate via Paypal: bradlinzy@gmail.com
Make a Banggood purchase through this affiliate link: goo.gl/Ffhjwf
Thanks for your support!
STUFF I USE
-5A Variac: amzn.to/2FNWthU
-Fluke 87: amzn.to/2DwHjvr
-Yotec 936 Soldering Station: goo.gl/85Mu1S
-Sealody SSA51 soldering station: amzn.to/2DJTS7P
-Black and Decker Heat Gun: amzn.to/2DWpDhr
-Geekcreit® LCR-T4 Mega328 Transistor Tester goo.gl/g9CTrA
-HT02 Handheld Infrared Thermal Camera goo.gl/3K94aQ
-Solderless Breadboard: goo.gl/GNwNpD
-Breadboard Jumper Wires: goo.gl/MPRSQP
-Geekcreit® XR2206 Function Signal Generator DIY Kit goo.gl/5pvvVG
-Contact Cleaner: amzn.to/2FVitro
RECORDING
-JVC Everio Camcorder amzn.to/2HF172t
-Andonstar USB Microscope: bit.ly/2q8QIWz
-Articulated Boom Arm with Cam Mount: amzn.to/2Hlo2AX
-EV 635A Omnidirectional Dynamic Mic amzn.to/2pR8HQT
BOOKS
-RCA TUBE MANUAL amzn.to/2GOBVqS
-DESIGN AND CONSTRUCTION OF TUBE AMPLIFIERS: amzn.to/2HSNMne
-Designing Tube Preamps for Guitar and Bass: amzn.to/2DK5tmt
2006 FENDER AMERICAN STD TELECASTER PICKUPS
-TV Jones Magnatron Neck: amzn.to/2q1zQjD
-Seymour Duncan Vintage Stacked Bridge: amzn.to/2GyZjrK

Пікірлер: 340

  • @Medicated1
    @Medicated16 жыл бұрын

    Holy shit, you sang that like you wrote it!!!! You never fail to impress the hell out of me Brad!

  • @andyfairman7812

    @andyfairman7812

    6 жыл бұрын

    Totally agree! Awesome job Brad!

  • @seanlavery2236
    @seanlavery223621 күн бұрын

    I love the fact ive been watching you so long i can watch a video from 6 years ago like its brand new. Such a wealth of info throughout the Guitologist library. Thanks Brad! You still continue to inspire and inform me each and everyday! Started watching you in 2015! Thank you my man!

  • @lroy730
    @lroy7306 жыл бұрын

    Nice agressive Doors cover !!!!!\m/!!!!!

  • @johnfishleigh9627
    @johnfishleigh96276 жыл бұрын

    Oh no! Another bad solder joint. I ran into my first today. A garage sale garage door opener for $30 . Intermitently shut off so i hit it w ith a paddle when it fails and has worked for the last 9 months. Now that weather is better took a look at it. Nothing visible but pushing on circuit board made it work. I suspected the connector and cleaned and bent pins to no avail. Gave up and reflowed all larger solder joints ( for relays and connectors ). There was no sign of a cold solder joint but now works perfect. I never would have done that except for all your bad solder videos. Thanks for the good show

  • @witeshade
    @witeshade6 жыл бұрын

    If the lights are super bright, one thing you can try is to turn them around and have them reflect off the walls or ceilings. You can put some white paper or foam core up to help the reflection. You get softer and more diffuse light, which might be more comfortable and better for shadows. Kinda works like a big softbox but more convenient.

  • @AMStationEngineer
    @AMStationEngineer6 жыл бұрын

    For what it's worth, Brad, I enjoyed the hell out of this video. "Love me two times", was spot-on, and a great bonus! I'd have probably completed the repairs in much the same manner that you did, boxed it up, dragged it to the UPS shipper, then turned around after deciding that (under an anal-retentive impulse) I needed to build and install a custom wiring harness, and add a new set of Eminence speakers, and Radian horns, and while I was at it, juice the outputs a wee bit (I didn't know that they manufactured semiconductors in Morocco). Then I'd have lost my tail on that repair! For two years, '78, and '79, (and maybe a little of the way into '80), Weller -- Xcelite made a set of nut drivers (5/16 thru 11/16) for potentiometer removal and installation. They were equipped with really high-end Silastic seats for the shafts, and a 1-ounce tube of silicone conditioner for the seats. They were $35.00 per set (pricey), but surely would have come in handily with this project.

  • @jamsguitar
    @jamsguitar6 жыл бұрын

    Watched several of your vids and you're very knowledgeable, but seeing you perform shows where your heart is at and where your inspiration really comes from, very cool. Cant say this about too many youtubers but I rang your bell. =)

  • @michaelmitchell5909
    @michaelmitchell59096 жыл бұрын

    Dude, a million thumbs up for the song at the end!!!.... U did Jim proud my brother!..... Loved it man!

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    I was a dead Indian in a past life.

  • @umajunkcollector

    @umajunkcollector

    6 жыл бұрын

    and Robby!

  • @michaelmitchell5909

    @michaelmitchell5909

    6 жыл бұрын

    The Guitologist ....awesome response man!.... Funny shit!

  • @marknash7113
    @marknash71136 жыл бұрын

    Nice job chasing those circuit board gremlins down. Love hearing the acoustic playing and great tribute to Jim. Dig the new mic setup! Sounds good. Headphones on boys!

  • @w13rdguy
    @w13rdguy6 жыл бұрын

    Sounds good. You can usually figure out those iCs if you're lucky enough to find the number still legible on them. You can then look up what voltage belongs on what pin. Also you can check how hot they are on the surface to get one more clue. (Knowing Brad knows this, for the viewers.)

  • @mstecker
    @mstecker6 жыл бұрын

    There's something about the chords at the turn that slay on this song - and you nail it.

  • @MrGTO-ze7vb
    @MrGTO-ze7vb6 жыл бұрын

    Very good Brad..!! That electronic microscope has opened a new avenue in problem solving.! Love The Doors... didn't know you were the second coming of Jim Morrison..!!

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    Actually, I was Jim Morrison. Don't tell anybody. I don't want to be hounded by groupies.

  • @mooseteets
    @mooseteets6 жыл бұрын

    still loving the vids, you've really upped your game with the new equipment, i like it :D

  • @johnwardle9667
    @johnwardle96675 жыл бұрын

    Great video Brad!!!! The content balance of technical amplifier work and then a performance to match the style of amp that's been across the healing bench. Superb!! Big love from John in London, England.

  • @KevinBingham
    @KevinBingham6 жыл бұрын

    Love the titles at the end for "Love Me Two Time" and "Washburn Dumpster Guitar".... and a great cover of the song! Keep up the goodly work!

  • @garymanis6305
    @garymanis63056 жыл бұрын

    Hey man, thanks for the video. It helped me identify a pair of circuit boards I received in the box with my Fender Cyber Twin chassis. The previous owner thought they were from a Marshall. They are identical to the boards in that Dean Markley. Mystery solved.

  • @BrewerShettles
    @BrewerShettles3 жыл бұрын

    Took my Peavy Backstage Plus 35 W Amp apart - cleaned the circuit board (QTips soaked in liquid soap + water) - looked at all solder joints - applied a few drops of liquid flux / resoldered four (4) joints holding the Guitar Input switch to the circuit board + bent in the metal tip part of the switch to make sure contact happens when guitar cable is inserted. Resoldered one of three wires from the transformer to the board. Fixed!!!!!! Including Spring Reverb!!! Thanks for making this video!! Good aggressive Doors Jam. Still might need a new switch but at least it works!!

  • @dlunsford1980
    @dlunsford19806 жыл бұрын

    I have been doing work for a consignment music store here in town and this type of gear is 90% of what I repair. Not near as fun as the old tube amps but it does force you to get creative with troubleshooting since schematics are almost always unatainium.

  • @paulwyer3397

    @paulwyer3397

    6 жыл бұрын

    dlunsford1980

  • @eldredjoyner2556
    @eldredjoyner25565 жыл бұрын

    I have a Dean Markley combo. I like it a lot for a solid state amp. This amp when working must sound good. If I saw this amp, it would be an easy sell. Man, I love this channel! Thank You Brad!!!

  • @sandyeloff9678
    @sandyeloff96786 жыл бұрын

    Hay Brad, I love watching you videos . they take me back to 1969 , when I was repairing and building guitar amps. growing up, my room was nothing but guitars and electronics. funny you do things almost the same way I did. you do need a set of nut drivers, lol. now I mostly build and repair guitars and condenser mics. still love tubes. good work, thanks steve

  • @douglasader2458
    @douglasader24586 жыл бұрын

    That looks like a 22 bird shot round! I was an auto electriction 17 years have seen live rounds in fuse boxes before. Fun when you have a repeat bad short. Love your videos. Keep it up! From Doug

  • @barrychristiansen4579
    @barrychristiansen45796 жыл бұрын

    all right Brad you got me laughing off my rocker. lol. rather well done for an ol tune i was delivering papers to door steps when that one hit the charts.lol

  • @TheElrondo
    @TheElrondo3 жыл бұрын

    Even it's an old vid, i luv it. Still have that same Amp sitting somewhere. I also own a Dean Markley K75 guitars Amp, wich was one of the best designed Sud State amps back in it's time. Dean Markley made some real well made stuff, way ahead of the Fender solid state amps back in the early 80s, i still have it as a kind of backup and it takes pedals well.

  • @Ron_Padgett
    @Ron_Padgett6 жыл бұрын

    Nice man! Great performance at the end!

  • @daviddunkin7454
    @daviddunkin74542 жыл бұрын

    Dude, never mind your repair ability, great cover of the doors!

  • @kristopher6031
    @kristopher60315 жыл бұрын

    Brad live at The Bench. We need a DVD!

  • @jessemontano762
    @jessemontano7623 жыл бұрын

    Hell yeah. Excellent cover doors one of my favorite bands

  • @barnabywilde374
    @barnabywilde3742 жыл бұрын

    just today i opened a customer's (bad audio) Bogen GS-100D amplifier ... it's not only all ICs, but they're of the SURFACE-MOUNT variety! Glad i'll be retiring next year.

  • @jeff7807
    @jeff78076 жыл бұрын

    Great video Brad

  • @SentientSeven
    @SentientSeven6 жыл бұрын

    Glad I stuck around to the end, that was fantastic :)

  • @Abombsucksalot
    @Abombsucksalot6 жыл бұрын

    Love your content man especially the repair vids

  • @steveparkes1
    @steveparkes16 жыл бұрын

    Love it!! great song and performance.

  • @scottm121
    @scottm1216 жыл бұрын

    AWESOME man.. love the outro too. Haha cheers from victoria

  • @EdDanaGuitar
    @EdDanaGuitar6 жыл бұрын

    Ha! That was super interesting! I dig the microscope! Love Me TWO TIME LONG TIME! I'd advise them to replace those crazy speakers!

  • @STAY-GOLD-VINYL
    @STAY-GOLD-VINYL6 жыл бұрын

    Very cool Doors rendition!!

  • @mal2ksc

    @mal2ksc

    6 жыл бұрын

    I don't think he stopped to check if the last phrase was in his (non-falsetto) range or not before he started, though. I don't think his throat appreciated that very much.

  • @williambock1821
    @williambock18216 жыл бұрын

    I had fun sitting in the pot and playing triplets along with your love me two times rendition! Densmore triplets are always a blast.

  • @deepwater2652
    @deepwater26526 жыл бұрын

    Great trouble-shooting vid and BONUS performance from the Guitologist!

  • @kerrybayton8356
    @kerrybayton83566 жыл бұрын

    your full of surprises.. I enjoyed that very much..

  • @hogie1259
    @hogie12596 жыл бұрын

    5 thumbs up for the performance Brad!

  • @Nazzz65
    @Nazzz655 жыл бұрын

    I said it before and I'll say it again you've got a really good voice man. You should do some more tunes on your channel. Nice Doors cover!

  • @paulkerr2298
    @paulkerr22986 жыл бұрын

    and that is why the lizard king never really died.. loved it mate,, made my day.... encore, encore. keep well dude

  • @lousekoya1803
    @lousekoya18035 жыл бұрын

    Awesome !!!...................Love your channel !!.....Great singer by the way !!

  • @kevinshea4776
    @kevinshea47762 жыл бұрын

    Jim Morrison is alive! Nice troubleshooting video without documentation.

  • @TheGuitologist

    @TheGuitologist

    2 жыл бұрын

    Hahaha like that huh? Maybe one day ill show the video of me in my high school days impersonating Jim at a poetry slam! 😂

  • @01left
    @01left3 жыл бұрын

    Man what a Great Voice !! Love it

  • @bessiebraveheart
    @bessiebraveheart5 жыл бұрын

    Hi from England, go on son, make em have it.

  • @francisskundaliny1295
    @francisskundaliny12956 жыл бұрын

    great performance brad-rockn rolly!

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    Thanks, Francis.

  • @DavidBrown-it9ig
    @DavidBrown-it9ig6 жыл бұрын

    Ahh Dean Markley amps! I remember testing them out at my local music store when they first came out. I remember the 60 and 120 watt tube heads sounds pretty good. They pushed them pretty hard for a while then they just faded away.

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    I don't remember the tube heads.

  • @DavidBrown-it9ig

    @DavidBrown-it9ig

    6 жыл бұрын

    I think Sammy Hagar used them for a bit.

  • @tonepilot
    @tonepilot6 жыл бұрын

    Love the passion.

  • @SkyscraperGuitars
    @SkyscraperGuitars6 жыл бұрын

    Well, sounds like you nailed it. Hopefully that does the trick. I enjoyed the microscope portion of the show.

  • @johnthrelfall5
    @johnthrelfall55 жыл бұрын

    Great video , and very popular! Good educational video for technicians and guitarists.

  • @jcspaziano
    @jcspaziano6 жыл бұрын

    Smashing that Doors tune man!!

  • @imdais
    @imdais6 жыл бұрын

    Loved the performance!

  • @yigithicylmaz774
    @yigithicylmaz7745 жыл бұрын

    chorusing white noise is so beautiful.. should definitely use on my new post metal album...

  • @telecasteroil
    @telecasteroil6 жыл бұрын

    Great closeups and pretty decent audio . Cheers from NY

  • @jimhough6233
    @jimhough62336 жыл бұрын

    YOU ROCK, BRAD!

  • @alecjahn
    @alecjahn6 жыл бұрын

    Loving the microscope setup. I don't envy you for diving into this one. Whew!

  • @alecjahn

    @alecjahn

    6 жыл бұрын

    Also didn't expect that rear speaker on there. Reminds me of the passive radiators on the backs of some old Klipsch stuff.

  • @nellayema2455
    @nellayema24556 жыл бұрын

    Looking for an open guitar case where I can toss in a dollar or two. Good performance at the end!

  • @richardturk7162
    @richardturk71626 жыл бұрын

    Well done Brad .

  • @NitroModelsAndComics
    @NitroModelsAndComics6 жыл бұрын

    Killin it as usual brother.

  • @mischef18
    @mischef186 жыл бұрын

    Yup it works. Nice bit of wrench'n there bro even though it is electronic, song did not put me to sleep anyway, the doors rattled a bit, lol. ATB

  • @JustChiminin
    @JustChiminin6 жыл бұрын

    Damn, now I feel like listening to the recording . . nice job!

  • @icenesiswayons9962
    @icenesiswayons99625 жыл бұрын

    You do yourself proud, 2 thumbs up!

  • @jdbertel33
    @jdbertel336 жыл бұрын

    Goddamn Brad. Hell of a cover there!

  • @thePsychoDuddy
    @thePsychoDuddy6 жыл бұрын

    haha, the doors thing rocked.

  • @johnstitt2615
    @johnstitt26156 жыл бұрын

    A repair and a tune. Nice.

  • @captainsparky
    @captainsparky6 жыл бұрын

    Dude.... You've got a great voice

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    Thanks man. It does alright for most rock stuff. I doubt I'll be winning any TV talent shows with it, but who cares about that anyway.

  • @movinginstereo40
    @movinginstereo406 жыл бұрын

    Ahhhhhhhhh, The Lizard King Lives in Brad’s basement. That was bitichin. Thanks for posting the vid. Curtis

  • @rmakela27
    @rmakela276 жыл бұрын

    Good day. Thanks for the great videos. Constructive feedback, maybe keep the blinding work bench light off when the camera is on you and your workspace. I still see spots 😊

  • @justinbouchard
    @justinbouchard6 жыл бұрын

    Sometimes when you are doing some shredding on electric after a repair, I'm thinking....Bradley Govan... Lately with the acoustic and singing your just deadly. Tons of Canadian bush love to you brother.

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    haha..."Bradley Govan" made me laugh. that dude is on another planet.

  • @justinbouchard

    @justinbouchard

    6 жыл бұрын

    Lol, I know but sometimes your legato shred is pretty effing amazing man!

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    I think I could use me some of that "Canadian bush love".

  • @justinbouchard

    @justinbouchard

    6 жыл бұрын

    Oh buddy. You better take your wife camping one summer up here. Bring her back to a commonwealth country and the bush love will be unstoppable

  • @michaelreis8266

    @michaelreis8266

    6 жыл бұрын

    Love the Doors and the flashbacks they bring, great song choice Brad! I don't know who Bradley Govan is and you totally lost me at Canadian Bush Love!! But I ain't picky i'll take em bushy or bushless LOL

  • @youbecha64
    @youbecha646 жыл бұрын

    I enjoyed the Doors at the end!

  • @GtrMan863
    @GtrMan8636 жыл бұрын

    nice work on the repair and the song

  • @mrc6032
    @mrc60325 жыл бұрын

    That doors cover was awesome!😀

  • @weaesq
    @weaesq6 жыл бұрын

    The chips are likely to be operational amplifiers (op amps) in analog filter circuits.

  • @toddjones5382
    @toddjones53825 жыл бұрын

    You are a hoot brother.. Great job!

  • @TheGuitologist

    @TheGuitologist

    5 жыл бұрын

    Thanks, Todd

  • @eetechtom
    @eetechtom6 жыл бұрын

    Love that “fuse”, and I thought gum wrappers were bad. Sheesh

  • @pamparitas
    @pamparitas6 жыл бұрын

    souds nice :) a year ago i recap a litle K15 sounds nice for a small transistor amp

  • @chrisjeneson5091
    @chrisjeneson50916 жыл бұрын

    Well worth watching if only for the version of Love me two times! Thanks Brad.

  • @DG-ic9ub
    @DG-ic9ub6 жыл бұрын

    Nice Doors jam, sounded great

  • @audiotechlabs4650
    @audiotechlabs46506 жыл бұрын

    Take a breath! What a great song to end the night with! Great cover! Your bench test was a success. The up-close camera beats just a lighted magnified light. Good repair? Thanxz

  • @stavrost6559
    @stavrost65596 жыл бұрын

    Hehe thumbs up for the song man! Thanks for your video

  • @thespiritof76..
    @thespiritof76..3 жыл бұрын

    I hadn’t thought of that in years, but every house I lived in until I got married had a fuse box. Some were glass screw ins, the larger amp fuses were like 12, gauge shotgun shells that were brasses on both ends... the 220 outlet seem to use a pair of those

  • @k7jbl157
    @k7jbl1575 жыл бұрын

    Great job...Jim. ;-)

  • @imannonymous7707
    @imannonymous77075 жыл бұрын

    Now , see this is the start of a ton of acoustic electric guitars hitting the market in 90s ...and for an acoustic player who didnt know much about amps anyway, this looked like a pretty fair deal... 25 years later we know better

  • @Savage_Riffz
    @Savage_Riffz6 жыл бұрын

    Dude why are you not doing guitar covers on KZread? I love your content and would watch your covers whenever you put them out. Killer doors cover man!

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    I put a bunch up when I first started doing YT. No one ever watched them.

  • @bryandraughn9830
    @bryandraughn98302 жыл бұрын

    I wish I could have you working on one of my amps so you might take a look at this other one. It's a Yamaha "fifty" 112 and just goes fft....fft....FFFFFTTTTTT!!!!! lol! for now, it's a spare speaker. ill get into it someday. It's pretty old, but it looks like a killer amp! Great videos man!

  • @1980bwc
    @1980bwc6 жыл бұрын

    Love hearing me some Morrison. The dumpster special turned out pretty groovy.

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    Headstock's still hanging in there!

  • @jfjoubertquebec
    @jfjoubertquebec6 жыл бұрын

    2:23 "for your coffee-house gigs or whatever"... exhales conspicuously....

  • @TheGuitologist

    @TheGuitologist

    6 жыл бұрын

    *snaps*

  • @Mojoman57
    @Mojoman576 жыл бұрын

    Your stuff just keeps getting better and better. You should totally have a Patreon account. You don't even have to promote it, just have it there. You content is easily worth a dollar an episode.

  • @jimbeaux4988
    @jimbeaux49886 жыл бұрын

    Loving the microscope.!

  • @MHM1975
    @MHM19756 жыл бұрын

    Excellent!

  • @stevecooper3487
    @stevecooper34876 жыл бұрын

    Awesome dude!

  • @eaze78
    @eaze786 жыл бұрын

    Awesome rendition of the Doors.

  • @JohnIainMcFarlanewaspfactor
    @JohnIainMcFarlanewaspfactor5 жыл бұрын

    Brilliant!thanks for that bro.

  • @rockinchairboogie3222
    @rockinchairboogie32226 жыл бұрын

    Brad, I really enjoyed the video (as I always do), I have an recording studio and let me suggest a Rode tube mic. The NT-1 is very good and it won't break the bank either. It is under a grand, around 600. or 700. and it is what your looking for bro. Good job on the song. I'm not a big Doors fan but I really liked your version of it. Take care... Jeff G.

  • @larrydering1598
    @larrydering15985 жыл бұрын

    Nice work on this. Love that microscope. Cool Doors cover.

  • @JasondeCordoba
    @JasondeCordoba6 жыл бұрын

    dude nice tune there!

  • @scottriddle5468
    @scottriddle54686 жыл бұрын

    Ha ha good tune man . Watch out for the snapping snatch.

  • @nevanet
    @nevanet6 жыл бұрын

    Great version of Doors there! I play that song with my girl friend quite often :)

  • @phil36135
    @phil361356 жыл бұрын

    Very nice!

  • @farmallpaul4518
    @farmallpaul45186 жыл бұрын

    You rock! Come back and tell us how the extra speakers were wired?

Келесі