Пікірлер

• 
  @RamenscooterАй бұрын

  Sounds good!

• 
  @ZerpersandeАй бұрын

  My used TU-12 has the same problem. Lights indicate ‘in tune’ but needle is flat. I don’t have a waveform generator. Pluck-adjust until it matches? I have a Yamaha clip-on sensor and a tuning fork?

• 
  @mevmevmevАй бұрын

  @@Zerpersande search youtube for a 440 Hz tone video and adjust using that. More accurate than plucking a string.

• 
  @MW-im6peАй бұрын

  I'm in need of a replacement power supply. Could you provide which one you are using?

• 
  @mevmevmevАй бұрын

  12V DC, 500mA (or greater), center pin is positive polarity.

• 
  @julianotaday2Ай бұрын

  Sempre quis ter esse

• 
  @princelysnail19983 ай бұрын

  I have a dd3 that works, however, the selector switch goes through all modes before it reaches the second “click”. Making it so I have to carefully turn the knob to where I need it, and hope it doesn’t move while playing. I have absolutely no experience with electronics but am wondering how hard it would be to fix this myself, or if I should just bring it in somewhere

• 
  @mevmevmev2 ай бұрын

  My guess is the control itself has a mechanical issue and would need to be replaced. Soldering would be required, but not hard otherwise. Finding a nee part may be difficult.

• 
  @TheBlackjacky314 ай бұрын

  Hi, Thanks for your post. I have a dd3 boss pédal and something strange happened. First, when i power on my pédal board, this pédal IS "on" when other pédale are Always ""off" before steping on thèm .... I don't know if it's normal 🤔 This pédal began to make crunch noise when activating it and désactivation it.... At thé same Time when activating it, my tube AMP fuse blowed, IS it possible according to you ? I triés this pédal with a classic 30 peavey and thé pédal only Works if you let your feet on it hold thé effect, but Nevers in on or off mode, it seems that thé Switch IS dead but Can this issue blow an AMP fuse ?? Thanks for your answer !!

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  @mevmevmev4 ай бұрын

  If the amp is all tube, it seems unlikely the pedal could cause the amp fuse to blow. Does the amp work after replacing the fuse? If amp is solid state, there is a chance an extreme transient from a defect in a pedal could damage a component in the amp which could then cause a fuse to blow.

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  @TheBlackjacky314 ай бұрын

  @@mevmevmev hi thanks. It's an AB763 super reverb type. We replaced thé fuse and it blowed at thé same Time i used thé pédal .... 30 minutes later. I tried it on a classic 30 and nothing Bad happened ...

• 
  @soapboxearth25 ай бұрын

  Am i correct in assuming that ifni get the same reading on 2 different 6v6 tubes, for instance, that they are 'matched' for use in a push pull guitar amp. Thanks for any insight. Ive asked this q on dozens of videos and have never gotten an answer

• 
  @mevmevmev5 ай бұрын

  I don't think so. This tested does not proved a high voltage to the plate as it would in an amplifier. I believe the preffered matching uses similar voltage as an amp and measures current.

• 
  @theophany17705 ай бұрын

  I have an MKII HD100 head that was incorrectly diagnosed having tube issues. Volume fluctuation and distortion cutting in and out. The power amp is good. Local repair shop finally came to conclusion that it's the digital board. They randomly tapped the board listening for different sounds . Nothing like what you're doing here. Supposedly they're an authorized repair shop. I think they basically guessed about the board knowing I wasn't about to throw much more into this money pit. Really wish I had your skills and could get ahold of an actual service manual. Great work man!

• 
  @ChrisMichaelsChicago6 ай бұрын

  I have a dd3a Made in Japan but it differs somewhat from the unit you repaired here, and with great skill I might add! I'm a player and have meager electronics skills at best. (wiring guitars is at times challenging), but I'm but only a guitar player with a huge problem. took it apart about 7 years ago or longer to swap out the jacks with some more sturdy switchcraft ones, using paper and pencil to make a diagram of what color wires went where, but lost it. Mine has the square Boss labeled processor on the back side of the PCB facing the under the bottom cover and the IC 6 appears to be a Mitsubishi M5M4464AL.IC. The main pcb# is 2292098401. I cannot read a schematic so I am stuck. Would you help me if you are so inclined.; Thank you good sir!

• 
  @brunnocariello88456 ай бұрын

  Great video! My tuner has a diferent trim pot. It's kind of square with a philips head on top. I was wondering if It's thare any philips wrench small enough to fit between the bottom of the VU metter and the top of the pot. It's So hard to reach. Thank you in advance.

• 
  @johnmacleod3776 ай бұрын

  I noticed that the needle shot up while you were tapping the tube this would indicate a fault would it not

• 
  @mevmevmev6 ай бұрын

  If I wasn't pressing any other button at that time. It should shoot up when pressing the quality button, but yes if it shot up just from tapping it would indicate either the tube has an intermittent connection or the tube tester socket contacts could also be loose.

• 
  @johnmacleod3776 ай бұрын

  Sorry didn't see you pressing the button at the same time while tapping

• 
  @mevmevmev6 ай бұрын

  No problem! I probably didn't describe what I was doing very well in the video.@@johnmacleod377

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  @ClaimOfRightMuso6 ай бұрын

  Thanks, pal. I checked out the rest of your video on Rumble (are we allowed to use that name here?) Also, I agree with your point on free speech - a pity KZread seem not to practice this.

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  @mevmevmev6 ай бұрын

  Thank you!

• 
  @ajnolp16 ай бұрын

  Does anyone know what value/wattage the replacement resistor was? I am assuming 1 watt but just want to make sure.

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  @mevmevmev6 ай бұрын

  R54 is a surface mount type and the package size mostly determines the power. I think it is an 0805 size This may be an option: www.digikey.com/en/products/detail/nte-electronics-inc/SR1-0805-5D1/11650917

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  @mevmevmev6 ай бұрын

  Full video is here: rumble.com/vl36fe-line-6-spider-valve-112-troubleshooting-and-repair-ep-003.html

• 
  @ajnolp16 ай бұрын

  @@mevmevmev Link sends me to a digikey 404 page unfortunately. I found it on another US based site. Seems difficult to find here in CAD.

• 
  @mevmevmev6 ай бұрын

  @@ajnolp1 here is the digikey part # 2368-SR1-0805-5D1-ND

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  @ajnolp16 ай бұрын

  Amazing. I had the same problem and almost threw the amp out. The exact same resisters and cap was burnt in my SV212 and since you did all the investigative work all I have to do is replace the parts. Thank you so much.

• 
  @mevmevmev6 ай бұрын

  Did it work?

• 
  @ajnolp16 ай бұрын

  @@mevmevmev Not sure yet. I'll let you know once I get the parts and replace them. Hoping there is no other issue.

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  @huntzilla360cave37 ай бұрын

  hey, so the turbo on my deuce is SCREAMING, not whistling.. like, you need hearing protection INSIDE the cab. im trying to identify which turbo i have, and make repairs to it, i saw you mentioned your model is a "D" and the "C" is louder.. how do i identify because the only numbers i could see were 159832 on the intake shroud

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  @mevmevmev7 ай бұрын

  In my repair log I have a note the D turbo I have is "MFR53591 (19207SOCN1235497)" The C turbo is loud, can hear it a couple blocks away, but shouldnt screech.

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  @mevmevmev7 ай бұрын

  C turbo example: kzread.info/dash/bejne/nKaorNijmLGfhM4.htmlsi=fQpWaOHMwPpj4_Uy

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  @mevmevmev7 ай бұрын

  Repair kit off ebay workes for my type D turbo. Search ebay for "Schwitzer 3LM-319 3LM-373 6N1521 Borg Warner Turbocharger Rebuild Repair Kit:

• 
  @huntzilla360cave37 ай бұрын

  @@mevmevmev alright, yea it must be a C, but the scream is definitely louder than when I originally got it. So I'm going to replace the couplings on the intake, and do a rebuild on it. I'm also thinking of putting a short muffler. Im about 60miles away and not going home for a few days, but I'm pretty sure the exhaust is 3.5in. if I put a 3.5in or 4.0in muffler it should not affect anything right?

• 
  @mevmevmev7 ай бұрын

  @@huntzilla360cave3 not sure about a muffler. If it sounds wrong you may want to do the rebuild kit before there is a major failure. Check out steelsoldiers forum. Many deuce owners on there: www.steelsoldiers.com/forums/the-deuce.20/

• 
  @TheCleaner69698 ай бұрын

  I heard this tester does not check EHX, GT or other Russian 12ax7 properly

• 
  @mevmevmev8 ай бұрын

  I can't think of a reason the tester would work on one brand and not another and I have tested many Russian 12ax7 tubes. That said, it wont test how "good" a tube sounds, microphonics, and some other parameters. The final test is installing it in the in the actual device, (guitar amp or other), and deciding if you like how it sounds.

• 
  @TheCleaner69698 ай бұрын

  @@mevmevmev Thanks for replying! The guy on ebay told me the following wgich is what is stopping me from buying it. I wanted the Orange VT1000 (I don't know if that does more then an emissions tester) These are the tubes he said it won't test. I mainly wanted a tester to see the condition like the VT1000. Please correct me if I'm wrong & the VT1000 is more of a mutual conductance tester. 1- Grove Tube Gold 12AX7(A) on box but -R on tube. Made in Russia 2- Tung-Sol 12AX7 Made in Russia 3- Sovtek 12AX7LPS Made in Russia​

• 
  @mevmevmev8 ай бұрын

  @@TheCleaner6969 VT1000 looks like a more convinient tester for the common audio tubes. The Dyna Jet does way more tube types than the VT1000 but that includes old tv and radio tubes, which just adds clutter to the tester if you only need to tesr guitar amp tubes.

• 
  @TheCleaner69698 ай бұрын

  @@mevmevmev It was but they no longer make it. I found a B&K 747 for $260.00 but I don't know how bad it is. The guy said one blub is out. So I'm one the fence. Any advise?

• 
  @LEON4PRES9 ай бұрын

  Anyone still have this amp? I know it's got master volume and overheating problems. Is it worth fixing?

• 
  @shubakah9 ай бұрын

  Hi there I have the same issue with my Can you fix my amp..? Thanks

• 
  @MaybeMyBad011311 ай бұрын

  なんの話をしてるから分かりませんが、あなたがDD3を愛してる事は伝わりました。

• 
  @stevewells558011 ай бұрын

  A church called me about their Yamaha EMX 312sc that quit working after an electrical storm. Same symptoms, so I studied your video until I was fairly confident that the same thing was happening here. Replaced the same two components and it came back to life! But then I discovered that, although the preamp seems normal, there is no output from the "B" output (monitor side), only the "A" side (mains). So, I'll get back to work and try to figure that one out........unfortunately without a helpful video like yours. Thanks so much for sharing your expertise!

• 
  @tubathecoolkid6919 Жыл бұрын

  Mine works but one of the sliders broke off how would I replace it

• 
  @mevmevmev Жыл бұрын

  It is a lot of work for 1 slider. Remove all front panel knobs, remove the front panel PCB from the panel. Desolder the slider. Install new one and reassemble.

• 
  @pneumatica3 Жыл бұрын

  Never mind on the share the schematic request. I found the reply to the question from @julioboscher. Thanks

• 
  @pneumatica3 Жыл бұрын

  Will you share that schematic? I have one that malfunctions in a different way.

• 
  @mevmevmev Жыл бұрын

  www.8bitsindgenug.net/boss_dd2.png

• 
  @worldwide1376 Жыл бұрын

  Well, that's pretty disappointing. I have one of these and your test just showed that it missed several bad tubes, what good is this tester then? Also, what does the "Quality" setting measure? Thanks for posting.

• 
  @mevmevmev Жыл бұрын

  I believe it is the current flowing out of the plate. That is why it takes time after you first plug in the tube and shows nothing until the filament warms up the cathode which allows the electrons to jump from the cathode to plate. Without this working, the tube won't be able to amplify so at least the tester shows if the main function of the tube is working.

• 
  @julioboscher Жыл бұрын

  Hi, Thank you for this video. I'm facing the same problem but I don't have the schematics. Could share it or tell me where to find it?

• 
  @mevmevmev Жыл бұрын

  www.8bitsindgenug.net/boss_dd2.png

• 
  @mevmevmev Жыл бұрын

  If link doesnt work. Search for "boss dd3b" and look at results images. I cant seem to find the actual service manual niw.

• 
  @HiMATE626 Жыл бұрын

  Any chance the original speaker has a trick to removing it? I have one that can also use D batteries and can’t work out how to get the speakers out without damaging the case.

• 
  @mevmevmev Жыл бұрын

  I think it just pulled straight up including the black plastic parts. There was probably some glue holding it in. Once out there are some screws holding the 2 black plastic parts together.

• 
  @djrkofficial9210 Жыл бұрын

  Upna numbar do

• 
  @mandoramos6062 Жыл бұрын

  Very thorough. Thanks. I have the same unit but the amplifier section is not working. Hopefully it's something simple

• 
  @johnmcglough575 Жыл бұрын

  Thanks for putting this on here. I have a 212 version with the same problem. I left R53 in place as it was still reading OK. I changed the capacitor, and its now working again.

• 
  @mevmevmev Жыл бұрын

  Good to hear, thanks for report!

• 
  @petericho716 ай бұрын

  my R53 measured good and I thought I'd try changing C20 however this didn't fix it. It also appears someone else has had a go at repairing that pcb as it is now mounted in upside down and the ribbon cables have been shortened. I would like to find an old donor amp to replace that pcb.

• 
  @NegativeBodhiImage Жыл бұрын

  Someone just gave me one of these, thanks for the info!!

• 
  @CarlosRuiz-cn6wh Жыл бұрын

  I was using the new TinySA Ultra when the screen suddenly “froze”. It does not allow me to select anything, and there’s no signal viable on the screen. Any idea on what could have caused this?

• 
  @mevmevmev Жыл бұрын

  Go to the tinyss iogroups forum and ask. The guy that designed it often replies and would likely know. groups.io/g/tinysa/topics

• 
  @CarlosRuiz-cn6wh Жыл бұрын

  @@mevmevmev Thank you, i’ll do that.

• 
  @charlieburns1385 Жыл бұрын

  Can't tune half step down? Only up?

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  @mevmevmev Жыл бұрын

  It auto detects notes so it can do half step up or down.

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  @Suunder Жыл бұрын

  i have a vintage electric mistress v2 from 76 and i have problems with it do you know how to fix it i could send you a video

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  @giovannimercado3704 Жыл бұрын

  Awesome!

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  @BSAT10 Жыл бұрын

  Thanks for all your hard work on the video and well done fixing the beast

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  @jacoboovalle8546 Жыл бұрын

  Hi nice video! I've a similar problem my amp main input jack makes crackling and sound loss but the power amp in works fine, I've recently buy all new tubes including preamp's. I don't know what else I can do any advise?

• 
  @vintageradioman Жыл бұрын

  Can you fix mine please?

• 
  @shredding51 Жыл бұрын

  I have the MKII and it has sound when plugging into the power in, but no sound in the input jack. But all my lights are on and everything else seems to be fine. Just no sound through input jack. Have any suggestions? Thanks

• 
  @mevmevmev Жыл бұрын

  The input jack is part of a small pcb assembly which I think includes an op-amp. My first guess is the input jack itself has mechanical damage, its solder joints to the pcb cracked, or the op-amp failed. If the failure was gradual/intermittent, likely the input jack. If it went from fully working to not working, more likely the op-amp.

• 
  @shredding51 Жыл бұрын

  @@mevmevmev Thanks man! the solder joints look fine. It did just stop woking all at once. I can't find a replacement input jack anywhere. Any Suggestions?

• 
  @mevmevmev Жыл бұрын

  @@shredding51 Nothing simple. I would inject a signal and trace it with an oscilloscope to see if it makes it out of the input jack pcb assembly. You could replace the op amp and hope that is the bad part, but even that requires surface mount soldering skills.

• 
  @shredding51 Жыл бұрын

  @@mevmevmev i think ill just try and find one of those input jacks. So far not much luck finding one.

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  @atakdragonfly1675 Жыл бұрын

  Video has no sound?

• 
  @mevmevmev Жыл бұрын

  Video has sound. You could try the rumble link to the full video in the description.

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  @ezekielworth6648 Жыл бұрын

  I recently rescued a 1964 sc543, this is rather similar. The cabinet was destroyed, but the speakers were intact and amp looks like it should work, still had all the original tubes. Did not have the actual record player, but I have one. Harvested a different but similar cabinet to put the Sylvania into if I can get it working

• 
  @JeremiahDsilva Жыл бұрын

  Hi. Im facing a very unique prob with DD3. Whenever i turn the knob to the 800ms , i get a thumb that repeats itself which goes on forever. Doesnt happen with the medium and short delay..Only the long delay as soon as the knob is selected. Any idea what could be causing that

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  @michaelmosley1385 Жыл бұрын

  I need you like right now. I have this unit and just figured out where the fuse was checked it and it was blown replaced it still no power. wish I can get it fixed

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  @JanKowalski-vh1rg Жыл бұрын

  Get fix it (my music teacher have this powermixer and it is real beast)

• 
  @AntonioGrazioli Жыл бұрын

  I just got an half working DD-3... Sound comes thru if the pedal is off When the pedal is ON, no light on the Led and no Delay... but....if I put it into "HOLD" mode and I press the pedal the led lights up and the sound is delayed indefinitely until you release the pedal (how it is supposed to work) Any hint on what and where to loook at? thanks

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  @mevmevmev Жыл бұрын

  I would first check the mode switch solder joints and the wires that connected between it and the main PCB for breakage. 2nd the switch itself could be damaged. 3rd, IC9 is a possiblity as it appears to only be used for the modes other than Hold. Beyond that it gets more complicated. Could do diode checks on the diodes and transistors that connect to the switch.

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  @AntonioGrazioli Жыл бұрын

  @@mevmevmev Thanks a lot, your are really helpful hints. I will definitely have a look into it this afternoon :-D thx a lot!

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  @eucarloshenrique1 Жыл бұрын

  ​@@AntonioGrazioli did you solve the problem?

• 
  @rapsod1911 Жыл бұрын

  Do you know what is min freq step between 2 data points? (Basically what is freq synthesiser min step?)

• 
  @cesarbarrios13782 жыл бұрын

  Donde consigues las partes?

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  @mevmevmev2 жыл бұрын

  bigmikesmotorpool, secoparts, easternsurplus, possibly a couple others I can't recall.

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  @jhoniirawan21722 жыл бұрын

  I have a dd-3 sound can come out, but for the delay it can't even though the LED is on. and for the voltage everything is normal. Please help

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  @marioterror42062 жыл бұрын

  👏👏👏👏👏👏👏👏👍👍👍👍👍👍👍👍👍👍🇧🇷

• 
  @Lovelydeck2 жыл бұрын

  I just got one of these! The volume works out of both sides but is really quiet. I opened it up and it doesn’t look like anyones ever messed with it before. I’m thinking it’s an issue with the amplifier. Any tips for working on this bad boy would be great!

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  @mevmevmev2 жыл бұрын

  Usually if an amplifier fails it is not just weak output but no output or very distorted sound. I would plug in headphones to see if that output works. If it does, it may be the switching contact in the headphone jack which mutes the speakers is not making contact when the headphones are unplugged. Sometimes just plugging in and unplugging multiple times can self clean the contacts enough to work for a while. Also, toggle the function switch back and forth for similar reasons..

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  @Lovelydeck2 жыл бұрын

  @@mevmevmev after some further exploration and trying the headphone jack as suggested we noticed that adjusting the volume knob only changes the right channel whether using speakers or headphones. Still very quiet.

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  @mevmevmev2 жыл бұрын

  @@Lovelydeck Based on that, I think it is very likely the main volume control. Mine was in bad shape even after cleaning. I just replaced it and now the left and right are very stable. The original part may be impossible to find. I ended up having to replace it with one that doesn't have an on/off switch. Now to turn it off I have to unplug power supply, though I could add a dedicate power switch. One way to test if the amplifier works: There is a gray and black cable on the connector at the upper left of the screen at 4:38 in the video. The red wire from each is the left and right source audio signal, and the white from each is the left and right input to the amplifier. The orange and brown wire turn the power on when shorted together. You may be able to test the left channel by turning up the volume, then shorting the red and white wire coming out of the gray cable. It should force signal to the amplifier. If it works, that would confirm the volume control is bad. If it doesn't work it may actually be the amplifier circuit is bad. Basically a lot of work for a cheap radio, but it looks nice!

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  @dermotgilmartin18182 жыл бұрын

  Hi im looking for a line 6 75watt circuit board code no 50-02-0335 tryed thomann and another American site but can't locate the part , can you possibly help me please?

• 
  @mevmevmev2 жыл бұрын

  For an entire PCB, I would guess the only options would be contacting Line 6 directly or finding one from another amp.

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  @dermotgilmartin18182 жыл бұрын

  @@mevmevmev hi , ive tryed they won't deliver to my country Ireland. A pain

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  @aztecworrior792 жыл бұрын

  How do you go about replacing the regulators my line 6 only has one regulator and it’s split right in half breaking it right through the middle causing my amp to have no sound thanks for the video and I was just wondering where could I go about ordering one of these parts I’m kind of trying to stay away from the repair man, that is a little expensive

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  @mevmevmev2 жыл бұрын

  Is it a Spider Valve 112 amp? If yes is it the MC7805 shown at 6:29? or the LM1086 shown at 7:20? or other? These options would likely work, however it is possible something else is also damaged which could cause the replacement part to fail. For this reason I often buy more than 1 replacement. If you are not familiar with how to safely work on high voltage tube amps. Learn that first.. Digikey part number for the 7805: MC7805CT-BPMS-ND Digikey part number for the LM1086: 2156-LM1086CT-ADJ-ND The 7805 gets very hot. I have a heatsink mod video to help increase the 7805 lifespan: rumble.com/vlnc5f-line-6-spider-valve-112-custom-5v-regulator-heat-sink006.html

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  @LEON4PRES7 күн бұрын

  Is there a way to bypass the effects completely, and just make it a plain pre and post tube amp?