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recap and restoration

  1. J

    Should I change the main filter cap of MC2255 if capacitance below 20% tolerance but ERS is good?

    MC2255 amp two main filter capacitor is originally rated 38,000uf and current measurement of these capacitors are 28,000uf and 29,000 uf which are below 20% tolerance. ESR value is 71 milliohms. I was told that the capacitance value is not the only factor to replace these capacitors but also...
    • jervz
    • Thread
    • main filter capacitors mc2255 recap and restoration
    • Replies: 0
    • Forum: McIntosh Audio
  2. J

    MC2255 main capacitor

    I understand that the main capacitors of a MC225 amp usually last. The two big capacitors at the back were measured and capacitance are 28.5k uf and 29k uf. May I know if these values are outside the tolerance or out specs and needs to be replaced? Appreciate your feedback.
  3. S

    Yamaha CR-2020 Stuck in Protection Mode

    I am lost trying to figure out why this Yamaha CR-2020 will not come out of protection mode and can use some help and encouragement. As a noob hobbyist, I have replaced recapped the unit and replaced the ecap and relay boards. The triac mode and Secant's FR riser board is all added. Some...
    • SharkBait07
    • Thread
    • recap and restoration receiever yamaha cr 2020
    • Replies: 27
    • Forum: Yamaha
  4. Ricktptman

    Seeking recommendation for a trusted tech in the SE U.S. for an SX-1980 recap

    I keep trying to screw up the courage to do it myself, but the more I read the more I think experience with this particular receiver is a real (and intangible) plus. Especially with the physical fitment and substitution issues. I see that cap kit on ePrey, but I'm not sure that's the way to go...
  5. J

    Resistor Fail Modes in Vintage Receiver (Marantz)

    Hi All, Do you know what might be the most probable failure mode for a resistor within a vintage receiver? The context: I recently opened up my Marantz 2220B for a cleaning and I realized a resistor within the power supply assembly board (R805; 330 ohms, 2W, 5%) looked very discolored with dark...
    • jorgealk
    • Thread
    • capacitors marantz recap and restoration resistor burned resistors restoration help
    • Replies: 19
    • Forum: DIY
  6. C

    Hitachi SR 803 background noise

    Hello, I've just purchased a hitachi sr 803 receiver and today I’ve went and did some sound comparison between this and the other amplifiers that I have. The first thing that I've noticed was the background noise coming from it. What I’ve noticed: - it's not affected by the volume - it is...
  7. I

    Doing a Cap Job on a Pioneer CT-F2121, Any Transistors to Look Out For?

    Like the title says, I am going to be ordering a mess of caps and/or transistors for a Pioneer CT-F2121 Cassette Deck that I'm trying to get back into fighting shape. I am in the process of making a list of parts to order and replace. Here is a list of the transistors used in this unit...
  8. Mrcoolest123

    Pioneer sx 3600 eletronics replacements.

    Good day everyone! This is my second time asking for guidance on the forum, and I hope you all can help me to some degree. My pioneer sx 3600 receiver is having problems. The phono left channel is dead, and my mono switch is broken. I suppose the problem lies on some capacitor or resistor...
    • Mrcoolest123
    • Thread
    • pioneeer pioneer sx 3600 recap recap and restoration receiover question sx 3600 vintage pioneer
    • Replies: 4
    • Forum: Tape
  9. F

    Marantz 2015 Recapping Questions

    This is my first post so please be brutal! I have a Marantz 2015 and I am almost positive it needs to be recapped. I set it up next to my Pioneer sx-750 that has been recapped and it just doesn't sound as good. So here are my questions (I've looked at the rest of the forum answers and could...
  10. I

    Anti Static Wrist Straps During Winter?

    So I moved to the North East and have discovered that winter brings dry air and a great potential for static electricity buildup. These days I feel like I shock every metal surface I first come into contact with. I'd like to start another recap & transistor project but I'm wary to do so in fear...
  11. Super Noob

    Project: Kenwood KA-3500 (Nate Dogg)

    Well - here goes another rebuild thread. In the last month or so, I succumbed to pressure applied from that other person living in my house. I listed a few of my pieces for sale locally on my wifey's face space marketplace. Needless to say, we didn't get much interest in the pieces listed...
  12. OskarBas1

    Need help with Harman/kardon 330B recap/rebuild

    Ok so I'm going to do a recap/rebuild of my Harman Kardon 330B. I'm not that familiar with doing things like this so I'll need som help. I'm think I'm gonna order the full parts list that dlucy provided in the thread linked below...
    • OskarBas1
    • Thread
    • 330b harman kardon 330b noob first system noob in need of help recap and restoration
    • Replies: 19
    • Forum: Solid State
  13. KFCrosby

    ADS L810 Re-Cap or Replace X-Over

    I think it is time to either replace the crossovers or re-cap them. It's seems easier to me to just replace those aging components. I found these on PrtsExp -...
    • KFCrosby
    • Thread
    • ads 810 crossovers recap and restoration
    • Replies: 11
    • Forum: Speakers
  14. PTL-Pioneer

    Denon PRA-1100 & POA-2200

    Hi all Bought first bits of denon there recently, power amp needs work because speaker terminals all smashed up, the plastic is super brittle. Seems like really nice build quality other than those terminals obviously. Ill post more on that when i take a look at it properly. The preamp needed a...
    • PTL-Pioneer
    • Thread
    • distorted help magic smoke recap and restoration transistors
    • Replies: 24
    • Forum: Solid State
  15. Super Noob

    Project: Onkyo TX-8500 (mkI)

    In my quest to NOT buy anymore 70s receivers / amplifiers.... I have relapsed again. My focus is limited = great value, typical larger WPC, not working. Have read a lot about the TX-8500 mkII Onkyo and wished to find one. A TX-8500 mkI popped up locally in non-working state = it must be fate...
    • Super Noob
    • Thread
    • onkyo onkyo tx-8500 onkyo tx8500 mki rebuild recap recap and restoration tx-8500 tx8500
    • Replies: 35
    • Forum: Solid State
  16. M

    Need help to recap au555

    Hi guys: I need some help in order to choose a kit ro recap a Sansui au-555 Or much better, a list with suggested replecement/ upgrades (if available) in Stores as Digikey or mouser. I found a recap list for model au555 , but probably must be some changes. Manu advise or info ? Regards and...
  17. S

    Re-capped/re-transistored SA-9500; NO SOUND, HELP!!

    Hey guys, I re-capped and changed all the transistors on a SA-9500 and I am getting no sound output. The relay is clicking, but there is no sound on either phono inputs and aux inputs. I have changed the seperated/normal switch, too. The bias has been set, the 20mv dialed in fairly easily...
    • SMD88
    • Thread
    • no audio recap and restoration sa9500
    • Replies: 14
    • Forum: Pioneer Audio
  18. dlucy

    dlucy's Kenwood KR-5030 stereo receiver recap and restore

    A good friend has lost his mind and decided to try his hand at restoring vintage stereos... and this is what I showed him what to do... to recap and restore the Kenwood KR-5030 stereo receiver he found, for cheap, at the local used record store. And his pictures after he cleaned it up and...
  19. K

    SA-8100 Output transistor insulators

    I'm in the final stages of restoring my SA-8100 amp, having replaced the caps, transistors, and a few fried resistors. It is obvious that something really bad happened to the power amp board, so I'm replacing the output transistors as well, assuming they suffered stress along the way. When...
    • kpmadden
    • Thread
    • output devices power amp board recap and restoration sa-8100 sa8100
    • Replies: 3
    • Forum: Pioneer Audio
  20. Zeus12

    KENWOOD KA-4004 Recap & Restore

    Greetings Audiophiles,:) Got this VINTAGE GEM and I would like to do a complete recap and restoration on it. It was 100% original and working great when I got it, with the usual scratchiness of the dirty pots. The only thing I noticed, was ONCE IN A BLUE MOON, the left channel would have...
  21. RussTShackle

    Restoration Experts in Dallas/Ft. Worth?

    I'm looking to have a 2245 refurbed, and would prefer not to pay enormous costs for shipping. Can anyone recommend a Dallas/Ft. Worth area expert? Would prefer if it could be validated by someone who has used them, but I'll take what I can get.
  22. D

    Diagnosing Nakamichi PA-7 Amplifier - Recap?

    I picked up a couple of Nak PA-7 STASIS amplifiers a while back along with a CA-5 and a CA-5II preamp. I put them in my main system one-at-a-time to see what each component would do to the sound. Well, the good news is that the first PA-7 does make sound. Although, I was initially impressed...
    • Decibel_116
    • Thread
    • amplifier nakamiachi nelson pass recap and restoration stasis
    • Replies: 5
    • Forum: DIY
  23. angelaudio

    EL-84 Push Pull console yank, which caps will contribute most to sound quality?

    Hey everybody hope you’re all having a good week. I yanked this nice integrated amp from a console and I would like to know which caps will contribute most to sound quality before I have it serviced. Any help/tips/suggestions are appreciated. Thanks in advance :)
  24. yoho

    Dahlquist m905 Vifa 6 ohm tweeter replacement

    I have a pair of Dahlquist m905s and I’m going to replace the Vifa 6 ohm tweeters. These tweeters are no longer made and Regnar sells them for about $100 for one and they should be replaced as a pair. The Vifa are nice from Denmark but there has to be a more inexpensive comparable tweeter...
    • yoho
    • Thread
    • dahlquist dqm-905 recap and restoration recap list vifa tweeter
    • Replies: 8
    • Forum: Speakers
  25. Y

    Kenwood KR8050 Recap Project - Help with Strange Findings...

    Recently purchased a working KR8050 and decided to recap following the great post of Super Noob (https://audiokarma.org/forums/index.php?threads/project-kenwood-kr-8050.882572/). Unit is in generally good condition, with no evidence of prior work on PCB's or anywhere else . However; on the...
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