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recap and restoration

  1. I

    Infinity Renaissance 90 ReCap

    Hello, guys! I want to recap my newly (few months ago) acquired Renaissance 90. I actually did it already, but I find out that there are some tiny details like original caps ESR, that are not matching the new caps, which is expected ofc. My goal is to get the original sound when new, but I am...
    • ILX
    • Thread
    • infinity renaissance 90 recap recap and restoration renaissance 90
    • Replies: 3
    • Forum: Infinity Loudspeakers
  2. R

    Question about recap kit for Dahlquist Dq 10

    Hello all. I just picked up an early set of Dahlquist Dq 10s from an estate sale. They were made before the mirror imaged versions and have the blue/gray bi polar caps on the crossover. I hooked them up to a Yamaha amp that I had sitting around that is rated at 95 wpc, and I was blown away! I've...
    • ramey510
    • Thread
    • dahlquist dq 10 recap and restoration
    • Replies: 8
    • Forum: Speakers
  3. seablade

    Rotel RB-980BX power amp - preserve for the future

    This is intended to be a build thread for my project of preserving my Rotel RB-980BX power amplifier for the future. For anyone that wants to follow, I kindly ask for your patience as this project will move slowly and when time allows. I recently bought the Rotel RB-980BX power amplifier...
    • seablade
    • Thread
    • rb-980bx recap and restoration rotel
    • Replies: 0
    • Forum: Solid State
  4. Halfin

    Vintage homemade LS3/5A (CS1A?) 8 Ohm

    I got lucky and bought these LS3/5A homemade speakers from the 70s. The person I bought it from had inherited it from family who ran a HiFi shop in the 70s. As they sold KEF speakers they had access to KEF parts and BBC papers I believe. Though it seems to also have some resemblance to the CS1A...
    • Halfin
    • Thread
    • amp matching bbc ls3/5a ls3/5a recap and restoration speaker advice
    • Replies: 5
    • Forum: Speakers
  5. K

    HARMAN Kardon HK 665 vxi restoration question

    a question : what is normal temperature of this amplifier? It is known that they run warm but I have not found more specific information background: - a few weeks back I got hk 665vxi to my must have vintage collection. Unit I got was working but gave every now and then static noise at random...
    • kotli79
    • Thread
    • 665vxi harman kardon hk-665vxi hk665vxi recap and restoration temperature
    • Replies: 0
    • Forum: Solid State
  6. M

    Rubycon caps replacement in CD

    Hi. I am servicing JVC CD player fully equipped with Rubycon caps CE W type blue and gray bipolar As they are ca 30 years old minimum I am going to replace them by current good quality reasonable caps. CD was faulty (missing oscillator due to corrosive action of glue - fully demolished...
  7. S

    Marantz 2230 Power Supply P800 transistor H2 hot to the touch - normal?

    [Edit: It's the H802 transistor, but I can't edit the title of the thread] Hi, I am in the process of cleaning up and recapping a Marantz 2230 that has been in the family for over 50 years. I had a relamp kit I bought in 2020 still laying around, and decided to go all-in and do a full restore...
    • sschaper
    • Thread
    • 2230 hot marantz p800 recap recap and restoration restoration transistor voltage readings
    • Replies: 3
    • Forum: Marantz Audio
  8. ZeRask

    Yamaha A-1 high voltages

    Hello, AK’ers I hope some Yamaha A-1 experts here can help me troubleshoot a weird voltage issue with my receiver. I attempted a recap/servicing on my A-1, which went well until the Electrolytics board, which was supposed to be the last one. I studied everything related to the subject on AK...
    • ZeRask
    • Thread
    • dc offset idle current recap and restoration voltage yamaha a-1
    • Replies: 65
    • Forum: Yamaha
  9. tlann

    Harman Kardon 230A basic upgrades/restoration

    Hey all — I have a Harman Kardon 230A from the “minimalist” HK era, and it sounds sweet. Very warm but still nicely defined. So I should caveat what I’m about to ask by saying that I already am quite pleased with the amp. But I recently hooked it up to my Klipsch Heresys, and the sound is so...
    • tlann
    • Thread
    • harman kardon harman kardon 230a harman kardon minimalist heresy klipsch recap and restoration
    • Replies: 3
    • Forum: Solid State
  10. Refugee

    Older McIntosh Equipment - Where does the higher THD rating come from?

    I was curious what y 'all's thoughts were as to which components contribute the most to higher THD ratings on older solid state 70's McIntosh equipment vs. modern. It could be capacitors, transistors, resistors, pots and switching, or board layouts. Caps need to be changed out anyway, but does...
    • Refugee
    • Thread
    • distortion recap and restoration refurbish solid state spechs thd vintage 70's
    • Replies: 15
    • Forum: McIntosh Audio
  11. Trodder

    Denon DP-51F Restore Thread and Questions

    It seems a lot of these heavily electronic turntables are really starting to reach a period of issues and failure. If you are lucky you realize a lot of the issues are resolved by simply recapping the turntable BEFORE it causes a chip (microprocessor) failure. Right now I have a Denon DP-51F...
    • Trodder
    • Thread
    • capacitor replacement denon dp-51f denon dp-52f recap and restoration truntable recap turntable adjustment turntable advice turntable capacitor replacement turntable restoration
    • Replies: 2
    • Forum: Turntables
  12. B

    Recapping Advice

    Hi from Buffalo! I‘m pretty new to this group, and to restoring vintage audio equipment, so I apologize if what I’m asking isn’t as clear as it could be. We’re working on a Decca, Silvertone, Emerson, and RCA (all from the early 60s) and I have two questions: 1. I’m looking for a clear...
    • BuffaloJeff
    • Thread
    • console decca recap and restoration tube amp vintage audio
    • Replies: 4
    • Forum: DIY
  13. 3

    Sonicap Capacitor Cost

    Why have Sonicap capacitors gone up in price? I'm not talking double, but about 5x the cost of what they used to be a couple of years ago. Just puzzled by the price increase. Is there any places other thank sonicaft, they can be purchased from?
    • 33and1/3rd
    • Thread
    • capacitor crossover recap and restoration sonicap
    • Replies: 16
    • Forum: Speakers
  14. mosfets

    Nikko Beta II preamp re-cap work

    I bought a circa 1978 Nikko Beta II preamp from the internet. The local seller said he was the original owner(he would have been under 10 years old when it was new). The cord was cut and extended, butcher job. Someone took it apart and put it back together with the facial grommet missing from...
    • mosfets
    • Thread
    • beta ii nikko preamp recap and restoration
    • Replies: 2
    • Forum: Solid State
  15. H

    Marantz 2220B (Later '78?) Restoration Advice/Questions

    Hi all, I picked up a 2220B a few years ago for dirt cheap and have been using it in the garage ever since. I finally got tired of the scratchy/intermittent controls and decided to do a fairly extensive restoration. I believe this one was built in 1978, and so it does not exactly match the...
  16. Wombaton

    Rebuilding a Pioneer SA-710-2 (FL) amp

    This one, to be precise! Trying to get back into the restoration game after a break with my first Pioneer project. Currently in pieces, being cleaned: I got it for almost nothing, as the seller thought it to be broken. But it is actually mostly functional. Both channels play evenly in mono...
  17. AshhBoy_

    Kenwood GE-1100 graphic equalizer repair (recap and analyzer issues)

    I've been using this beautiful unit for a little while now and thought everything was fine, although a bit crunchy when pressing buttons. The Sound has the 'warm' feeling from old caps and the power supply caps for sure need to be replaced, hence that thread. The first owner was my father, unit...
  18. R

    Sansui G-7000 Capacitor and Transistors list

    Does anyone have a parts list for complete recap and transistor upgrade for Sansui G-7000 unit? Service manual weirdly doesn't list all of the electrolytics. Thanks.
  19. N

    Marantz SR 7000 recapping - 2 large caps questen

    Hey guys, Hopefully someone with electronics experience can weigh in. I am a student with an audio hobby, I managed to get some secondhand audio stuff (Mission MX4's, Magnat sub and Marantz SR 7000). I don't have any education relevant for board level repair so I'm basically free winging it...
    • NetNix
    • Thread
    • marantz recap and restoration recap help
    • Replies: 8
    • Forum: DIY
  20. Refugee

    DYNACO ST-120 Restore to former glory

    Dynaco stereo120a Restoration I have had this unit for many years. The last time it was in service was about 15 years ago. As far as I can remember, it was working well. I did not test the unit before I began working because I was worried about causing damage by powering up before some...
    • Refugee
    • Thread
    • capacitor coupled dynaco dynaco 120 dynaco st-120 dynaco st120 parts list recap recap and restoration updatemydynaco
    • Replies: 35
    • Forum: Solid State
  21. Dig22

    Marantz 2220B - To Recap or Not to Recap...

    Hi, The Marantz 2220B is a keeper. Great unit. Working fine at the moment. I've worked on tube amps, but not on circuit boards like in the Marantz. So question is: should I service it? I've looked under the hood and changed the vellum and original lights to LEDs, but if the unit is working...
    • Dig22
    • Thread
    • 1970's circuit boards capacitor kits marantz 220b recap and restoration
    • Replies: 20
    • Forum: Solid State
  22. Essay

    A story of 2 KA-8300 Amps (renovation)

    Hello all, I am the happy owner of 2 KA-8300 amps. Both amps are in working order, but of course, after 45 years, the electrolytics are reaching/past the end of their life and the power supply boards are in dire need of some conservation. The information in this post is both from the forum...
  23. S

    Pioneer SA 9100 (910) Help restoring

    Hi, so i have this pioneer sa 910 (The japanese version), and it needs a full restoration, and i dont know where to start, anyone help is appreciated. When i firts got it, it turn on but the protection light it stays on and the relay does not click, i recap and change all the transistors on the...
    • speks
    • Thread
    • pioneer recap and restoration sa9100
    • Replies: 2
    • Forum: Pioneer Audio
  24. skyegreen424

    The Technics SA-R477 late 80s restoration project

    Hi!! I posted in another thread to gauge interest in logging the recap of a late 80s Technics SA-R477 100wpc unit. Here's the thread because I made a parts list, checked it twice, and ordered it all on Digikey for delivery in about three days. I've got a healthy mix of electrolytic...
  25. Zeus12

    Sansui AU-5500 - Recap and Restore

    Greetings fellow audiophiles,:) I´m so in love with this model that as soon as I saw another on for sale, I JUMPED ON IT!! This one is in much better condition than my previous one. Oh, what a learning journey that one was. Got it fully recapped, changed the problematic transistors and it´s...
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