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restoration

  1. A

    Version 3 Fisher 400 (S/N 80262) — Selenium Rectifier Replacement & Dropping Resistor Value?

    Hi all, Long-time lurker, first-time poster. I recently found a Fisher 400 on the street and I want to start the process of restoring it. Serial number is 80262, which I understand puts me in the 48001-and-up (version 3) camp. I'm getting ready to replace the selenium rectifier with a W04G...
    • Audio fan1
    • Thread
    • fisher 400 rectifier replacement restoration selenium rectifier tube receiver
    • Replies: 4
    • Forum: Fisher
  2. richiem46

    I just received a nice Sansui AU-719 for restoration

    I have previously restored a Sansui AU-717 and a AU-919 and both went well. I must really enjoy removing the notorious Sansui glue because I just purchased an AU-719 from a gentleman in Canada. It looks clean and appears to be all original. It powered up normally and came out of protection. I...
  3. L

    Infinity Quantum 2 -#1 Best way to access crossover and free frozen Tweeter X-Over switches. # 2 I have a broken binding post., best way to access.

    Hello everyone, I'm new to the forum I recently aquired a pair of original working Infinity Quantum 2 speakers. As far as I know, they have never had any crossover work done. Both of the Tweeter X-Over Frequency swithces are completely frozen in the HIGH position. I do not want to force them...
  4. PattonD

    Pioneer SX-1500T Faceplate Lettering Restoration: Beginner Seeking Guidance

    I’m still a beginner at electronics repair and this estate-find Pioneer SX-1500T is the oldest unit I’ve worked on. I’ve ordered a recap kit and an LED bulb kit, and with the faceplate off for the bulb install, I want to restore the missing lettering around the Power/Speakers knob and bottom...
    • PattonD
    • Thread
    • decals diy faceplate pioneer restoration sx-1500t
    • Replies: 2
    • Forum: DIY
  5. njappboy

    Vintage Parts Vendors 2026

    It would seem that we have lost some key vintage and substitution parts vendors due to various reasons and I was thinking it might be time for an updated list: - kpcomponents (Canada) - webspareparts (Portugal) - mouser (USA) - digiKey (USA) - jotrin (Hong Kong and Mainland Taiwan) - Moyer...
    • njappboy
    • Thread
    • parts repair parts restoration substitutes
    • Replies: 15
    • Forum: Solid State
  6. G

    Need help with Admiral Chassis 20A6 (PWS-E6183AS) — SAMS 938-3 Parts Info

    Hi everyone! I’m currently restoring a vintage Admiral PWS-E6183AS with Chassis 20A6. I’m doing a full high-end recap using Nichicon KZ and Elna Silmic II. I’ve hit a bit of a road block with the small "brick-style" capacitors. Specifically, I have 75pF and 10pF caps that have an underline in...
    • greensour
    • Thread
    • 20a6 admiral pws-e6183as restoration sams 938-3 schematic silver mica
    • Replies: 1
    • Forum: Solid State
  7. C

    SA-8100 low volume left channel and parts list Update

    Hi, last year I started restoring the old SA-8100 which belonged to my mother. I changed all the e-caps (including the ltwo large ones 10 mF 50V, half of the diodes, half of the transistors and the relay. The unit works quite well and the improvement has been noticeable, but there are still some...
    • centrons95@h
    • Thread
    • led conversion left channel gone parts list restoration sa-8100
    • Replies: 9
    • Forum: Pioneer Audio
  8. R

    M-90a power protect problem

    I have an M-90a imported from Japan that looks like it's spent time in a river with how corroded it is, I got it for cheap so it is what it is, but I'd like to see if I can't fix it. The unit powers on but immediately enters protection mode. I have a step down transformer I'm using to power it...
    • Rotary
    • Thread
    • pioneer pioneer 100v repair repair advice repair advice help needed repair amplifier repair help restoration restoration help urushi
    • Replies: 2
    • Forum: Pioneer Audio
  9. S

    Sansui AU-717: Restoration with new boards

    Hey all, after having completed a thorough restoration of my Technics SE-9600, now a restoration of my Sansui AU-717 was in order. I got this amp in working condition, although with a DC offset of ~50mV, a slightly dirty speaker switch and - only detectable with test equipment - a slightly...
  10. R

    Pioneer PL-70LII Damaged in shipping

    Any advice on how to fix this damage or am I just screwed? I've got photos from before it was shipped and it was mint. I'm genuinely gutted. I imagine it's a veneer, but I also imagine finding a replacement veneer would be borderline impossible. Not to mention the fact I'd probably need to use...
    • Rotary
    • Thread
    • damaged pioneer pioneer pl-70lii pioneer pl70lii repair advice repair advice help needed restoration restoration help
    • Replies: 72
    • Forum: Turntables
  11. R

    Champagne Face Plate Restoration

    I've got a couple CT-970s showing up from overseas next week, basically the CT-9R but without the complexity of the reverse function. However the CT-970s I picked up are in pretty rough shape with some surface corrosion on the body and tons of grime on the faceplate. I've got no idea what...
    • Rotary
    • Thread
    • champagne clean cleaning cleaning advice pioneer pioneer champagne pioneer communication pioneer ct-970 restoration restoration help
    • Replies: 18
    • Forum: Pioneer Audio
  12. M

    Pioneer SX-800 Resistor replacement - composite vs carbon opinion

    Hi all, I'm refurbishing a Pioneer SX-800 tube receiver. I've done this for several receivers, but this unit seems to have a sizeable number of "composition" resistors. I'm assuming this is a carbon-composition instead of the plain carbon film resistor. (Correct me if wrong) I've read that...
    • MossFit
    • Thread
    • pioneer resistors restoration sx-800
    • Replies: 5
    • Forum: Tube Audio
  13. N. Jerboa

    Cambridge Soundworks M80 restoration

    I picked up a pair of these M80s recently and they are in need of some work. The dustcaps on both midrange drivers have almost completely dissolved. I'm a little concerned about how much of that material ended up inside the drivers, but they seem to sound ok. One of the tweeters is putting...
    • N. Jerboa
    • Thread
    • cambridge soundworks restoration speaker repair
    • Replies: 0
    • Forum: Speakers
  14. richiem46

    Beginning my Sansui AU-919 restoration

    I restored a Sansui AU-717 last year for another AK'r and was very impressed with the sound quality of the finished unit. I documented this restoration in the thread below: https://audiokarma.org/forums/index.php?threads/sansui-au-717-restoration-experience.1080560/ In April of last year I...
  15. S

    Technics SE-9600 - restoration with new PCBs

    Hey all, I recently concluded my restoration project of a Technics SE-9600 - part 1 anyway. I got this amp (and the SU-9600/ST-9600) a couple of month back. I enjoyed the design and built-quality of the amplifier and everything seemed to be original including original outputs. A couple of...
  16. L

    Pioneer SA 7500 II restoration help

    Hey this is my first post here and my first restoration project as well. I'm hoping to get a little insight on this SA 7500 II I picked up the other day. This thing was on marketplace for $80 and I couldn't pass it up. I am a huge fan of the old 70s pioneer sound, my dad had one when I was...
    • laike
    • Thread
    • pioneer restoration sa-7500 ii
    • Replies: 35
    • Forum: Pioneer Audio
  17. Leestereo

    Leestereo Mods, Tweaks and Tips for the Sansui 771

    Part 1: Random "Popping" Noise This 771 exhibited random "popping" noise in both channels; measurement of the DC offset at the speaker outputs, demonstrated that the reading would fluctuate widely, reaching at times, several hundred mVs. This behavior was independent of input source and was...
    • Leestereo
    • Thread
    • hiss hum modifications noise restoration sansui 771 tweaks upgrade
    • Replies: 93
    • Forum: Exclusively Sansui
  18. kennycrippen

    NAD 214 Troubleshooting

    I’ve been restoring a NAD 214 power amp with my 9 yo son for a fun learning project. He’s been doing great with soldering and staying interested. Initial symptoms were: unit powers on, soft clipping light stays on, no relay click. Front lights stayed on even after unplugging the unit suggesting...
    • kennycrippen
    • Thread
    • nad nad 214 power amp power supply power supply board relay restoration restoration help
    • Replies: 31
    • Forum: Solid State
  19. ADClosson

    Bringing a flood-damaged ST-70 back to life

    Hi all. I've got a previously restored ST-70 that I want to resurrect after a flood a few years back. As you can see, the output transformers and power transformer have some surface rust. The interior, to my eye, looks remarkably well preserved. My question: what are essentials steps to take...
  20. wmac

    Luxman L-560

    Hi, I am restoring a Luxman L560, and I need to find a power switch. Please get in touch with me if you know where to find it. Also, I need to find a service manual
  21. M

    Nivico 471E-5 Restoration in 2025

    Hi all! I have a NIVICO (JVC) 471E-5 that I pulled out of a storage closet in The Rainbow Bar and Grill on the Sunset strip in Hollywood in around 1990 (Along with a pair of Boston Acoustic A70 speakers.) Thinning out stored posessions in my old age...and decided to get the table and the A70's...
  22. 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
  23. JIBBLES

    Onkyo TX2500 Restoration Advice/Feedback

    Hi all. I could use some advice on my latest project. I've acquired (as the 2nd owner) a really well kept Onkyo TX2500 receiver. My list of upgrades/modifications might be lengthy (as there are subjectively 'better' receivers out there), but I'd really like to refresh this unit and have it be a...
    • JIBBLES
    • Thread
    • onkyo recap restoration vintage
    • Replies: 2
    • Forum: Solid State
  24. LordLunatic

    Restoration of JBL l46 - should I recap?

    I found these near mint condition L46 at a local thrift store - didn't know what they were, just saw big JBL's, beautiful walnut finish and thought it was too good to leave (my dad has always been a JBL fan) I just replaced the rubber surrounds on, and that was quite the undertaking compared to...
  25. MartinAudio

    Sony TAN-5550 Restoration Thread

    Some time ago, a friend of mine inquired about purchasing a VFET amplifier, and was veering towards a Sony TA-N7b. However due to both their expense and rarity, he decided to go with the more common and easily servicable TAN-5550 model. I've worked on a few of these at this point and know the...
    • MartinAudio
    • Thread
    • 5550 death diode rebuild recap restoration servicing sony tan-5550 vfet
    • Replies: 37
    • Forum: Solid State
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