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amplifier

  1. D

    Ongoing relay maintenance

    After having recently cleaned both A & B speaker relays, the question I had was - how do I ensure B relays are in good condition over time if speakers are connected to the A terminals. - Switch speakers between A & B terminals to ensure B relays are operational and exercised? - Or if it's not...
  2. H

    4 Transformers in a 2 Channel Amp?

    Does anyone know why a 2 channel amp would have 4 transformers in it rather than just 2 or 1? I'm going to try and attach a screenshot I took from Bedini's webpage that shows the internals of their Dual Mono 100/100. Usually I only ever see 1 or 2 transformers in a 2 Channel amp. I have a...
    • heton03
    • Thread
    • amplifier bedini class a dual mono stereo
    • Replies: 8
    • Forum: Solid State
  3. Oakland Red

    Rotel RMB 1095 help

    I should probably (definitely?) just walk away from it but I’ve got a lead on this amp at a steep discount. The catch? The fronts don’t work and the seller has no clues (that he’ll share). I don’t need 200 wpc running to my HT surrounds, but even if I can’t get it fixed, can I run front...
  4. P

    Need help repairing Yamaha A-560 amplifier

    Recently I picked up a "fully working" Yamaha A-560 amp for cheap and it has one small problem - it isn't fully working (gasp)... Sound coming from the left channel is distorted. What I've found out is that both output transistors of that channel were not even connected to PCB. After checking...
    • PauliusA
    • Thread
    • amplifier distortion problem transistors yamaha
    • Replies: 8
    • Forum: Yamaha
  5. H

    NAD 3020A recap assessment.

    Hi, Have just recapped my owned-from-new NAD 3020A. Sounds good on first outing and have managed to get 0mV DC on the speaker posts. Attaching some photos. Prior to buttoning it up, please could anyone knowledgeable on the recapping of this particular amp let me know if I’ve made any obvious...
    • Hifibythekg
    • Thread
    • amplifier nad nad 3020a nichicon recap solid state wima
    • Replies: 7
    • Forum: Solid State
  6. Z

    Luxman L510 complete restore

    Hi all, I've just finished a really long and complex restore on a Luxman L510, I've bought it used and for repair, unfortunately too many tentatives to repair it before my turn, PCBs where damaged with some repaired connections and too many unsoldering and soldering, some transistors where...
    • zluca71
    • Thread
    • amplifier l510 luxman repair restore
    • Replies: 7
    • Forum: Solid State
  7. 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
  8. Ldsc2002

    Destroyed Technics SU-Z600 faceplate

    Hi, I just bough a mint Technics SU-Z600 that was sadly damaged in shipping. After searching for one of these amplifiers for a long time, I finally found a mint one for a good price and decided to buy it. I know its not exactly a high-end amplifier, but I really wanted one because its the...
  9. M

    Turntable Stand

    Hi all, hopefully the picture has been tagged on correctly. But could I have your thoughts on this and cheaper alternatives or if someone has a better idea for space compromised sideboard.
    • M8och
    • Thread
    • amplifier short of space stand turntable wood
    • Replies: 30
    • Forum: Turntables
  10. marini

    Help troubleshooting problematic Pioneer SA-608 amplifier

    Hi all, So I found this amplifier with a reported issue of "crackling, sometimes muted, left channel" and decided to grab it and see what I could do about the issue. First thing I opened it and noticed it had a few parts in the dust - yes, it was so dirt I could barely make sense of what's what...
  11. marini

    Weird burnt smell on Pioneer SA-608 amplifier

    Hi all, Taking advantage of the loads of free time at hand, I decided to get rid of that annoying crackling noise when operating some of the switches on my amplifier. Nothing new to me, as I've done this many times on all my equipment. But... This time something isn't quite right. I literally...
  12. H

    Yamaha Amplifier

    I want a great Yamaha power amp to run my main system. My speakers are biggish Celestion Ditton 66 floorstanders which apparently like high current, probably in order to grip the 12” bass drivers. My question is: In which descending order of sound quality would people recommend the various...
    • Hifibythekg
    • Thread
    • amplifier power amp yamaha
    • Replies: 90
    • Forum: Yamaha
  13. pinodangio

    Repair my Phase Linear 400 in San Francisco Bay?

    Hello everyone, I bought in June 2019 a Phase Linear 400 on Ebay for $400, described as "Recently Serviced". It worked like a charm for 1 year, but suddenly one day while I was listening, a big sound "bzzzzzz" came out of the left speaker. The speaker was "out" by half of an inch. I...
    • pinodangio
    • Thread
    • amplifier california phase linear repair san francisco solid state
    • Replies: 8
    • Forum: Solid State
  14. K

    Modern integrated for vintage KLH6 Speakers?

    I know it bordering on heresy to discuss such things here, but: My brother scarfed my Panasonic SX 650 decades ago, and recently my Dynaco Stereo 150 (which I built in the 70s) finally croaked. I still have a Nakamichi 410 preamp that's kicking and recently i recapped and refinished a vintage...
    • KeithTr
    • Thread
    • amplifier cyrus one integrated integrated amp nad d3045 quad vena ii sonos
    • Replies: 0
    • Forum: New Gear - Values
  15. PiMaxC

    RE-8420 issues

    My grandfather gave me his old quadraphonic 8 track player and I recently took it to work to power a set of Kenwood 3 way floorstanders I found in an abandoned area of the building. When I hooked everything up it worked but sounded very quiet, then all of a sudden the right channel gets really...
    • PiMaxC
    • Thread
    • 8-track 8track amp amplifier panasonic re-8420 re-cap reciever repair troubleshoot
    • Replies: 11
    • Forum: DIY
  16. Ray122

    Yamaha CR-1020

    Hey everyone! Hope you're all enjoying the holidays! I once again found myself in a repair pickle and asking for the sage wisdom of members much more experienced than myself. Recently re-capped a Yamaha CR-1020 for a friend and first I ran into the issue with the misprinted polarity sign on...
    • Ray122
    • Thread
    • amplifier amplifier repair bias adjustement distorion help repair repair help service help. yamaha yamaha cr1020
    • Replies: 41
    • Forum: Yamaha
  17. C

    Looking for help please on fixing the damage I did to my amp...

    I just got a Pioneer SA-710 amp and after cleaning the pots, it tested perfectly. Unfortunately I didn't notice that the speaker wires were not inserted in the connector as far as they should have been, or the wire was stripped more than it should have been...in any event, the exposed wires...
  18. mrk229

    Quasi-Complementary Amp Question.

    I am helping a member @62vauxhall troubleshoot a Rotel RA-1412. Thread Here: It had two of the four outputs shorted in one channel. There is some concern that the regulated supplies are not working properly. I want to ask him to monitor the regulated voltages while bringing it up with a...
  19. Fasturd

    Lafayette KT-550 stereo tube amp potential purchase.

    First time dollars and sense poster... I have an opportunity to purchase a Lafayette Stereo 550 or KT-550. I think they are the same except the KT is the kit built version. Anyway I am having trouble determining what is a reasonable price to pay? The amp may have had some minor servicing done...
  20. Brian Seeley

    Magnavox 8601-20 Amplifier question

    Hello. My first post. I recently came across an old Magnavox Tube radio. Model OFM-026 that has a smoked amplifier Power Transformer. I sent it in to have it recapped and reconditioned. Model 8601-20 amplifier and my technician tells me the Power transformer is cooked. My question is; does...
  21. Sergimm

    Install connectors to avoid (de)soldering?

    I’m restoring a vintage amplifier, and the current board I want to work on (the tone board) has a lot of cables coming from diverse knobs and switches directly wired to pins on the board. It would be a ton of work to desolder all those pins and then solder them again, and in my experience...
    • Sergimm
    • Thread
    • amplifier cable connector wires
    • Replies: 15
    • Forum: DIY
  22. Owndragon21

    Sony TA-F530ES West Germany model convertion to other version

    Welcome everyone, I have the Sony TA-F530ES West Germany version. Its very good solid amp and i like it. But i have heard that West Germany version has a few changes compared to other versions that makes it sound worse. I heard that it comes to one capacitor and resistor in preamp. I dont...
  23. touche112

    Pioneer SX-525 - No sound at all

    Hey all! I picked up a Pioneer SX-525 in a salvage shop for a measly $5. Got it home today, powered it up, and it glows like the first day out of the box. But I have no sound! So, I replaced the left and right "protection" fuses, found an unwrapped yellow wire that went to one of the large...
  24. S

    Amps for KEF LS50M, balanced, high gain, NOT class D

    Hey everyone, Perhaps I'm looking for the impossible, but... would anyone be able to recommend a separate amp (standalone, not integrated) for the new KEF LS50M? Ideally, it should be: -comfortable going down to 4ohms, but rated for 8ohms (i.e. solid-state, probably) -class A or class A/B; I...
  25. alexhastings

    SA-8800 protection mode help

    Hi! I'm trying to get my SA-8800 working - it's stuck in protection mode and I'm at a loss. I've replaced all the components on the GWH-128 board that are marked with a /!\ on the schematic (been meaning to do that amnyways - when this amp was working it had issues with the L channel cutting...
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