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power supply caps

  1. A

    Need Help Identifying a Replacement Cap for L-05M Power Supply

    Hi, Hope your listening is going well. I am in the process of acquiring a pair of L-05Ms. Been "in storage" for years according to the seller. Most likely be in need of a rebuild. I've looked through the AK database for information on the main filter caps (12,000uF @ 79V). Did not see...
  2. G

    Leak Delta 70 – DC Offset Spike on Start-Up

    Hello all, Looking for a bit of advice on my Leak Delta 70. On power-up, I’m getting a noticeable thump through the speakers and a spike in DC offset. I’ve measured the offset across the speaker terminals with a multimeter. It jumps to around +16V when I switch on, then slowly drops over 30–40...
    • Gorsko
    • Thread
    • capacitor replacement dc offset spike diy repair help leak delta 70 power supply caps power surge on startup speaker thump vintage british amplifier
    • Replies: 1
    • Forum: General Audio Discussion
  3. Yamaha5000

    Yamaha CA-1000/CA1000II Power Supply and Protection Circuit Diagnostics, & Lower SNR values with the QA403

    With the DVM + lead on the Base of TR708 and the - lead on E: On the V scale I read 15.32vdc and the relay is off On the mv scale the relay coil becomes active I can use the V and mv scale selector to act like a switch to turn the relay on and off. FYI the Emitter to E measures 15.84vdc...
    • Yamaha5000
    • Thread
    • 60 cycle hum crosstalk internal hookup wire power supply power supply caps protection circuit qa403 snr yahama amplifier yamaha ca-1000
    • Replies: 358
    • Forum: Yamaha
  4. M

    Power Supply Caps

    Hoping to replace the 13,000 uf supply caps in my 2275 this past weekend but quickly realized I may not have enough heat in my soldering iron (60W) to deal with the jumper bar that spans the two caps. Anyone have suggestions on best way to remove/re-install the bar and wires? What iron would...
  5. jefferylhenr

    Luxman R-3055 Receiver Before first turn-on?

    I just picked up a mint Luxman R-3055 receiver. Bought originally by an older gentleman and gifted to his son who never used it or even turned it on; in original plastic, foam and box. It hasn't been turned on for at least 5 years. It looks like its brand new... Question is, should I replace...
  6. jefferylhenr

    SONAMP 2120T MKII Power Supply filter capacitors

    I have a SONAMP 2120T and am considering the potential benefits of upgrading the power supply filter capacitors and potentially others that might make sense. I believe its from 2008 or 2009. I am using it to drive the bass woofers in a set of 4ohm bi-amped three way speakers. Does anyone have...
  7. spaghetti

    Yamaha B-2 power amp - possible main caps issue?

    I recently purchased this great amp on the famous auction site, I spent a few days disassembling it and cleaning each and every part, putting everything back together, and finally today I decided to test it... with VFETs safely removed, of course :D Voltages are quite fine, +85V is slightly...
    • spaghetti
    • Thread
    • power supply caps yamaha b-2
    • Replies: 5
    • Forum: Yamaha
  8. tusntuk2

    Kenwood KR-5600 about replacing 7500uf-50v filter caps?

    About to do a full recap of a Kenny KR-5600, but I wonder if I can bump up the main filter caps a bit? The original 7500uf 50v have lots of modern replacements with screw term's or rather high prices, none of which I want. I found some 8200uf 80v snap-ins that would seem to work, but since I'm...
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