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  1. M

    SX-1250 Tuner board.. oops

    Hi everyone, I revived my very sick SX-1250 using the rebuild kit sold by Peace Love and Music. This is a kit for ALL electrolytic caps, and quite a few transistors and diodes. Good news... The Amp is fine. Both channels sound equal and clear. The phono board is fine...
  2. potch

    Yamaha CR-640 Component Identification

    Hello, picked this unit up today and pulled the cover off to have a look. There are 2 square tubes protruding up from the board. One is loose and the 2nd one is not. They both seem to have corrosion around them. The loose one is circled in red in the attached picture. What is the function of...
    • potch
    • Thread
    • board components cr-640 yamaha
    • Replies: 6
    • Forum: Yamaha
  3. R

    Newby Question - those wrapped wires - how to remove?

    I'm learning as I go with a 6160 receiver and want to test parts on the pre-amp board (I've got one weak channel and hissing). This board sits vertically and has long pins/leads off the board which go to the underside. The wires attached to each of these pins looks like it is just tightly...
  4. richardg0n

    Marantz 2325 Protection relay HOT WIRED?

    I bought a 2325 on eBay that has been serviced by a technician including a handful of times by my local repair guy who specializes in 70 stereos. Over the last year, the protection relay was replaced by my technician. The 2325 protection relay keeps clicking multiple times just after turning on...
  5. P

    Restoring and Cleaning Amplifier Internals

    I've come across a Pioneer SA-510 that was kept in the garage as an amplifier. It started "acting weird" so it was given to me. I respect the vintage tech, and want to bring this thing back to life for normal use in a cared for environment. It's got 2 problems. It is oxidized inside. Rusted on...
    • pkalder
    • Thread
    • alcohol amp amplifier board circuit boards cleaning oxidation pcb restore vintage
    • Replies: 33
    • Forum: DIY
  6. Johnny_Law

    Harman Kardon 230A FM Board Curiosities

    So I decided to save this 230A. It got a complete re-cap (pending a larger main power supply cap, ordered the wrong size) and new bulbs and a bath. It sounds (mostly) fantastic. I'll post some pictures of the rebuild below. However, this wouldn't be as much fun without some mystery...
    • Johnny_Law
    • Thread
    • 230a board circuit fm meter harman kardon
    • Replies: 26
    • Forum: Solid State
  7. K

    Dynaco 6v6 Ultra Linear Tube Amplifier PCB Questions

    Hello, Another post seeking help wiring a nondescript Dynaco tube board from Ebay. This one is a Dynaco 6v6 ultra linear circuit. I have the power supply issue under control, but I'm looking for advice on how to properly wire the output transformers to the board. I've read that the OPT for...
    • KCharlemagne
    • Thread
    • 6v6 amplifier board diy dynaco tube ultralinear
    • Replies: 4
    • Forum: DIY
  8. Richs_Trains

    Marantz 4300... no right channel, literally

    Hey Guys, Picked up a Marantz 4300 and the volume control did not work and it only had the left channel. Found the 'local/remote' switch in remote, so that brought the volume, but upon closer inspection, the right channel plug in amp board is missing. Is there any souce for one of these, or...
  9. renzostudent

    Help me I buy Sansui au 999

    Hellou. Please Help me. I buy sansui au999 last week to USD220, in my country buy at that price is cheap. The sound is amazing, the best amp I've ever had BUT Inside it is in good condition but what I worry was that the boards are not the original , they were replaced by others. My question is...
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