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pioneer sx780

  1. ajcoates

    SX-780 - help!

    Hey all! I just finished a full recap of my SX-780, including an upgrade to the discrete output packs that @rcs16 came up with. I also replaced the three heatsinked power supply transistors to modern lower-heat equivalents. It sounded great and tested perfectly last night, but this morning, the...
    • ajcoates
    • Thread
    • buzz through both speakers help pioneer pioneer buzzing sound pioneer sx 780 pioneer sx780 stk 0050 sx 780
    • Replies: 4
    • Forum: Pioneer Audio
  2. C

    Pioneer SX780 am fm tuning meter repair or replace

    The 780 works great, fm stereo good and sound balanced the little red led comes on fine but the tuning meter stays right in the center even while tuning in stations, no wiggle, zero needle fluctuations, zip. The watt meters are fully functional. So is time for a used replacement tuning meter or...
  3. H

    Watt nonsense!

    TL;DR - Is stated power output highly overvalued? I don't suppose I'm the first person to comment on this, but as someone still in the honeymoon period of vintage audiophilia, I'd be interested to hear some community wisdom on the question of power output. Or more specifically, its...
  4. Carlkits

    Pioneer Sx780 not working AC power problems.

    Hello my friends. My pioneer Sx780 doesn't work in my apartment. I found the receiver in mint condition, not been put in work for the last 30 years. I take it to a repair shop and comes home with the relay clicking. I tested for hours in my office, in the repair shop and even on the...
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