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heat sink

  1. A

    Thermal Pad Recommendations

    Greetings. I am refurbishing an old Adcom GFA-535II amplifier. I am replacing the power supply board with a Hoppe's Brain kit and am now working on the two main boards which each have several transistors that are screwed into heat sinks. I already disconnected to get the boards out and now...
  2. FireGuruMN

    Pioneer SX-1980 Exterior Restoration

    A while back I finally bit the bullet and bought a Pioneer SX-1980 off ePray for too much money. It was sold as not working--for parts but "powers on". Which was fine with me. It showed up a bit later in far worse shape than the epray pictures. It was packed in a box the same size as the...
  3. T

    6060 running hot

    It's been a long journey with this 6060, mostly centered around the 2647 Driver board. After replacing the 2SA726 Transistors and a recap of that board, I get clear sound on all inputs from both channels and the bias on both sides adjusts to in spec per the service manual. I'm not sure if the...
  4. P

    Mounting new transistors with heat sink on the SX-737 Main Amp

    I have the power amp AWH-033 in front of me and want to change all the transistors Q1 until Q10. The 4 Output Q11 – Q14 shall stay at this stage. I use the BOM list for the SX-737 and everything was fine until I came to the Q7 - Q10. Original installed are 2sd357 and 2sb527 and I have ordered...
    • pa_200
    • Thread
    • awh-033 heat sink sa1220 sc260 sx-737
    • Replies: 17
    • Forum: Pioneer Audio
  5. gregmcm

    SX980 Stereo Decoder Chip Advice

    Need to replace the PA1001A Stereo Decoder chip in an SX980. As far as availability is concerned I have found a PA1001A on ebay from China and wonder if anyone has any experience with using this chip in place of the original. Here is the ebay link to the chip I could get...
  6. 3

    YAMAHA C80 & C85 PREAMP HEAT SINKS

    I have noticed the heat sinks in the C80 & C85 preamps have a threaded hole for a machine screw. My C80 & C85 do not have the screws that secure the sinks to the PC board & they do move a little although the solder connection is fine. I purchased them used so is this normal or has someone...
  7. R

    Reseating power transistors on SX-950

    I will soon be recapping(+transistors) the power amp on my SX-950. Since it looks like dismounting the heat sink will be required to access the back of this board, per advice found on this forum, I figured that this is an opportune time to remount the power transistors to the heat sink. I am...
    • rkgren1
    • Thread
    • compound heat sink heat transfer sx-950 transistors
    • Replies: 15
    • Forum: Pioneer Audio
  8. Ronito6

    Silly tech noob Q

    Mica insulators of the size and type I need are getting hard to find. So I bought some of these http://www.jaycar.com.au/Electromechanical-Components/Heatsinks-&-Accessories/Thermal-Compounds-&-Adhesives/TO-3-Silicon-Rubber-Transistor-Insulator---Pk-20/p/HP1150 I know they are supposed to be...
    • Ronito6
    • Thread
    • heat sink insulators mica silicone grease transistor
    • Replies: 4
    • Forum: DIY
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