PhilInAudio's Recent Activity

  1. PhilInAudio liked catrafter's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    I think you may need to use a bias transistor with a higher Vbe. Tom

    Sep 22, 2017 at 6:12 PM
  2. PhilInAudio replied to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Tom thanks for the idea. I did buy the OnSemi MJE243G for H760, but haven't installed it yet given the notes on my BOM. Perhaps I...

    Sep 22, 2017 at 6:12 PM
  3. PhilInAudio attached a file to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Here is some data that some of you may find helpful, especially when trouble shooting a board. Below is the voltage-across-resistors...

    Marantz 2270_PowerAmpBoard_VoltageAtResistors_Pt1_091017_01.jpg Marantz 2270_PowerAmpBoard_VoltageAtResistors_Pt2_091017_01.jpg Sep 19, 2017 at 4:00 PM
  4. PhilInAudio liked quadtech's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Regarding "6", I ran into something like that - I had to change H754/H755 (2SC735) and H766/H767 (2SA562) and H758 (2SC680) and H759...

    Sep 18, 2017 at 9:57 PM
  5. PhilInAudio liked quadtech's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Awesome work, Phil. Some folks have replaced the original open trimpots with Bourns trimpots...see here - post #65 has the Digikey...

    Sep 18, 2017 at 9:56 PM
  6. PhilInAudio liked Steven Tate's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Excellent work and great info with the BOM. Thanks for posting!:thumbsup:

    Sep 18, 2017 at 9:56 PM
  7. PhilInAudio replied to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Steven Tate...thanks for the kind thoughts! Quadtech: 1) Thanks for the Bourns trim pot idea. I wasn't crazy about the original...

    Sep 18, 2017 at 9:56 PM
  8. PhilInAudio attached a file to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Thanks for the thoughts Steven Tate! OK...everyone...here is the update on my 2270 Power Amp Boards (P750) rebuild project: 1) The...

    DSC_0009.JPG DSC_0224.JPG Sep 18, 2017 at 9:31 AM
  9. PhilInAudio replied to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Cemerson...I just checked this thread for a quick second. I'll be happy to post the spreadsheet tomorrow morning along with a progress...

    Sep 18, 2017 at 2:10 AM
  10. PhilInAudio liked cemerson's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Phil, Great work! Would there be anyway to get this in the original Excel Spreadsheet, if it wouldn't be too much to ask? Thanks, Chris

    Sep 18, 2017 at 2:05 AM
  11. PhilInAudio liked Steven Tate's post in the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Love the connector mods. If it's good enough for later models (2275, 2325, etc.)., it should be good enough for the trusty 2270. I'm...

    Sep 18, 2017 at 1:58 AM
  12. PhilInAudio replied to the thread Marantz 2270 Power Amplifier Board Parts BOM.

    Hello everyone...here is an update: Little more than an hour ago, I finished replacing the all caps, transistors and diodes in the left...

    Sep 16, 2017