1. Time for some upgrades in server hardware and software to enhance security and take AK to the next level. Please contribute what you can to sales@audiokarma.org at PayPal.com - Thanks from the AK Team
    Dismiss Notice

KR-8010 - 2nd Take

Discussion in 'Kenwood-Trio/Kensonic-Accuphase' started by Super Noob, Nov 18, 2018.

  1. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Was so impressed with my KR-8010 that I am going to do another. Will likely be sold on Barter Town once it is completed.

    [​IMG]

    Will update the post in the upcoming weeks.

    HopJohn... Kenwood Guru = what is your opinion of this model. It is a beast.
     

     

    Please register to disable this ad.

  2. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Unit Arrive Updates to Follow.

    [​IMG]

    [​IMG]
     
  3. BigElCat

    BigElCat Mmm Hmm Subscriber

    Messages:
    7,894
    Location:
    South of Kansas City
    I had one of those...luv'd it.

    Mine had the factory side handles.

    Massive.
     
    Super Noob likes this.
  4. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Power Switch - Contacts Switched To Unused Side and TRAIC Modification Complete.

    Prior To Disassembly
    [​IMG]

    In Process
    [​IMG]
    Finished - Works Flawlessly
    [​IMG]
     
  5. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Power Supply:
    Before
    [​IMG]
    After:
    [​IMG]
    Replaced Caps & Relay:
    [​IMG]
     
  6. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    AMP Boards:

    Before:
    [​IMG]
    [​IMG]

    After:
    [​IMG]
    [​IMG]

    Parts:
    [​IMG]
    Trim Resistors (Bais) Replaced with Bourns 25 Turn Sealed VRs.
     

     

    Please register to disable this ad.

  7. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Outputs:
    [​IMG]
    [​IMG]
    [​IMG]

    Outputs Pulled, Cleaned, Re-Pasted with Wakefield Thermal Paste.
     
  8. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    PreAmp Board:
    Before
    [​IMG]
    After:
    [​IMG]
    [​IMG]
     
  9. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Front End Boards / Tone Controls:
    Before
    [​IMG]
    [​IMG]
    After:
    [​IMG]
    [​IMG]

    Also DeOxit All The Controls / Contacts.
     
  10. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Tuner Board:
    Before
    [​IMG]
    [​IMG]
    [​IMG]
    After:
    [​IMG]
    [​IMG]
    [​IMG]
    Parts:
    [​IMG]

    Spent 2 hours cleaning the old flux off the circuit side with 90% Alcohol.
     
    rickl likes this.
  11. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Filter Caps:
    Upsized the caps from 18000uF to 22000uF 105 C, 80V Snap In Chemicon. The solder tab direct replacement is not available, so I elected to remove the tabs, install them on new caps, stuffed them in the old cap cans, and reinstalled using the original bracket. Turned out sweet.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    Install with 2.2 uF Stacked Film
    [​IMG]
     

     

    Please register to disable this ad.

  12. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Adjustment:
    The left channel offset was roughly 40 mV.
    The right channel offset was less than 5mV.

    40mV is okay... but not up to my expectations. I elected to pull out the 1st different pair:
    [​IMG]
    [​IMG]
    [​IMG]

    Replaced A921s replaced with A992s perfectly matched.
    [​IMG]

    Offset Improved:
    Right
    [​IMG]
    Left:
    [​IMG]

    Bias Dialed Up To 50mV:
    [​IMG]
    [​IMG]
     
    rickl likes this.
  13. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
  14. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Here are finished pics:
    [​IMG]
    [​IMG]
    [​IMG]

    The case shell paint was dull. Hit it with hammer black finish. Turned out really good.

    Used all 105 C high quality Nichicon Caps (mostly KA series) and WIMA films.

    106 New Caps
    2 New VR Sealed Trim Resistors
    2 Gain Match SA992 Transistors
    New Relay
    9 New LEDs

    [​IMG]

    Here is a list = hope it helps out someone in the future.

    https://drive.google.com/file/d/1vR64nceIHzzPqHsHg76uJI3KkVbQqB_-/view?usp=drive_open

    Sounds as expected clear and strong. Will run in for a few weeks and list on barter town.
     
    Last edited: Dec 2, 2018
    gort69 likes this.
  15. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    I was so impressed with my 1st one... that I wanted to do another.
     

Share This Page