My 9090DB Story

Discussion in 'Exclusively Sansui' started by joe camilli, Sep 7, 2018.

  1. joe camilli

    joe camilli New Member

    Messages:
    9
    My dad purchased the receiver new back when. He passed away 20 years ago, and the unit has been sitting in my parents’ house until my mom’s passing this March. My brother, who currently owns the house, said I should take the receiver or he was going to trash it. I brought it home with me and started to do some Google searching and found this forum. Which I am glad I did. While I was trying to decide what to do with the unit I reached out to a company in the northwest. After sending a couple of pictures they made a generous offer to buy the unit but the shipped would be a killer from Atlanta. I continued to read this forum. As a side note I am amateur (HAM) radio operator and just so happen I have all the necessary equipment to work on the receiver. So, I decided to re-cap, EC only, the receiver. Also, since a new PCB was available for the F2624 Driver build a new one. I place two orders for the parts the first to cover just the F2624 build and the second for all the other ECs. With the second order when it was received I separated the parts into a series of “mini-kits” I bagged all the ECs for each board. Along the way I also changed out the bulbs for LEDs. All parts were ordered from Mouser, Digikey or Arrow except for the LEDs which were from eBay. As of this posting I am almost finished with the recap work. I have included some pictures. The first two are the as is condition of the unit. The third is a “progress” picture with just a few ECs left to go.
     

    Attached Files:

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  2. kevzep

    kevzep Its all about the Music Subscriber

    I like hearing stories like this, so cool to have your Dad's Sansui. It looks to be in exception cosmetic condition.
    Just a bit of a dusting and good as new.
    I heavily suggest you do the work to the Dolby board by pinning and soldering the pass-throughs, then you will have reliable operation with no channel drop out...
     
  3. rustycat

    rustycat 70s gear freak

    Messages:
    981
    Location:
    High in the Custerdome
    After you restore it you could sell it for big bucks on Craigslist. This unit is highly sought after.
     
  4. kevzep

    kevzep Its all about the Music Subscriber

    Personally I'd hold too much sentimental value to want to sell my father's stereo amp....sometimes its worth much more to hang on to it...
     
  5. joe camilli

    joe camilli New Member

    Messages:
    9
    Yes the Dolby broad has has all the pass-thoughs re-soldered, ribbon cable replaced and wipers cleaned. Also all the surfaces have been cleaned. Cleaning of the whole unit in general consisted of first 409 (spray and wipe), then 99.9% Isopropyl (spray and wipe) and finally "canned" air dried.
     
  6. tnsilver

    tnsilver AK Subscriber Subscriber

    Messages:
    3,517
    Location:
    Boston
    Good for you Joe! Very nice work. I'd hold on to it too in memory of the elders and for posterity, if not for my self.
    Make sure you bias it correctly and adjust DC offset. All the info you want is in this forum, just ask anything if
    you need to know.

    Tom
     

     

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  7. rickb119

    rickb119 AK Subscriber Subscriber

    Messages:
    173
    Fond memories (I hope) and a great receiver!
     
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  8. Jimbo40

    Jimbo40 Member

    Messages:
    98
    Nice project. good for another 25 years.
    I'd never let it go for any money. But I bet you become an addict like me. And you'll need some good vintage speakers to mate it with.
    This is just the beginning, sit back and enjoy the ride.:rockon:
     
  9. Sansuiman

    Sansuiman Active Member

    Messages:
    263
    Location:
    St. Louis, Missouri
    Hang on to that. Unless you are starving and need to raise some cash, once you've finished the work you are doing to it, it will be a rock solid receiver for years to come. The history of this particular 9090DB makes it all the more valuable on a personal level. You fant buy that quality new, and to buy another 9090DB restored (if you sell this one and later regret it) will set you back some serious coin.

    A lot of collectors venerate the G series quite heavily (with good reason) and while they are very good, I have to say the 9090DB - with all idiosyncracies properly addressed - is one heck of a nice receiver worthy of center stage in any vintage hifi setup.
     
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  10. joe camilli

    joe camilli New Member

    Messages:
    9
    Just finished the recap. Now onto re-assemble. BTW I own a pair of DCM TF-250. Purchased them from a dealer, outside of Tuscon I was living in Phoenix, about a year before they when full consumer and were available at Circuit City. Still some the best sounding speakers for the price I have ever heard.
     
  11. Ronald.C

    Ronald.C Active Member

    Messages:
    230
    Location:
    Brazil
    It's a keeper! Please don't sell!
     

     

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  12. Hipocrates

    Hipocrates Anti-Muppet Subscriber

    Messages:
    1,670
    Location:
    Costa Rica
    Very nice, I'm sure you will enjoy it a looooooot.
     
  13. joe camilli

    joe camilli New Member

    Messages:
    9
    Looks like this unit was produced in February, 1977
     
  14. LBPete

    LBPete Rolling Along Subscriber

    Messages:
    11,436
    Location:
    Long Beach, CA
    That looks like a beauty. It's great cosmetics along with it's history makes it a real keeper. With the work you have done, it will serve you until you can pass it on to your kids.

    We are trying to track production changes in this series of receivers. Can you post the serial number and answer a few questions about it's construction?

    It looks like the chassis is silver zinc plated.
    Did the original driver board have round transistors or black diodes mounted at the top of the heat sinks?
    Does the protection board have fuses on it?
    There is a small power supply board just to the left of the tuner board. Sansui changed the position of the filter cap on that board several times during production. How was yours mounted?
    The Dolby board connects to a bank of push switches. Was yours connected with green flex pc board or black ribbon cable?

    This information will be recorded in the Sansui Serial Number Database.

    - Pete
     
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  15. AlTinkster92

    AlTinkster92 AK Subscriber Subscriber

    Messages:
    3,212
    Location:
    NC
    Joe I own a bone stock 8080DB that I sometimes run with fully restored DCM QED's, new bottoms and tops as well and a great combination. Guy that lives down the street from Bob Crites re did em. Enjoy that 9090DB! Al
     
  16. joe camilli

    joe camilli New Member

    Messages:
    9
    Okay here is the latest update on my project. The recap is complete, the relamp is complete and assembly for testing is complete. Would like to get some advice on what to watch for on the FIRST power up after all this work?
     

    Attached Files:

     

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  17. LBPete

    LBPete Rolling Along Subscriber

    Messages:
    11,436
    Location:
    Long Beach, CA
    A dim bulb tester would be a good idea for a first power up.

    - Pete
     

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