An Attempt At Fisher 400C Transformation...

Discussion in 'Fisher' started by Tysen, Apr 16, 2018.

  1. RUmad

    RUmad AK Subscriber Subscriber

    Messages:
    908
    Location:
    New York
    Yeah, I got the extra solder tip from notdigital’s thread. The first bulb I tried that on, IMMEDIATELY melted thru the tip and fried the element with molten solder. Figured I’d attempt another route. lol
     
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  2. Tysen

    Tysen Active Member

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    224
    Location:
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    "EDIT; I don’t mean that I widened the entire socket! Just pushed that flat spot out far enough for the bulbs to screw in past it!"

    Got it!

    The aquarium airline hose idea is genius.
     
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  3. Tysen

    Tysen Active Member

    Messages:
    224
    Location:
    Los Angeles
    Unless someone points out an issue with my voltage readings, I think that's a wrap until I tackle the phono section in the upcoming weeks. The bulbs, it turns out, were arcing. Once I widened the sockets (thanks @RUmad!) and tightened them (5 fried bulbs later), no trouble in sight. I removed the top cover for better access and that enabled me to tighten with my pliers without the bulbs separating from their base.

    I also installed new AC lines and a lamp switch to preserve the internal power switch (not grounded to the chassis).

    Tomorrow I'll run the pre through my MC30s and report back (with better photos). VERY excited. Hopefully things have quieted down!



    IMG_6950.JPG
    IMG_6949.JPG IMG_6951.JPG
     
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  4. Tysen

    Tysen Active Member

    Messages:
    224
    Location:
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    Well, the pre sounds amazing. I think I'm in love. Wow. Can't wait to do the phono mod!!
    Pictures of her in my system:
    IMG_7006.JPG IMG_7008.JPG IMG_7009.JPG


    Video link on youtube:
     
  5. RUmad

    RUmad AK Subscriber Subscriber

    Messages:
    908
    Location:
    New York
    Good on you man. Well done, congratulations. Looks great. Sounds great. Feels great too, don’t it? Enjoy.
     
  6. Tysen

    Tysen Active Member

    Messages:
    224
    Location:
    Los Angeles
    Thanks @RUmad

    It feels so good—this has been my toughest project to date, so it's that much sweeter!


    @dcgillespie Thank you so much for doing all that ground work, and for offering me some guidance along the way. I'm very appreciative.



    After listening to some vinyl for a couple of hours today, I will say that the phono section does lacks some low-end, and the highs are little more accentuated than what I'm used to. Can't wait to tackle the phono section mod. To be continued.
     

     

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  7. thornev

    thornev Active Member

    Messages:
    373
    Location:
    Mid Hudson Valley, NY
    A Mac for each channel ?! Good lord ! THAT'S what I call a stereo system ! My eyes started rumbling just by looking at it...LOL.
     
  8. dcgillespie

    dcgillespie Fisher SA-100 Clone Subscriber

    Messages:
    9,416
    Location:
    Ball Ground, GA
    Glad it's working well for you! My 400C is still my favorite pre.......

    Dave
     
  9. Tysen

    Tysen Active Member

    Messages:
    224
    Location:
    Los Angeles
    Lol. Yeah. MC30s are the best. I think I'd sell everything else in my system before I'd sell them.

    So glad it's working well...thanks to you. Seriously, you should start some sort of donations account that we can donate to. Both my systems (bedroom, Magnavox 93xx) and now my main system hold your stamp!
     

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