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

An Attempt At Fisher 400C Transformation...

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

  1. RUmad

    RUmad AK Subscriber Subscriber

    Messages:
    942
    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
     
    Tysen likes this.

     

    Please register to disable this ad.

  2. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    "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.
     
    RUmad likes this.
  3. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    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
     
    kbuzz, AlTinkster92 and RUmad like this.
  4. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    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:
    942
    Location:
    New York
    Good on you man. Well done, congratulations. Looks great. Sounds great. Feels great too, don’t it? Enjoy.
     
  6. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    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.
     

     

    Please register to disable this ad.

  7. thornev

    thornev Well-Known Member

    Messages:
    558
    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:
    9,775
    Location:
    Ball Ground, GA
    Glad it's working well for you! My 400C is still my favorite pre.......

    Dave
     
  9. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    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!
     
  10. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    Hi Folks,

    Well, I've been the fisher since May and I love it.

    Here's an issue I never posted about: I get no sound out of Aux 1. Tuner and Aux 2 play perfectly. I also only get sound out the left channel out of phono section (both inputs). I've triple checked everything coming from the turntable—all wires are good. Should I clean the contacts on the selector? Because I get great sound from Tuner and Aux2, I'm assuming I just need to clean something.

    Any guidance would help.

    Best,
    Tysen
     
  11. dcgillespie

    dcgillespie Fisher SA-100 Clone Subscriber

    Messages:
    9,775
    Location:
    Ball Ground, GA
    For starters, make sure that the Aux 1 and Phono level controls in both channels are turned up full (as a starting point anyway). These are recessed behind four small holes, with two on either side of the top of the push-button switch cover, and take a medium size jeweler's flat head screwdriver to adjust.

    Let us know!

    Dave
     

     

    Please register to disable this ad.

  12. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    Thanks Dave.

    The level controls are both turned counter clockwise—still nothing :( Should I perhaps get some rubbing alcohol and clean the selector contacts?
     
  13. dcgillespie

    dcgillespie Fisher SA-100 Clone Subscriber

    Messages:
    9,775
    Location:
    Ball Ground, GA
    As you face the shaft, like any level/volume control, you advance the level with clockwise rotation, while counter clockwise reduces it. Full counter clockwise rotation should result in no signal -- unless the controls are wired backwards.

    Dave
     
  14. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    Sorry Dave, I meant to say they are both fully turned CLOCKWISE, not counterclockwise wise.
     
  15. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

    Messages:
    21,895
    Location:
    Glen Burnie Md.
    Rubbing alcohol will just polish the Environmental crud that has built up on the switches/contacts. You need to get a can of CAIG "DE-OXIT" DN5 and a can of "FADERLUBE" F-5. The DN5 will soften the crud and with friction will clear it off the contacted area leaving a CLEAN CONTACT. Finish off with the Faderlube to lubricate it as the DN5 washes out a lot of the origina llubricants also. Read this thread.......... http://audiokarma.org/forums/index.php?threads/the-idiots-guide-to-using-deoxit-revisited.207005/ in the General Audio Forum.
     
  16. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    Thanks Larry!

    I'll take your advice and try it tomorrow.
     

     

    Please register to disable this ad.

  17. Tysen

    Tysen AK Subscriber Subscriber

    Messages:
    245
    Location:
    Palm Springs, CA
    Used Deox on the selector switch and now we got Aux 1 back, and the phono section. All is well :)
     
    RUmad likes this.

Share This Page