Home › Forums › Vintage EHX › 80s EH mini synthesizer

Viewing 11 posts - 46 through 56 (of 56 total)
1 2 3 4
  • Author
    Posts
  • January 29, 2010 at 4:31 pm #106922
    The EH Man
    Moderator
    Quote:
    Quote:
    This very thin strip right here.

    i really don’t understand.. It sound even if the foil is detached from this part. It is the whole contuor of the keybord that close the circuit?

    That outside piece coupled with the individual key is what makes the sound.

    February 1, 2010 at 8:52 pm #107027
    gringoise
    Member

    Thank you EH man, now it is clear.
    The bigger problem now is to replace the keyboard foil. I’m indecied if replace it with a “silver back card” (like the man of the pink EH0400) or clean the original foil with a white oil or something else.

    February 1, 2010 at 9:01 pm #107028
    The EH Man
    Moderator
    Quote:
    Thank you EH man, now it is clear.
    The bigger problem now is to replace the keyboard foil. I’m indecied if replace it with a “silver back card” (like the man of the pink EH0400) or clean the original foil with a white oil or something else.

    If it’s just not triggering right then solder a piece of bare wire in the strip along the side. That helps it make better contact.

    February 7, 2010 at 5:54 pm #107209
    Fender&EHX4ever
    Moderator

    I will be joining the mini synth club soon :D

    I can’t wait!!!!!

    September 3, 2010 at 12:37 pm #111232
    Fender&EHX4ever
    Moderator

    Hey guys, does anyone know what the trimpot values are in the EH-0400?

    September 3, 2010 at 12:59 pm #111233
    The EH Man
    Moderator
    Quote:
    Hey guys, does anyone know what the trimpot values are in the EH-0400?

    They’re 5K.

    September 4, 2010 at 3:57 am #111250
    Fender&EHX4ever
    Moderator
    Quote:
    Quote:
    Hey guys, does anyone know what the trimpot values are in the EH-0400?

    They’re 5K.

    Thank you, EH Man !

    I just picked up another unit, but the previous owner put fixed resistors in place of the trimpot, making it next to impossible to calibrate the pitch across octaves :doh:

    September 9, 2010 at 1:20 am #111314
    Fender&EHX4ever
    Moderator
    Quote:
    They’re 5K.

    Well, I tried 5K, and it made matters worse. BTW, it’s the trim that should go right under the Pitch potentiometer. 5K made the sweep smaller, that is, only the top half of the potentiometer. The signal drops out below about 50%.

    So should I try using a trimpot with a lesser value ?

    September 11, 2010 at 11:39 pm #111360
    The EH Man
    Moderator
    Quote:
    Quote:
    They’re 5K.

    Well, I tried 5K, and it made matters worse. BTW, it’s the trim that should go right under the Pitch potentiometer. 5K made the sweep smaller, that is, only the top half of the potentiometer. The signal drops out below about 50%.

    So should I try using a trimpot with a lesser value ?

    I dunno. 5K is what’s listed on the schematic.

    February 26, 2013 at 4:33 am #118784
    eveready9v
    Member

    Hey there, new to the forum, I have one of these EH-400’s(early one no delay etc.) and it works pretty well, but its calibration is all over the place, I was wondering if anyone can tell me what the three trim pots do? On the schematic I can only find 2 trim pots listed , both at 5k one for fine tuning and the other for intonation. The third trimpot mine has is 1K and it does some thing to the tuning but I can’t figure out in what order I need to calibrate this at. Any help would be amazing!!!!!!!!! Thanks Barry

    January 4, 2024 at 6:11 am #207583
    Tomgop
    Participant

    Maybe the octave?

  • Author
    Posts
Viewing 11 posts - 46 through 56 (of 56 total)
1 2 3 4
  • You must be logged in to reply to this topic.