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  • January 11, 2010 at 1:22 pm in reply to: 80s EH mini synthesizer #106311
    blindog
    Participant
    Quote:
    Hi all.
    I bought an EH-0400 an I’m very enthusiastic about this synth, I love it.
    It works fine, but it have some triggering problems and it need some little repair.
    Someone that have it can kindly post the instruction manual?
    Please please please! I will be very grateful.

    There are links to the manual in the very first post of this thread ;)

    March 23, 2009 at 12:27 am in reply to: EH 0400 Mini Synthesizer Mods #94797
    blindog
    Participant

    I checked with Synhouse, the company that makes the Midijack module, again and they told me that they did retrofit 3 or 4 Mini Synths, but it requires adding a VCO to the circuit, and even after that, it’s not real stable. They seemed to enjoy bashing the Mini Synth in the response as well 🙄

    I still think it’s a cool piece of history, and makes some phat sounds as well. :thumb:

    I’m still on the quest to put a guitar input on mine though.

    Mark

    March 22, 2009 at 2:28 pm in reply to: EH 0400 Mini Synthesizer Mods #94780
    blindog
    Participant

    Thanks Ron. Do you know anything about the midi circuit? I’ve searched the net for info, and this is the only thing I’ve found: http://www.synhouse.com/midijack.html I’ve emailed them, and they say it will not work the the EH Mini Synth. I should have saved the email, but I think it had something to do with the way it’s triggered with the resistor network on the keyboard.

    How could I add a guitar input? I’ve got a schematic for my EH 0400. Could I copy the circuit that’s in your model and make it work, you think?

    Thanks,

    Mark

    March 17, 2009 at 8:02 pm in reply to: 80s EH mini synthesizer #94600
    blindog
    Participant

    Sorry aabout that DiscoFreq. Many thanks for the link!

    I’m thinking of mounting mine to a rack drawer and putting it in 4U rack with my old Roland DEP-5.

    I’d still love to add a guitar input and/or MIDI functionality if it’s possible. Anyone done that?

    Danieldanger, thanks again for this thread. It’s been cool to ressurect mine from the dead!

    Mark

    March 17, 2009 at 12:54 pm in reply to: 80s EH mini synthesizer #94595
    blindog
    Participant

    What a great setup! That’s a great idea about the rack panels for the bottom. I’ll probably do the same. Did you use angle brackets bolted to the rack panel?

    Great track by he way!

    Mark

    March 15, 2009 at 1:05 am in reply to: 80s EH mini synthesizer #94526
    blindog
    Participant

    Thanks for that link Scott. I didn’t see that before. That was interesting!

    By the way, do you know where I could get some extra plastic tips for the controls? I’m missing a couple. Also, has anyone modified their Mini Synth? It would be cool add a guitar input like the other model. I’ve also heard you can hook it up to a regular keyboard.

    Mark

    March 13, 2009 at 5:02 am in reply to: 80s EH mini synthesizer #94444
    blindog
    Participant

    It Lives! Special thanks to EH Man for verifying the battery/adapter wiring. This thing is just as fun as I remembered it. Very fat! Thanks again to danieldanger for posting the pics of your Mini Synth. Now I need to build something for the bottom. The old cardboard like base disinegrated long ago!

    Mark

    February 23, 2009 at 4:40 am in reply to: 80s EH mini synthesizer #93837
    blindog
    Participant

    Hello everyone. I’m so glad I stumbled upon this forum! I’ve had my Mini Synth since about 1986. For some unknown reason, a few years later I robbed it of some parts (9 volt clips, wiring for the keyboard….I was only 19 ;)) With the help of the pics in this thread, I was able to figure out the missing pieces of my puzzle. Thanks to the original poster!

    I’m still stuck on the power supply. I highlighted the areas in the pic. The blue arrows are where I think the wire goes.**edit* The blue arrow on the pcboard is hard to see, it’s about 2 inches from the left and about 1 inch down** The red lines are where I think the 9 volt battery positve goes, and the black lines are where I think the 9 volt battery negative goes. Can anyone verify this? Many thanks in advance.

    Mark

    EHMiniSynth.jpg

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