Home › Forums › Help/Technical Questions › EHX Electric Mistress – vintage pedal power supply

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  • April 21, 2010 at 10:40 pm #79570
    gyarugo
    Member

    Hi! I’m new here so please don’t be too harsh if I ask some stupid questions. I’m from Poland, I play guitar for 2 years and a half and 2 days ago I bought my first EHX pedal ever – It’s an Electric Mistress Flanger. It’s very old (the previous owner said it’s about 30 years old) and I have a problem with making it work. I know it works ok, because the guy I bought it from sent me a YouTube video of it and it sounds awsome, but I don’t know what kind of power supply does it need.

    It has the standard small jack power supply input, but I don’t know the polarization and the voltage. I don’t want to screw the pedal up, so maybe some more experienced users will know how do help me. Unfortunately I can’t buy an original EHX power adapter – not in Poland so I need to get a different one. Can somebody help me?

    cheers from Poland and thx for the help in advance ;-)
    gyarugo

    April 22, 2010 at 12:22 am #91905
    The EH Man
    Moderator

    If it has 2 battery clips inside, it needs an 18vdc power supply w/100mA current. The connector is a 3.5mm plug with the tip positive.

    April 22, 2010 at 7:20 am #91851
    gyarugo
    Member

    Thx :) Unfortunately it doesn’t have any battery connectors inside. There isn’t even any information on the polarization on the PCB.
    I tried to connect a standard 9V 600 mA power supply with positive tip, and it made these “broken” sounds. So maybe the voltage is too low, but I don’t want to break it.
    Here’s a link to the auction I bought it from with some photos of the inside. Maybe this will help.

    http://www.allegro.pl/item1005206028_electroharmonix_flanger_filter_matrix_vintage_80_s.html

    April 22, 2010 at 9:38 am #91844
    The EH Man
    Moderator

    It’s 18v.

    April 22, 2010 at 11:01 am #91845
    Fender&EHX4ever
    Moderator
    Quote:
    Thx :) Unfortunately it doesn’t have any battery connectors inside. There isn’t even any information on the polarization on the PCB.

    (to see the full pic, just right click on the pic and open in new window)

    2191370552_44806008f7_b.jpg

    April 23, 2010 at 5:15 pm #109178
    gyarugo
    Member

    Thx for the help. I connected an 18V power supply to the flanger and.. unfortunately nothing happens. I get sound with the effect on and off, one is bypass for sure, the other is a bit like if I was using a compressor, but there is no flanger effect AT ALL. I even located the wires for the batteries inside (someone has cut them, that’s why I didn’t notice them before – thx a lot for the photo – it helped to locate them) and connected 2 9V batteries – still I get no flanger at all. What can be wrong?
    The guy I bought it from did a demo for me and it worked perfectly well even with a 12V adapter (or so he claims).

    PS When I connect a 9V power adapter I get sth like a ‘broken’ flanger effect – I mean there is sth that resembles a flanger but it sounds awful.
    Can you help me? Thx in advance.

    gyarugo

    April 23, 2010 at 5:32 pm #107389
    The EH Man
    Moderator

    If he was using a different adapter it may need to be calibrated. Turn the blue trimpot on the right a bit and see if it starts working. Mark the original position with a marker first so you can set it back.

    April 23, 2010 at 6:01 pm #107390
    gyarugo
    Member

    It doesn’t help. I’m running on batteries and turning it in both directions, I ran out of range and the only thing I get is distortion or some kind of ‘police car’ noise that continues even if I stop playing. By pot on the right you mean the one on the right on the photo?

    April 23, 2010 at 6:16 pm #109366
    The EH Man
    Moderator

    Yes, the one on the right in the photo above. The other pot controls the feedback.

    April 23, 2010 at 6:18 pm #109368
    gyarugo
    Member

    Thx. Still no result :-( Any other suggestions?

    April 23, 2010 at 6:21 pm #109369
    The EH Man
    Moderator

    No. You’ll need to either return it to the seller or take it to a tech.

    April 23, 2010 at 7:00 pm #109370
    gyarugo
    Member

    Thx, for the help, If I manage to make it work I’ll write what caused the problem. If anyone has any other ideas – please write. Cheers!

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