Forum Replies Created

Viewing 15 posts - 2,476 through 2,490 (of 2,602 total)
  • Author
    Posts
  • in reply to: Older EH Memory Man Not Working – Any Ideas? #93085
    The EH Man
    Moderator

    Sounds like your power supply is OK. The op-amp may do the trick for you.
    It’s really not that complicated for replacing the NE5554. Just a matter of matching pins up with a couple of 15v regulators. If you really need to replace it I’ll post the details here for you and others.
    If you can, while you have it apart attach a heat sink to the NE5554. Might make it last longer and you may never need to replace it.

    in reply to: Older EH Memory Man Not Working – Any Ideas? #93059
    The EH Man
    Moderator

    Assuming your power supply is working correctly and you have +15 and -15, I’d replace the first op-amp because that’s where your bypass signal comes from. If your power supply is bad, replace the NE5554 IC w/ a couple of 3-legged voltage regulators.

    in reply to: Older EH Memory Man Not Working – Any Ideas? #93056
    The EH Man
    Moderator
    in reply to: Vintage Time Machine #92974
    The EH Man
    Moderator

    I already have a DMM (custom w/ blue graphics for a former EHX employee) so I’ll be picking up a Time Machine sometime soon. I’ve started collecting EHX clones since I can’t find EH stuff I don’t have.

    in reply to: Holier Grail – Intermittent Fault: due to overheating? #92921
    The EH Man
    Moderator

    I would suspect a bad solder joint somewhere, possibly on the Blend pot where it solders to the board.

    The EH Man
    Moderator

    EH-5200 should be the Attack Decay pedal. Can you post some pics of your circuit board?

    in reply to: Custom PCBs #92713
    The EH Man
    Moderator

    I think you’d be better off asking your question here:
    http://www.diystompboxes.com/smfforum/index.php#2

    Lots of good DIY info to be found!

    in reply to: How much is my Bad Stone worth? #92678
    The EH Man
    Moderator

    He already has it on ebay w/ a starting bid of $125.

    in reply to: Small Clone Mini-Chorus vs. Full-Chorus #92663
    The EH Man
    Moderator

    You’ve got one of those odd MN3007-only versions from 1980. The other one like that I had info for was from 1981. Thanks for the info. I’ll add it to my list.

    in reply to: tell me about the EH AXIS fuzz #92661
    The EH Man
    Moderator
    Quote:
    i think theres more administrators than actual members. im not sure whos who anyways. they should have more descriptive usernames…

    anyways, i just think i figured it out. its just a weird pedal. hahaha. basically it seems to work like this…

    axisfuzzcharttx3.jpg

    it seems to create two very separate tones. a low toned drive sound and a high range fuzz. with the fuzz knob all the way to the right, youre getting the loudest volume of the drive tone. as you turn it to the left the volume of that signal drops. a little ways into turning, you hear a very quiet high toned fuzz sound start to rise in volume, eventually the low tone dissapears completely, until you get all the way to the left where the high toned fuzz is at its loudest volume. …thats what it sounds like is happening to me anyways… so you fiddle with it until you get something you like, and then adjust the volume knob till its at a matched level to the clean signal. i think it sounds best around 10pm. at 12pm it sounds sort of flubby and weird, like either tone isnt very defined at its low volume…

    this is strange and foreign to me, as im used to my typical method of EH fuzz pedals of “crank all the knobs and thats how it sounds best”

    i dunno, im sure someone with some proper background can shed some more light on this..

    The Axis is a 2 transistor fuzz but not like a Fuzz Face. It’s more like the Double Muff. The way the FUZZ control works is that it’s taking the signal from stage 1 at the extreme counter-clockwise rotation and from stage 2 at the other end. Anywhere in between is mixing the stages. Each stage runs through a fairly small value cap that drops a lot of the bass out. Just think of the FUZZ control as a blend control.
    FWIW, some very early Big Muffs also had a FUZZ control instead of a SUSTAIN, although they used the standard Big Muff circuit.

    in reply to: Company History #92639
    The EH Man
    Moderator

    That was quite a while back. Now you can read it at my site and I update it when I get the chance.

    in reply to: schematic Diagram off metalMuff #92462
    The EH Man
    Moderator

    The schematic is not publicly available. I can tell you that it’s a completely different circuit from the standard Big Muff.

    in reply to: Sonic Boomer #92456
    The EH Man
    Moderator

    You may need to get a Rolling Thunder to produce a really good kick drum effect.

    in reply to: Deluxe Memory Man Calibration #92382
    The EH Man
    Moderator

    My guess is that the bias pots for the delay ICs are off. Probably just needs a little tweak.

    Since you’re an engineer, what you need to do is monitor the output signal of each BBD while adjusting the trimpot. Set the trim where the signal is least distorted. You’ll need to repeat this for each delay IC.

    in reply to: Deluxe Memory Man: input wiring?? #92376
    The EH Man
    Moderator

    Looks like that’s one of the newer ones with the relay true-bypass. The blue wire on the INPUT jack goes to the lug with the blue wire on the DIRECT jack.

    I was just thinking today I should put together some pages with EH boards that show where the wires go.

Viewing 15 posts - 2,476 through 2,490 (of 2,602 total)