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Vintage MXR mods

Discussion in 'DIY Effects Forum' started by Believer7713, Aug 29, 2017.

  1. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    Edit: Something went wrong earlier when i made this thread. I don't know if anyone else could see tyre pics but i couldn't so i reposted it. :Edit
    Since @Raiders757 wanted to see how I did this mod I thought I would share.
    I decided to mod my vintage MXR pedals with true bypass and LED power indicators because I got tired of two things. You guessed it, Tone suck and not being able to look at it and see if it was on. I know I could have just gotten the Whirlwind remakes but they only make a couple of them and though they are just as good, actually better because they have these features and they are made with more reliable components for the playing musician, nothing against collectors but this one really isn't for you. But as an FYI I made these mods to be reversable and kept the original parts that I replaced.


    To start I removed the original switch and rewired the pedal for true bypass using this diagram
    1504027352504.jpg
    1504027378023.jpg
    When I wired it for indicators by I put the 470 ohm (These lights are bright) resistor coming off of the board on the positive leg of the LEDs. For the lighting I used 3 mm LEDs because they fit in the case better than the 5 mm. I also used 4 of them wired in parallel to disperse the light all the way around and make it visible from any angle.
    1504027473896.jpg
    Since these pedals were in really good condition, I really didn't want to drill any holes in the cases so I bought some 3D printed rings to fit a Hammond 1590b enclosure on eBay
    1504027522556.jpg
    that were like these
    http://rover.ebay.com/rover/1/711-5...0001&campid=5338148356&icep_item=332354318223
    except clear instead of pink. (I did, however, have a couple pedals that were pretty thrashed when I got them so I really didn't mind drilling them for power supply sockets and LEDs.)

    I also got a 1spot power supply adapter for each one that attaches to the battery clip so I won't have to worry about batteries going dead. (sag can be a cool effect with fuzz but not so much with modulation pedals IMO)
    1504027617466.jpg
    Then I notched the rings to allow for the plug adapter to fit through without cutting the cases at all.
    1504027637266.jpg
    When it was all done they turned out pretty cool, making my pedal board really unique. here are the finished
    1504027664143.jpg
    1504027669664.jpg
    1504027687974.jpg
    1504027714441.jpg
     
    Last edited: Aug 29, 2017
    1980 and Raiders757 like this.

  2. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    Here are the other pedals that I had that were already holes drilled in them. They have the same mods just don't have the hidden LEDs. Plus I put power jacks in them instead of battery clip adapters.
    My 1978 transition block logo phase 90 that I also did the r28 mod on a switch to. Now its like an EVH phase 90
    1504028330759.jpg
    Without the paint job of course
    And my 1980 micro chorus. When I got it off of eBay someone had painted it green and I was able to strip 99%of the green off of it and save the original.
    1504028489335.png
    1504028498620.png
    1504028510221.jpg
     
    Raiders757 likes this.

  3. Sarnodude

    Sarnodude Senior Stratmaster

    Sep 26, 2015
    Mukilteo
    I blew the IC in my old Distortion plus and I found that it was quite easy to solder in an IC socket, just in case I had to replace it again. In hindsight this is a great mod, because you can easily swap in several different chips to get the sound you are after. One caveat though, the rear case won't quite close properly with the socket installed. But that 3d printed spacer you have would work well, especially with true bypass and an LED. Sorry for the long windy post.
     
    Believer7713 likes this.

  4. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    That's a good idea for sure. and a great way to make easy chip mods to the D+. The one thing I forgot to say about the riser ring is that I did have to go to Lowes and get some longer 6-32 screws to make up the difference.
     

  5. CigBurn

    CigBurn Most Honored Senior Member Strat-Talk Supporter

    Age:
    60
    Jun 22, 2014
    The Shed
    I've been meaning to mod my phase 90 and put the r28 on a switch and drop in an end oriented 9v panel mount power input. Should do that tonight since I have nothing better planned! :)
     
    Believer7713 likes this.

  6. Raiders757

    Raiders757 Senior Stratmaster

    Age:
    47
    Sep 2, 2016
    Virginia
    Thanks for sharing. This is totally wicked. Can't wait to get home from work and give this a better look on my PC monitor.
     
    Believer7713 likes this.

  7. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    In my opinion the r28 mod is the best mod that can be done to the phase 90. Makes it two different pedals in one. Plus I hate running batteries on my board.
     
    CigBurn likes this.

  8. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    Thank you Raiders757. Let us know what you think.
     
    Raiders757 likes this.

  9. CigBurn

    CigBurn Most Honored Senior Member Strat-Talk Supporter

    Age:
    60
    Jun 22, 2014
    The Shed
    OK then well the r28 is clipped and new power supply input is in. Thought I had a mini toggle here to make the mod switchable but apparently not (that I can find anyway). So ordered a half dozen switches and will pop that in once they arrive.

    Will have to give my ears a couple days to adjust to the change but I like it so far.

    mxr Ph90 r28 input mod.jpg
     

  10. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    I find that when I am playing single note stuff that I like the vintage version better. But when I am playing heavy chords with overdrive/distortion I tend to go with the modern version. That's why I like the switch so much.
    Glad you are digging on the sound so far...Like you said it will proabably take a couple days to get used to it though.
     
    CigBurn likes this.

  11. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    Now that you've had some time with, it what do you think about the R28 mod?
     

  12. CigBurn

    CigBurn Most Honored Senior Member Strat-Talk Supporter

    Age:
    60
    Jun 22, 2014
    The Shed
    The difference is subtle but there. I tend to leave it with the r28 switched out, since is seems more subtle. Haven't run it through all the guitars yet to see how it responds using different pickup types. But knowing me, I'll probably use the same setting for 99% of things. All in all I like it, Phase is not something I use a lot but when I do, I have a certain sound in my head I want it to be like, this is definitely closer.

    MXR P90SW1.jpg
     
    Believer7713 likes this.

  13. Believer7713

    Believer7713 Senior Stratmaster

    Age:
    43
    Dec 27, 2016
    US
    Cool, nice work too. Looks clean.
     
    CigBurn likes this.