DIY 4 channel mixer WIP...

Discussion in 'Home Recording and Studios' started by Bassman96, May 25, 2019.

  1. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Just a little sumptin sumptin I've been planning to make. I need a simple summing mixer to run into my laptop with. That way I can run a mic on the cab and use the direct out from the amp and mix the two how I'd like. Can also run a backing track through it etc etc. I am adding a headphone/monitor out as well that will have it's own power amp section since it needs to drive the headphones or speakers and isn't going into the computer.

    Mixer circuit is done. Just need to do the headphone section and get it enclosed. I am also going to be building a simple mic preamp to go before all this in the chain as well.

    Here is the layout mock up.

    20190525_192422.jpg


    I am toying with the idea of adding a tone stack to each channel but am worried that might introduce hiss or other issues. Might just stick to the K.I.S.S. method on this. Also I will probably run the output into a usb convertor box before the computer.
    Thoughts? Stay tuned....
     
    mb doug, rolie and Kenneth Mountain like this.
  2. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    I guess if it's worth doing it's worth over doing right?

    I started today with a very simple and basic mission. Build anwood box with a metal top to house this in.

    Well that turned into making it out of Walnut with hand cut dovetails. It's been a few years since I've cut those so there will be some filling amd shimming involved lol. Anyhoo.. I have 3.5 of 4 corners done before my boy told me his ear hurt so we had to go to the doc mid project. Then all that is left is to cut the groove for the 1/4" mdf bottom and the lip to screw the face to. Then sanding and a couple coats of satin deft it should be gtg. Gotta get a working printer so I can print out a label for this but that can wait. Stay tuned

    20190526_141802.jpg 20190526_141809.jpg 20190526_141854.jpg
     
    mb doug likes this.
  3. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    One more quick little update....

    Got back from the doc. The boy has an ear infection so he is laid up for now. While he napped I got the last corner cut, bottom panel inset, rear panel cut for future additions (possibly balanced inputs along the backside) that will be covered by an aluminum face plate for now and the mounting strips for the face. Now it sits waiting on glue to dry. Tomorrow I should be able to get the case finished atleast and start boxing all this up. Stay tuned...

    20190526_194817.jpg 20190526_194831.jpg 20190526_194911.jpg
     
    mb doug likes this.
  4. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Well... I've decided I am going to add a 1 knob tone circuit based on the one found on the Fender 5E3 tweed amps. Should help tame or brighten the inputs if needed. Can't wait to sand this tomorrow and drill the faceplate for mounting everything. Just one more piece of gear off the checklist.

    20190526_212420.jpg 20190526_212426.jpg 20190526_212444.jpg
     
    mb doug likes this.
  5. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Nearing the conclusion now. Just need to do all the offboard wiring.

    Got the case finished today. All except for the label that I need to draw up and print out. For now it will have to be label less (printers out of ink and I have to buy a new car now ....). Got it drilled and a couple coats of self etching primet on. Then hit it with some gloss white. The wood parts were finished with a couple coats of Satin Deft then shielding applied. I used a mixture of aluminum tape and copper shielding tape to connect it all together. I get continuity on all points of the interior now so that worked pretty well.

    20190527_123921.jpg 20190527_132214.jpg 20190527_132235.jpg 20190527_140800.jpg
     
  6. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    And here is where I'm at now. Components are installed on the face plate awaiting solder. I went through about 5 different combinations of knobs before settling on this combo. I like the RCA style speed knobs on the headphone and master volume. I was also going with all black on the vol and tone pots but all my black knobs are press on and my volume pots are smooth shaft lol. So white and black it is. I kinda like it though. Can't wait to get it wired up and see if it works like planned. Stay tuned for the conclusion...

    20190527_161806.jpg 20190527_161816.jpg 20190527_161830.jpg 20190527_161835.jpg
     
  7. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Annnnnd it's done! Except the face label but that can go on later.

    I should mention I absolutely hate running offboard wiring. That is my least favorite task but this came out ok I think.

    20190527_194922.jpg 20190527_194927.jpg 20190527_200322.jpg 20190527_200344.jpg
     
  8. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    And here she is all finished. I will try and get a working demo up tomorrow. It's late here. The boy is in bed and I'm done for the day lol. If anyone was reading this. Thanks for following along... 20190527_204928.jpg 20190527_204933.jpg
     
    drewcp and rolie like this.
  9. Worshipcaster

    Worshipcaster Squier-Nut

    844
    Feb 4, 2012
    Dominican Republic
    Such a cool project :cool: Watch out Rupert Neve :D
     
    Bassman96 likes this.
  10. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Thanks man. I have already discovered a few wiring errors so he is safe for now lol. I seem to be pot lug dislexic and have one of the tone caps going to the wrong volume lug on all 4 channels and the volume for the headphones is backwards as well lol. So I have some editing to do tomorrow. Otherwise this works swimmingly and is darn near silent of noise during operation which I was worried about.
     
  11. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Ok! Fixed my boneheaded mistakes from yesterday. Tone circuit works finally! Now I am considering adding an aux switch to each channel that will isolate that channels output strictly to the headphone out and not the master. That way I can play along with tracks without recording them along with my bass line. Shouldn't be too difficult just means 4 more holes I think. I also need to order more switches. My switch bin is getting sparse. Expect a demo sometime today. Just need to locate my patch cables first....

    20190528_090629.jpg
     
    drewcp likes this.
  12. mofojar

    mofojar Squier-holic

    Age:
    37
    May 9, 2019
    Calgary, Alberta
    As an electronics nerd, and a guitar nerd, this pleases me greatly.

    In fact I'm really surprised it took me this long to do basic mods on my own stuff, I find it very enjoyable.
     
    Bassman96 likes this.
  13. so1om

    so1om Squier-Axpert

    Age:
    52
    Feb 10, 2010
    Chicago
    I made something similar back in the.. 80s already? THen for a long time just used an old cassette Tascam 244 for mixing. I still can if I want. But when you can get a 12 channel mixer with a variety of outputs, bridges, effects etc for $100, I got more money than time.

    nice work.
     
  14. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Yep I've got the opposite problem lol. I do however have tons of electronic components and the ability to assemble them into something workable so that's the approach I am taking with my gear re-acquisition. It's also a bit more fun this way...for me atleast.
     
    so1om likes this.
  15. Bassman96

    Bassman96 Squier-holic

    Age:
    41
    Nov 13, 2010
    Oak Harbor, WA
    Just knocked together a quick little mic preamp. I had forgotten that was on the todo list for the studio/practice gear.

    20190528_152446.jpg

    Now I just need to build a desk of some sort to hold this stuff and get a monitor rig together. Slowly but surely it's coming together. Total spent so far is 150 for the bass head lol. This is ghetto/frugal gear aquisition at it's finest!

    20190528_152450.jpg
     
    rolie likes this.
  16. ksandbergfl

    ksandbergfl Squier-Meister

    392
    Sep 7, 2015
    wow, that's super cool.. I used to do stuff like that but I sucked at soldering and my projects all looked like crap.
     
    Bassman96 likes this.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice