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StewMac Swell Drive Pedal Kit

StewMac Swell Drive Pedal Kit

StewMac Swell Drive Pedal Kit With Bare Enclosure

With Bare Enclosure

Item # 2355
In stock, ready to ship!
20% OFF SALE

$90.43
$72.34

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StewMac Swell Drive Pedal Kit With White Enclosure

With White Enclosure

Item # 2355-W
In stock, ready to ship!
20% OFF SALE

$91.68
$73.34

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StewMac Swell Drive Pedal Kit

About This Item

Get your hands on this ultra-rare pedal
We found a small stash of the out-of-production chips to resurrect the coveted BOSS Slow Gear. Now you can build your own version of this unique pedal.

Only available from 1979-1982, the Slow Gear is an awesome and quirky effect. The variable auto swell sounds like a violin bow or even reverse delay. The components for this pedal were always in short supply, and it disappeared from stores nearly as quickly as it arrived.

Don't buy your next pedal—build it!
The Slow Gear is considered to be one of the rarest BOSS pedals—clean examples sell for 3-4 times the original price! We love this fun circuit so much we tracked down the scarce chips to make this limited pedal kit. Now for less than the original price, you can build it!

Get them before they're gone! These chips are still very hard to find, so when our stock is gone, this pedal will disappear again.

It's more than just a schematic
We include everything you need to build your new pedal:

  • Top quality components from resistors to switch
  • Road-worthy rugged metal enclosure with all holes pre-drilled
  • Bare or powder coated white finish
  • 3PDT breakout board for low noise
  • Input, output, and power jacks rear mounted for easy cable routing
  • True bypass switch
  • Custom printed labels
  • Easy! Download your instructions
    We've made these instructions ready to download now. You can zoom in on every solder joint and resistor value to make sure your build is perfect from start to finish. With these step-by-step instructions, full color illustrations, and complete wiring guide you'll build a pedal you'll enjoy for a lifetime. Be proud every time you step on the custom pedal that you built.

    Make your pedal your way
    It's never been easier to have an inspiring sounding and looking pedal. We include labels for all of the knobs for a professional look. Paint your own raw metal enclosure or choose a powder coated enclosure that is ready to put on your board now.

    Take the first step to customize your sound.



    CALIFORNIA PROPOSITION 65 WARNING
    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


    Video

    Instructions

    Product Instructions

    StewMac Pedal Kit Instructions

    Download the assembly guide and wiring diagrams.

    Customer Reviews

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    5.0
    • 4.80 average rating from 10 reviews
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    5.0

    Great first project

    By

    Verified Buyer


    This was my first time doing a major soldering project, and the well-labeled board and clear online instructions made it very easy. Trying to identify all the resistors was kind of a pain, but useful practice for the future. Despite not having the perfect tip for my soldering iron, it all turned out well, with a functioning pedal. Highly recommended!

    5.0

    Fabulous

    By

    Verified Buyer


    Went together easily, but I have some electronics experience. I did have to file out the holes for the audio jacks... the paint closed them in just enough to block the parts.

    It certainly functions much better than a modern digital equivalent which often lets the first few milliseconds of a signal through before slamming the envelope shut on it.

    I can't stress enough the importance of having a multimeter or "part identifier" on hand to help sort out the pile of passives... and a serious magnifier.


    5.0

    This is a fun pedal...

    By

    Verified Buyer


    I built this but had a problem. I sent pictures and Tommy spotted it and sent me a part. I’ve made or repaired lot of pedals but this service was exceptional. As an weekend luthier Stewmac is a blessing.
    The pedal has a nice rise but I’m going to figure out how to really relax it.

    4.0

    Some QC issues, but all's Swell in the end.

    By

    Verified Buyer


    Look, I love Stewmac and the stuff that I've learned from their videos and products has been amazing, but this project was more frustrating than it needed to be. I am an experienced pedal builder and bought this kit because it was unique. I got everything soldered and wired up and then...

    Discovered that the holes for the 1/4" jacks were too small. Back upstairs to the drill, grateful that I didn.t spend too much time on the paint job. Got the holes drilled, put everything together, plugged her in and...nothing. After scrutinizing my soldering and reviewing the instructions, I noticed pages in which 4Mohm resistors turbed into 1Mohm resistors. Which illustrations were correct. Fortunately, I emailed StweMac before I started swapping resistors, sent them photos, and Tommy noticed that...

    I had been sent the wrong chip. The correct ship arrived in a few short days.

    I plugged it in and everything worked well until...

    The poser went out. The DC jack was dodgy and made intermittent contact. No problem, I have plenty of my own but this would require a bigger hole. Again, to the drill...

    At last, everything is working well and this is truly a unique little pedal but, OY!

    The Screamer went swimmingly. Next up, the Tape Op Delay and, yes, I've already checked the holes.

    5.0

    A great SWELL pedal!

    By

    Verified Buyer


    I bought this pedal kit to build and use with my guitar and I'm very pleased with it. It does have a fairly large number of components and they ARE placed tightly together..... so it does take some good soldering skills to build this pedal. I do recommend using jewelers glasses to build this.... unless your eyesight is incredible. StewMac sells these glasses and they are well worth it, for something like this.

    5.0

    Bravo Tommy !

    By

    Verified Buyer


    The PCB and components were damaged during assembly and the whole kit was replaced. Thank you !!

    5.0

    It's LEGO with a soldering iron

    By

    Verified Buyer


    Swell Drive build kit contains a very well made printed circuit board.

    The components & parts are well separated.

    There ain’t no need to read no instruction as info and component values are marked on the PCB surface.

    The instruction is just a guide. It’s like LEGO Bricks with a soldering iron.

    There is enough pad and ample gap to prevent solder bridging.

    I bought 2 Swell Drive kits and build the 1st kit within a span of 2 hours.

    The volume swell effect of the SWELL DRIVE is way better than the original BOSS SG-1 Slow Gear! Maybe BOSS should buy the Swell Drive kit and learn from it to design a Waza Craft version of the SG-1.

    I leisurely build up the 2nd Swell Drive kit within 90 minutes while watching TV.

    I will be purchasing more Swell Drive kits to build, hoard and sell in the used vintage market as they may appreciate in value.

    5.0

    It works!

    By

    Verified Buyer


    Overall very clear instructions. I noticed one graphic where the resistor stripe in the illustration list was black, but orange in the drawing of where it goes. Being careful to follow the Ohms, as listed, and printed on the PCB and sorting everything out in advance worked. Having a multimeter handy to be sure one has read the stripes correctly was helpful with the tiny resistors. Everything went together great. Fishing the LED leads thru back of PCB, while not being able to see them, during assembly was tricky, and after soldering kinda made it so you could not take it apart again.. If I had it to do again, I might solder 2” insulated hookup wire to the leads to make it easier to fish, and then you could also take apart and “service it”. Oh, speaking of hookup wire, very carefully measuring the cutting of the wire will make a difference in how everything “hangs together”. I loved making this! (And it works great.)

    4.0

    Fun kit

    By

    Verified Buyer


    Overall fun and easy project. Instructions easy enough to follow. Use caution when cutting wire. There is absolutely no room for error if you make a mistake cutting wires or stripping ends. If you don’t have that gauge wire on hand you will be looking for some. Seems to be an issue making sure set screws for control knobs are present when packaged some are missing. Finally when labeling your pedals input and output follow installation instructions. Photos of pedal on site show them reversed.

    5.0

    Easy to build, works perfectly

    By

    Verified Buyer


    Following the step to step instructions, this was a really easy build. Mostly the pictures alone suffice.
    There are a few small issues though. In some places, the illustrations don't perfectly correspond with the text but with some thought and inspection of the writing and marking on the parts, pcb, this is easy to figure out.
    Also on the resistors the rings are hard to read sometimes as red and brown and sometimes black and blue look nearly identical so this takes some guessing and comparing to other parts. The marking for one of the pots on the pcb is also wrong but since the other one is correct it's obvious. Finally, if you buy the white case, you'll need to remove the paint from the holes for the jack sockets as they would be too tight otherwise.
    Having finished the project in two days - putting all the parts on the pcb on the first and soldering and assembling on the second (not the whole days, just a few hours each) the pedal works pefectly and is fun. Perfect little Corona project.

    Response from StewMac


    Hi Sam,

    Thank you for sharing your honest feedback with us, we genuinely appreciate that. You have raised some excellent points. We are working quickly to make changes in the instructions that you noted in this review. Also, we recommend in the instructions to use a multimeter to find the values of any resistors that are too small to read the color bands on. Thanks again for the excellent feedback!