MOTM DIY parts
This information is for doing DIY, repaneling, and/or repairs on MOTM systems. It's not comprehensive, everyone has preferences, but lists the common/major/most-wanted parts in the MOTM format, and/or what sort of things will work.
- 1 Front panels
- 2 Panels parts
- 3 PCB/Panel mounting
- 4 Internal connectors
- 5 See also
- 6 References
- 7 External links
MOTM panels use U, the 19-inch rack unit for height and width. The height is 5U (8.75"), while the widths are in multiples of 1U (1.75"), with some fraction less to allow for manufacturing tolerances. The finish is baked-on two part Polane paint, giving it a crinkly look, and with labeling and scales in screen printed epoxy-ink.
6061 aluminum alloy, T3 or T6 temper, is easy to come by, can be easily worked. Thickness usually ranges between 1.5 mm (0.62") and 2.5 mm (0.12") but see what is standard for the format, e.g. a thickness of 2.28 mm (0.09") for 4U.
Blank panels can be purchased from:
Panels for specific projects (CGS, I. Fritz, etc.) can be purchased from:
Custom panels can be manufactured by:
Avoid cheap parts, especially if mechanical. Invest in quality, you always get what you pay for. Otherwise your entire system might later develop intermittent faults.
MOTM uses ALCO PKES90B1/4 knobs, available at:
MOTM uses Spectrol 149 pots, available at:
NKK toggle switches with bat handles are the closest fit.
- SPDT: NKK M2102ES1W01 (Allied: 870-8646)
- SPDT center off: NKK M2103ES1W01 (Allied: 870-8647)
- DPDT: NKK M2022ES1W01 (Allied: 870-8652)
- DPDT center off: NKK M2023ES1W01 (Allied: 870-8653)
MOTM uses Switchcraft 112A 1/4" jacks.
MOTM uses 5 mm flat-lens LEDs.
- Red: Lumex SSI-LXH387ID (DigiKey: 67-1155-ND)
- Green: Lumex SSI-LXH387GD (DigiKey: 67-1156-ND)
- Yellow: Lumex SSI-LXH387YD (DigiKey: 67-1157-ND)
Do not mix dissimilar metal terminals and headers. The contact resistance will go up with dissimilar metals, causing all sorts of problems.
MOTM modules and power distribution boards are connected using 4-pin MTA-156 connectors and 18 awg wire. Systems by Encore Electronics use 4 pin 0.156" Molex KK connectors, while those from Oakley Sound Systems use either MTA or Molex KK 0.156" connectors.
- Female cable mount: 640426-4 (Mouser: 571-640-4264)
- Male PCB mount: 640445-4 (Mouser: 571-6404454)
- TE Connectivity 4 pin MTA 156 header (Mouser: 571-6404454)
Oakley Sound Systems designs use either MTA-100 or Molex KK 0.1" for board interconnects.
- ^ Where to get MOTM-style silkscreened panels made?, Muff Wiggler forum, May 2012
- ^ MOTM Info
- ^ What type of aluminium is used for faceplates?, Muff Wiggler forum, June 2013
- ^ Aluminum Panel Guage???
- ^ Muff Wiggler forum:On cheap parts...
- ^ Dave Bradley's Parts list and supplier index for typical MOTM hardware
- ^ MOTM pcb in frac rack format?, Muff Wiggler forum, November 2012
- ^ Molex Connectors Explained, as used in Pinball.
- ^ Muff's Modules & More:Power distribution – updated
- ^ Oakley Sound Systems:Construction Guide
- The 5U DIY Resource Wiki, Muff Wiggler forum
- Dave Bradley's very extensive Parts list and supplier index for typical MOTM hardware.
- About Aluminum, McMaster-Carr
DIY builder sites
- Richard Brewster's Synthesizer
- Bill and Will's MOTM Analog Synthesizer
- Modular Synthesis, LLC:Parts and construction information