MU parts: Difference between revisions

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[[File:MU panel flanges.jpg|thumb|250px|Detail of MU panel showing flanges for stiffening and for mounting.]]
[[File:MU panel flanges.jpg|thumb|250px|Detail of MU panel showing flanges for stiffening and for mounting.]]
=== Specifications ===
=== Specifications ===
See synthesizers.com:[http://www.synthesizers.com/technical.html#panels Panels]
See synthesizers.com:[https://web.archive.org/web/20100104235751/http://synthesizers.com/technical.html#panels Panels]
=== Blank panels ===
=== Blank panels ===
The panels are made using 1.5mm (0.062") aluminium, which is thinner than that used for [[MOTM DIY parts#Blank panels|MOTM front panels]]. They're strengthened by the sides being bent over to form flanges. To mount them into the rack, the face of the panel is extended at the top and bottom by 0.4".<ref name="dotcom">[http://www.synthesizers.com/technical.html Technical Information], Synthesizers.com</ref>
The panels are made using 1.5mm (0.062") aluminium, which is thinner than that used for [[MOTM parts#Blank panels|MOTM front panels]]. They're strengthened by the sides being bent over to form flanges. To mount them into the rack, the face of the panel is extended at the top and bottom by 0.4".<ref name="dotcom">[https://web.archive.org/web/20100104235751/http://synthesizers.com/technical.html Technical Information], Synthesizers.com</ref>


Blank panels can be purchased from:
Blank panels can be purchased from:
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== Panel parts ==
== Panel parts ==
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.<ref>Muff Wiggler forum:[http://www.muffwiggler.com/forum/viewtopic.php?p=861269 On cheap parts...]</ref>
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.<ref>Mod Wiggler forum:[https://www.modwiggler.com/forum/viewtopic.php?p=861269 On cheap parts...]</ref>
=== Knobs ===
=== Knobs ===
Dotcom ([http://www.synthesizers.com/ Synthesizers.com]) use fluted dual-dot 1" Moog-style/[[Cosmo Corporation knobs]], available at:
Dotcom ([http://www.synthesizers.com/ Synthesizers.com]) use fluted dual-dot 1" Moog-style/[[Cosmo Corporation knobs]], available at:
* [http://www.smallbearelec.com/servlet/Detail?no=739 Small Bear]
* [http://www.smallbearelec.com/servlet/Detail?no=739 Small Bear]
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
For pointer knobs, Dotcom use {{sfrac|1|1|8}}" Moog-style/Cosmo Corporation skirted pointer knobs, available at:
For pointer knobs, Dotcom use {{sfrac|1|1|8}}" Moog-style/Cosmo Corporation skirted pointer knobs, available at:
* [http://www.smallbearelec.com/servlet/Detail?no=1109 Small Bear]
* [http://www.smallbearelec.com/servlet/Detail?no=1109 Small Bear]
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
=== Potentiometers ===
=== Potentiometers ===
Synthesizers.com use Alpha single-gang 24&nbsp;mm pots, available at:
Synthesizers.com use Alpha single-gang 24&nbsp;mm pots, available at:
* Mouser 100K linear [http://uk.mouser.com/Search/Refine.aspx?Keyword=31VA501-F 31VA501-F] and 100K log [http://uk.mouser.com/Search/Refine.aspx?Keyword=31VJ501-F 31VJ501-F]
* Mouser 100K linear [http://uk.mouser.com/Search/Refine.aspx?Keyword=31VA501-F 31VA501-F] and 100K log [http://uk.mouser.com/Search/Refine.aspx?Keyword=31VJ501-F 31VJ501-F]
* [http://www.smallbearelec.com/servlet/Detail?no=9 Small Bear Electronics]
* [http://www.smallbearelec.com/servlet/Detail?no=9 Small Bear Electronics]
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com] 100K, 1M
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com] 100K, 1M
=== Switches ===
=== Switches ===
..., available at:
..., available at:
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com] DPDT, SPDT
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com] DPDT, SPDT
=== Pushbuttons ===
=== Pushbuttons ===
..., available at:
..., available at:
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
=== Jacks ===
=== Jacks ===
Dotcom modules use enclosed mono [[Switchcraft]]-style jacks, available at:
Dotcom modules use enclosed mono [[Switchcraft]]-style jacks, available at:
* [http://www.smallbearelec.com/servlet/Detail?no=90 Small Bear Electronics]
* [http://www.smallbearelec.com/servlet/Detail?no=90 Small Bear Electronics]
* [http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
* [https://web.archive.org/web/20110716181608/http://www.synthesizers.com/cabinets.html#parts Synthesizers.com]
Switched {{sfrac|4}}" jacks are especially handy for [[normalising]] jack connections.
Switched {{sfrac|4}}" jacks are especially handy for [[normalising]] jack connections.
=== LEDs ===
=== LEDs ===
...
...
Panel components sold by Synthesizers.com come with 6" wires and [[MTA]] connector.
Panel components sold by Synthesizers.com come with 6" wires and [[MTA Connector]] connector.
=== PCB Mounting ===
=== PCB Mounting ===
Synthesizers.com and some independent manufacturers mount the PCB parallel to the panel with [[standoff]]s, others mount PCBs perpendicular MOTM-style. [[PCB mounting bracket|4-40 steel mounting brackets]] are fine for this and also work with [[CGS]] boards.
Synthesizers.com and some independent manufacturers mount the PCB parallel to the panel with [[standoff]]s, others mount PCBs perpendicular MOTM-style. [[PCB mounting bracket|4-40 steel mounting brackets]] are fine for this and also work with [[CGS]] boards.
Line 58: Line 58:
For perpendicular mounting with [[stooge brackets]] affixed by the pots or jacks, available at:
For perpendicular mounting with [[stooge brackets]] affixed by the pots or jacks, available at:
* [http://bridechamber.com/Brackets.html Bridechamber]
* [http://bridechamber.com/Brackets.html Bridechamber]
* [http://synthcube.com/cart/index.php?route=product/search&filter_name=bracket Synthcube]
* [https://web.archive.org/web/20180228193533/http://synthcube.com/cart/index.php?route=product%2Fsearch Synthcube]
Threaded right-angle brackets (Mouser: 534-621) can be mounted to the panel, using the 4-40 steel {{sfrac|3|8}}" black oxide phillips pan head screws.<ref name="gf" />
Threaded right-angle brackets (Mouser: 534-621) can be mounted to the panel, using the 4-40 steel {{sfrac|3|8}}" black oxide phillips pan head screws.<ref name="gf" />


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Dotcom uses MTA-100 connectors, using 24 awg wire. To fit the wires to the connectors, use the AMP MTA key style maintenance tool: AMP 59803-1 (DigiKey: A9982-ND).
Dotcom uses MTA-100 connectors, using 24 awg wire. To fit the wires to the connectors, use the AMP MTA key style maintenance tool: AMP 59803-1 (DigiKey: A9982-ND).
=== Module power ===
=== Module power ===
Power supplies are connected using 6 way keyed MTA-100 connectors.<ref>http://www.synthesizers.com/technical.html#internaldc Internal DC Module Power – 6 pin MTA]</ref><ref name="mw1739">Muff's Modules & More:[http://www.muffwiggler.com/forum/viewtopic.php?t=1739 Power distribution – updated]</ref>
Power supplies are connected using 6 way keyed MTA-100 connectors.<ref>[https://web.archive.org/web/20100104235751/http://synthesizers.com/technical.html#internaldc Internal DC Module Power – 6 pin MTA]</ref><ref name="mw1739">[https://www.modwiggler.com/forum/viewtopic.php?t=1739 Power distribution – updated], Mod Wiggler forum, Sep 2008</ref>
{| class="wikitable"
{| class="wikitable"
!pin!!Voltage
!pin!!Voltage
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* Male PCB mount: AMP 6404562 (Mouser: 571-6404562)
* Male PCB mount: AMP 6404562 (Mouser: 571-6404562)


3-pin MTA-100 connectors are used for switches and pots.<ref>www.synthesizers.com:[http://www.synthesizers.com/technical.html#internalpot Internal Pot/Switch – 3 pin MTA]</ref>
3-pin MTA-100 connectors are used for switches and pots.<ref>[https://web.archive.org/web/20100104235751/http://synthesizers.com/technical.html#internalpot Internal Pot/Switch – 3 pin MTA], Synthesizers.com</ref>
{| class="wikitable"
{| class="wikitable"
!pin!!Connection
!pin!!Connection
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* Female cable mount: AMP 6404413 (Mouser: 571-3-640441-3)
* Female cable mount: AMP 6404413 (Mouser: 571-3-640441-3)
* Male PCB mount: AMP 6404563 (Mouser: 571-6404563)
* Male PCB mount: AMP 6404563 (Mouser: 571-6404563)
⚫
{{From Muff Wiggler wiki|MU DIY resources}}


== See also ==
== See also ==
* [[MOTM DIY parts]]
* [[MOTM parts]]


== References ==
== References ==
⚫
{{From Mod Wiggler Wiki|MU DIY resources}}
⚫
* [https://www.modwiggler.com/forum/viewtopic.php?t=36380&start=all&postdays=0&postorder=asc The 5U DIY Resource Wiki], Mod Wiggler forum
{{reflist}}
{{reflist}}

⚫
* [http://www.muffwiggler.com/forum/viewtopic.php?t=36380&start=all&postdays=0&postorder=asc The 5U DIY Resource Wiki], Muff Wiggler forum
== External links ==
== External links ==
* Synthesizers.com:[http://www.synthesizers.com/technical.html Technical information]
* Synthesizers.com:[https://web.archive.org/web/20100104235751/http://synthesizers.com/technical.html Technical information]
* [http://www.mcmaster.com/#standard-aluminum-sheets/=xe70s0 About Aluminum], McMaster-Carr
* [http://www.mcmaster.com/#standard-aluminum-sheets/=xe70s0 About Aluminum], McMaster-Carr
=== Schematics, PCB overlays, BOMs and assembly instructions ===
=== Schematics, PCB overlays, BOMs and assembly instructions ===
* [http://yusynth.net/index_en.php YuSynth]
* [http://yusynth.net/index_en.php YuSynth]
* [http://www.musicfromouterspace.com/ Music From Outer Space]
* [https://web.archive.org/web/20060111050127/http://www.musicfromouterspace.com/ Music From Outer Space]
* [http://cgs.synth.net/ CGS]
* [https://web.archive.org/web/20170430151727/http://cgs.synth.net/ CGS]
=== Lists of preferred parts ===
=== Lists of preferred parts ===
* [http://www.oakleysound.com/parts.pdf Oakley Sound Systems, Parts Guide]
* [http://www.oakleysound.com/parts.pdf Oakley Sound Systems, Parts Guide]
<!-- Eurorack?
<!-- Eurorack?
* [https://www.muffwiggler.com/forum/viewtopic.php?p=971680 Thread for your component suppliers references...?], Muff Wiggler forum, Oct 2012
* [https://www.modwiggler.com/forum/viewtopic.php?p=971680 Thread for your component suppliers references...?], Mod Wiggler forum, Oct 2012
* [https://www.muffwiggler.com/forum/viewtopic.php?t=86951 SDIY Partslist spreadsheet], Muff Wiggler forum, Jun 2013
* [https://www.modwiggler.com/forum/viewtopic.php?t=86951 SDIY Partslist spreadsheet], Mod Wiggler forum, Jun 2013
* [https://bitbucket.org/cheater/synth-parts cheater/synth-parts], Bitbucket
* [https://bitbucket.org/cheater/synth-parts cheater/synth-parts], Bitbucket
* [https://github.com/TomWhitwell/MTM-Parts-Library/ Music Thing Modular Eagle Parts Library] -->
* [https://github.com/TomWhitwell/MTM-Parts-Library/ Music Thing Modular Eagle Parts Library] -->

Latest revision as of 18:09, 15 February 2023

This information is for doing DIY, repaneling, and/or repairs on MU systems. It's not comprehensive, everyone has preferences, but lists the common/major/most-wanted parts in the MU format, and/or what sort of things will work.

Front panels

Detail of MU panel showing flanges for stiffening and for mounting.

Specifications

See synthesizers.com:Panels

Blank panels

The panels are made using 1.5mm (0.062") aluminium, which is thinner than that used for MOTM front panels. They're strengthened by the sides being bent over to form flanges. To mount them into the rack, the face of the panel is extended at the top and bottom by 0.4".[1]

Blank panels can be purchased from:

Project panels

Panels for specific projects (CGS, YuSynth, etc.) can be purchased from:

Custom panels

Custom panels can be manufactured by:

For FPE and Schaeffer, you need to supply the blank MU panel.

Panel parts

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.[2]

Knobs

Dotcom (Synthesizers.com) use fluted dual-dot 1" Moog-style/Cosmo Corporation knobs, available at:

For pointer knobs, Dotcom use 1+1/8" Moog-style/Cosmo Corporation skirted pointer knobs, available at:

Potentiometers

Synthesizers.com use Alpha single-gang 24 mm pots, available at:

Switches

..., available at:

Pushbuttons

..., available at:

Jacks

Dotcom modules use enclosed mono Switchcraft-style jacks, available at:

Switched 1/4" jacks are especially handy for normalising jack connections.

LEDs

... Panel components sold by Synthesizers.com come with 6" wires and MTA Connector connector.

PCB Mounting

Synthesizers.com and some independent manufacturers mount the PCB parallel to the panel with standoffs, others mount PCBs perpendicular MOTM-style. 4-40 steel mounting brackets are fine for this and also work with CGS boards.

PCBs can be mounted parallel using 1" (Mouser: 534-8405) and 1+1/4" (Mouser: 534-8407) threaded standoff posts. Black oxide screws, like the ones used by Synthesizers.com, are used to affix the standoffs to the front panel. Specifically, 4-40 steel 3/8" black oxide phillips pan head screws,[3] are available from Aaron's Machine Screws.

For perpendicular mounting with stooge brackets affixed by the pots or jacks, available at:

Threaded right-angle brackets (Mouser: 534-621) can be mounted to the panel, using the 4-40 steel 3/8" black oxide phillips pan head screws.[3]

Internal connectors

Do not mix dissimilar metal terminals and headers. The contact resistance will go up with dissimilar metals, causing all sorts of problems.[4]

Dotcom uses MTA-100 connectors, using 24 awg wire. To fit the wires to the connectors, use the AMP MTA key style maintenance tool: AMP 59803-1 (DigiKey: A9982-ND).

Module power

Power supplies are connected using 6 way keyed MTA-100 connectors.[5][6]

pin Voltage
1 +15 (white)
2 key – pin missing and plugged
3 +5 (red)
4 GND (black)
5 -15 (green)
  • Female cable mount: AMP 6404416 (Mouser: 571-3-640441-6)
  • Male PCB mount: AMP 6404566 (Mouser: 571-6404566)

Panel connectors

2-pin MTA-100 connectors are used to connect jacks, push-buttons, and LEDs.

pin Connection
1 Signal (tip)
2 Ground (sleeve)
  • Female cable mount: AMP 6404412 (Mouser: 571-3-640441-2)
  • Male PCB mount: AMP 6404562 (Mouser: 571-6404562)

3-pin MTA-100 connectors are used for switches and pots.[7]

pin Connection
1 CCW side
2 Wiper
3 CW side

CCW means the low (Counter Clockwise) terminal and CW the high terminal.

  • Female cable mount: AMP 6404413 (Mouser: 571-3-640441-3)
  • Male PCB mount: AMP 6404563 (Mouser: 571-6404563)

See also

References

This page uses Creative Commons Licensed content from Mod Wiggler Wiki:MU DIY resources (View authors).

  1. ^ Technical Information, Synthesizers.com
  2. ^ Mod Wiggler forum:On cheap parts...
  3. ^ a b Guitar Fool:Hardware
  4. ^ Molex Connectors Explained, as used in Pinball.
  5. ^ Internal DC Module Power – 6 pin MTA
  6. ^ Power distribution – updated, Mod Wiggler forum, Sep 2008
  7. ^ Internal Pot/Switch – 3 pin MTA, Synthesizers.com

External links

Schematics, PCB overlays, BOMs and assembly instructions

Lists of preferred parts

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