Marquardt Series 6184
Series 6184 is a series of keyboard switches from Marquardt. Marquardt reported that the series was introduced in 1987, and discontinued in 2000 after a change of focus at Marquardt and competition from the Far East.
The 4 mm travel momentary linear design is well-known, while the alternate action and 2.5 mm travel types are not known to have been discovered.
The contact assembly is the same patented design as found in the previously-introduced Series 6180.
- Momentary and alternate action
- Corner illumination using a choice of red, green or yellow LED
- Internal diode for N-key rollover (non-illuminated momentary types)
- Linear and tactile feel
- Cherry MX keycap compatibility
Marquardt provided drawings for models 6184.0101 (linear momentary with 4 mm travel) and 6184.1204 (linear momentary illuminated with 2.5 mm travel), which can be found under Documentation below. The specifications below are derived solely from these documents, and may not represent the complete product range. These are the same specifications as for Series 6180.
|Switching voltage||28 V maximum|
|Switching current||50 mA maximum|
|Pretravel||1.5±0.5 mm||2.0±0.5 mm|
|Total travel||2.5±0.3 mm||4.0±0.3 mm|
|Operating force (linear)||67.5±17.5 cN||55±15 cN|
The table of models below is taken from an advertisment in Electronic Engineers Master 1989–90 Volume 2, which can be found under Documentation below.
For now, it is assumed that the “tactile” type is the click-tactile type that has now been obtained surplus NOS, without any identification.
The tactile types are externally identical to the linear types. Internally, there is a plastic frame containing two prongs, with knobs at the end. A pair of wedges on the reverse side of the plunger force these prongs apart, which snap back with a loud and sharp click sound. The tactile sensation is strong and sharp.
The images below depict what is assumed to be model 6184.0701: tactile, 4 mm travel, no LED or diode.
These switches even more so than the linear types are best reassembled upside down, by placing the contact assembly, plunger and spring (and in the case of these, the click frame) into the lid, and then placing the base over the top. The actuator leaf must be placed onto the contact module as depicted above, before the two are inserted into the lid together.
- Marquardt Model 7065, known as the “Marquardt Mini”
- Marquardt Mini-Ergo (reported to be Model 7053, which fits both the model number scheme and the FCC ID)