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of metal then holds the assembly together and compresses the contact sheet with a foam spacer. Earlier Model F keyboards cannot have their space bars removed without disassembling the internal assembly; this also causes a slightly different feel response from the space bar specifically: some enthusiasts modify the tension of the stabilizer on these early Model F keyboards to provide a more satisfactory response.
179:
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The Model F's key-switch design was more durable than IBM's previous beam-spring mechanism, which was prone to failure from debris and was more complex to manufacture and service. The spring assembly consisted of a top metal plate with cut holes where the plastic spring barrels reside; a bottom sheet
317:
Since 2016 a project has been underway to manufacture for sale keyboards with a faithful re-creation of the model F mechanism, completely independently of IBM. The New Model F has two variants which both resemble the 4704, but with default layouts tweaked in the direction of a Model M (notably using
350:
A characteristic feature of the Model F is a plastic top shell painted with a cream paint to create a rough texture. The later Model M keyboards used injection plastic rather than paint to achieve this texture. The plastic used in the Model F is quite brittle and prone to hairline cracks, and the
346:
The top metal plates in Model F keyboards are prone to corrosion and the internal foam can also rot from age, which often requires cleaning and a coating to prevent further corrosion. All Model F internal assemblies are held together with metal tabs, unlike the Model M which uses melted plastic
314:
also prizes Model Fs and restores them for use with modern systems, though fewer are still in use due to lower production volume and a layout that is somewhat awkward and limited by modern standards.
318:
an inverted-T arrow-key cluster rather than the old-fashioned cross layout of the original Model Fs). This project has attracted over 25,000 subscribers and began shipping in
December 2019.
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363:
A comparison between a Model F spring (left) and a Model M spring (right); the Model M uses a spring with fewer windings and smaller plate for the plastic membrane underneath.
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80:
The capacitive design is widely considered superior to that of the later membrane design used on the Model M. It has a lighter actuation force of about 600
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Terminal keyboard originally released for the IBM PC 3270. Later used with some IBM terminal equipment. Uses an IBM proprietary terminal connector.
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Although the Model F and Model M are both based on buckling-spring technology, there are considerable differences between them:
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Many IBM keyboards were based on Model F technology, featuring different keycaps, layouts and connections:
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87-key keyboard released for the IBM 3178, so named because of the blue toggle switch on the top half.
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95:. These advantages were sacrificed in the Model M in order to lower manufacturing costs.
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in 1981 with some keycap label differences, and its subsequent release with the
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725:"Model F improvement: (Dis)assembly tips and Space bar mod - deskthority"
43:
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Corrosion occurring on a Model F 122 terminal keyboard along with dust
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rivets requiring more rivets to be melted on or modified with bolts.
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back panel (plastic in the F AT and zinc metal in the 4704 series)
38:
produced mainly from 1981–1985 and in reduced volume until 1994 by
2004:
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Released in 1981 with the original IBM PC. Uses an XT connector.
81:
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Painted plastic (zinc metal in the 4704 series) and steel metal
832:
39:
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Released in 1984 with the IBM PC AT. Uses an AT connector.
100:
87:, a crisper feel, and louder feedback. It also has a higher
739:"Modifications:IBM Model M:Nut and Bolt Mod - GeekHackWiki"
228:
Terminal keyboard released for the IBM 5085 and IBM 3290.
619:
606:"IBM "Blue Switch" 3178-C3 Terminal - Deskthority wiki"
297:, these Model F keyboards featured fully white keys.
65:
all-in-one computer. It is best known as part of the
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798:– Interoperability problems with modern hardware.
393:Molded (unpainted) plastic, plastic back panel
330:Model F capacitive pads from an opened assembly
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8:
457:Single plastic mold with predefined barrels
267:107-key keyboard released for the IBM 4704
46:. Its mechanical-key design consisted of a
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254:62-key keyboard released for the IBM 4704
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58:that used a membrane in place of the PCB.
91:of over 100 million keypresses, and full
369:
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333:
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280:50-key keypad released for the IBM 4704
150:
670:"Model F keyboard gets a modern reboot"
564:"Model F keyboard gets a modern reboot"
500:
454:Individually inserted in a metal plane
351:paint can wear off from excessive use.
2056:Computer-related introductions in 1981
133:
126:The sound of an IBM Model F from 1984.
7:
620:"IBM 4704 Keyboards | kishy.ca"
536:Bradley, David J. (September 1990).
310:The enthusiast community around the
222:Model F '104-key terminal keyboard'
204:Model F '122-key terminal keyboard'
61:The Model F first appeared with the
1881:ThinkPad 240 with Transmeta Crusoe
306:Enthusiasts and modern re-creation
235:Model F '3178 blue switch 87-key'
25:
853:PC business acquisition by Lenovo
1917:Professional Graphics Controller
711:"Beam spring - Deskthority wiki"
649:"The Best Keyboard Ever Is Back"
634:"IBM Model F - Deskthority wiki"
592:"IBM Model F - Deskthority wiki"
578:"IBM Model F - Deskthority wiki"
523:"IBM Model F - Deskthority wiki"
509:"IBM Model F - Deskthority wiki"
134:Problems playing this file? See
116:
775:– current Model F manufacturer.
1968:Industry Standard Architecture
409:Buckling spring implementation
1:
792:The Compleat Classic Keyboard
691:"Brand New Model F Keyboards"
753:"Nkro - MechanicalKeyboards"
668:Killian, Zak (6 July 2017).
538:"The Creation of the IBM PC"
490:List of mechanical keyboards
27:Series of computer keyboards
647:Limer, Eric (5 July 2017).
2072:
1922:Multi-Color Graphics Array
1902:Monochrome Display Adapter
846:Influence on the PC market
444:Single-use plastic rivets
293:Keyboard released for the
1912:Enhanced Graphics Adapter
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402:
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153:
2051:IBM computer peripherals
2041:Computer keyboard models
480:IBM Displaywriter System
295:IBM Displaywriter System
287:Model F 'Displaywriter'
71:IBM Personal Computer/AT
63:IBM System/23 Datamaster
1937:Extended Graphics Array
355:Comparison with Model M
261:Model F '4704 107-key'
54:, similar to the later
1907:Color Graphics Adapter
364:
339:
331:
274:Model F '4704 50-key'
248:Model F '4704 62-key'
189:6450200 (US version)
105:
1207:PS/2 Note and PS/note
403:Only in early models
362:
337:
329:
104:
67:IBM Personal Computer
1927:Video Graphics Array
441:Reusable metal tabs
966:Industrial Computer
399:Internal stabilizer
2000:Music Feature Card
835:personal computers
794:( Eric S. Raymond)
781:Test Your Keyboard
544:. pp. 414–420
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112:IBM Model F (1984)
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50:over a capacitive
36:computer keyboards
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1963:IBM PC compatible
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654:Popular Mechanics
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413:Capacitive plate
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16:(Redirected from
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384:External chassis
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75:Model M keyboard
56:Model M keyboard
34:was a series of
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1843:Palm Top PC 110
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675:The Tech Report
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431:2-key rollover
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976:list of models
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894:list of models
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865:and all-in-one
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566:. 6 July 2017.
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186:Model F 'AT'
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168:Model F 'XT'
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1467:Power Series
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1191:PS/2 Laptop
1180:pre-ThinkPad
793:
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771:Model F Labs
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694:. Retrieved
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546:. Retrieved
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423:Key rollover
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1187:Convertible
1145:Portable PC
1103:ThinkCentre
160:Description
2035:Categories
2020:ThinkLight
1864:Prototypes
1239:PS/55 Note
1078:ValuePoint
884:DataMaster
696:2017-07-08
496:References
428:Unlimited
144:Variations
136:media help
42:and later
1978:Keyboards
1958:IBM BASIC
1810:TransNote
1088:PC Series
2015:UltraBay
1953:IBM 5151
1932:IBM 8514
1886:WatchPad
1871:Leapfrog
1836:Handheld
1746:R series
1668:X series
1622:A series
1554:T series
1526:G series
1254:ThinkPad
1128:Portable
1113:M series
1108:A series
1098:NetVista
1073:EduQuest
464:See also
378:Model M
277:6019273
264:6020218
251:6019284
238:6019284
225:1387033
207:611034x
171:1801449
2010:SurePOS
1988:Model M
1983:Model F
1946:Related
1848:WorkPad
1244:PCradio
1200:CL57 SX
943:3270 AT
911:3270 PC
863:Desktop
785:– Keys.
548:2 April
375:Model F
44:Lexmark
32:Model F
1803:Others
1420:series
1400:series
1360:series
1310:series
1275:series
1227:N51SLC
1195:L40 SX
1171:Laptop
1093:Aptiva
1041:70 486
1036:70 386
1001:30 286
986:25 286
954:Series
938:AT/370
916:XT 286
906:XT/370
322:Design
163:Image
2005:Mwave
1377:555BJ
1372:550BJ
1222:N51SX
1217:N45SL
1212:N33SX
1083:Ambra
1058:PS/55
1031:65 SX
1021:55 LS
1016:55 SX
991:25 SX
933:PC AT
901:PC XT
1736:X61t
1731:X60t
1659:A31p
1656:A30p
1647:A22p
1644:A21p
1641:A20p
1638:A22e
1635:A22m
1632:A21m
1629:A20m
1140:5110
1135:5100
1068:PS/1
1063:PS/V
1011:50 Z
971:PS/2
961:5550
928:PCjr
879:5120
550:2016
542:BYTE
154:Name
89:MTBF
30:The
1853:Z50
1794:R61
1789:R60
1784:R52
1779:R51
1774:R50
1769:R40
1764:R32
1759:R31
1754:R30
1726:X60
1721:X41
1716:X40
1711:X32
1706:X31
1701:X30
1696:X24
1691:X23
1686:X22
1681:X21
1676:X20
1653:A31
1650:A30
1612:T61
1607:T60
1602:T43
1597:T42
1592:T41
1587:T40
1582:T30
1577:T23
1572:T22
1567:T21
1562:T20
1544:G50
1539:G41
1534:G40
1510:860
1505:851
1500:850
1495:823
1490:822
1485:821
1480:820
1475:800
1457:770
1452:765
1447:760
1442:755
1437:750
1427:700
1407:600
1387:570
1382:560
1367:500
1347:390
1342:380
1337:365
1332:360
1327:350
1322:310
1317:300
1297:240
1292:235
1287:230
1282:220
1160:P75
1155:P70
833:IBM
52:PCB
40:IBM
2037::
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1026:60
1006:50
996:30
981:25
923:JX
889:PC
672:.
651:.
540:.
290:?
157:PN
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1051:E
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85:N
82:m
20:)
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