From Bob Erickson, January 30, 2005
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OCRed and HTMLized by Ed Thelen

TRANSISTOR REPLACEMENT
BOB HUNTER
NATICK

- for some faster PNP types, see April 2006 e-mail from Ron Crane
- current substitution for IBM AN diodes
*Note: Refer to IBM Pocket Reference Manual [ 4 megabyytes ] for other type transistors and part numbers not shown here.

IBM TYPE IBM P/N COMMERCIAL EQUIVELENT
003   2N64
004   2N113
008   2N113
013 344892 2N1303, 2N1309
014 345763 2N1303, 2N1309
015 526797 2N380, 2N502A, 2N247, 2N384, 2N500
016 526880 2N380
017   2N380
018 347592 2N380
019 389000 2N380.
020   2N1303, 2N1309
021 526796 2N1303, 2N1309
022 526898 2N174, PG-5
023   2N1038
025 318322 2N1303, 2N309, 2N1381
026 535441 2N270, 2N324, 2N404, 2N526, R212XC
028 610371 2N1038, 2N1039, 2N1040, 2N1041, 2N1042, 2N1043
029 492451 2N527, R212XC
030 369099 2N224, R212
032 369100 2N705, 2N2894*, GL-77
033 318324 2N1303, 2N1309, 1-D, 2N274, 2N503, 2N368
034 535009 2N1303, 2N1309, 1-D
035 492452 2N1303, 2N1309, 1-D
036 207363 2N456, 2N1159, PG-14, 2N1383
037 208196 2N173, 2N441, 2N442, PG-5
038 208197 2N379, 2N1412, PG-5, 2N378
039   2N705, 2N2894*, 2N706
042 369108 2N242, 2N379, 2N669, PG-20, 2N243, 2N257, 2N268, 2N301, 2N392, 2N1168
043   2N705, 2N2894*
044 369119 2N43, 2N44, 2N464, 2N465, 2N467, 2N1008B, 2N1191, 2N1193, 2N241A
046 369109 2N1303, 2N217
047 369113 2N2904, 2N1132, T3517
049 209001 2N277, PG-5
050 369205 2N553, PG-14
063 344891 2N377, 2N1302
071 492450 2N377, 2N647, 2N1302
075 318323 2N377, 2N647, 2N1302
083 318325 2N388, 2N1302
084 369390 2N1893, T4200
085   2N1302
086 369087 2N214, 2N557 - not 2N228, not 2N188, corrected by Bob Feretish
  369654 2N1302, 2N1304
087 369123 2N228
088   2N228, 2N1304 .
089 369559 2N228
090   2N228
091 369561 2N214, 2N228, 2N557, 2N1302
092 369562 2N228
093 369560 2N228
094 369081 2N228
095 369205 2N228
096 369110 2N1302
097 369114 SL-100, T3111
098 369126 1341, 3013, 2N708
099 369213 2N1302
100 369134 T4200, SL-2, 2N1893, 2N1613
101 369177 2N705, 2N2894*, GL-77
102 369179 2N705, 2N2894*, GL-77
103 369180 2N705, 2N2894*, GL-77
104 369182 2N705, 2N2894*, GL-77
105 369183 2N705, 2N2894*, GL-77
106 369194. 2N705, 2N2894*, GL-77
107 369195 2N705, 2N2894*, GL-77
108 369214 2N155, 2N256, 2N307A, PG-5
112   2N705, 2N2894*
113 477282 PG-20
114 369608 2N1303, 2N1309
116   2N1309
117   2N1303
118 369204 2N527, 2N1038, 2N1039, 2N1040, 2N1041, 2N1042, 2N1043, 2N1044, 2N1045, 2N307
119 369616 PG-20, 2N155, 2N256, 2N307, 2N1309
120 369628 2N247, 2N380, 2N1515, 2N1517
121   2N1309
122 369641 2N2411, SL-35
123 369648 2N2552, 2N2553, 2N2554, 2N2555, 2N2556, 2N2557, 2N2558
124 369656 2N705, 2N2894*, GL-77
125 483012 1-D, 2N1303, 2N1309
127 369659 2N1303, 2N1309
128 369662 2N1142, 2N705, 2N2894*
129 369664 2N1309
130 369667 PG-20, 2N456, 2N1159
131 369682 3517, SL-33, 20904, 2N2696
132 2414801-1766936 PG-7
133 2414803 PG-20
134 2414806-2703799 2N1038, 2N1039, 2N1040, 2N1041, 2N1042, 2N1043, 2N1044, 2N1045
135 2414848 2N705, 2N2894*, GL-77
136 2414877 FT0019, 2N3251
138 2414918 2N2696, 3517, 2904
139 2414938 2N2411, SL-35
141 2414947 FT0019, 2N2411, 2N3251
142   2N2904
143 2414971 FT0019
150 2391139 2N2904
151 369215 2N955
152 369587 2N955
153 369588 2N955
154 369589 2N955
155   2N955
156   2N955
157   2N955
158   2N955
159   2N955
160 369669 2N955
161 369683 2N955
162   2N955
164   2N955
165   2N955
167 369597 2N388, 2N302
168 369602 42C6, 2N2193, 2N2863
169 369605 1341
170 369609 2N377, 2N647, 2N1302
171 369618 4205, SL-14, 2N1613
173 369624 4200, SL-14, 2N1893, 2N1613
174 369625 1343, SL-23
175 369632 5B, 2N989, 2N2418, 2N2419, 2N999
178 369686 T4206, SL-98, 2N3252, 2N2863
179 369687 74206, PC-80, SL-08, 2N2863, 2N3252
180 369688 SL-98, 2N3252, 2N2863
181 369689 SL-5, 2N3252, 2N2863
182 369690 0110, SL-14, 2N3252, 2N2863
183 369691 T4206, SL-14, 2N3252, 2N2863
184 369692 SL98, 3252, 2N2863
185 369693 2N2863, 2N862
186 369694 SL-2, 2N2537
187 369695 SL-5, 2N2537
188 369696 0018, SL-14, 2N3252, 2N2863
189 2414972 H84
190 369697 SL-14, 2N3252, 2N2863
192 2414804 2N1302
193 2414811 2N3011
194 2414818 SL-1, FT1312, 2N774
201 2391132 3517
203 2391160 1303
204 2391201 PG-5
205 2391208. T3517, 2N2904
206 2391237 T1713, 2N2894
207 2391240 T1713, 2N3829.
208 2391243 2N3304
209 2391246 GL-77, 2N964
216 2391328 GL-77, 2N705, 2N2894*'
219 2391733 PG-7
251 2414849 2N2484
252 2414863 SM3298
253   2N774
254 2414878 2N1893, 2N1613
255 2414879 SL-23, 2N706
256 2414880 2N2639
257 2414892 PL-28, H-85
258 2414900 3N74
259 2414921 SL-5, 2537, 2N2848
260 2414922 SL-4, T4206, 2N2863
261 2414923 4205
263 2414944 PL-14
265 2414950- 2N744
266 2414952 H-84
267 2390102 SL-97, 2N3252, 2N2537
268 2390103 SL-97, 0125, 2N3252
269 2390101 SL-97, 2N3252, 2N2537
270 2390104 SL-97, 2N2537, 2N3252
272 2414974 2N2484
273 2414977 0018, SL-2, 2N2863
274 2391015 SL-26
275 2391019 PL-28
278 2391057 1302
279 2391059 PL-14, H-84
283 2391114 H-86, 2N3418
284 2391117 T4206, PC-80, SL-98, 2N3252
285 2391118 T0018
286 2391131 FT0018
288 2301145 2N930
289 2391155 2N3011
290 2391156 T0062, 2N3013
291 2391170 SL-98, PC-80
292 2391171 H-84, PL-82, 2N3418
293 2391184 2N3252, 0125, SL-97
294 2391207 2N3252
295 2391224 2N2639, 10-H
296 2391236 T0059, 2N3303
297 2391238 T0016, 2N3011
298 2391241 T0062, 2N3013
299 2391242 T1211, 2N918
300 2391245 1211, 2N918
351 2391272 2N918
353 2391313 2N2243
354 2391319 2N3252, 4206
355 231329 SL-1, FT1312
357 2391345 PL-64, 2N3771
358 2391346 PL-64, H-98, 2N3771
359 2391347 SL-87
361 2391367 PL-14
363 2391666 0125, 2N3252
364 2391667 PL-64, 2N3772
365 2391723 SL-87
366 2391766 FT0047, SL-97, 2N3252
367 2391806 SL-87

DIODES
F1 2391164 U112
F2 2391312 U112
F3 2208532 2N3608
F4 2186859 FN3668
F5 2262489 2N4340
D1 30 AMP 150V 127324
  10 AMP 100V 598353
  10 AMP 200V 216197
  25 AMP 400V 5261455
  12 AMP 400V 5312673

THYRATRON TRANSISTORS FOR INDICATORS ON 2540 - P/N 813228

*Note: Refer to IBM Pocket Reference Manual [ 4 megabyytes ] for other type transistors and part numbers not shown here.

===========================================================

for some faster PNP types

CraneTransistorSubE-Mail April 2006 e-mail - from Ron Crane 


Subject: Re: 1401 TAU debug status & 2N2894 
Date: Wed, 12 Apr 2006 ... 
From: Ron Crane     rccrane at pacbell dot net
To: [ those involved ]

The IBM 102 and IBM 117 transistors are fast PNP germanium switching transistorsin
a TO-18 package. The cross reference for them on the SMS cross reference sheet is 
a 2N705 with a Vceo of 15 V.

Because the 2N705 was not available, we tried the 2N1303, which worked, but
is much slower, 800 nS (2N1303) vs. 100 nS for the IBM 102 and 2N2894 in the logic 
gate circuit. In the flip-flop circuit it works for set and reset, but fails completely
on clock input because the delay is much longer than the RC time constant of the AC 
coupled clock input circuit. The 2N1303 got used because it passed the "try it 
and see if it works" test done by me, not because any of the characterization or 
measurement described in this message was done at that time.

In the flip-flops, the emitter is tied to ground and the collector tied to - 12 V through
a 1.5K resistor and clamped to -6 V with a diode giving a maximum measured 
collector-emitter voltage of about 6.7 V. If the diode gives out, or the -6V supply goes
open circuit (inserting a card with power on), there is a maximum of 12 V through a 
1.5K resistor to collector.

In the gate circuit, the collector is tied to -6V through a 560 ohm resistor. 

In all cases, the 12 V rating on the 2N2894 transistor is adequate. The actual breakdown
on the 2N2894 units purchased is higher. The lowest was 14.5V with most of them 
above 18 V.

I believe we should remove the remaining 9 or 10 2N1303's from the 102 positions and 
replace them with 2N2894's. This will avoid problems in the future if the cards get 
swapped to a location where the original design speed is needed.

- Ron

==========================================================

e-mail from Van Snyder to Ed Thelen - Dec 20, 2009

[the above chart] lists transistor substitutions and some diode substitutions.

It doesn't list a substitution for IBM diode type AN. What is it?

Van

e-mail from Jim Hunt to group

I have replaced a few AN diodes with what we have on hand, and I have noticed that the forward resistance of an old AN diode is about 35-40 ohm, while the new ones are 5-10 ohm, but the good news is that it still works, those resistances are so small comapred to the bias resistors that it doesn't matter.

I do wish we had some proper AN substitures though.