2N1227 Equivalent?

[BluegrassDan]

Hey guys,

Working on my 1967 Chrysler Newport radio. It uses two 2N1227a Germanium transistors (TO-3 package).

Any thoughts on a modern replacement?

INFO:

Type Designator: 2N1227

Material of Transistor: Ge

Polarity: PNP

Maximum Collector Power Dissipation (Pc): 50 W

Maximum Collector-Base Voltage |Vcb|: 35 V

Maximum Collector-Emitter Voltage |Vce|: 30 V

Maximum Emitter-Base Voltage |Veb|: 15 V

Maximum Collector Current |Ic max|: 3 A

Max. Operating Junction Temperature (Tj): 95 °C

Transition Frequency (ft): 0.1 MHz

Forward Current Transfer Ratio (hFE), MIN: 50

Noise Figure, dB: -

Package: TO3

 

[Whoops]

No "modern" replacements as Germanium transistors are not produced for a long time, and you can't replace them for Silicon without altering the circuit around them.

These are the cross-references I can find:

AD149,
AUY19
AUY20
2N2144
2N2145
2N2146
ADY24
2N1536
GT701A
2N2144

And probably any of these:

2N1032
2N1146
2N1147
2N1227
2N1360
2N1363
2N1365
2N1540
2N1541
2N1542
2N1543
2N1545
2N1546
2N1547
2N1548
2N1558
2N1559
2N1560
2N2143
2N2145
2N2146
2N2155
2N2159
2N290
2N3124
2N3315
2N3316
2N3614
2N375
2N392
2N4048
2N4049
2N4050
2N4051
2N4052
2N4053
2N4245
2N4246
2N4247
2N4278
2N4279
2N4280
2N4281
2N4282
2N4283
2N678A
ADY30

 

[Whoops]

I have a nice stock of TO-3 Germanium transistors, do you want me to check out if I have any of the list?
I would gladly send it to you for free as I have much more germanium transistors than I will ever use in my entire life.

Are you sure your two 2N1227 are shot?
How do you know?

 

[BluegrassDan]

I have a nice stock of TO-3 Germanium transistors, do you want me to check out if I have any of the list?
I would gladly send it to you for free as I have much more germanium transistors than I will ever use in my entire life.

Are you sure your two 2N1227 are shot?
How do you know?

Thanks guys for the info. Turns out the transistors are okay. Replacing caps fixed the issue, but I was looking preemptively.