Hi All. I need your help with a replacement for the spec RCA 1B05 or 1B04 output transistors on a Harman Kardon 16 Amp. I fried one (actually an RCA 0404A that I can find no info on). Now it reads .5 ohms and all others read 1 ohm. Would the MJ 15022 or 24 work, and could I change just the one or would i need to change all. Thanks. Specs were:
RCA1B04 Transistor Datasheet. Parameters and Characteristics.
Type Designator: RCA1B04
Material of transistor: Si
Polarity: NPN
Maximum collector power dissipation (Pc), W: 150
Maximum collector-base voltage |Ucb|, V: 225
Maximum collector-emitter voltage |Uce|, V: 200
Maximum emitter-base voltage |Ueb|, V: 5
Maximum collector current |Ic max|, A: 7
Maksimalna temperatura (Tj), °C: 200
Transition frequency (ft), MHz: 5
Collector capacitance (Cc), pF:
Forward current transfer ratio (hFE), min: 15
RCA1B05 Transistor Datasheet. Parameters and Characteristics.
Type Designator: RCA1B05
Material of transistor: Si
Polarity: NPN
Maximum collector power dissipation (Pc), W: 150
Maximum collector-base voltage |Ucb|, V: 275
Maximum collector-emitter voltage |Uce|, V: 250
Maximum emitter-base voltage |Ueb|, V: 5
Maximum collector current |Ic max|, A: 7
Maksimalna temperatura (Tj), °C: 200
Transition frequency (ft), MHz: 5
Collector capacitance (Cc), pF:
Forward current transfer ratio (hFE), min: 15
RCA1B04 Transistor Datasheet. Parameters and Characteristics.
Type Designator: RCA1B04
Material of transistor: Si
Polarity: NPN
Maximum collector power dissipation (Pc), W: 150
Maximum collector-base voltage |Ucb|, V: 225
Maximum collector-emitter voltage |Uce|, V: 200
Maximum emitter-base voltage |Ueb|, V: 5
Maximum collector current |Ic max|, A: 7
Maksimalna temperatura (Tj), °C: 200
Transition frequency (ft), MHz: 5
Collector capacitance (Cc), pF:
Forward current transfer ratio (hFE), min: 15
RCA1B05 Transistor Datasheet. Parameters and Characteristics.
Type Designator: RCA1B05
Material of transistor: Si
Polarity: NPN
Maximum collector power dissipation (Pc), W: 150
Maximum collector-base voltage |Ucb|, V: 275
Maximum collector-emitter voltage |Uce|, V: 250
Maximum emitter-base voltage |Ueb|, V: 5
Maximum collector current |Ic max|, A: 7
Maksimalna temperatura (Tj), °C: 200
Transition frequency (ft), MHz: 5
Collector capacitance (Cc), pF:
Forward current transfer ratio (hFE), min: 15
hi Bill
i would replace all of them with MJ15024 get the genuine ON semi devices.
(that way you will have a few good originals for the other channel spare)
be very care full on power up take measurements of IQ etc.
great info here http://www.diyaudio.com/forums/solid-state/37085-citation-sixteen.html
i would replace all of them with MJ15024 get the genuine ON semi devices.
(that way you will have a few good originals for the other channel spare)
be very care full on power up take measurements of IQ etc.
great info here http://www.diyaudio.com/forums/solid-state/37085-citation-sixteen.html
All fixed up. Thankfully just needed 1 of original replacement transistors and now works great and sounds great! I bought 4 replacements just in case as hard to find. 1b04 is suggested part and 1b05 can be used as alternate. both are hard to find though, so the MJ15024 seems to be what most people replace the spec part with, but usually a full replacement of all like parts. Not that not all of the transistors are the same on the heat sinks so refer to the service manual to make sure you have the proper part. Then triple check it. 🙂
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