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- Joined
- Feb 9, 2013
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- 424
TIP41C or maybe TIP31C? The characteristics are fairly similar
I guess it depends on the application, since choosing an equivalent transistor usually involves a compromise with its characteristics.
I guess it depends on the application, since choosing an equivalent transistor usually involves a compromise with its characteristics.
Thank you for your help.I have ordered these transistors,though still not sure what i can replace the rca1c04 with as this is PNP transistor.
These are on a Carlsboro Cobra 90 bass amplifier.that i am trying to repair for my son.
regards
Andy
73's de Edd
- Aug 21, 2015
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- Joined
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Sir andomando. . . . . . .
Those RCA numbers made me go back to the '80's and consult some of my design reference books from that time frame.
I am now wondering if your amp unit is made along these manners that RCA used back then.
If so, then your RCA 1C03 and 1C04 would be used as complementary driver transistors to the RCA1B06 output transistors.
INITIALLY RCA made that unit using metal cased transistors, with TO-3 metal cased output transistors and either TO-66 or TO-39 metal cased driver transistors.
Then the economy transition to using plastic transistors . . . .2N5840's for the outputs and 2N6293 and 2N6476 JEDEC series of transistors for the drivers.
FINALLY they digress to using the 1C03 and 1C04 series that you refer to.
The 2N . . .JEDEC . . .series are still available if you just seek them out.
The already suggested . . . . .TIP 31C and TIP41C have their matched PNP complements of TIP 32C and TIP42C, but are a bit WEAK in the hFE spec.
The logical next TIP choice would be the TIP 147T and TIP 142T but their hFE spec, possibly might be too high up in the 500+ range.
The ECG series straddle across the lower 15-150 hFE spec
TECHNO REFERENCING:
(MAG it on up . . . .it gets reeeeel beeeeeeg)
Thasssit . . . .
73's de Edd
.
Sir andomando. . . . . . .
Those RCA numbers made me go back to the '80's and consult some of my design reference books from that time frame.
I am now wondering if your amp unit is made along these manners that RCA used back then.
If so, then your RCA 1C03 and 1C04 would be used as complementary driver transistors to the RCA1B06 output transistors.
INITIALLY RCA made that unit using metal cased transistors, with TO-3 metal cased output transistors and either TO-66 or TO-39 metal cased driver transistors.
Then the economy transition to using plastic transistors . . . .2N5840's for the outputs and 2N6293 and 2N6476 JEDEC series of transistors for the drivers.
FINALLY they digress to using the 1C03 and 1C04 series that you refer to.
The 2N . . .JEDEC . . .series are still available if you just seek them out.
The already suggested . . . . .TIP 31C and TIP41C have their matched PNP complements of TIP 32C and TIP42C, but are a bit WEAK in the hFE spec.
The logical next TIP choice would be the TIP 147T and TIP 142T but their hFE spec, possibly might be too high up in the 500+ range.
The ECG series straddle across the lower 15-150 hFE spec
TECHNO REFERENCING:
(MAG it on up . . . .it gets reeeeel beeeeeeg)
Thasssit . . . .
73's de Edd
.
Last edited:
- Joined
- Feb 9, 2013
- Messages
- 424
These two are perfect! How did you find these dorke?
I have limited experience with selecting transistors so had to look on farnell.
- Joined
- Feb 9, 2013
- Messages
- 424
Ah, I had assumed google had already been probed 
- Joined
- Feb 9, 2013
- Messages
- 424
The R denotes a decimal point, just like a 2.2K Ohm resistor is marked 2K2.
24000000 -> 24M
24000 -> 24k
24 -> 24R
2.4 -> 2R4
0.24 -> R24
So its a 0.24 Ohm resistor 7W
24000000 -> 24M
24000 -> 24k
24 -> 24R
2.4 -> 2R4
0.24 -> R24
So its a 0.24 Ohm resistor 7W
The R denotes a decimal point, just like a 2.2K Ohm resistor is marked 2K2.
24000000 -> 24M
24000 -> 24k
24 -> 24R
2.4 -> 2R4
0.24 -> R24
So its a 0.24 Ohm resistor 7W
Yes,
"R" stands for the decimal point .
