part subs

ineedahobby · 10th April 2009, 04:32 PM

i would like to know if there is a suitable sub for mica caps in audio ckts. the ones i want to replace are through-hole precision and i want to use smd caps. the ones i want to replace don't come in smd versions. if anyone can tell me a good cross reference web site that might help to. I am looking for smd versions of bc414b and bc414c transistors or equivalent. of course i could always just bendthe leads but that would be cheating.

mjf · 10th April 2009, 08:23 PM

hello.
perhaps have a look at this:
bc414 b/c are similar to bc550b/c and the smd version is bc850 i think
greetings...........

satoru · 10th April 2009, 08:40 PM

Did you check the Cornell Dubilier's site?

http://www.cde.com/catalog/mica/#chip

If the precision (or tempco) is the problem, either you can hand select SMD mica chips, or use NP0.

If my data sheet is correct, BC414C is an NPN low noise Tr with Vcbo 45V, 100mA, 300mW, Cob 3.7 pF, Ft 200Mhz max, Hfe range 220-800 and NF 2.0 dB max...
How about 2SC2713, SMD version of 2SC2240? I'm curious for other possible SMD replacement for BC415C.

Good luck!

satoru · 11th April 2009, 01:32 AM

Sorry, BC414C, not BC415C...

Quote:

I'm curious for other possible SMD replacement for BC415C.

10th April 2009, 04:32 PM	#1
ineedahobby diyAudio Member Join Date: Oct 2007	part subs i would like to know if there is a suitable sub for mica caps in audio ckts. the ones i want to replace are through-hole precision and i want to use smd caps. the ones i want to replace don't come in smd versions. if anyone can tell me a good cross reference web site that might help to. I am looking for smd versions of bc414b and bc414c transistors or equivalent. of course i could always just bendthe leads but that would be cheating.

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10th April 2009, 08:23 PM	#2
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. perhaps have a look at this: bc414 b/c are similar to bc550b/c and the smd version is bc850 i think greetings...........

10th April 2009, 08:40 PM	#3
satoru diyAudio Member Join Date: Jan 2007 Location: Berkeley, California	Did you check the Cornell Dubilier's site? http://www.cde.com/catalog/mica/#chip If the precision (or tempco) is the problem, either you can hand select SMD mica chips, or use NP0. If my data sheet is correct, BC414C is an NPN low noise Tr with Vcbo 45V, 100mA, 300mW, Cob 3.7 pF, Ft 200Mhz max, Hfe range 220-800 and NF 2.0 dB max... How about 2SC2713, SMD version of 2SC2240? I'm curious for other possible SMD replacement for BC415C. Good luck!

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