Arrow.com has 9000 pieces 2N5401 in stock. Their qty=10 price is USD 0.0759 per piece. Why not buy a lifetime supply of 300 pieces for USD 14.64? That is enough parts to build four copies of every single amplifier design in Bob Cordell's book.
https://www.arrow.com/en/products/2...r&utm_content=inv_listing&utm_source=octopart
How did I find them? I used octopart.com , it's a free website that anybody can use.
https://www.arrow.com/en/products/2...r&utm_content=inv_listing&utm_source=octopart
How did I find them? I used octopart.com , it's a free website that anybody can use.
It's scary to see a work-horse like this go the way of obsolescence. Will the 2N3904 be next??
Cheers,
Bob
Good for Central supporting the older parts, I have not used their 2n5551/5401 parts, but have a Central 2N5109 in the HP11715A FM test set. That was mfg in the early 2000's by Agilent. I trust this mfg. but ... testing is the answer.
For input stages I use ksa992 and ksc1845, current and Pd are very low
for vas & vas 1st buffer in a triple, you can use ksa1381 and ksc3503.
Go publisher go
, lets see if they can keep it under $100
For input stages I use ksa992 and ksc1845, current and Pd are very low
for vas & vas 1st buffer in a triple, you can use ksa1381 and ksc3503.
Go publisher go
, lets see if they can keep it under $100
Fear not , they are not going obsolete. Just moving to SMD.
https://www.taitroncomponents.com/catalog/Datasheet/MMBT5401.pdf
PS- through-hole DIYA is just about "through". But , matchbook sized amp fronts ends are nice,too.
os
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Those parts are still active, but are now known as KSA1381 and KSC3503.
OK, so strictly speaking the "C" parts are not available any more. There's only "E" for the PNP part and "D" for the NPN.
I'll bet that "2SC3503C" appears on an LTSPICE schematic somewhere, and that's why people think it's a part number.
But in fact it simply denotes that the transistor .MODEL parameter values came from Bob Cordell's website. Bob puts a "C" on the end of the part number, to remind users where the simulation parameter values came from. See image below.
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But in fact it simply denotes that the transistor .MODEL parameter values came from Bob Cordell's website. Bob puts a "C" on the end of the part number, to remind users where the simulation parameter values came from. See image below.
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Attachments
It used to be a valid part number. The final letter denotes the beta range. "C" was the lowest grade with beta in the range 40 - 80.
Thanks for mentioning that, Mark. I apologize for any confusion that caused, but I actually did that to remind ME of what model it was
. Its also true, of course, that if those simulations are run with any old manufacturer's model that the results might not be the same.Cheers,
Bob
FZT857/957
300v / 23pf Cob / 85mhz /7w
I love 3503/1381 , but no more CRT's - industry has little use for them. https://www.mouser.com/datasheet/2/115/FZT957-464961.pdf
A little slower , but works well. Lower voltage-180v https://www.mouser.com/datasheet/2/308/EN2262-D-310459.pdf
Faster for 50v rail VAS's. <5 Cob /120mhz
OS
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deleted jan's post containing another persons email, please do not post email addresses....
Apologies. Won't happen again.
Jan