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Nisbeth  
#1 Posted : Monday, May 20, 2013 8:59:17 PM(UTC)
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Apologies if I have missed this elsewhere, but the FJPF-transistors are listed as "obsolete" with both digikey and mouser, so are there any "official" substitutes?.


/U.
Brian Donegan  
#2 Posted : Tuesday, May 21, 2013 1:30:52 PM(UTC)
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I still have a bunch of the FJPFs, but will likely switch to the MJE15034/35 when supplies run out.

They are not insulated, so will also require a silpad and isolating washer.
Nisbeth  
#3 Posted : Wednesday, May 22, 2013 4:27:50 PM(UTC)
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Ok, thanks. If the MJE15030/31 works as well (I expect so) there is actually an MJF-version of those that is fully isolated :)

/U.
picovolt  
#4 Posted : Wednesday, May 22, 2013 5:10:23 PM(UTC)
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Originally Posted by: Brian Donegan Go to Quoted Post
I still have a bunch of the FJPFs, but will likely switch to the MJE15034/35 when supplies run out.

The 34s are also out of stock at Mouser and Digikey. They were expecting to ship last Friday, but I just got a notice that they are unsure of when the factory will be shipping them. My build has been ready for a month, waiting for these, so I'm bummed... From reading forums it seems that getting the hfe above 80 is a major factor. Are there other pairs that you know will be good replacements?

Edited by user Friday, May 24, 2013 5:27:33 PM(UTC)  | Reason: Not specified

Brian Donegan  
#5 Posted : Wednesday, May 22, 2013 5:27:43 PM(UTC)
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Originally Posted by: Nisbeth Go to Quoted Post
Ok, thanks. If the MJE15030/31 works as well (I expect so) there is actually an MJF-version of those that is fully isolated :)

/U.


You want the higher hFE of the 34/35.
nidirex  
#6 Posted : Sunday, June 2, 2013 8:46:53 AM(UTC)
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Originally Posted by: Brian Donegan Go to Quoted Post


You want the higher hFE of the 34/35.


There is a substitute available in Mouser or Digitex catalog that I can purchase now? MJE15035G will be available in 20weeks... I have buy one pcb of Placid BP that is incomplete of transistors.

Thank you.
picovolt  
#7 Posted : Sunday, June 2, 2013 7:09:07 PM(UTC)
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The 35 is available now at Mouser

http://www.mouser.com/Se...ne.aspx?Keyword=mje15035

the 34 is currently expected September 23. My whole set up is built and just waiting those two transistors...
jazzbear  
#8 Posted : Thursday, August 29, 2013 10:47:49 AM(UTC)
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Hello Brian!

Please help! if this is true replacement for 1N5314 - Vishay J511

Thanks in advance
/N
Brian Donegan  
#9 Posted : Thursday, August 29, 2013 12:42:16 PM(UTC)
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Originally Posted by: jazzbear Go to Quoted Post
Hello Brian!

Please help! if this is true replacement for 1N5314 - Vishay J511

Thanks in advance
/N


Yes, those should work, if you can find them.
jazzbear  
#10 Posted : Thursday, August 29, 2013 1:33:58 PM(UTC)
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Thanks a lot Brian!
My friend has several pieces, and I go to work on PS for B III.

\N
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