Part source for u87 transistor

[tunes]

I am trying to find a replacement part for the transistor on a an 80's model (diagram 930-21) u87.

Can someone point me in the right direction?

 

[gary o]

http://recordist.com/ampex/schematics/neumann/u87sch.jpg

this and lots more info in the metas......

all the best

 

[MagnetoSound]

The stock FET is 2N3819. Be sure to read up on the various biasing methods.

 

[gary o]

And I hear they not making them anymore.....Farnell UK has some at the moment tho....

 

[jensenmann]

Make sure that you clean everything after replacing the FET. The circuit is very high impedance at that point and fingerprints are 50MOhm resistors 

 

[tunes]

The stock FET is 2N3819. Be sure to read up on the various biasing methods.

Yeah I learned about that while searching for the part. Yet another thing I will need to hunt for some docs on how to do it. Thanks for the heads-up.

 

[tunes]

The stock FET is 2N3819. Be sure to read up on the various biasing methods.

This one is the correct part number per Magneto's post but doesn't look the same. I would like to find an NOS source but for you more seasoned guys would you say it's not likely I would find that?

http://uk.farnell.com/fairchild-semiconductor/2n3819/transistor-jfet-n-to-92/dp/1017644

So I have a question. It seems silly to buy just one.

And I hear they not making them anymore.....Farnell UK has some at the moment tho....

If I am going to do some other Mic projects (DIY) should I buy a couple or even more?

 

[gary o]

Also some on Ebay worth buying a bag......I read here somewhere they have to be selected for DIY KM style circuit ?.....not sure if you would need to select one for your U87....perhaps someone has more infoon this .........