Max cap size for a 5Y3GT

[adamasd]

I have looked in every data sheet I can find, and I can not find how much capacitance I can put for the first filter stage and get decent tube life.

Are there any rules of thumb for this, I have noticed quite a few rectifier data sheets ignore this info.

adam

 

[PRR]

5Y3
10uFd:
http://www.mif.pg.gda.pl/homepages/frank/sheets/127/5/5Y3GA.pdf
20uFd:
http://www.mif.pg.gda.pl/homepages/frank/sheets/127/5/5Y3GT.pdf
20uFd:
http://www.mif.pg.gda.pl/homepages/frank/sheets/093/5/5Y3GT.pdf
5Y4 is the same except the base.
10uFd:
http://www.mif.pg.gda.pl/homepages/frank/sheets/049/5/5Y4GA.pdf

 

[adamasd]

Ok, so the typical operating condition is the max. Back to work then.

thanks,
adam

 

[PRR]

I'm wrong. The rating is 2.2 Amps peak plate current. You can figure this with Duncan Power Supply Designer.

 

[caps]

How does a capacitor effect the life of a tube diode?

 

[CJ]

if the cap is too big, you can arc weld the plates of the 5y3.
never done it, hoping every day to see it in person.

semiconductor stuff is so boring when it pops.
but tubes, you usually get your money's worth.


they have charts and graphs for filter selection, but mostly for people who wanna know how cheap they can go.

Putting resistance between rectifier and first cap is ugly math.

here is a cool article:

http://www.audioxpress.com/resource/audioclass/ga499ac.pdf