[sdiy] B+ Current consumption

[Michael Ruberto]

>
>Depends on the tube. 12ax7 will need about 2-4mA, 12au7 maybe 10-20mA.
>

I am planning to try a few different tubes just for some experiments but I 
mainly have 12au7. I guess a little extra current capacity wont hurt.


>
>If you need to drop voltage you can use several high power zeners in 
>series.
>

That sounds like a good idea. I have just located another transformer that 
has 150V CT. It is about half the price too.

For the heaters I see some circuits use 12V and others use 6V. I even have 
one where it specifies 4V. Does this voltage requirement vary with the tube 
too?


M. A. Ruberto

_________________________________________________________________
The MSN Entertainment Guide to Golden Globes is here.  Get all the scoop. 
http://tv.msn.com/tv/globes2007/?icid=nctagline2