Peter Wieck wrote:
On Dec 2, 8:51 am, Ian Thompson-Bell wrote:
I have being playing around with plate characteristics graphs, looking
at how basic parameters (gm,rp and mu) vary with operating point. The
most frustrating thing about this is that the published curves all
extend to rather large plate currents and voltages. For my preamp I am
working at plate currents of less than 5mA and the curves here are
rather cramped. Is there any source of curves that are expanded for the
lower plate current region?

Cheers

Ian

Don't know if this does you any good:

http://hereford.ampr.org/Tube4.php?tube=6au6

But it is a start.


If nothing else, Peter, it shows someone has created a graph at lower
plate currents - pity it is for pentode connection as I am using triode
connection.

Cheers

ian