In article ,
Dave wrote:
Does anyone have a source or URL or copy of the 6146 characteristic curves?

My main interest is determining the transconductance variations caused by
variations in G2 voltage.

The complete RCA HB-3 manual is online at
http://www.pmillett.com/hb-3_tube_manual.htm

Specifically the charts for the 6146 are at
http://www.pmillett.com/tubedata/HB-...6-B_8298-A.pdf

This is the most wonderful tube reference ever produced, by the way, and
the folks responsible for getting it on the net deserve congratulations.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."