In einer eMail vom 10.05.03 19:45:18 (MEZ) - Mitteleurop. Sommerzeit schreibt
pe2six@xs4all.nl:
> One other question on the 4-250B or qb3.5/750 in GG configuration.
> When using aprox. 2.7 Kv I'm building an amp with two of those tubes
> parallel. Now i'm looking for the value of the bias zener to get them to
> run in class AB.
>
Hi Erwin,
With 2,7KV there will be no need for Zeners in high? configuration,
idling current will be quite low (class B).
If used as tetrodes you are better off with adjustable grid -voltages
73
Peter
|