CAV45
Owner’s Manual
6
acuum Tube Replacement
The
CAV45
uses seven vacuum tubes of three different types: one
type 6922 (V1), two type 5965 (V2 and V3), and four type EL34
(V4 through V7). The brands of tubes we supply have been chosen
by first selecting those brands which are known to be most reliable,
then by extensive auditioning of these acceptable brands with the
final choices being made solely on the basis of sonic performance.
We know of no vacuum tubes available which will improve the
sonic performance of your
CAV45
. We highly recommend that you
purchase replacement tube sets from conrad-johnson design.
We anticipate tube life to accommodate two to three years of
operation without degradation in normal use - if the amplifier is
switched off when not in use. If it is left on at all times, tube life can
be exhausted in a matter of a few months.
The
CAV45
has been designed to make tube replacement as
simple as possible. Because the output tubes are individually
biased, replacement tubes need not be matched pairs. No a-c
balance adjustment is necessary. It is necessary to re-bias the
amplifier when the output tubes are replaced. The
CAV45
has built
in bias indicators so that no instruments are required to make this
adjustment.
V
