6X4: 6X4W, 6X4WA, 6202, EZ90, CV4005,
not supply Western Electric
tubes with the LP2 because they
are very expensive (each tube can run
US $40 to $80) and are not
ready available. Our
choice to supply 5842 tube with
the LP2 was originally made
because it is an industrial
version of the WE tube, and
their parameters are identical.
The WE tubes can be purchased
through tube suppliers; we
have only a few pieces in stock
for reference purposes.
The issue with the WE and 5842 is
that there is a certain percentage
of them that exhibit
microphonic effect and other
unacceptable behavior in audio application.
Therefore, we purchase large
quantities of 5842 tubes and test each
tube to make sure it is quiet; the
rest are discarded. If we
were to supply the LP2 with a
set of WE tubes, we would need to
have at least 10 tubes on
hand in order to make a selection
of 4 that are acceptable.
This would be expensive --
between $400-$800 just to select
one set of tubes.
If some of our customers want to
use original WE 417A tubes, they
buy them personally through the
internet or tube suppliers, and
then experiment with the