Owner manual

REPLACEMENT OF LOW LEVEL TUBES

We strongly recommend that you use only tubes specifically selected and tested by VAC

for this application.

Before replacing tubes, all power must be turned off and all cables disconnected. Allow

15 minutes for the tubes to cool down before removing the top cover.

Install new tubes of the appropriate types firmly in their sockets, noting the location of holes

in the socket and pins of the tubes, taking care to make sure that pin pattern corresponds

to holes in tube socket. Replace the cover and secure it will all of the screws before

connecting and/or operating the preamplifier.

In the event that trouble is encountered, check all signal, speaker and power connections.

If the problem persists, follow all safety precautions stated earlier in this section, and check

that all tubes are correctly seated in their sockets. If possible, try another tube. If the

problem persists, please consult your VAC dealer or contact the factory directly.

Tubes are like the tires on a car; they will eventually need replacement. Murphy's Law states

that a tube will probably fail right at the start of a long holiday weekend. Therefore, many

audiophiles keep a spare tube of each type on hand, just in case!

VAC can test tubes for concerned customers.

V1 = 12AX7 low noise*

V2 = 12AX7 low noise*

V3 = 12AX7

V4 = 12AU7

V5 = 12AX7

V6 = 12AX7

* low noise not

necessarily required,

but helpful with

low output phono

cartridges