2)
Seating the Tubes
– It is possible for the tubes to loosen in their
sockets during shipping. Using a glove or a clean dry cloth make
sure that the tubes are fully seated in their sockets as shown in
figure 1. Note the correct location and orientation of the tubes.
LG - Low Gain – use “l” switch setting
MG - Medium Gain – use “h” switch setting
HG - High Gain – use “h” switch setting
The optional all-tube phono section consists of two input tubes
(12AX7), a passive RIAA equalization section, and an output section
that can be configured in one of three gain levels to accommodate
different cartridge output levels. Using 12AU7 tubes in the output
amplification stage (the two tubes nearest the front of the unit)
provides an overall gain of approximately 63dB. This is very
satisfactory for moving magnet and moving coil cartridges with an
output over 1mV. In this configuration the two small switches on the
phono board should be in the “l” setting. An additional 10dB of gain
can be realized by replacing the 12AU7 tubes with 12AT7 tubes. In
this case the switches should be moved to the “h” position. This
configuration is recommended for cartridge outputs of 0.4mV and
MAINTENANCE
The Rogue Ninety-Nine has been designed to provide many years of
enjoyable and reliable service. The greatest care has been taken to
select vacuum tubes that provide superior sound and ensure long life.
In addition, this unit utilizes a slow turn on feature that helps prevent
cathode stripping during power up. This feature will greatly increase
usable tube life.
Replacing Tubes:
1)
Remove the top cover.
2)
Using a glove or cloth, carefully remove the tubes from their
socket.
WARNING: If unit has been powered up, you must
turn off the switch and wait at least one hour before
disconnecting the electrical cord. After doing so, the
unit may be unplugged and the top cover removed.
This time is required for dangerous voltages to
dissipate to ground.
3)
It is recommended that a new set of tubes be obtained from
Rogue Audio. If tubes are obtained from another source, follow
the diagram in figure 1 for tube type.
4)
Insert new tubes in sockets using a glove or cloth. See figure 1
for locations.
IF THERE IS A PROBLEM
1)
Check that all connections are secure, both main power cord and
Con A and Con B connections from power supply to preamp.
2)
Check that all input and output signal connections are secure.
3)
Ensure that all tubes are properly seated in their sockets.
4)
Make sure that the power supply is not located too close to the
preamp, other components, or any cables.
5)
If these do not resolve the problem, please call Rogue Audio
Technical Support on 570-992-9901.
Rogue Ninety-Nine Owners Manual
2
6 SN7
12AX7
Rogue Ninety- Nine Owners Manual
7
Figure 1
Cartridge
Loading
12AU7 -LG
12AT7-MG
12AX7-HG
h/l
Switches
