Trafomatic Audio TARA 30A, User Manual

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05
TARA 3 0A - Line Level Preamplifier - User Manual
GETTING STARTED
ABOUT YOUR LINE PREAMPLIFIER
Your TARA 30A Line Level Preamplifier was designed to provide high value based on
its exceptional performance, which is a result of a carefully designed circuit and optimized
component selection. The design utilizes minimum number of active parts and top quality
passive elements. The TARA 30 was conceived as a preamplifier with recognized Trafomatic
Audio’s uncompromised sound quality.
The design is based on an excellent EML 30A vacuum tube . The EML30A is driven by the
6N30P tube
, with resulting total gain of 21dB; alternatively, the 6N6P tube can be used and
the gain in that case is 25dB. The preamplifier operates in Class A push-pull, with custom
designed output transformers. A dedicated dual power supply is housed in a separate chas-
sis, for maximum separation.
The TARA 30A preamplifier comes with a standard, beautifully crafted remote control.
The TARA 30A has three (3) balanced (XLR) inputs and one (1) single-ended (RCA) input.
There are two (2) balanced outputs and two (2) single-ended outputs. As valuable additional
features, phase reversal and multiple ground lift switches are also available for maximum
versatility.
HANDLING AND REPLACING VACUUM TUBES
Many people have never had experience handling vacuum tubes. Process is very similar to
handling incandescent light bulbs. As with the light bulbs, you should not touch a vacuum
tube when it is operating since you can burn yourself. Similarly, if a tube is dropped on a
hard surface it may break or change critical operating parameters. When replacing the tubes
allow sufficient time, minimum 30 minutes, for tubes to cool down and internal capacitors to
discharge.
Before you insert a tube you should make certain that the unit is turned off and disconnect-
ed from the AC outlet. Inspect the tube for cracks and physical damage. Make sure that the
pins are straight. If you need to straighten the pins, be very careful as it may cause the glass
envelope to break, causing the tube to lose the vacuum and fail as soon as the preamplifier
is powered on. Carefully align the pins with the socket and gently insert the tube.
Never force a tube into a socket.
The
TARA 30A preamplifier
is designed around the
EML 30A and 6N30P vacuum tubes.
When the tubes are due for replacement, please contact Trafomatic Audio or authorized
dealer for recommendations about substitutes. The 6N30P tube can be replaced with the
6N6P if more gain is required (25dB vs. 21dB).
Should you decide to buy replacement tubes from Trafomatic Audio, rest assured that they
are fully tested before the shipment.