Trafomatic Audio Primavera, User Manual

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05
PRIMAV ERA - HEADPHONE Amplifier - User Manual
GETTING STARTED - ABOUT
YOUR HEADPHONE AMPLIFIER
Your Primavera Headphone Amplifier was designed to provide a high value based on its high
performance, which is a result of a carefully designed circuit and optimized component selec -
tion. The design utilizes minimum number of active parts and top quality passive elements.
The Primavera’s impressive output power of 9W into 50 Ohms makes it capable of driving
the most demanding loads and its sound quality and striking design set it as an icon of a
modern high-end audio electronics.
The design is based on an excellent direct heated triode (DHT) SV811-10 in a single-ended
configuration, driven by an excellent 6S45P (6C45Π) tube. High capacity power supply is domi -
nated by a custom, in-house made power transformer and choke. New generation of Trafomatic
Double-C core output transformers ensures maximum linearity and wide frequency response.
The Primavera has balanced (XLR) and unbalanced (RCA) inputs, and the following headphone
outputs:
One Neutrik 4-pin balanced connector,
Two Neutrik 3-pin XLR connectors
One
¼
” Neutrik connector
Output impedance can be set in the 25 to 600 Ohms range, making it easy to optimize sound
quality for multitude of headphones.
HANDLING AND REPLACING VACUUM TUBES
Many people have never had experience handling vacuum tubes. Process is very similar to
hand 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 and removing
the amplifier’s cover, 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 the unit is
disconnected 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 ail as soon as the amplifier is
powered on. Carefully align the pins with the socket and gently insert the tube.
Never force a tube into a socket.
The Primavera is designed around the 6S45P (6C45Π) vacuum tube as a gain stage and
SV811-10 as the power tube . When the tubes are due for replacement, it is best to use the
same brand and model number.
Should you decide to buy replacement tubes from Trafomatic Audio , rest assured that they are
fully tested before the shipment.