Vista 1 - Manuals - manualsarea.com

Page 3 - SAFETY PRECAUTIONS; IMPORTANT SAFEGUARDS; grounded, consult your electrician or local power company.

SAFETY PRECAUTIONS IMPORTANT SAFEGUARDS PLEASE READ CAREFULLY ALL THE FOLLOWING IMPORTANT SAFEGUARDS THAT ARE APPLICABLE TO YOUR EQUIPMENT SAFETY 1. Read the User’s Manual and refer to it frequently during your experimenting. 2. Retain the User’s Manual for future reference. 3. All warnings should b...

Page 6 - ASSEMBLING THE KIT

ASSEMBLING THE KIT If you purchased an unassembled kit, you will have all the parts, including tubes and printed circuit board. Parts are in marked bags, with reference numbers and value written on a bag. Reference numbers are the ones printed on the PCB, so locating parts positions should be very e...

Page 7 - CONNECTIONS; ELECTRICAL SCHEMATICS:

CONNECTIONS NOTE: Before you turn the amplifier on, make sure the speaker connections are properly hooked up, or that headphone selector switch is in the headphone position. Never run the amplifier without speakers or headphones, since this may damage transformers. When turning the unit on, make sur...

Page 12 - CONFIGURATION JUMPERS – TRIODE PARALLEL CONNECTION

CONFIGURATION JUMPERS – NEGATIVE FEEDBACK SELECTION: The Model 1 has optional negative feedback connection provided by jumper J161 (J162) – FBK. By moving the shorting block horizontally across the two lower pins, the negative feedback will be engaged. The upper two pins are shorting block holders w...

Page 14 - CONNECTING OUTPUT TRANSFORMERS:; primary resistance.

CONNECTING OUTPUT TRANSFORMERS: For basic model, the output transformers should be designed to provide 5k Ω primary resistance. For the full pack, the primary resistance should have 2.5k Ω rating. Rating of the secondary winding should correspond to the impedance of your speakers (4, 8 or 16 Ω , typ...

Page 15 - CONNECTING HEADPHONES:; and you may notice; VOLUME CONTROL AND AUDIO INPUTS:

Again, for best stereo image, they should be connected in phase. The second harmonic distortion is common with single ended amplifiers (it gives them specific, rich sound), and air transports sound with some degree of the second harmonic distortion too. It is possible to notice change in sound and r...

Page 16 - UPSIDE - DOWN ASSEMBLY

UPSIDE - DOWN ASSEMBLY The Model 1 printed circuit board (PCB) was designed with top to bottom symmetry. This symmetry enables building a tube amplifier with “tube audio look”, where tubes are mounted on top of the chassis. All parts, except tube sockets, can be mounted on the bottom of the board an...

Page 18 - PARTS LIST

PARTS LIST Parts with asterisks in the VALUE column are used in the Full-Pack assembly. Item Qty Reference EPN Value 1 2 R41, R42 N/U 2 14 R11, R12, R51, R52, R121, R122, R141, R142, R181, R182, R231, R232, R241, R242 200-0003 1k 3 8 R21, R22, R61, R62, R201, R202, R391, R392 200-0003 *1k* 4 2 R71, ...

Vista 1 - Manuals

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