Vista 1 manual Final Words

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FINAL WORDS

Once again, thank you for your purchase. We hope that the Model 1 will give you hours and hours of fun and have you experience a multitude of different qualities of the “tube sound”. Once you have exhausted all of the options, we hope that you will “retire” the amplifier from your bench into a nice chassis and have it rest on your work desk or in the bedroom accompanied by a PC or an MP3 player of some kind. Once all experiments are finished, make sure to permanently short selected jumpers (one way is to bend the pins and solder them together) in order to prevent deterioration of contacts over time. Robust design should provide you with years of pleasant sounds, with only maintenance being change of tubes, once the original ones are too weak to rumble. Our design is really gentle with the tubes, so they should last much longer than tubes in some other designs that try to pull the last milliWatt out of them.

Finally, we want to remind you once again to take extreme caution while working with high voltages. If you are not thoroughly familiar with the safety procedures, feel free to enlist help of a relative or friend. There are many very knowledgeable people in this field and they all share passion for spreading the art and science of high quality sound reproduction.

Copyright, ENG Vista, Inc. 2007

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Contents Model Thank YOU Safety Precautions Page Getting Started Assembling the KIT Connections Electrical Schematics16-19V Board Layout and Dimensions Page Configuration Jumpers Grid Bypass Capacitor Configuration Jumpers Mode of OperationHeater Configuration Jumpers Configuration Jumpers Negative Feedback SelectionConfiguration Jumpers Triode Parallel Connection Connecting Power Connecting Speakers Connecting Output TransformersVolume Control and Audio Inputs Connecting HeadphonesUpside Down Assembly Final Words EPN Parts List