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manual abstract
4 Dear Customer We at ENG Vista want to take this opportunity to thank you for purchasing the Model 1 Experimenter’s SE Audio Amplifier. The people that stand behind your amplifier draw on more than a decade of professional electronics design and manufacturing experience. We are committed to providing our customers with the high quality sound at an affordable price. We have achieved this goal through modern design, quality parts, expert components sourcing and efficient manufacturing. We are confident that your amplifier will be a pleasure to experiment with and that you will gain a valuable experience. When you are ready to move to the next stage in your experimental work, the Model 1 will give you many years of listening pleasure as a part of your audio system. Before using this amplifier, please take the time to carefully read and understand the safety instructions and operating procedures. Becoming familiar with all details about your amplifier will ensure safe usage and reliable operation. Take special care when operating with high voltages and making adjustments. The effort you invest now will be well rewarded as the time goes by. THANK YOU! ENG Vista, Inc. YOUR SAFETY IS VERY IMPORTANT TO US. PLEASE READ CAREFULLY THE FOLLOWING NOTES AND SAFETY PRECAUTIONS. THANK YOU. This kit is not intended for beginners. It requires familiarity with safe procedures for tests, measurements and modifications of high voltage equipment. Exercise extreme caution when working with high voltages and always unplug the power before making any changes or adjustments. NOTE: Please make sure to check our website at for updates, test results and latest news. On our website you can also order spare parts. Feel free to contact us with any questions or comments. We are looking forward to hearing from you. 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 be strictly adhered to. 4. Follow instructions to the last detail. 5. This product should be operated using only the type of power source indicated in this manual. 6. Always use an electrical outlet that is grounded. If you do not know whether the outlet is grounded, consult your electrician or local power company. 7. For continued protection against fire hazard, replace fuses with the same type and rating of the fuses specified. When changing fuses, completely remove power from the circuit. 8. Power supply cords and all connecting cables or wires should be routed so that they are not likely to be walked on or pinched. Pay particular attention to cords and cables at plugs, receptacles and terminal blocks. Always use wires with adequate ratings and safety certifications (CE, UL, etc.) 9. During operation the tubes get very hot. Do not touch the tubes since this may result in a severe burn. Allow several minutes after removing power for tubes to cool down before touching them. 10. Turn off the unit as soon as you stop actively using it. Unplug the power supply from the wall during a lightning storm or when the product is to be left unattended and unused for longer periods of time. 11. Do not use this product near water or in wet areas. Damp basements should be avoided. 12. The product should be placed away from heat sources such as radiators, heaters, stoves or other appliances that produce heat. Also avoid putting the unit in the direct rays of the Sun. 13. Proper ventilation is crucial for safe and reliable operation. Never place anything on top of your amplifier that could obstruct airflow and cause the parts to overheat and damage the amplifier. Do not place your amplifier in a rack or bookcase unless proper ventilation is provided. 14. Care should be taken to prevent objects from falling and liquids from spilling into the unit. Do not subject the unit to excessive smoke, dust, vibration or shock. 15. During experimenting, make sure that all jumpers are properly seated in the correct position, that there are no foreign objects or solder bridges. 16. Always wear protective glasses and exercise caution when powering unit after any change is made. If possible, gradually rise input voltage and look for any abnormalities – smell or smoke, tubes overheating (excessive glow), etc. 17. Unplug this product from the wall outlet before making any changes. Wait until tubes have cooled down. 18. When using replacement parts, be sure to use parts with sufficient voltage and power rating and adequate current carrying capability. 19. Should it become necessary to replace your tubes, remove the AC power plug from the wall and allow thirty minutes for the high voltage capacitors to discharge. 20. If you have any questions regarding safe and reliable operation of your amplifier, please email us at audio@engineeringvist...