Gebruiksaanwijzing /service van het product 1 van de fabrikant Vista
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M M o o d d e e l l 1 1 E E x x p p e e r r i i m m e e n n t t e e r r ’ ’ s s S S E E A A u u d d i i o o A A m m p p l l i i f f i i e e r r U U s s e e r r ’ ’ s s M M a a n n u u a a l l 500-0001MR4 http://audio.
Dear Customer We at ENG Vista want to ta ke this opportunity to thank you for purchasing the Model 1 Experimenter’s SE Audio Amplifie r. The people that stand behind y our amplifier draw on more than a decade of professional electronics desi gn and manufacturing ex perience.
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.
17. Unplug this product from the wall outlet befor e 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.
GETTING STARTED The Model 1 amplifier kit was designed to provide: 1. a universal tube amplifier suitable for every day listening to the music from your PC or portable music source, or as a guitar amplifier easy to overdrive; 2. a headphone amplifier; 3.
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 referenc e numbers and value written on a bag. Reference numbers are the ones printed on t he PCB, so locating parts positions should be very easy.
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.
8 Vf PHONES Vf4b R82 220k/0.5W 202-0001 Vf4a C132 10u/350V 100-0001 R252 27R/2W 206-0002 R51 1k 200-0003 J102 161-0001 1 2 3 4 R290 0R N/A R22 *1k* 200-0001 Vf3a R201 *1k* 200-0003 C111 **220u/35V** 1.
BOARD LAYOUT AND DIMENSIONS: The following Figure shows the component layout and dimensions of the board (in mils – 1mil=0.001inch), mounting holes and locations of tubes, potentiometers, switch and headphone connector, as well as locations of input jacks.
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CONFIGURATION JUMPERS – MODE OF OPERATION: The Model 1 has four groups of jumpers intended for setting a mode of operation – Pentode mode (P), Ultralinear mode (UL) and Triode mode (T). Ultralinear mode can only be used with output transformer that have additional terminal for UL operation.
CONFIGURATION JUMPERS – NEGATIVE FEEDBACK SELECTION: The Model 1 has optional negative feedback connecti on provided by jumper J161 (J162) – FBK. By moving the shorting block horizontally across the two lower pins, the negative feedback will be engaged.
CONNECTING POWER: As any other vacuum tube amplifier, Model 1 needs two voltages for proper operation: (1) Plate, or Anode voltage, Va and (2) Heater, or filament voltage Vf. Plate voltage should be brought to the terminal block J80 and filament voltage to J90.
CONNECTING OUTPUT TRANSFORMERS: For basic model, the output transformers should be designed to provide 5k Ω primary resistance. For the full pack, the primar y 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 , typically).
Again, for best stereo image, they should be connected in phase. The second harmonic distortion is common with single ended amplifiers (i t gives them specific, rich sound), and air transports sound with some degree of the second harmonic distortion too.
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.
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 diffe rent qualities of the “tube sound”.
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, R72 202-0001 *220 k/0.
Een belangrijk punt na aankoop van elk apparaat Vista 1 (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen Vista 1 heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens Vista 1 vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding Vista 1 leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over Vista 1 krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van Vista 1 bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de Vista 1 kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met Vista 1 . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
