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Crown Audio VT-15 manuale d’uso - BKManuals

Crown Audio VT-15 manuale d’uso

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Un buon manuale d’uso

Le regole impongono al rivenditore l'obbligo di fornire all'acquirente, insieme alle merci, il manuale d’uso Crown Audio VT-15. La mancanza del manuale d’uso o le informazioni errate fornite al consumatore sono la base di una denuncia in caso di inosservanza del dispositivo con il contratto. Secondo la legge, l’inclusione del manuale d’uso in una forma diversa da quella cartacea è permessa, che viene spesso utilizzato recentemente, includendo una forma grafica o elettronica Crown Audio VT-15 o video didattici per gli utenti. La condizione è il suo carattere leggibile e comprensibile.

Che cosa è il manuale d’uso?

La parola deriva dal latino "instructio", cioè organizzare. Così, il manuale d’uso Crown Audio VT-15 descrive le fasi del procedimento. Lo scopo del manuale d’uso è istruire, facilitare lo avviamento, l'uso di attrezzature o l’esecuzione di determinate azioni. Il manuale è una raccolta di informazioni sull'oggetto/servizio, un suggerimento.

Purtroppo, pochi utenti prendono il tempo di leggere il manuale d’uso, e un buono manuale non solo permette di conoscere una serie di funzionalità aggiuntive del dispositivo acquistato, ma anche evitare la maggioranza dei guasti.

Quindi cosa dovrebbe contenere il manuale perfetto?

Innanzitutto, il manuale d’uso Crown Audio VT-15 dovrebbe contenere:
- informazioni sui dati tecnici del dispositivo Crown Audio VT-15
- nome del fabbricante e anno di fabbricazione Crown Audio VT-15
- istruzioni per l'uso, la regolazione e la manutenzione delle attrezzature Crown Audio VT-15
- segnaletica di sicurezza e certificati che confermano la conformità con le norme pertinenti

Perché non leggiamo i manuali d’uso?

Generalmente questo è dovuto alla mancanza di tempo e certezza per quanto riguarda la funzionalità specifica delle attrezzature acquistate. Purtroppo, la connessione e l’avvio Crown Audio VT-15 non sono sufficienti. Questo manuale contiene una serie di linee guida per funzionalità specifiche, la sicurezza, metodi di manutenzione (anche i mezzi che dovrebbero essere usati), eventuali difetti Crown Audio VT-15 e modi per risolvere i problemi più comuni durante l'uso. Infine, il manuale contiene le coordinate del servizio Crown Audio in assenza dell'efficacia delle soluzioni proposte. Attualmente, i manuali d’uso sotto forma di animazioni interessanti e video didattici che sono migliori che la brochure suscitano un interesse considerevole. Questo tipo di manuale permette all'utente di visualizzare tutto il video didattico senza saltare le specifiche e complicate descrizioni tecniche Crown Audio VT-15, come nel caso della versione cartacea.

Perché leggere il manuale d’uso?

Prima di tutto, contiene la risposta sulla struttura, le possibilità del dispositivo Crown Audio VT-15, l'uso di vari accessori ed una serie di informazioni per sfruttare totalmente tutte le caratteristiche e servizi.

Dopo l'acquisto di successo di attrezzature/dispositivo, prendere un momento per familiarizzare con tutte le parti del manuale d'uso Crown Audio VT-15. Attualmente, sono preparati con cura e tradotti per essere comprensibili non solo per gli utenti, ma per svolgere la loro funzione di base di informazioni e di aiuto.

Sommario del manuale d’uso

  • Pagina 1

    VT-15 Vacuum Tube Recording Channel Operating Instructions D.W. FEARN[...]

  • Pagina 2

    D.W. FEARN VT-15 Recording Channel Ho w to Cont act us: T elephone: 6 1 0-793-2526 F ax: 6 1 0-793- 1 479 Mail: P .O. Bo x 57 , P ocopson, P A 1 9366 U .S.A. Shipping A ddress: 1 82 Bragg Hill R oad W est Chester , P A 1 9382 U .S.A. e-mail: dwf ear n@dwf ear n.com www .dwf ear n.com[...]

  • Pagina 3

    D . W . F EARN H AND - CR AFTED PR OFESSION AL RECORDIN G EQUIPMENT www .dwfear n.com P .O. Bo x 57 P ocopson, P A 1 9366 U .S.A. T el: 6 1 0-793-2526 F ax: 6 1 0-793- 1 479 Cer tificate of RoHS Compliance D.W . F ear n is committed to manuf acturing pr oducts t hat ar e fully-com pliant wit h t he EU R oHS Dir ectiv e. The f ollo wing pr oducts ar[...]

  • Pagina 4

    4[...]

  • Pagina 5

    D.W. FEARN VT-15 Recording Channel 5 VT-15 Vacuum Tube Recording Channel Final Test Report Serial Number_______________ Mains Voltage 120/240 set to __________________ Date ________________ Tested by ________ VU Calibrated to _______________ dBm Test Equipment ____________________________ Microphone ________________________ Frequency Response: 20 c[...]

  • Pagina 6

    D.W. FEARN VT-15 Recording Channel 7 Table of Contents R oHS Com pliance Dat a .................................................................. 3 Final T est R epor t ............................................................................ 5 W ar ranty ........................................................................................ 9 [...]

  • Pagina 7

    D.W. FEARN VT-15 Recording Channel 8 D.W . F ear n shall not be liable f or technical or editorial er r ors or omissions in t his manual, nor f or incident al or consequential damag es r esulting fr om t he use of t his material. This instr uction manual cont ains inf or mation pr otected b y cop yright. N o par t of t his manual ma y be photocopie[...]

  • Pagina 8

    D.W. FEARN VT-15 Recording Channel 9 Limited 5-Year Warranty During t he w ar ranty period, D.W . F ear n will, at no additional char g e, r epair or r eplace def ectiv e par ts wit h ne w par ts. This w ar ranty does not extend to an y VT - 1 5 t hat has been damag ed or r ender ed def ectiv e as a r esult of accident, misuse, or abuse; b y t he u[...]

  • Pagina 9

    D.W. FEARN VT-15 Recording Channel 11 History of the VT-15 Vacuum Tube Recording Channel W it h t he success of t he VT - 1/VT -2 V acuum Tube Micr ophone Pr eam plifiers, t he VT - 4 LC Equalizer , t he VT -7 Ster eo Com pr essor , and t he VT -I/F and VT -3 V acuum Tube DIs, t her e w as a gr eat tem pt ation to combine t he f eatur es of all of [...]

  • Pagina 10

    D.W. FEARN VT-15 Recording Channel 12[...]

  • Pagina 11

    D.W. FEARN VT-15 Recording Channel 13 Mic Input 150 ohms Input Load Impedance 1.5k ohms Minimum Input Level -65 dBm nominal Maximum Input Level @ 20 cps -30 dBm without pad -5 dBm with 20 dB pad Instrument Input impedance 1 Megohm Line Input Load Impedance 40k ohms Maximum Line Input Level @ 20 cps +25dBm (+35dBm with pad) Gain <60 dB optimum (c[...]

  • Pagina 12

    D.W. FEARN VT-15 Recording Channel 14 Compression Range up to 30dB Compression method Pulse-width modulator Equalizer: Low-frequency Boost 100 cps, shelving Low-frequency Cut 80 cps, shelving High-frequency Boost 9.8 kc, peaking High-frequency Q 0.6 to 1.7 High-frequency Cut 12 kc, shelving Power Requirements 100, 120, or 220 V AC 50/60Hz, 50 W Dim[...]

  • Pagina 13

    D.W. FEARN VT-15 Recording Channel 15 2. DESCRIPTION The D.W . F ear n VT - 1 5 utilizes cir cuitr y de v eloped f or t he VT - 1/VT -2 V acuum Tube Micr ophone Pr eam plifiers, t he VT -7 Ster eo Com pr essor , and t he VT -4 LC Equalizer . The Model VT - 1 5 R ecor ding Channel is designed to pr o vide r ecor ding pr of essionals wit h a sonicall[...]

  • Pagina 14

    D.W. FEARN VT-15 Recording Channel 16[...]

  • Pagina 15

    D.W. FEARN VT-15 Recording Channel 17 3. INST ALL A TION The VT - 1 5 is car efully pack ed f or shipment and it should surviv e all but t he most br ut al han - dling. If t her e is an y damag e, k eep t he shipping material f or use during an y possible claim f or damag e wit h t he shipper . Included in t he bo x: 1) The VT - 1 5 R ecor ding Cha[...]

  • Pagina 16

    D.W. FEARN VT-15 Recording Channel 18 t he back panel f or inst allations t hat use separate chassis gr ounding. If gr ound loop hum is detected, a car eful check of t he studio gr ounding scheme is needed. The VT - 1 5 is less suscep - tible to gr ounding pr oblems t han man y studio de vices. Connections The INPUT connector is a XLR-3 f emale wir[...]

  • Pagina 17

    D.W. FEARN VT-15 Recording Channel 19 4. OPER A TION INITIAL SET-UP IS CRITICAL for getting the best performance from your VT-15! The VT - 1 5 has tr emendous v ersatility , but wit h t hat v ersatility comes t he potential f or f or v er y un pleasant sound. Think of t he VT - 1 5 as a small studio chain in one bo x: mic pr eam p, com - pr essor ,[...]

  • Pagina 18

    D.W. FEARN VT-15 Recording Channel 20 Control Set-up In put togg le switches: Mic/Line switch - as appr opriate f or t he sour ce 0/-20 switch - 0 1 50/Lo-Z switch - 1 50 (unless y ou ar e using a non-st andar d im pedance mic) +48 switch - on f or phantom-po w er ed condenser mics, ot her wise off R e v/Phase switch - do wn (no phase r e v ersal) [...]

  • Pagina 19

    D.W. FEARN VT-15 Recording Channel 21 6. A djust t he Eq contr ols f or t he desir ed sound. (R emember to use t he Boost and Cut tog et h- er to shape t he sound.) 7 . Switch t he VU meter back to t he VU position. 8. A djust t he Gain contr ol f or a nor mal indication. P eak s should rar ely go into t he r ed (0VU). This pr ocedur e will pr o vi[...]

  • Pagina 20

    D.W. FEARN VT-15 Recording Channel 22 C ONTR OLS (see Figure 1 .) The VT - 1 5 fr ont panel is divided into t hr ee main ar eas of contr ols. On t he left is t he In put sec - tion, to its right is t he Com pr essor section, fur t her right is t he Equalizer section, and f ar right is t he output and po w er section. Input Toggle Switch Section The[...]

  • Pagina 21

    D.W. FEARN VT-15 Recording Channel 23 es t he polarity of t he output of t he VT - 1 5. A det ailed discussion of t he application of phase re v ersal of individual micr ophones is be y ond t he scope of t his manual. Ev en when t her e is only one micr ophone being r ecor ded, it ma y be useful to tr y t he “R ev erse” position of t he Phase c[...]

  • Pagina 22

    D.W. FEARN VT-15 Recording Channel 24 add distor tion to lo w fr equency sounds. (This is tr ue of all com pr essors.) A f ast r elease time adds density to t he sound, often wit h t he com pr ession becoming mor e obvious. Long r elease times mak e t he com pr ession less obvious and mor e natural, but can “punch holes” in t he lo w er le v el[...]

  • Pagina 23

    D.W. FEARN VT-15 Recording Channel 25 should r esult in “0 VU” on a pr operly aligned r ecor der . (This r ef er ence le v el can be chang ed; see t he Maintenance Section.) This is a tr ue VU meter , and conf or ms to AS A St andar d C1 6.5- 1 954. In t he GR position, t he VU meter monitors t he amount of g ain r eduction (com pr ession). As [...]

  • Pagina 24

    D.W. FEARN VT-15 Recording Channel 26 1 . Use t he best quality mic cable y ou can. W e don’t belie v e y ou ha v e to use esoteric wir e, but do use a good cable designed f or lo w im pedance micr ophones. A quality cable wit h gold-cont act connectors is best. 2. Ther e should be no additional cables, connectors, junction bo x es, patch jack s,[...]

  • Pagina 25

    D.W. FEARN VT-15 Recording Channel 27 5. THEOR Y OF OPER A TION Preamp Section Input section Micr ophone le v el (1 50 ohm sour ce im pedance, balanced, -50 dBm nominal) or line le v el (600-ohm sour ce, +4dBm nominal) audio enters t hr ough t he XLR-3 f emale INPUT connec - tor to t he In put selector switch bank. In t he 0 position, t he in put i[...]

  • Pagina 26

    D.W. FEARN VT-15 Recording Channel 28 r esponse, lo w phase shift, ex cellent squar e w av e r esponse, lo w distor tion, and high noise immunity . The secondar y of is connected dir ectly to t he grid of t he first am plifier st ag e. First stage The first st ag e is a selected 6072 configur ed as a Class A v olt ag e am plifier wit h a g ain of a[...]

  • Pagina 27

    D.W. FEARN VT-15 Recording Channel 29 VU Meter and Meter Amplifier A tw o-st ag e IC operational am plifier is used to isolate t he VU meter fr om t he VT - 1 5 output. An output sam ple is deriv ed fr om t he primar y of t he output transf or mer . The meter calibra - tion is set wit h a 20-tur n trimmer potentiometer . R ef er ence le v el (0 VU)[...]

  • Pagina 28

    D.W. FEARN VT-15 Recording Channel 30[...]

  • Pagina 29

    D.W. FEARN VT-15 Recording Channel 31 6. MAINTENANCE The VT - 1 5 is built wit h only t he highest quality par ts and will pr o v e to be extr emely r eliable. V acuum tubes and electr olytic capacitors, ho w ev er , ha v e a finite useful lif e and must be r eplaced e v entually . Top Cover Removal R emo ving t he top co v er allo ws access to t h[...]

  • Pagina 30

    D.W. FEARN VT-15 Recording Channel 32 Tubes also sometimes de v elop a micr ophonic r esponse — t he y will r espond to ambient noise and vibration. This can be an insidious pr oblem since measur ements in a quiet r oom will indi - cate per f ect per f or mance. Gently t apping t he tube shields while listening to t he output at a nor mal monitor[...]

  • Pagina 31

    D.W. FEARN VT-15 Recording Channel 33 Troubleshooting Most pr oblems will be traced to def ectiv e v acuum tubes. Ho w e v er , if nor mal tests do not eas - ily r e v eal t he pr oblem, f eel fr ee to call t he f actor y f or assist ance. If y ou lack access to a qual - ified service technician wit h v acuum tube equipment r epair experience, y ou[...]