Manuale d’uso / di manutenzione del prodotto 2 1/2 Watt Super Sleuth Audio Amplifier del fabbricante Ramsey Electronics
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• Audio b ooster amps f or r adios, Walk mans etc. • Replacement amplifiers • High sensi tivi ty long dis tance l iste ning amplif ier f or ‘B ig Ear s upe r sleuth ’ sno opin g! • Mini PA.
INTROD UCTI ON TO THE BN9 The BN9 is a high gain miniature am plifier w ith all sorts of possible a pplications, limited only by your imagination. Its s mall size and econo mical pric e make it a useful addition to many projec ts and re- pairs. The BN9 has an amplificat ion gain fa ctor of 3000 with as muc h as 2 1/2 w atts of audio pow er output.
BN9 PARTS LIST ❒ 2 .01µF ceram ic disk capacitor s (C1, C2 ) ❒ 3 4.7µF or 10µF electrol yt ic capa citors (C 3,C4,C 6) ❒ 1 100µF to 500µF elect rolytic capacitor (C5) ❒ 1 220K ohm resisto.
BN9 PC BOARD ASSEM BLY As you can see this is a fairly simple and straightforward project, but be careful ! Don’t rush and improperly mount a part or leave long lead leng ths on components. As all good technici ans and experimenters know, part s must be mounted f lush to th e P C board.
ASSEMBLY OF THE BN9 ❒ 1. Orient the circuit board as shown in the Parts Layout Diagram. ❒ 2. Install U1, th e LM-3 80 IC into the P C boa rd, making sure that all 14 pins are in their proper holes. Also note in which direc tion the not ch is or iented in the Parts Layout Diagram.
The following electrolytic c apacitors are polarize d and must be insert ed with proper orientat ion to the polarity markings . Usually the capac itors are marked wi th a side stripe to indicate the ne gative (-) pin or rarely a plus symbol to indi cate the plus side.
INIT IA L T ESTS: ❒ 1. Connect up 8 t o 15 volts of DC power. For s i mplicity use a red wire for posit ive (+) and a black wire for negative (-). Wait! check pola rity before sw itching on the supply. ❒ 2. Connect any speaker ranging fr om an impedance of 3 ohms to 45 ohms.
MICROPHONE AND A UDIO INPUT CONSIDERATION You may choose almost any transducer to convert soun d int o an electrical signal fo r your BN9. Some of the transduc ers are as follows; ceramic, crystal, dy.
Problem: Output drops out and then bu ilds up again each time volume control is advanced. Solution: You are running w ith too muc h input power. Ch ange circuit for lower gain operation or re- duce input level. Problem: Very strong AC hum. Solution: Input may not be shielded or c onnected proper ly.
Solution: Mo torboati ng is a sound like the “putt-put t-putt” of a two cycle motor boat . While it may be a novel idea for a simple kit, it’s not exactly what we have in mind here. This is usually noticed at higher audio levels due to the power drawn from the power source.
BN9 A PPLICA T ION IDEA S: 1. High s ensitiv ity listenin g dev ice Compon ents required: • Small microphone such as RAMSEY MC1, mini-electret mike. • 5K to 100K potent iometer for volume control.
2. Intercom Com ponents re quired: • DPDT s witch (m omentary m ost practi cal) • Two 8 ohm speakers • Your choice of enc losures IN OU T Low gai n B N -9 Re mo t e Local 3.
IN OU T H o rn S p e a k e r Hi g h Ga i n B N- 9 4. A uxiliary amplifier for mini re ceiv ers Compon ents required : • 8 Ohm sp eaker • 5K to 100 K Po tentio meter • 10 ohm resistor To Rece iv .
P r obe 200V IN OU T 5. Signal Tracer T est Probe Components req uired: • .01uF C eramic ca pacito r rated a t at le ast 200V for tu be ci rcuits • 5K to 100K Potentiom eter • Shielded test prob.
The Ra msey Kit Wa rranty Please read c arefull y BEFOR E callin g or wr iting in a bout your kit. Mos t proble ms can be solved without c ontacting th e fac tory. Notic e that t his is no t a "fin e print" w a rrant y . We want y ou to underst and y our rights a nd ours too! Al l Ra msey kits will w ork if assembled properly .
Published by Ra mse y Electronics, Inc. Copyright 1994 All rights reserved. Ramsey Electronics, Inc. 590 Fishers Station Drive Victo r, NY 14564 Phone (585) 924-4560 Fax (585) 92 4-4555 www.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
