Manuale d’uso / di manutenzione del prodotto VHF Low Noise Preamp Kit PR100 del fabbricante Ramsey Electronics
Vai alla pagina of 16
PR100 y 1 VHF LOW NOISE PREAMP KIT Ramsey Electronics Model No. PR100 • Extensive filtering for low noise operation, 1dB noise figure! • Three section tu ned circuit and doubl e helical filter • Centered on 145 MHz and is 2.
PR100 y 2 R A MSE Y TR A NS MITTER KI TS • FM100B Profess ional FM Ster eo Transmitter • FM25B S ythesized Ster eo FM Transmitte r • MR6 Mod el Rocket Tr acki ng Transmitter • TV6 Television T.
PR100 y 3 VHF LOW NOISE PREAMP KIT Ramsey Pu blication No. MPR100 Manual Price Only: $5.00 TABLE OF CONTENTS Introduction to the PR100 ......... .............. ...... 4 How it W orks ............ .......... .......... .............. ... 4 Schematic ..
PR100 y 4 IN TRO DU C TI ON TO TH E PR 10 0 This amplifier is a truly ne cessary piece of equipment for y our 2 meter receive applications. W ith 16dB of gain, y ou mount this up on yo ur mast on the antenna to boost those w e ak signals to a receivable level.
PR100 y 5 The RF passes throug h two more tank circuits consisting of L4 and C9 in the second, an d C12 and L5 in the third. Every time the RF goes through an additional tank circuit, the bandpass bandwidth of the RF is narrow er. The narrow er the bandwidth is before the active componen t of Q1, the better.
PR100 y 6 PA RTS LAY OUT D IAGRA M PA RTS LIST CAPACITORS 2 2.2pF ceramic capacitors (marked 2.2) (C4, C5) 1 10pF ceram ic capacitor (marked 10) (C7) 3 8.2pF ceramic capacitors (marked 8.2) (C8, C9, C 10) 1 22pF ceram ic capacitor (marked 22) (C6) 1 100pF ceram ic capacitor (marked 100, or 101) (C2) 1 .
PR100 y 7 RAMSEY "LEARN-AS-YOU-BUILD ASSEMBLY STRATEGY" W e'll start building on the left side and work our way across, installing the lower components up to the taller sized comp onents. This will make our placing and soldering o f components easy .
PR100 y 8 ASSEMBLY INSTRUCTIONS: 1. Orient the PC board as in the P arts La y o ut Diagr am . We will start with the left hand side of the bo ard, then go to the right. 2. Install C 6, the 22pF cera mic capacit or (m arke d 22). 3. Install C8, a 8.
PR100 y 9 18. Inst all C1, a . 01uF ce ra mic capacit or (m arke d 103, .01, o r 10n) . 19. Insta ll L2, anot her 2. 2uH in ductor ( green b ody, red-re d-gold s tripes) . 20. Install R3, a 18 ohm resistor (brown-grey- black). 21. Install C3, a .
PR100 y 10 ALI G NM EN T: Alignment is fairly simple if y ou follo w these gui delines . The f irst step is to back all of the lugs out of L3, L4, and L5 until they reach the top of the cans. FL1 should be ok, and won’t ne ed any adjusting. 1. Scre w L3 in 8 turns.
PR100 y 11 PR EA MP INSTA LLA TI ON This part of the manual assumes that y o u have a re ceiver or transceiver (if using a tr ansceiver a TR S witch is needed, like our RFS-1). This preamp operates off a 12 volt DC supply which is connected to a 2.2 µH inductor then to the cente r of the antenna cable near your radio(see diagra m on next page).
PR100 y 12 THE PR100 Hookup is simple if y ou are using coax cable such as RG-58 or better 50 oh m cable. Just run a piece from the jack marked RCVR (J3) o n the PR100 to the .01µF capacitor just before the radi o . Then a short piece is needed to go from the capacitor to the radio.
PR100 y 13 TROUBLESHOOTING GUIDE: Problem: W h en I inser t this in lin e, I do n’t obser ve an y gain in rece pti on. Solution: There are seve ral causes to the problem, but the major one is that the preamp has been asse mbled incorrectly. Ch ec k Q1 for correct installatio n, then check J3 for 12VDC.
PR100 y 14 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about y our kit. Mos t problems can be solved w it hout contacting the factory . Notice that this is not a "f ine print" wa rranty. W e want you to und ers tand your rights and ours too! All Ramsey kits w ill work if assembled properly.
PR100 y 15 4. BE accompanied b y the proper repair f ee. No repair will be undertaken u ntil we ha ve received the MINIMUM repair fee (1/2 hou r labor) of $25.00, or authorization to char ge it to y our cred it card acc ou nt. 5. INCLUDE a descriptio n of the problem and legible return addre s s.
PR100 y 16 VHF LOW NOISE PREAMPLIFIER Quick Referenc e Page Guide How it W orks ................ ............. .......... 4 Schematic ........... .......... ............. .......... 5 Parts Layout ............. .............. .......... ... 6 Strategy .
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 VHF Low Noise Preamp Kit PR100 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 VHF Low Noise Preamp Kit PR100 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Ramsey Electronics VHF Low Noise Preamp Kit PR100 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Ramsey Electronics VHF Low Noise Preamp Kit PR100 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Ramsey Electronics VHF Low Noise Preamp Kit PR100, 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 VHF Low Noise Preamp Kit PR100.
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 VHF Low Noise Preamp Kit PR100. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Ramsey Electronics VHF Low Noise Preamp Kit PR100 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.
