Ramsey ElectronicsメーカーPR100の使用説明書/サービス説明書
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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 TRANSMITTER KITS • FM100B Professional FM Stereo Transm itter • FM25B S ythesized Stereo FM Tr ansmitter • MR6 Model Rocket Tracki ng Transmitter • TV6 Television Transmitt.
PR100 y 3 VHF LOW NOISE PREAMP KIT Ramsey Publication No. MPR100 Manual Price Only: $5.00 TABLE OF CONTENTS Introduction to the PR100 ............ ................. 4 How it W orks ................ ............. .............. ...... 4 Schematic .....
PR100 y 4 INTR OD UC TIO N TO TH E PR1 00 This amplifier is a truly necessa ry piece of equipment for your 2 meter receive applications. With 16dB of gain, you mount this up on your mast on the antenna to boost those weak signals to a receivable level.
PR100 y 5 The RF passes through tw o more tank circuits consisting of L4 and C9 in the second, and C12 a nd L5 in the third. Every time the RF goes through an additional tank circuit, the bandpass bandwidth of the RF is narrowe r. The narrowe r the bandwidth is before the active component of Q1, the better.
PR100 y 6 PA RTS LAY OUT D IAGRA M PA RTS LI ST CAPACITORS 2 2.2pF ceramic capacitors (marked 2.2) (C4, C5) 1 10pF ceramic capacitor (marked 10) (C7) 3 8.2pF ceramic capacitors (marked 8.2) (C8, C9, C 10) 1 22pF ceramic capacitor (marked 22) (C6) 1 100pF ceramic capacitor (marked 100, or 101) (C2) 1 .
PR100 y 7 RAMSEY "LEARN-AS-YOU-BUILD ASSEMBLY STRATEGY" We'll start building on the lef t side and work our way across, installing the lower components up to the taller sized comp onents. This will make our placing and soldering of componen ts easy.
PR100 y 8 ASSEMBLY INSTRUCTIONS: 1. Orient the PC board as in the Parts La yout Diagram . We will start with the left hand side of the bo ard, then go to the right. 2. Install C6, the 22pF cer amic capacitor (m ark ed 22). 3. Install C8, a 8.
PR100 y 9 18. Insta ll C1, a .01uF cera mic ca pacitor (m arke d 103, .01, o r 10n). 19. Install L 2, another 2.2uH in ductor ( green bod y, red- red-gold str ipes). 20. Install R3, a 18 ohm resistor (brown-grey-black). 21. Install C3, a .
PR100 y 10 ALIG NM EN T: Alignment is fairly simple if y ou follow these guidelines. 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 need a ny adjusting. 1. Screw L3 in 8 tu rns.
PR100 y 11 PR EA MP IN STA LLA TION This part of the manual assumes that you have a r eceiver or transceiver (if using a transc eiver a TR Switch 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 center of the ante nna cable near your radio(se e diagram on next page).
PR100 y 12 THE PR100 Hookup is simple if you are using coax cable such as RG-58 or better 50 oh m cable. Just run a piece from the jack marked RCVR (J3) on th e 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: When I insert this in line, I do n’t observe an y gain in recepti on. Solution: There are severa l causes to the problem, but the major one is that the preamp has been assembled incorrectly . Check Q1 for correct installation, then check J3 for 12VDC.
PR100 y 14 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about y our kit. Most problems can be solved wit hout contacting the factory. Notice that this is not a "fine print" wa rrant y. W e want you to unders tand your rights and ours too! All Ramsey kits w ill work if assembled properly.
PR100 y 15 4. BE accompanied by the proper repair fee. No repair will be undertaken until we have rece ived the MINIMUM repair fee (1/2 hour labor) of $25.00, or authorization to ch arge it to your credit card acc ount. 5. INCLUDE a description of the proble m and legible return address.
PR100 y 16 VHF LOW NOISE PREAMPLIFIER Quick Referenc e Page Guide How it W orks ....................... ................ 4 Schematic .............. .............. ................ 5 Parts Layout ................. ................. ...... 6 Strategy ..
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Ramsey Electronics PR100を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はRamsey Electronics PR100の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
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