Ramsey ElectronicsメーカーSA7の使用説明書/サービス説明書
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SA7—1 BROADBAND RF PREAMP ———— 100 KHz - 1.3 GHz • High gain - 2 0 dB Bro adband coverage. • Exce llen t rev ie w in F eb. 90, 73 Ma gazi ne. • Two stage feedback d esign ensures stable o peration. • Runs on 12-15 VDC @ 15 mA . • Com plete with a pplic at ions and hook-up i nstr uction s.
SA7—2 SA 7 I N T R OD UC TIO N: A "preamplifier" gives an initial boost, measured in decibels, to the level of a signal before it is processed by tuned circuits, filters, amplifiers, mixers, detectors or other circuit stages. Preamps may be designed for either RF or audi o use and may be either t uned or broadbanded.
SA7—3 P ARTS SUPPLIED WITH SA7 KI T Capacitors 1 2.2 pF capacitor [axial style, green body with red bands] (C6) 1 4.7 or 5 pF di sc capacitor (C1) 3 .
SA7—4 REQUIRED, NOT SU PPLIED 8-15 VDC power source your choice of powe r on-off switching RF input and output connectors (your choice of type) enclosure of your choice, if SA7 is not mounted inside receiver or counter, etc.
SA7—5 SA7 PRE-A MP ASSEMB L Y PROCEDURE Soldering 15 parts to a PC board is not a big job, but good performance of the SA7 r equires attention to keeping all leads as short and neat as possible.
SA7—6 5. Install C5, .01 uF. Notice that C5 lines up with the DC voltage supp ly points on the PC board. If you have y our red (+) and bl ack (-) supply wires ready, they could be installed now while correct polarity is on your mind. 6. Install R4, 1K ohms (brown-black-red) .
SA7—7 Installation of C6 and R6. The styl e of these components might be new to you, but don't be concerned. We' ll get them in right. Having inst alled all the conventional re sistors according to color code, note that the remaining resistor-like part is mark ed with 6 bands; the firs t two at one end should both be red.
SA7—8 Procedure for installing SMT R6: 1. Unpack from cardboard protective holder and study how R6 is made, usi ng the magnifier if necessary. 2. Notice that bot h ends are metallic - these are the soldering points. 3. Lightly pre-tin the PC boar d trace point s where R6 is to be positioned.
SA7—9 USING YOUR SA7 PRE-A MP The very best way to find out what your S A7 can do, and also cannot do, is to set one up right from the beginning with the input and out put conne ctions most practical for your uses.
SA7—10 FINAL NOTES A BOUT BRO A DBAND PRE- A MPS Yes, the Ramsey SA7 or PR2 RF pre- amp will give that prom ised boost to the signal st rength of that distant FM broadcast station that your wife, sist er or dad wants to tune in without so much static.
SA7—11 BROADBAND "ACTIVE A NTENN A" For situations where a shor t or indoor receiving antenna is nee ded, the SA7 preamp will give considerably improved performance even if the antenna is little more th an a collapsible whip or sh ort length of wire.
SA7—12 AN T SA 7 Fr e q . = 6. 28 L x C 1 A d di ng a t uned R F in put.
SA7—13 WA R N I N G : Under no circumstances should transmitter power be applied to the SA7. Although this seems common-sense, most receivers are in transceiver configuration and one slip of the mike key will blast your little SA7 to La-La Land.
SA7—14 The Ramsey Kit Warranty Please read carefu lly BEFORE ca lling o r writin g in a bout your ki t. Most pr oblem s can be sol ved w ithout contact ing t he fact ory. Notice that this is not a "fine print" wa rr anty. We want you to understand your rights and ours too! All Ram sey kits will work if assemble d properly.
SA7—15 Ramse y Electroni cs projec t kits a re packed with pri de in the U SA. If you bel ieve we packed an in correc t part or om itted a pa rt clearly indicated in your assembly manual as supplied with the ba sic kit by Ramsey , please write or call us with information on the part you need and proo f of kit purchase 3.
SA7—16 Published by Ramse y Electronics, Inc. Copyright 1994 All rights reserved. Ramsey Electronics, Inc. 590 Fishers Station Drive Victor, NY 14564 Phone (585) 92 4-4560 Fax (585) 92 4-4555 Call o.
デバイスRamsey Electronics SA7の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Ramsey Electronics SA7をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはRamsey Electronics SA7の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Ramsey Electronics SA7の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Ramsey Electronics SA7で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Ramsey Electronics SA7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 SA7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。
ですが、ユーザガイドが果たす重要な役割の一つは、Ramsey Electronics SA7に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちRamsey Electronics SA7デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
