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Manual Ramsey Electronics AA7

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  • Ramsey Electronics AA7 - page 1

    AA7 • 1 ALL BAND HF , VHF , UHF ACTIVE ANTENNA Ramsey Electronics Model No. AA 7 • Great fo r perking up s canner reception. • Dual preamp HF-VHF/UHF front panel s witching. • Circuit based on true active antenna research. • Performance rivals units costing many times more ! • Front panel RF gain contr ol. • Uses Dual Gat e MOSFET te ...

  • Ramsey Electronics AA7 - page 2

    AA7 • 2 PARTI A L LIST OF A V A IL ABLE KITS RA MSEY TRA NSMIT TER K IT S • FM10, FM25B FM Stereo Transmi tters • FM100 Super Pr o FM Transmitter • MR6 Mod el Rocket Tracki ng Transmitter • AM1 , AM 25 AM Tr a ns m i t te r s RAMSEY RECEIVER KITS • FR1 FM Broa dcast Receiver • A R1 A ircraft Band Receiver • SR2 Shortw ave Receiver ? ...

  • Ramsey Electronics AA7 - page 3

    AA7 • 3 AA7 ACTIVE ANTENNA KIT Rams ey Publication No. MAA7 Manual Price Only: $5.00 TABLE OF CONTENTS Introduction to the AA7 .................... ................. ........ 4 Circuit and Device Description ....................... ........... 4 Active Antennas: Circuits W ith a Purpose . ............... 5 Parts List .. .................... ..... ...

  • Ramsey Electronics AA7 - page 4

    AA7 • 4 INTR ODU CTI ON TO THE AA7 We believe that you will discover and ag ree with us that your new AA7 is the best VALUE in a true re ceiver antenna. In its s implest form, an “act ive antenna” is a small ante nna going throug h an RF pr eamplifier to a receiver. Generall y , the ac tual ant enna ma y be of several diff erent styles: • b ...

  • Ramsey Electronics AA7 - page 5

    AA7 • 5 The dual-g ate MOSFET amp lifier circuit (Q 1), selected with S1 in the “o ut” position is designated the HF preamp circuit, due to the exce ptionally low noise level of its operation. This is ideal for enhan cing weak C W -SSB signals. This amplif ier perform s the true “a ctive antenna” fu nction of the AA7. The 2SC2 498 amplifi ...

  • Ramsey Electronics AA7 - page 6

    AA7 • 6 figure of the amplifier circ uit which amplifies the signal from the ante nna rod before it gets to th e receiver's RF input. We mention these things, with no need to get into a lot of engineering detail, just to let you know that "Active Antennas" are a serious topic a mong contemporary re ceiver designers, and that w e di ...

  • Ramsey Electronics AA7 - page 7

    AA7 • 7  Needle Nose Pliers (RS64-1844)  Small Diagonal Cutters (RS64-1845) ADDITIONAL SUGGESTED IT EMS  Soldering Iron Holder/Cleaner (RS-64-2078)  Holder f or PC Board/P arts (RS64-2094)  Desoldering Braid (RS-2090) ASSEMBLY INSTRUCTIONS The f ollowing assembly step s are given in ac cord with the LEARN-AS- YOU-BUILD philosophy f ...

  • Ramsey Electronics AA7 - page 8

    AA7 • 8 ...

  • Ramsey Electronics AA7 - page 9

    AA7 • 9 AA 7 PA RTS LAYO UT D IAG RAM ...

  • Ramsey Electronics AA7 - page 10

    AA7 • 10 • SOLDER ALL wires or pins of the part, whether the 2 wires of a resistor or the 3 or 4 wires of a transistor. • Trim or Nip all excess wires extending beyond each solder connection, taking care that wire trimm ings do not beco me lodged in PC-board solder connections. Soldering the AA7 Printed Circuit Board  1. Install J1, the RF ...

  • Ramsey Electronics AA7 - page 11

    AA7 • 11  14. Install R3, 100K [brown-black-yellow].  15. If you have co mpleted Steps 4 through 14 correctly, you now have the 4 holes for Q1 surrounded by other parts, mak ing it easy to find! Examin e Q1, the dual-ga te MOSFET. The sch ematic diagram shows why it has 4 leads. Insert Q1 so that the square tab is pointing directly at JMP2, ...

  • Ramsey Electronics AA7 - page 12

    AA7 • 12  24. BEFORE connecting battery or conducting any tests, PLEASE recheck each of the pr eceding steps, looking es pecially for: • quality of solder conne ctions • correct orientation of Q1 and Q2 • correct orientation of the electrolytic C4 • correct battery wire polarit y • correct values f or resi stors and ca pacitors INITI ...

  • Ramsey Electronics AA7 - page 13

    AA7 • 13 rather than only a re ceive r or scanner, make sure it is not possible to transmit by accidentally pressing a mike button or CW keyer. Transmitted RF into the AA7 is likely to ruin on e o r both of the transistors. Transisto r Placement Information: Both transistors may be ordered from Ramsey Electronics, but they also may be found at a ...

  • Ramsey Electronics AA7 - page 14

    AA7 • 14 Unusual oscillations in receiver: So me portable receivers not enclosed in metal cases may break into oscilla tion wh en conne cted to any RF preamplifier. Try reducing the AA7 gain control and make sure good grounds are on the interconnecting coax cables. Receiver overload ing, heterodynes, images: A preamplifier will intensify any prob ...

  • Ramsey Electronics AA7 - page 15

    AA7 • 15 The Ramsey Kit W arranty Please read c arefully BEFORE call ing or writi ng in abo ut your kit. M ost pro blems can be solved without contacting the facto ry. Notice that thi s is not a "fin e print" warranty. We want you to u nderstan d your rights a nd ours to o! All Ramsey kits w ill work if assemble d properly. The very fac ...

  • Ramsey Electronics AA7 - page 16

    AA7 • 16 AA7 AC TIV E AN TENN A Quick Reference Page Guide Introduction to the AA7 ................ .................... . 4 Circuit and Device Description ............ .............. 4 Active Antennas: Circuit s With a Purpose . ....... 5 Schematic Diagram .................. .................... .... 6 Parts Layout Diagram ..... ................ ...

Manufacturer Ramsey Electronics Category Stereo System

Documents that we receive from a manufacturer of a Ramsey Electronics AA7 can be divided into several groups. They are, among others:
- Ramsey Electronics technical drawings
- AA7 manuals
- Ramsey Electronics product data sheets
- information booklets
- or energy labels Ramsey Electronics AA7
All of them are important, but the most important information from the point of view of use of the device are in the user manual Ramsey Electronics AA7.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Ramsey Electronics AA7, service manual, brief instructions and user manuals Ramsey Electronics AA7. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Ramsey Electronics AA7.

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A complete manual for the device Ramsey Electronics AA7, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Ramsey Electronics AA7 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Ramsey Electronics AA7.

A complete Ramsey Electronics manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Ramsey Electronics AA7 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Ramsey Electronics AA7, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Ramsey Electronics AA7, that we can find in the current document
3. Tips how to use the basic functions of the device Ramsey Electronics AA7 - which should help us in our first steps of using Ramsey Electronics AA7
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Ramsey Electronics AA7
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Ramsey Electronics AA7 in a specific country, if it was not possible to solve the problem on our own.

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