Ramsey Electronics Stereo System AA7 User Guide

ALL BAND HF, VHF, UHF  
ACTIVE ANTENNA  
Ramsey Electronics Model No.  
AA7  
Stuck for antenna space? Don’t want to string any more wires?  
This ACTIVE ANTENNA KIT gives you roof-top performance on  
a desk top!  
Great for perking up scanner reception.  
Dual preamp HF-VHF/UHF front panel switching.  
Circuit based on true active antenna research.  
Performance rivals units costing many times more!  
Front panel RF gain control.  
Uses Dual Gate MOSFET technology for low noise HF amplification,  
and a high gain microwave transistor for VHF/UHF.  
Includes internal telescopic whip antenna plus auxiliary antenna  
input jack for jazzing up existing antennas.  
Clear, concise assembly instructions carefully guide you to a  
finished kit that works FIRST time!  
Informative manual answers questions on theory, hookups and  
uses - enhances resale value, too!  
Ideal companion to any Ramsey receiver.  
Power switch cuts the AA7 active antenna in and out of the antenna  
line with no need to change cables.  
Runs on a standard 9 volt battery!  
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Ramsey Publication No. MAA7  
Manual Price Only: $5.00  
KIT ASSEMBLY  
AND INSTRUCTION MANUAL FOR  
AA7 ACTIVE  
ANTENNA KIT  
TABLE OF CONTENTS  
Introduction to the AA7 ............................................. 4  
Circuit and Device Description.................................. 4  
Active Antennas: Circuits With a Purpose ................ 5  
Parts List................................................................... 6  
Assembly Instructions............................................... 7  
Schematic Diagram .................................................. 8  
Parts Layout Diagram............................................... 9  
Initial Tests................................................................ 12  
Using your AA7......................................................... 12  
Troubleshooting Guide ............................................. 13  
Active Antenna Comparisons ................................... 14  
The AA7’s Enclosure ................................................ 14  
A Final Suggestion.................................................... 14  
Ramsey Kit Warranty................................................ 15  
RAMSEY ELECTRONICS, INC.  
590 Fishers Station Drive  
Victor, New York 14564  
Phone (585) 924-4560  
Fax (585) 924-4555  
AA7 3  
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INTRODUCTION TO THE AA7  
We believe that you will discover and agree with us that your new AA7 is  
the best VALUE in a true receiver antenna. In its simplest form, an “active  
antenna” is a small antenna going through an RF preamplifier to a receiver.  
Generally, the actual antenna may be of several different styles:  
broad-band (no tuning required)  
fixed-tuned (i.e., pre-set for a specific frequency)  
variable-tuning (permits peaking or “pre-selecting” a variety of band  
choices)  
It is easy to assume that the “ideal” active antenna would peak your  
desired signal or frequency band. Several excellent active antennas are  
available for this purpose in the $75 - $150 price range, but we would point  
out that using this kit plus an additional $1 in mini coax to approximate your  
antenna will work as well, or even better. In our humble opinion, if you really  
want to spend that much money, you’re better off spending an extra five  
dollars and buying a good quality receiver. (Study the Ramsey HR-series or  
our SR-1 shortwave receiver, and you will see how easy that idea can really  
be!)  
If what you want is a great quality active antenna for a whole lot less than  
others sell it for, the answer is obvious. The Ramsey AA7 active antenna.  
An active antenna is a compromise between what is ideal... and what is  
real. Real antennas are wire or tubing properly measured in meters, not  
transistors or variable capacitors. If you find yourself in a difficult antenna  
situation for casual listening or monitoring, we think that you’ll get more  
satisfaction from understanding and using your AA7 than from wishing that  
you spent your money on a tunable model would result in a real antenna!  
CIRCUIT AND DEVICE DESCRIPTION  
The AA7 features two independent, switchable RF preamplifiers. The HF  
(high frequency) section is located on the upper middle section of the  
schematic on page 6, while the VHF (Very High Frequency) / UHF (Ultra  
High Frequency) section is located on the lower middle section.  
Simple switching circuits play a major role in the practical use of the AA7.  
S2:B connects the RF input and output connectors in the “power off”  
position. This gives the receiver non-amplified access to the auxiliary  
antenna jack, as well as the on-board rod antenna. With S2 in its “power on”  
position, S1 selects between the two independent antenna amplifier  
configurations (HF or VHF).  
AA7 4  
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The dual-gate MOSFET amplifier circuit (Q1), selected with S1 in the “out”  
position is designated the HF preamp circuit, due to the exceptionally low  
noise level of its operation. This is ideal for enhancing weak CW-SSB  
signals. This amplifier performs the true “active antenna” function of the  
AA7.  
The 2SC2498 amplifier circuit (Q2), selected with S1 in the “in” position, is  
designated the VHF preamp circuit, due to the excellent VHF (very high  
frequency) and microwave (baked-potato frequency) response  
characteristics of the 2SC2498. With the on-board whip antenna adjustable  
for peak resonance throughout the VHF- UHF region (Wavelength [ft.] = 234/  
f [MHz] - terribly long for a baked potato), this mode of the AA7 is ideal for  
indoor, outdoor and portable use of VHF scanners and other receivers.  
Both modes are usable for HF, while the 2SC2498 offers higher gain but  
also a higher noise level. The user can easily choose either amplifier for  
copying any signal of interest. The front panel gain control (R5) is usable  
with either amplifier.  
ACTIVE ANTENNAS: CIRCUITRY WITH A PURPOSE:  
There is more to a true active antenna than any old preamp or preselector  
hooked to a piece of wire.  
The AA7 was designed with reference to research carried out by Ulrich L.  
Rohde and T.T.N. Bucher, who co-authored Communications Receivers:  
Principals and Design (New York: McGraw-Hill Book Company). Rohde also  
shares credit for the highly sophisticated Rohde-Schwarz Type HE010  
10KHz-80MHz Active Antenna. The book illustrates how proper design of a  
broadband active antenna can give receiver performance very comparable to  
a quarter-wave vertical ("passive antenna") for a given frequency. The  
book's footnotes cite considerable study by professionals on the optimum  
design of active antennas.  
A short rod antenna, such as the whip supplied with your AA7, "receives"  
signals from the whole radio spectrum. Hence if you were to connect it  
directly to the antenna connection of your HF SWL receiver or antenna  
connection, you may not be impressed. The reason is not so much that the  
antenna is too short, or not resonant, but that its performance is all but  
shorted-out by the receiver, which is “looking for” a more conventional  
antenna.  
A well-designed broadband active antenna considers field strength of the  
desired signal (measured in microvolts per meter of antenna length),  
atmospheric and other noise, diameter of the antenna, radiation resistance  
and antenna reactance at various frequencies, plus the efficiency and noise  
AA7 5  
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figure of the amplifier circuit which amplifies the signal from the antenna rod  
before it gets to the 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 among  
contemporary receiver designers, and that we did our homework in bringing  
you the economical AA7.  
AA7 ACTIVE ANTENNA KIT PARTS LIST  
Please verify that the following items are present before starting assembly.  
CAPACITORS  
ˆ 1 100 pF disc capacitor (marked 100 or 101) [C3]  
ˆ 4 .01 µF disc capacitor (marked .01, 103 or 10nF) [C1, C2, C5, C6]  
ˆ 1 4.7 µF to 10 uF electrolytic capacitor [C4]  
RESISTORS  
ˆ 1 100 ohm (brown-black-brown) [R4]  
ˆ 2 100K ohm (brown-black-yellow) [R3, R6]  
ˆ 1 220K ohm (red-red-yellow) [R2]  
ˆ 1 1M ohm (brown-black-green) [R1]  
ˆ 1 10K ohm PC mount potentiometer [R5]  
SEMICONDUCTORS  
ˆ 1 Dual gate MOSFET transistor (4 pins) [Q1]  
ˆ 1 2SC2498 or 2570 NPN VHF transistor [Q2]  
CONTROLS AND HARDWARE  
ˆ 2 DPDT push switches [S1, S2]  
ˆ 2 PCB- mounted RCA jacks [J1, J2]  
ˆ 1 9 volt battery hold-down clamp  
ˆ 1 9 volt battery snap connector  
ˆ 1 Telescoping whip antenna with mounting screw  
REQUIRED, NOT SUPPLIED  
ˆ 1 9 volt battery (alkaline or heavy-duty)  
OPTIONAL  
ˆ 1 Ramsey case and knob kit, or your own enclosure  
ˆ 1 LED “power on” indicator and 1K ohm resistor  
ˆ 1 External antenna terminated in RCA-type plug  
REQUIRED TOOLS  
ˆ Soldering Iron (Radio Shack #RS64-2072)  
ˆ Thin Rosin Core Solder (RS64-025)  
AA7 6  
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ˆ Needle Nose Pliers (RS64-1844)  
ˆ Small Diagonal Cutters (RS64-1845)  
ADDITIONAL SUGGESTED ITEMS  
ˆ Soldering Iron Holder/Cleaner (RS-64-2078)  
ˆ Holder for PC Board/Parts (RS64-2094)  
ˆ Desoldering Braid (RS-2090)  
ASSEMBLY INSTRUCTIONS  
The following assembly steps are given in accord with the LEARN-AS-  
YOU-BUILD philosophy for Ramsey Kits. To the extent that is reasonably  
possible, parts are installed in the order of signal flow as depicted on the  
schematic diagram, with some discussion of the components whenever  
useful.  
Because the AA7 is of great interest to people who simply enjoy shortwave  
listening and VHF monitoring, experienced ham operators should understand  
that our instructions are addressed to people for whom this may be their very  
first electronic kit project.  
First Assembly Steps  
Perform all assembly on a suitable surface which will not be damaged by  
hot solder. A cardboard box, cut so that it is flat tends to work well if you do  
not have such a surface conveniently available. Always use caution  
operating and storing a hot soldering iron. We like to live under a nifty motto  
here at Ramsey that we think you will agree with (or will come to agree  
with!). “A hot soldering iron looks just the same as a cold soldering iron.”  
Trust me... it’s true.  
Since you may appreciate some "warm-up" soldering practice as well as a  
chance to put some "landmarks" on the AA7 PC-board, we first will install  
some "hardware" components, to make the up-down, left-right orientation of  
the PC board as clear as possible.  
In ALL of the following instruction steps, our word "INSTALL" means to do  
the following:  
Insert the part, oriented correctly, into its correct holes in the PC-board.  
If helpful, gently BEND the part's wire leads or tabs to hold it into place,  
with the body of the part snugly against the top side ("component side")  
of the PC-board. The top side is the side that does not contain metal  
traces, but does have an outline of each part printed on it.  
AA7 7  
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AA7 8  
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AA7 PARTS LAYOUT DIAGRAM  
AA7 9  
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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 trimmings do not become lodged in PC-board  
solder connections.  
Soldering the AA7 Printed Circuit Board  
ˆ 1. Install J1, the RF input jack. Notice that it is connected directly to the  
screw hole for the extendable whip antenna. Solder all 4 points of the  
jack secure!  
ˆ 2. Install S1, one of the two push switches. Position it so that the  
plunger of the switch extends over the edge of the PC board. It fits  
correctly only one way and is on the same side of the board as J1, which  
you have already installed. Notice that this switch selects which  
preamplifier circuit will be used. We'll wire the VHF circuit path first,  
because it's a little easier. Solder all six points of the switch.  
ˆ 3. Install C3, 100 pf. immediately behind S1.  
ˆ 4. Install R6 100K [brown-black-yellow] next to C3. NOTE: Save the  
extra wires nipped away from C3, R6 and similar parts. You will use  
them to make jumper wires.  
ˆ 5. Notice that Q2, the 2SC2498 transistor is installed with the flat side  
facing the rear (antenna and receiver jacks) of the PC-board. Press the  
transistor gently but firmly into it three holes so that the exposed wire  
leads are as short as possible. Carefully solder all three leads on Q2.  
ˆ 6. Using a scrap component lead wire, install jumper wire 2 (JMP2) near  
S1. This connects the preamp that is selected by S1 to the coupling  
capacitor for the receiver jack.  
ˆ 7. Similarly, install JMP1. (This connects the J2 receiver jack directly to  
J1 and the whip antenna when S2 is in the out or off position.  
ˆ 8. Install R4, 100 ohms [brown-black-brown].  
ˆ 9. Install C6, .01 µF. which couples the output of the selected  
preamplifier path to the J2 receiver jack.  
ˆ 10. Install C2, .01 µF. When S1 is in the "out" or HF position, C2  
couples the RF input to the Dual gate MOSFET preamplifier you are  
about to build.  
ˆ 11. Install R1, 1 megohm [brown-black-green].  
ˆ 12. Install R2, 220K ohms [red-red-yellow].  
ˆ 13. Install C1, .01 µF.  
AA7 10  
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ˆ 14. Install R3, 100K [brown-black-yellow].  
ˆ 15. If you have completed Steps 4 through 14 correctly, you now have  
the 4 holes for Q1 surrounded by other parts, making it easy to find!  
Examine Q1, the dual-gate MOSFET. The schematic diagram shows  
why it has 4 leads. Insert Q1 so that the square tab is pointing directly at  
JMP2, but... DO NOT solder Q1's 4 leads until you are satisfied that the  
tab is oriented as explained, and that the 4 wires are in the respective  
holes without any twisting. Just as for Q2, keep Q1`s wires as short as  
possible. Solder all four leads of Q1.  
ˆ 16. Insert RF gain control R5 into the PC board, make sure it is seated  
securely. Solder the three pins and the two mounting tabs.  
ˆ 17. Install C5, .01 µF.  
ˆ 18. Install C4, the polarized electrolytic capacitor. Electrolytic capacitors  
have polarity and must be installed properly. The negative side of the  
capacitor is marked with a black stripe with negative sides. The PC  
board or the parts layout diagram will show the correctly labeled (+) sign  
next to the positive hole. Be sure to use the correct polarity.  
ˆ 19. Install S2, which controls DC power and also connects the antenna  
jack, J1, and the receiver jack, J2, directly together when in the turned  
“off” position. Solder all six points of the switch.  
ˆ 20. Install receiver jack J2. Solder all four points of the jack.  
ˆ 21. Install the battery snap connector (WITHOUT the battery for now,  
please). Make sure the positive (red) and negative (black) wires are  
connected in the correct holes. This PC board follows the accepted  
standard that the red wire denotes the positive hole (+) and the black  
wire denotes the negative (-) hole.  
ˆ 22. Install the battery hold-down clamp using a scrap component lead  
wire placed through the two holes in the clamp and into the PC-board  
holes. Pull the wire tight and then solder it firmly to the two PC-board  
points and to the clamp itself (on the top side of the PC board.) Be sure  
not to use too much solder on the clamp as it may keep the battery from  
sitting flat and securely in the clamp.  
ˆ 23. Using the mounting screw supplied, attach the whip antenna to its  
position on the PC-board. The whip antenna should point up from the  
component (top) side with the screw inserted through the bottom.  
Tighten it firmly to ensure a good electrical connection, don’t force it so  
hard that you break it or the PC board and it’s delicate traces. You may  
wish to lightly sand the plating from the screw head and solder it to the  
PC-Board.  
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ˆ 24. BEFORE connecting battery or conducting any tests, PLEASE  
recheck each of the preceding steps, looking especially for:  
quality of solder connections  
correct orientation of Q1 and Q2  
correct orientation of the electrolytic C4  
correct battery wire polarity  
correct values for resistors and capacitors  
INITIAL TESTS  
No adjustments or alignment is required. See the following section about  
preparing a reliable and convenient cable for the AA7 and your receiver as  
well as an optional add-on antenna.  
Testing the AA7 consists of turning it on, using it and checking that all its  
described features are operational. You will need to become accustomed to  
the signal strength in the highest range of the gain control. If you experience  
any problem, consult the Trouble-Shooting Hints section of this book.  
USING YOUR AA7  
For some of our kits, this "USING...." section becomes the longest part of  
the book, depending on the possible applications of the kit product. What is  
very nice about the AA7 is that using it is simple, enjoyable and immediate.  
We have two suggestions that will increase your enjoyment of the AA7 right  
from the beginning:  
ˆ 1. Prepare a reliable coaxial cable with the right connectors to run from  
the antenna input of your receiver or scanner to the RF output of the  
AA7 (RCA male plug required). If you do not have them at hand, a visit  
to Radio Shack should easily get you what you need.  
ˆ 2. Make a simple "supplementary portable antenna" of any design which  
is practical for YOU. Use a small-diameter coaxial cable neatly  
terminated in a male RCA male plug to mate J1. This antenna can be a  
dipole, or random wire with earth ground or counterpoise, a bigger  
vertical whip of some kind, a Slinky, or even a pair of alligator clips at the  
end of your coax line, ready to be clipped to any large metal surface that  
may be handy, from screen doors to bed springs! This accessory for  
your AA7 will help you explore the truth of "Ramsey's Antenna Rule" in a  
variety of travel situations: "If you want more signal, put up more metal!”  
A Caution to Ham, Maritime and CB Operators:  
If you are using the AA7 to boost reception on a transceiver of any kind,  
AA7 12  
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rather than only a receiver 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 one or both of the transistors.  
Transistor Placement Information:  
Both transistors may be ordered from Ramsey Electronics, but they also may  
be found at a local electronics parts distributor. You may use either "SK" or  
"ECG" replacements:  
3N201 = ECG454 or SK3991  
2SC2498 = ECG10 or SK9139  
LED Power On Indicator  
A visual power on indicator can be an enjoyable and practical enhancement  
of your completed kit. LEDs (Light Emitting Diodes) are available at low cost  
and are ideal for this purpose, providing you don't mind the extra current drain.  
Voltage for a standard LED is easily taken from the appropriate top terminal of  
S2. The switched +9V terminal is the middle of three terminals in the row  
nearest the center of the PC board. This positive DC must be connected to the  
anode (longer wire) of the LED. The cathode lead is connected through a  
proper current limiting resistor of about 1K ohm to the closest PC-board ground  
point. (Note: This can be locations such as the black wire of the battery, the  
mounting case of either jack, but it CANNOT be the antenna.) Mount the LED  
at any convenient point near the switch.  
TROUBLESHOOTING GUIDE  
The fact that there are two independent preamplifiers makes the AA7 easier  
to diagnose than many other devices. If a problem occurs only when S1 is  
pressed inward, troubleshooting can be concentrated on that part of the circuit.  
If the problem is common to both settings, then the components and  
connections common to both preamps should be checked. Make sure you  
have not omitted any of the jumper wires required.  
There are other characteristics or phenomena associated with preamplifiers  
and active antennas which do NOT mean that your AA7 is malfunctioning:  
Strong AC hum in the HF setting: The antenna is too close to an AC cord or  
power line, and/or the RF gain is set too high.  
HF signals stronger at VHF than at HF setting: As explained in the AA7  
circuit description, either preamp may be used for HF. Signal strength will be  
greater with the VHF preamp, but the HF signal-to-noise ratio should be better  
with the dual gate MOSFET HF section.  
AA7 13  
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Unusual oscillations in receiver: Some portable receivers not enclosed in  
metal cases may break into oscillation when connected to any RF  
preamplifier. Try reducing the AA7 gain control and make sure good  
grounds are on the interconnecting coax cables.  
Receiver overloading, heterodynes, images: A preamplifier will intensify  
any problems with selectivity and image rejection due to poor receiver  
design.  
ACTIVE ANTENNA COMPARISONS  
The author of this AA7 instruction manual has conducted extensive side-  
by-side comparisons of the AA7 with the Heathkit HD-1424 and MFJ  
Enterprises, Inc. Model 1020A active antennas, both of which have band-  
switched tunable preamplifiers as well as an understandably higher selling  
price. If all three units are compared, each using only its on-board whip  
extended to equal heights, the two tunable units do produce a stronger  
signal. We would hope so! However, attaching about two more feet of wire  
to the AA7's whip resulted in it delivering the strongest signal. Similarly,  
increasing the antenna lengths of the other units resulted in increased signal  
strength. It becomes a question of how much you wish to pay for the shortest  
possible indoor antenna! The AA7's competition performs well, but we are  
sure you will appreciate the AA7's versatility and budget pricing.  
THE AA7'S ENCLOSURE: THE FINISHING TOUCH  
The Ramsey Electronics custom case, panel and knob kit is optional for  
the AA7 as it is for all of our standard major PC-board kits. In it’s case, the  
finished AA7 will be attractive and virtually indestructible, so that the world of  
radio can be at your fingertips wherever you go. Use of our factory enclosure  
also enhances the resale value of your AA7.  
A FINAL SUGGESTION  
A small antenna is most effective whenever it can be outdoors and clear of  
any surrounding metal building structure. You may wish to use a mix of  
personal ingenuity and hardware store/junk-box parts to make a simple  
remote whip that can be quickly mounted on windows, windowsills, balcony  
rails, or handy points on cars, RVs, etc. We hope you will enjoy your AA7 in  
a wide variety of listening and monitoring situations.  
Kit building is FUN! Ramsey has a wide variety of nifty kits. Ask for our free  
catalog, where there are plenty more kits ideally suited for you!  
AA7 14  
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The Ramsey Kit Warranty  
Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved  
without contacting the factory.  
Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All  
Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual is  
your assurance that a team of knowledgeable people have field-tested several "copies" of this kit  
straight from the Ramsey Inventory. If you need help, please read through your manual carefully, all  
information required to properly build and test your kit is contained within these pages! However,  
customer satisfaction is our goal, so in the event that you do have a problem, take note of the  
following.  
1. DEFECTIVE PARTS: It's always easy to blame a part for a problem in your kit, however, customer  
satisfaction is our goal, so in the event that you do have a problem, take note of the following. Before  
you conclude that a part may be bad, thoroughly check your work. Today's semiconductors and  
passive components have reached incredibly high reliability levels, and its sad to say that our human  
construction skills have not! But on rare occasion a sour component can slip through. All our kit parts  
carry the Ramsey Electronics Warranty that they are free from defects for a full ninety (90) days from  
the date of purchase. Defective parts will be replaced promptly at our expense. If you suspect any part  
to be defective, please mail it to our factory for testing and replacement. Please send only the  
defective part(s), not the entire kit. The part(s) MUST be returned to us in suitable condition for testing.  
Please be aware that testing can usually determine if the part was truly defective or damaged by  
assembly or usage. Don't be afraid of telling us that you 'blew-it', we're all human and in most cases,  
replacement parts are very reasonably priced.  
2. MISSING PARTS: Before assuming a part value is incorrect, check the parts listing carefully to see  
if it is a critical value such as a specific coil or IC, or whether a RANGE of values is suitable (such as  
"100 to 500 uF"). Often times, common sense will solve a mysterious missing part problem. If you're  
missing five 10K ohm resistors and received five extra 1K resistors, you can pretty much be assured  
that the '1K ohm' resistors are actually the 'missing' 10 K parts ("Hum-m-m, I guess the 'red' band  
really does look orange!") Ramsey Electronics project kits are packed with pride in the USA. If you  
believe we packed an incorrect part or omitted a part clearly indicated in your assembly manual as  
supplied with the basic kit by Ramsey, please write or call us with information on the part you need and  
proof of kit purchase.  
3. FACTORY REPAIR OF ASSEMBLED KITS:  
To qualify for Ramsey Electronics factory repair, kits MUST:  
1. NOT be assembled with acid core solder or flux.  
2. NOT be modified in any manner.  
3. BE returned in fully-assembled form, not partially assembled.  
4. BE accompanied by the proper repair fee. No repair will be undertaken until we have received the  
MINIMUM repair fee (1/2 hour labor) of $25.00, or authorization to charge it to your credit card  
account.  
5. INCLUDE a description of the problem and legible return address. DO NOT send a separate letter;  
include all correspondence with the unit. Please do not include your own hardware such as non-  
Ramsey cabinets, knobs, cables, external battery packs and the like. Ramsey Electronics, Inc.,  
reserves the right to refuse repair on ANY item in which we find excessive problems or damage due to  
construction methods. To assist customers in such situations, Ramsey Electronics, Inc., reserves the  
right to solve their needs on a case-by-case basis.  
The repair is $50.00 per hour, regardless of the cost of the kit. Please understand that our technicians  
are not volunteers and that set-up, testing, diagnosis, repair and repacking and paperwork can take  
nearly an hour of paid employee time on even a simple kit. Of course, if we find that a part was  
defective in manufacture, there will be no charge to repair your kit (But please realize that our  
technicians know the difference between a defective part and parts burned out or damaged through  
improper use or assembly).  
4. REFUNDS: You are given ten (10) days to examine our products. If you are not satisfied, you may  
return your unassembled kit with all the parts and instructions and proof of purchase to the factory for a  
full refund. The return package should be packed securely. Insurance is recommended. Please do not  
cause needless delays, read all information carefully.  
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AA7 ACTIVE ANTENNA  
Quick Reference Page Guide  
Introduction to the AA7 .....................................4  
Circuit and Device Description..........................4  
Active Antennas: Circuits With a Purpose ........5  
Schematic Diagram ..........................................6  
Parts Layout Diagram.......................................7  
Parts List...........................................................8  
Assembly Instructions.......................................9  
Using your AA7.................................................12  
Troubleshooting Guide .....................................13  
Active Antenna Comparisons ...........................14  
Ramsey Kit Warranty........................................15  
REQUIRED TOOLS  
TOTAL SOLDER POINTS  
63  
Soldering Iron (WLC100)  
Thin Rosin Core Solder (RTS12)  
Needle Nose Pliers (MPP4 or RTS05)  
ESTIMATED ASSEMBLY  
TIME  
Beginner.............. 2 hr  
Intermediate ........ 1 hr  
Advanced ............ 30 min.  
ADDITIONAL SUGGESTED ITEMS  
Helping Hands Holder for PC Board/Parts  
(HH3)  
Technician’s Tool Kit (TK405)  
Desoldering Braid (RTS08)  
Manual Price Only: $5.00  
Ramsey Publication No. MAA7  
Assembly and Instruction manual for:  
RAMSEY MODEL NO. AA7 ACTIVE ANTENNA KIT  
RAMSEY ELECTRONICS, INC.  
590 Fishers Station Drive  
Victor, New York 14564  
Phone  
Fax  
(585) 924-4560  
(585) 924-4555  
www.ramsDeoywkniltosad.cfroomm Www.Somanuals.com. All Manuals Search And Download.  

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