Table of Contents
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ALL BAND
ACTIVE ANTENNA
Ramsey Electronics Model No.
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.
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.
Includes telescopic whip antenna .
Can be used with existing antenna.
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 AA7B active antenna in and out of the
antenna line with no need to change cables.
Runs on a standard 9 volt battery or external power supply!
HF, VHF,
UHF
AA7B
•
1
AA7B
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Table of Contents
Related Manuals for Ramsey Electronics AA7B
Summary of Contents for Ramsey Electronics AA7B
- Page 1 Ideal companion to any Ramsey receiver. Power switch cuts the AA7B active antenna in and out of the antenna line with no need to change cables. Runs on a standard 9 volt battery or external power supply! •...
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Page 2: Victor, New York
COPYRIGHT 2006-2009 by Ramsey Electronics, LLC 590 Fishers Station Drive, Victor, New York 14564. All rights reserved. No portion of this publication may be copied or duplicated without the written permission of Ramsey Electronics, LLC Printed in the United States of America. -
Page 3: Table Of Contents
Ramsey “Learn-As-You-Build” Assembly Strategy .. 8 Schematic Diagram........... 10 Parts List ..............12 Assembly Instructions ..........13 Initial Tests..............15 Using your AA7B............15 Troubleshooting Guide..........16 A Final Suggestion............ 17 Specifications............18 Ramsey Kit Warranty ..........19 RAMSEY ELECTRONICS, LLC... -
Page 4: Circuit Description
9VDC battery. If an external supply is being used it will connect to the AA7B by its plug being inserted into Jack J3. The plug being installed causes the ’SW’ terminal inside of J3 to disconnect from the ’RING’... - Page 5 U1 from any DC levels that might be present at J1 and allow the AC, in this case RF signals, to enter the AA7B. U1 is an electronic relay. This device is really neat in that it performs like the old fashioned big mechanical relays of yester-year.
- Page 6 5 and 3 connect. If you follow the signal from J1 through U1 you will see that the signal is connected through C11 to U5 pin 3 and then out U5 pin 5 to J2. This has connected the antenna through the AA7B directly to your receiver! • AA7B...
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Page 7: Parts Layout Diagram
PARTS LAYOUT DIAGRAM Ramsey Electronics, LLC Active Antenna AA7B Rev 1.2 • AA7B... -
Page 8: Ramsey "Learn-As-You-Build" Assembly Strategy
We will be happy to help you with any problems you may run into. Contact information is provided on the inside back cover of this manual. This is a mixed signal project meaning there is digital, audio, and RF circuitry • AA7B... - Page 9 IMPORTANT NOTE! The surface mount parts in your kit have been preinstalled for you. Please do not call the factory for your missing parts; simply look over the board over and you’ll find them already soldered into place. • AA7B...
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Page 10: Parts List
AA7B ACTIVE ANTENNA KIT PARTS LIST CAPACITORS 14 .01 µF disc capacitor (marked .01, 103 or 10nF) [C1-4, C6-15] 2 10 µF electrolytic capacitor [C5,C16] INDUCTORS 2 22 µH (red-red-black) [L1,L2] RESISTORS 1 220 ohm (red-red-brown) [R7] 1 6.8K ohm (blue-gray-red) [R11] 2... -
Page 11: Assembly Instructions
Because the AA7B 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. - Page 12 Make sure to install the flat side in the same direction as shown on the boards silkscreen or in your Parts Location diagram. Unlike every other component to this point, this LED is not • AA7B...
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Page 13: Initial Tests
AA7B and your receiver as well as an optional add-on antenna. Testing the AA7B consists of turning it on, using it and checking that all of its described features are operational. You will need to become accustomed to the signal strength in the highest range of the gain control. -
Page 14: Troubleshooting Guide
"If you want more signal, put up more metal!” A Caution to Ham, Maritime and CB Operators: If you are using the AA7B to boost reception on a transceiver of any kind, rather than only a receiver or scanner, make sure it is not possible to transmit by accidentally pressing a mike button or CW keyer. -
Page 15: A Final Suggestion
RVs, etc. We hope you will enjoy your AA7B in a wide variety of listening and monitoring situations. -
Page 16: Specifications
AA7B SPECIFICATIONS Frequency of Operation: 1 MHz to 800 MHz Bandwidth: >800 MHz Gain: 1 to 150 MHz: >20 dB* 150 to 400 MHz >12 dB* 400 to 500 MHz >10 dB* 500 to 800 MHz >5 dB* RF Input... -
Page 17: Ramsey Kit Warranty
“1K ohm” resistors are actually the “missing” 10 K parts ("Hum-m-m, I guess the orange band really does look red!") Ramsey Electronics project kits are packed with pride in the USA by our own staff personnel. - Page 18 Desoldering Braid RAMSEY ELECTRONICS, LLC Manual Price Only: $5.00 590 Fishers Station Drive Ramsey Publication No. MAA7B Victor, New York 14564 Assembly and Instruction manual for: Phone (585) 924-4560 RAMSEY MODEL NO. AA7B (585) 924-4555 ACTIVE ANTENNA KIT • AA7B...