Table of Contents
Advertisement
POWER BOOSTER
AMPLIFIER
Ramsey Electronics Model No.
Looking to boost the output of a small transmitter or signal
generator? Look no further. Our general purpose broadband
power amplifier is ideal for the test bench as well as any ham
radio applications. Get up to 1 watt RF power output!
•
State of the art "MMIC" amplifier technology ensures great
quality amplification.
•
The perfect lab amplifier for any lab bench! Excellent
bandwidth and gain characteristics make the LPA1 a useful tool
for amateurs and professionals alike.
•
Boost almost any low power transmitter, up to 10mW maximum
input, from 300Khz to 1Ghz with up to one watt of power.
•
Specially engineered PC board makes building a snap!
•
No maintenance operation makes the LPA1 perfect for hassle
free operation.
•
Amplification at up to 7,000 times the input power at 10Mhz!
•
Perfect for boosting your QRP transmitter. Works on all bands
from 160 meters to the 1Ghz band!
LPA1
Advertisement
Table of Contents
Related Manuals for Ramsey Electronics LPA1
Summary of Contents for Ramsey Electronics LPA1
- Page 1 State of the art “MMIC” amplifier technology ensures great quality amplification. • The perfect lab amplifier for any lab bench! Excellent bandwidth and gain characteristics make the LPA1 a useful tool for amateurs and professionals alike. • Boost almost any low power transmitter, up to 10mW maximum input, from 300Khz to 1Ghz with up to one watt of power.
- Page 2 Ramsey Electronics publication No. MLPA1 Revision 1.7a First printing: April 2003 COPYRIGHT 1994 by Ramsey Electronics, Inc. 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, Inc.
-
Page 3: Table Of Contents
KIT ASSEMBLY AND INSTRUCTION MANUAL FOR LPA1 POWER BOOSTER AMPLIFIER TABLE OF CONTENTS Introduction to the LPA1 ....4 How It Works ........4 LPA1 Parts List ......... 7 Schematic Diagram ......8 Parts Layout Diagram ....... 9 Feedback Circuit Considerations ..10 LPA1 Assembly Instructions .... -
Page 4: Introduction To The Lpa1
Welcome to the LPA Power Booster Amplifier Thank you for purchasing the LPA1 Power Booster Amplifier. The LPA -1 is a state of the art amplifier for almost any low power transmitter. With a fre- quency range from 100Khz to almost 1Ghz, it is no wonder that it is so ver- satile. -
Page 5: Kit Building Tips
Q2 for proper operation. Ramsey “Learn-as-you-build” Power Booster Assembly Strategy Since the LPA1 runs at very high frequencies, it is extremely important that you follow the instructions provided. Incorrectly installed components, exces- sively long component leads, and bad solder joints may mean that your kit won’t work. - Page 6 PC board. This will avoid adding stray ca- pacitance or inductance into the circuit. Component Topside solder (Disc Cap shown) connection "Normal" bottomside connection LPA1 • 6...
-
Page 7: Lpa1 Parts List
RAMSEY LPA1 Power Booster Amplifier Parts List SEMICONDUCTORS MAR3 RF amplifier [Small, black, round on one side] (U1) PNP transistor [marked 221334] (Q1) MRF581 NPN power transistor [Small, black, round and marked “581”] (Q2) Red LED (D1) CAPACITORS .01uF disc capacitor [marked .01 or 103 or 10nF] (C1,2,4,5,6,7,8,9) -
Page 8: Schematic Diagram
LPA1 • 8... -
Page 9: Parts Layout Diagram
LPA1 PARTS LAYOUT DIAGRAM LPA1 • 9... -
Page 10: Feedback Circuit Considerations
Feedback Circuit: Your Ramsey LPA1 Power Booster Amplifier has been designed to give you great amplification over a wide range of frequencies. Included in the design of the circuit is a feedback loop consisting of the parts R8 and C5. You must decide whether or not to include the feedback circuit into your kit. -
Page 11: Lpa1 Assembly Instructions
3. Install J3, the input RCA jack. Mount it the same way that you did the first one. Remember to solder the connections on the right and left sides to both the top and bottom sides of the board. LPA1 • 11... - Page 12 (Be careful not to break their legs off. Capacitors have feelings too!) Solder the connection closest to the outside of the board on both the top and bottom sides of the board. LPA1 • 12...
- Page 13 Pass 1 1/2 turns through the holes, filling three holes and leaving a lead coming out at each end. Trim the ends to 1/4“ and bend as needed for neat installation. Solder it so that it is laying flush with the board. LPA1 • 13...
- Page 14 These two leads both go to ground. Check to see that the “M” is still closest to L1. Solder the two leads on the top and bottom sides of the board. 30. With the two remaining leads flat against the underside of the board, LPA1 • 14...
- Page 15 Congratulations! You have just completed your LPA1 Power Booster Amplifier. Please take a few minutes to look over your kit and ensure that all of the parts have been assembled correctly. Since a few of the parts may be unfamiliar to you, you may want to be extra sure that they have been inserted correctly.
-
Page 16: Setup And Testing
That’s all that you need to do to test it out. You may now use your LPA1 for it’s intended purpose. You do not need to do anything else to use it because you have just set it up during testing. - Page 17 - complete and mail the order form. This saves you the small order fee and normal handling charge. Component Price (ea) SubTotal MAR 3 RF AMP $8.10 MRF 581 NPN $8.85 221334 PNP $.95 Postage & Handling 1 . 0 0 TOTAL LPA1 • 17...
- Page 18 LPA-1. However, just as a knife or drug may be abused, so may the LPA-1. It is your responsibility to use this amplifier legally and safely. We urge you to know and follow all guidelines governing usage of this device. LPA1 • 18...
-
Page 19: Ramsey Kit Warranty
'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... - Page 20 LPA1 POWER BOOSTER AMPLIFIER Quick Reference Page Guide Introduction to the LPA1 ....4 How it works ........4 LPA1 Parts list ........7 Schematic diagram ......8 Parts Layout diagram ....... 9 Feedback circuit considerations ..10 LPA1 Assembly instructions ..... 11 Setup and testing ......
Need help?
Do you have a question about the LPA1 and is the answer not in the manual?
Questions and answers