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Instruction Manual
6 METER FM
Ramsey Electronics Model No.
Check out the 6 meter action with this simple and fun to build
FM receiver. Receive crystal-clear signals from thousands of
miles away! Six meters is a fascinating band! Tune the entire 6
Meter band or the VHF low Police and Fire band.
•
Tunes any 5 MHz portion of the 40 to 60 MHz band.
•
Excellent performance, less than 1 uV sensitivity.
•
Tuned input, low noise preamp stage.
•
True Dual-conversion superhet design with 2 pole
Ceramic High IF and 6 pole Ceramic low IF filters!
•
Front Panel Volume, Squelch, and Tuning controls.
•
Excellent receiver for beginners and seasoned pros!
•
Informative manual answers questions on theory, hook-
ups, and uses - enhances resale value, too!
•
Add our case set for a finished 'Pro' look. Cases match
all Ramsey products.
•
Clear, concise assembly instructions carefully guide
you to a finished kit that works the FIRST time!
RECEIVER KIT
FR6
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Summary of Contents for Ramsey Electronics FR6
- Page 1 6 METER FM RECEIVER KIT Ramsey Electronics Model No. Check out the 6 meter action with this simple and fun to build FM receiver. Receive crystal-clear signals from thousands of miles away! Six meters is a fascinating band! Tune the entire 6 Meter band or the VHF low Police and Fire band.
- Page 2 Ramsey Electronics publication NO. MFR6 Rev. E1 First printing: January 1992 COPYRIGHT 1992 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.
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Page 3: Table Of Contents
KIT ASSEMBLY AND INSTRUCTION MANUAL FOR FR6 6 METER FM RECEIVER KIT TABLE OF CONTENTS ntroduction to the FR6 ....4 Circuit Description ......5 Parts List ........6 Simplified Block Diagram ....8 Parts Layout Diagram ....9 Schematic Diagram ....... 10 FR6 Assembly Instructions ... -
Page 4: I Ntroduction To The Fr6
INTRODUCTION FM and repeaters on 6 meters? You bet! There's not a lot to say about using the FR6 receiver once its been correctly built and aligned. If 6 meters is "dead”, it resembles the usual 2 meter action. If 6 meters is "hot", you’ll find an amazing variety of crystal-clear FM signals from many thousands of miles away! If there are local 6 meter repeaters in your area, the FR6 will be just as active as the local repeater gang. -
Page 5: Circuit Description
BUILDING YOUR FR6 KIT There are just over 200 solder connections on the FR6 printed circuit board. That means your work could be 99% excellent and you could STILL have 2 or 3 cold solder points or solder bridges. Since this circuit is more... -
Page 6: Parts List
1 33K ohm [orange-orange-orange] (R14) 4 47K ohm [yellow-violet-orange] (R4,8,13,21) 1 100K ohm [brown-black-yellow] (R16) 1 470K ohm [yellow-violet-yellow] (R15) 1 1 megohm [brown-black-green] (R10) Capacitors 1 4.7 or 5 pF (C2) 2 10 pF (C1,5) 1 22 pF (C19) FR6 • 6... - Page 7 (adapter for 1/8" mono plug). If you prefer to use another size and style jack, we suggest that you still install the original jack and then wire your own jack in parallel with it rather to rough up the PC board to accommodate your jack. FR6 • 7...
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Page 8: Simplified Block Diagram
FR6 BLOCK DIAGRAM U2, 3359 FR6 • 8... -
Page 9: Parts Layout Diagram
FR6 PARTS LAYOUT DIAGRAM FR6 • 9... -
Page 10: Schematic Diagram
FR6 • 10... -
Page 11: Fr6 Assembly Instructions
Use enough solder for a solid connection. Also, if you plan to use an enclosure other than the custom Ramsey enclosure and knob kit, you may wish to locate the controls differently than provided by FR6 • 11... - Page 12 IC directly to the board. Reasons for doing this might include the peace of mind of beginners afraid of damaging the IC, or experienced builders testing the merits of the SA602's cousin, the SE602. However, please be aware that we have seen more service problems with FR6 • 12...
- Page 13 (-) sign clearly shown. The value of C14 is not critical and may be any value from 100 to 220 uF. 35. Install C14, 100 to 220 uF, observing correct polarity. 36. Install C15, 4.7 or 10 uF, observing correct polarity. FR6 • 13...
- Page 14 45. Install R11, 1K ohms [brown-black-red]. 46. Install R22, 2 ohms [red-black-gold]. 47. Install C29, .01 uF [marked .01, 103, or 10 nF]. 48. Install C30, 4.7 or 10 uF electrolytic, observe correct polarity. 49. Install R18, 18K ohms [brown-gray-orange]. FR6 • 14...
- Page 15 66. Install C16, .01 uF [marked .01 or 103 or 10 nF]. 67. Install C17, .01 uF [marked .01 or 103 or 10 nF]. 68. Install C21, .01 uF [marked .01 or 103 or 10 nF]. 69. Install C18, 220 pF [marked 220 or 221]. FR6 • 15...
- Page 16 79. Install C32, a 100 to 220 uF electrolytic, observe correct polarity. 80. Install C31, .01 uF (marked .01, 103, or 10 nF). 81. Install C36, 4.7 or 10 uF electrolytic, observe polarity. 82. Install C33, 100 to 220 uF electrolytic, observe polarity. FR6 • 16...
- Page 17 Brush the solder side of the board with a stiff brush to make sure that no loose wire trimmings or solder drippings (tsk tsk) are lodged between connections. FR6 • 17...
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Page 18: Testing And Alignment
TESTING, ALIGNMENT AND ADJUSTMENT To prepare the FR6 FM VHF Receiver for reliable monitoring operation, you will need these basic tools: 1. A useful 6 meter signal source. 2. Hexagonal, non-metallic coil slug alignment tool for L3. 3. Small screwdriver to adjust L4. - Page 19 6-meter transceiver should be willing to give you the test signal and extra help that you need. The FR6 is very sensitive, so operate the transceiver on low power on a simplex frequency from a distance of at least across the room.
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Page 20: Enclosure Ideas
(3) We could not decide which color you would like best! THE RAMSEY ELECTRONICS CASE, KNOB & HARDWARE OPTION Your finished receiver can be installed in a variety of enclosures of your own design and choosing. You might be planning to combine several Ramsey circuit boards in a single enclosure. -
Page 21: Troubleshooting Guide
FR6 TROUBLESHOOTING GUIDE The Ramsey FR-series FM receivers are among our most widely-used and popular kits. The circuit itself, assembly and use are "cut-and-dried." If your receiver does not work, there is probably either an error in assembly or a defective part. -
Page 22: Notes For Advanced Users
Again, please be sure that you understand your warranty, and that you understand your receiver and how to keep it working, before attempting any modifications. If you've enjoyed this kit, be sure to check out the entire Ramsey kit line. Call or write for our catalog. FR6 • 22... -
Page 23: 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 24 • Holder for PC Board/Parts: Ramsey #RTS13 • Desoldering Braid: Ramsey #RTS08 • Digital Multimeter: Ramsey #M133 Price: $5.00 Ramsey Publication No. FR6 Assembly and Instruction manual for: RAMSEY MODEL NO. FR6 6 METER FM RECEIVER KIT R6 • 24...