Ramsey Electronics COMPUTEMP CT255 Manual de Instruções

FR6 • 1 6 METER FM RECEIVER KIT Ramsey Electronics Model No. FR6 Check out the 6 meter action with this simple and fun to bu

FR6 • 10

FR6 • 11 RAMSEY “Learn-As-You-Build” KIT ASSEMBLY: We have a twofold "strategy" for the order of the following kit assembly steps. First,

FR6 • 12 the PC board. In this case, the control lugs are wired to the PC board using your own insulated hookup wire, kept as short as possible for ne

FR6 • 13 improper socket insertion than from soldering heat damage to IC's. Even if this is your first IC, don't be afraid to use enough hea

FR6 • 14 ❒ 37. Install jumper JMP1. ❒ 38. Install jumper JMP3. PROGRESS SUMMARY So far, you have wired the tuned input from the antenna, the RF

FR6 • 15 ❒ 50. Install C28, .01 uF [marked .01, 103, or 10 nF]. ❒ 51. Install R19, 10K ohms [brown-black-orange] ❒ 52. Install jumper wire, JMP2. ❒ 5

FR6 • 16 ❒ 70. Install C19, 22 pF. ❒ 71. Install Y1, the 10.24 MHz. crystal. No special procedure is required. Simply press the crystal firmly into

FR6 • 17 ❒ 83. Install the battery snap terminal in the two holes below S1, making sure that the positive (red) lead is inserted into the (+) hole o

FR6 • 18 TESTING, ALIGNMENT AND ADJUSTMENT To prepare the FR6 FM VHF Receiver for reliable monitoring operation, you will need these basic tools:

FR6 • 19  7. Turn the power ON.  8. Turn R2 (Volume control) until you hear some noise.  9. Adjust L4 for maximum noise in the speaker.

FR6 • 2 RAMSEY TRANSMITTER KITS · FM100B Professional FM Stereo Transmitter · FM25B Synthesized Stereo Transmitter ·AM1,

FR6 • 20 Study the PC traces between the positive battery supply wire and the on-off switch. The unused connectors on top of your switch are an ideal

FR6 • 21 suited for Ramsey amateur kit boards is Radio Shack No. 270-253A. This metal utility cabinet can accommodate both a receiver and transmitter

FR6 • 22 SOME NOTES FOR ADVANCED USERS Unlike Ramsey HF receivers and transmitters, the FR-series of VHF receivers do not offer much PC board space

FR6 • 23 The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting th

FR6 • 24 FR6 6 Meter FM Receiver Kit Quick Reference Page Guide Introduction to the FR6 ... 4 Circuit Description ...

FR6 • 3 FR6 6 METER FM RECEIVER KIT Ramsey Publication No. MFR6 Price $5.00 TABLE OF CONTENTS Introduction to the FR6 ... 4 Circuit

FR6 • 4 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

FR6 • 5 BUILDING YOUR FR6 KIT There are just over 200 solder connections on the FR6 printed circuit board. That means your work could be 99% excel

FR6 • 6 practical level for speaker or headphone operation. Pin 16 of U2 will ground the input of U3 when the squelch is closed. L4, a 450 KHz IF c

FR6 • 7  4 62 pF (C3,4,9,10)  4 100 pF [marked 100, 101, or 101K] (C6,11,12,22)  1 220 pF [marked 220 or 221] (C18)  6 .001 uF [marked

FR6 • 8 U2, 3359 FR6 BLOCK DIAGRAM

FR6 • 9 FR6 PARTS LAYOUT DIAGRAM