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  5. Assembly And Instruction Manual

Ramsey Electronics FR-10 Assembly And Instruction Manual

Summary of FR-10

  • Page 1

    Fr-10 ? 28 fr-10 10 meter fm receiver kit quick reference page guide i ntroduction to the fr-10 .............. 4 circuit description ........................ 5 parts list ...................................... 6 simplified block diagram .............. 8 parts layout diagram ................... 9 fr-...

  • Page 2

    Fr-10 ? 2 ramsey transmitter kits ?? Fm-10, 25 fm stereo transmitters ?? Fm-1,2,3,4 fm wireless microphones ?? Pb-1 telephone transmitter ramsey receiver kits ?? Fr-1 fm broadcast receiver ?? Ar-1 aircraft band receiver ?? Sr-1 shortwave receiver ?? Aa-7 active antenna ?? Sc-1 shortwave converter ra...

  • Page 3: Fr-10  10 Meter

    Fr-10 ? 26 if you've enjoyed this kit, be sure to check out the entire ramsey kit line. We have a whole series of nifty synthesized vhf fm transceiver kits that not only teach state-of-the-art technology, but are fun and easy to build, too! Call or write for our catalog. Fr-10 ? 3 fr-10 10 meter fm ...

  • Page 4

    Fr-10 ? 4 introduction there's not a lot to say about using the fr-10 receiver once its been correctly built and aligned. If 10 meters is "dead" you'll hear little or nothing. If ten is "open" there will be an amazing variety of crystal- clear signals from many thousands of miles away. In the first ...

  • Page 5

    Fr-10 ? 24 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. Following is some help in case you experience dif...

  • Page 6

    Fr-10 ? 6 oscillator of u1 from drifting away from an incoming signal. This is accomplished by tuning the varactor circuit in the direction opposite the drift. The mc3359 ic has an internal oscillator controlled by the 10.24 mhz crystal. The 10.24 mhz signal is mixed with the 10.7 mhz input from u1 ...

  • Page 7

    Fr-10 ? 22 a special note to newcomers: ten meters is generally a daylight hours band. If you finish your receiver at midnight, please wait until after sunrise before expecting to hear much of anything! Receiver sensitivity your fm receiver features sensitivity under 1 uv. Radio hams constantly marv...

  • Page 8

    Fr-10 ? 8 u2, 3359 fr-10 block diagram fr-10 ? 21 alignment procedure ? 1. Make sure the power switch is off. ? 2. Connect the antenna, earphone or speaker and battery. ? 3. Turn the slug of l3 until it is even with top of coil form. ? 4. Now, turn the slug of l3 clockwise 7 turns back into the form...

  • Page 9

    Fr-10 ? 20 testing, alignment and adjustment to prepare the fr-10 fm vhf receiver for reliable monitoring operation, you will need these basic tools: ? 1. A useful 10 meter signal source. ? 2. Hexagonal, non-metallic coil slug alignment tool for l3. ? 3. Small screwdriver to adjust l4. 1. Signal sou...

  • Page 10

    Fr-10 ? 10 note concerning the audio output jack your receiver kit is supplied with a standard subminiature 2.5 mm (3/32”) audio jack, which mates with commonly available earphone plugs and adapters available at radio shack, such as 274-290 (plug) or 274-327 (adapter for 1/8” mono plug). If you pref...

  • Page 11

    Fr-10 ? 18 ? 58. Install c24, .001 uf [marked .001 or 102]. ? 59. Install c25, .001 uf [marked .001 or 102]. ? 60. Install c26, .01 uf [marked .01 or 103 or 10nf]. ? 61. Install l4, the 450 khz quadrature coil, soldering the two pins and the two mounting tabs. ? 62. Install u2, the mc3359 ic. As in ...

  • Page 12

    Fr-10 ? 12 center pins and then the two larger mechanical mounting tabs. 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 the pc board. In this case, t...

  • Page 13

    Fr-10 ? 16 ? 27. Install c12, 47 pf. ? 28. Install varactor diode d1.It looks like a transistor with just two leads. The flat side faces l3 so be sure to orient it correctly. ? 29. Install r8, 47k ohms [yellow-violet-orange]. ? 30. Install r9, 270 ohms [red-violet-brown]. ? 31. Install c13, .01 uf [...

  • Page 14

    Fr-10 ? 14 fr-10 ? 15.