6 meter fm receiver kit ramsey electronics model no. Fr6 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...
Fr6 • 2 ramsey transmitter kits · fm100b professional fm stereo transmitter · fm25b synthesized stereo transmitter ·am1, am25 am transmitters · tv6 television transmitter ramsey receiver kits · fr1 fm broadcast receiver · ar1 aircraft band receiver · sr2 shortwave receiver · aa7 active antenna · sc...
Fr6 • 3 fr6 6 meter fm receiver kit ramsey publication no. Mfr6 price $5.00 table of contents i ntroduction to the fr6 .................. 4 circuit description ......................... 5 parts list ........................................ 6 simplified block diagram .............. 8 parts layout dia...
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 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 ...
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% excellent and you could still have 2 or 3 cold solder points or solder bridges. Since this circuit is more sophisticated than a direct-conversion hf receiver o...
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 coil, permits adjustment of the 90-degree voltage-current phasing ("quadrature") of fl2's output to the fm detector demodulator (pin 8 of the mc3359). Par...
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 .001 or 102 or 1 nf] (c7,8,20,23,24,25) 8 .01 uf [marked .01 or 103 or 10 nf] (c13,16,17,21,26,28,29,31) 1 .1 uf [marked .1 or 104] (c34) 1 1.0 uf electrolytic (c27) 3 4...
Fr6 • 8 u2, 3359 fr6 block diagram.
Fr6 • 9 fr6 parts layout diagram.
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, we install parts in physical relationship to each other, so there's minimal chance of inserting wires into wrong holes. Second, whenever possible, we install in a...
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 neat installation. All "directions" on the pc board (ie: right, left, above, below and so forth) assume orientation of your board as shown in the parts ...
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 heat to make 8 clean connections, but do be sure to correctly orient the end marked by a band, dot, or notch. Before soldering, make sure that the ic or socket is ...
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 preamplifier, and the sa602 mixer-oscillator, including the varactor tuning circuit. The work you have done so far has actually formed a simple receiver cap...
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. ❒ 53. Install c34, .1 uf [marked .1 or 104]. ❒ 54. Install r21, 47k ohms [yellow-violet-orange]. ❒ 55. Install c35, 100 to 220 uf electrolytic, observe po...
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 its holes as far as it will go, and make good solder connections. ❒ 72. Install fl2, the 450 khz filter. Its three leads are delicate and fit in only on...
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 on the pc board. ❒ 84. The battery bracket may be attached in a variety of ways. A wire jumper can be passed through the two holes on the pc board, then ...
Fr6 • 18 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. 1. Signal source: this s...
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. Further alignment now consists of adjusting the oscillator coil l3 to permit the tuning control (r3) to cover the 5 mhz. Segment between 50 and 54 mhz of primary inter...
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 point to get the + dc voltage needed for the anode (longer lead) of the led. Plan where and how you wish to install the led in your enclosure. Locatin...
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 board, plus speaker, with room for various refinements you might like to add. Fr6 troubleshooting guide the ramsey fr-series fm receivers are among ou...
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 or real need for customization or other modifications. These receivers do what they are intended to do at the lowest price that we are aware of for a tu...
Fr6 • 23 the ramsey kit warranty please read carefully before calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All ramsey kits will work if assembled ...
R6 • 24 fr6 6 meter fm receiver kit quick reference page guide introduction to the fr6 ..................... 4 circuit description ............................. 5 parts list ........................................... 6 simplified block diagram .................. 8 parts layout diagram ................
