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FR-10 BLOCK DIAGRAM
U2, 3359
FR-10 ? 8
ALIGNMENT PROCEDURE
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1. Make sure the power switch is off.
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2. Connect the antenna, earphone or speaker and battery.
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3. Turn the slug of L3 until it is even with top of coil form.
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4. Now, turn the slug of L3 clockwise 7 turns back into the form.
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5. Turn the slug of L4 until it is flush with the top of the coil and
then turn it 2 turns back into the coil.
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6. Turn all three controls to the left, fully counterclockwise.
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7. Turn the power ON.
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8. Turn R2 (Volume control) until you hear some noise.
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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 25 and
35 MHz of primary interest to you.
If you are a beginner with no license or other equipment, any Ham
operator with a 10-meter transceiver should be willing to give you the
test signal and extra help that you need. The FR-10 is very sensitive, so
operate the transceiver on low power on a simplex frequency from a
distance of at least across the room. An 8" piece of wire will be a
sufficient receiving antenna for such tests. If you don't know any Hams,
visit a friendly two-way radio service center to get close to the test signal
you need! If ham radio or 10 meters is new to you and you do not have
a general coverage receiver for comparison, here's a listing of the
various band portions:
28.00 - 28.10 General class and higher CW
28.10 - 28.30 Novice & Tech CW and digital
28.30 - 28.50 Novice & Tech SSB
28.50 - 29.70 General class and higher SSB, FM, etc.
29.30 - 29.50 Amateur satellites
29.52 - 29.58 Repeater inputs
29.60
Simplex calling frequency
29.62 - 29.68 Repeater outputs - This is where you'll hear the
most action!
FR-10 ? 21
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