Ramsey Electronics FR-10 Assembly And Instruction Manual page 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, the control lugs are wired to
the PC board using your own insulated hookup wire, kept as short as
possible for neat installation.
FURTHER COMPONENT INSTALLATION
All "directions" on the PC board (i.e.: right, left, above, below and so
forth) assume orientation of your board as shown in the parts layout
diagram. Therefore the rear of the board (connectors) is the lower end,
and the front (controls) is the upper end.
1. ANTENNA INPUT AND TUNED RF PREAMPLIFIER
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5. Install C1, 100 pf disc capacitor [marked 100 or 101].
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6. Install C2, 22 pf.
? 7. Install C3, 56 pf.
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8. Install L1, .33 uH inductor. L1 resembles a resistor body with
two orange stripes painted on it.
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9. Install C4, 56 pf.
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10. Install L2, the other .33 uH coil just like L1 above.
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11. Install C5, 10 pf.
? 12. Clearly identify Q1, the 2SC2498 or 2570 transistor. Do not
confuse it with the other transistors supplied. Position Q1 as shown
on the PC board layout, with the flat side facing to the right, toward
the middle of the board. Press the transistor snugly into the PC
board so that only a minimum amount of wire lead is exposed above
the board. When soldering, don't be afraid to use enough heat to
make good clean connections.
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13. Install R4, 47K, just to the left of Q1. [yellow-violet-orange].
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14. Install C6, 100 pf [marked 100 or 101].
FR-10 ? 12
3. TRANSISTOR COUPLING & AFC CIRCUITS, VOLUME &
SQUELCH CONTROLS
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37. Install Q2, a 2N3904 transistor. Observe correct positioning of
the flat side.
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38. Install R13, 47K ohms [yellow-violet-orange].
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39. Install C20, .001 uf [marked .001 or 102].
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40. Install R12, 1K ohms [brown-black-red].
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41. Install Q3, 2N3904 transistor.
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42. Install R10, 1 megohm [brown-black-green].
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43. Install R11, 1K ohms [brown-black-red].
? 44. Install R22, 2 ohms [red-black-gold].
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45. Install C29, .01 uf [marked .01 or 103 or 10nf].
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46. Install C30, 4.7 or 10 uf electrolytic, observe correct polarity.
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47. Install R18, 18K ohms. [brown-gray-orange]
? 48. Install C28, .01 uf [marked .01 or 103 or 10nf].
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49. Install R19, 10K ohms [brown-black-orange].
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50. Install jumper wire, JMP2.
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51. Install C34, .1 uf [marked .1 or 104].
? 52. Install R21, 47K ohms [yellow-violet-orange].
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53. Install C35, 100 to 220 uf electrolytic, observe polarity.
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54. Install R20, 270 ohms [red-violet-brown].
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55. Install Q4, 2N3904 transistor.
4. MC3359 FM IC and ASSOCIATED COMPONENTS
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56. Install R17, 10K ohms [brown-black-orange].
? 57. Install R14, 33K ohms [orange-orange-orange].
FR-10 ? 17