Ramsey Electronics FR220 Instruction Manual - Squelch Controls
FR-220
• 17
3. TRANSISTOR COUPLING & AFC CIRCUITS, VOLUME &
SQUELCH CONTROLS
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38. Install Q2, a 2N3904 transistor. Observe correct positioning of
the flat side.
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39. Install R13, 47K ohms (yellow-violet-orange).
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40. Install C20, .001 uf (marked .001 or 102).
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41. Install R12, 1K ohms (brown-black-red).
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42. Install Q3, 2N3904 transistor.
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43. Install R10, 1 megohm (brown--black-green).
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44. Install R11, 1K ohms (brown-black-red).
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45. Install R22, 2 ohms (red-black-gold).
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46. Install C29, .01 uf (marked .01 or 103 or 10nf).
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47. Install C30, 4.7 or 10 uf electrolytic, observe correct polarity.
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48. Install R18, 18K ohms [brown-gray-orange].
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49. Install C28, .01 uf (marked .01 or 103 or 10nf).
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50. Install R19, 10K ohms [brown-black-orange].
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51. Install jumper wire, JMP2.
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52. Install C34, .1 uf (marked .1 or 104).
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53. Install R21, 47K ohms (yellow-violet-orange).
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54. Install C35, 100 to 220 uf electrolytic, observe polarity.
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55. Install R20, 270 ohms (red-violet-brown).
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56. Install Q4, 2N3904 transistor.
I4. MC3359 FM IC and ASSOCIATED COMPONENTS
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57. Install R17, 10K ohms [brown-black-orange].
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58. Install R14, 33K ohms [orange-orange-orange].
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59. Install C24, .001 uf (marked .001 or 102).