Ramsey Electronics FR6 manual MC3359 FM IC and Associated Components

❒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 polarity.

❒56. Install R20, 270 ohms [red-violet-brown].

❒57. Install Q4, 2N3904 transistor.

4. MC3359 FM IC and ASSOCIATED COMPONENTS

❒58. Install R17, 10K ohms [brown-black-orange].

❒59. Install R14, 33K ohms [orange-orange-orange].

❒60. Install C24, .001 uF [marked .001, 102, or 1 nF].

❒61. Install C25, .001 uF [marked .001, 102, or 1 nF].

❒62. Install C26, .01 uF [marked .01, 103, 10 nF].

❒63. Install L4, the 455 KHz quadrature coil [marked LB53303], soldering the two pins and the two mounting tabs.

❒64. Installation of MC3359 IC. As in the case of the NE602 IC, you could choose to install an 18-pin IC socket rather than soldering the IC directly. Re-read the discussion of IC sockets offered for the installation of U1.

Larger IC's such as the MC3359 require considerably more care in socket insertion. Notice that the end of the IC marked by a band, dot, or notch must be oriented correctly as shown on the parts layout diagram. Solder each of the 18 connections carefully. Make sure you have good lighting as well as good technique to make sure that no solder "bridges" flow between the connections.

❒65. Install C22, 100 pF (marked 100, 101, or 101K).

❒66. Install C16, .01 uF [marked .01 or 103 or 10 nF].

❒67. Install C17, .01 uF [marked .01 or 103 or 10 nF].

❒68. Install C21, .01 uF [marked .01 or 103 or 10 nF].

❒69. Install C18, 220 pF [marked 220 or 221].

FR6 • 15