Ramsey Electronics FR6 User Manual download pdf (Page 13)

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 perfectly flat

against the top of the PC board.

❒ 19. Install U1, the SA602 in accord with the preceding directions.

❒ 20. Install the FL1 ceramic filter. This component looks like a capacitor

with 3 leads and may be installed either way.

❒ 21. Install jumper wire JMP4. Use a scrap component lead wire bent into

a small loop that connects the two PC board holes. Jumpers act as

"bridges" over PC board traces underneath.

❒ 22. Install C8, .001 uF [marked .001, 102, or 1 nF].

❒ 23. Install C10, 62 pF.

❒ 24. Install R7, 10K [brown-black-orange].

❒ 25. Install C9, 62 pF.

❒ 26. Install C11, 100 pF [marked 100, 101, or 101K].

❒ 27. Installation of L3. It is important that the body of this coil be snug

against the PC board for mechanical stability, which directly affects the

frequency stability of the receiver. Make good, solid solder connections!

❒ 28. Install C12, 100 pF [marked 100, 101, or 101K].

❒ 29. Install varactor diode D1, marked BB505. It is important to orient this

part as shown in the parts layout diagram.

❒ 31. Install R8, 47K ohms [yellow-violet-orange].

❒ 32. Install R9, 270 ohms [red-violet-brown].

❒ 33. Install C13, .01 uF (marked .01 or 103 or 10 nF).

❒ 34. Installation of C14. This is the first of the electrolytic or "polarized"

capacitors that you will install. This means these capacitors have a

positive (+) and negative (-) side and therefore a right way and wrong way

of installation. Ordinarily, only the negative side is marked on the capacitor

body, a dark band with the (-) sign clearly shown. The value of C14 is not

critical and may be any value from 100 to 220 uF.

❒ 35. Install C14, 100 to 220 uF, observing correct polarity.

❒ 36. Install C15, 4.7 or 10 uF, observing correct polarity.

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Ramsey Electronics FR6 User Manual Page 13