Ramsey Electronics FX Series Manual page 112

M18. Install Q11, NPN transistor type 2N3904. Be sure to orient flat side
as shown.
M19. Identify and install R46, the yellow color modulation control trimmer
potentiometer. It differs from trimmer capacitors by having three terminals.
Simply place it in position and solder all three points.
NOTE: The remaining three transistors used in this section are PNP types,
2N3906 or similar, marked 228256. It is essential to use the correct transistor
type for Q12, Q13, Q14.
M20. Install Q12, PNP transistor type 228256. Orient flat side as shown.
M21. Similarly, install Q13, PNP type 228256.
M22. Install Q14, PNP type 228256. Install the following additional parts:
M23: R60, near Q12, 10K (brown-black-orange).
M24: R62, also 10K (brown-black-orange).
M25: R111, near Q13, 4.7K (yellow-violet-red).
M26: R40, 100K (brown-black-yellow).
M27: R63, 470 ohms (yellow-violet-brown).
M28: R64, also 470 ohms (yellow-violet-brown).
M29: R112, 4.7K (yellow-violet-red).
M30: R39, near Q11, 47K (yellow-violet-orange).
M31: Install diode D11, 1N914/1N4148. Orient the banded end as shown.
M32: Similarly, install diode D12, another 1N914/1N4148.
IMPORTANT: The following parts are located in areas of the PC board that
have already been assembled. If the ham in you pursued an assembly
sequence different from these step-by-step directions, you may already have
soldered in these parts. If so, no harm is done. Be certain now, though, that
the following are installed:
M33: R21, 470 ohms (yellow-violet-brown).
M34a: PIN diode D2, type BA482, near R21. BA482 PIN diodes have an
orange body, with a red cathode band. (D2 grounds the receiver input
during transmit.)
M34b: PIN diode D7, also type BA482, which passes RF to the antenna
during transmit.
M35: R107, near Y1, 10K (brown-black-orange).