Ramsey Electronics FZ-146 Specifications download pdf (Page 131)

FX-146 • 131

B. Unpack and study the design of the chip, noting both ends are metallic.

C. Lightly pre-tin both PC board points.

D. Holding C75 in place across the two tinned points with tweezers, gently

touch one junction with the soldering tip. The connection should solder

easily.

E. Solder the other end and touch up the first one if necessary.

Identify and install the following components:

 TX4: C56, 10 pf.

 TX5: R29, 100 ohms (brown-black-brown).

 TX6. L11, miniature .33 uh. inductor (small green body, two orange

stripes)

 TX7. C44, .001 uf.

 TX8: C76, 15 pf.

 TX9: C82, 10 pf.

 TX10: R36, 10K (brown-black-orange).

 TX11: R110, 10K (brown-black-

orange).

 TX12: R34, 270 ohms (red-violet-

brown).

 TX13: C97, .01 uf.

 TX14: Install Q10, NE021, the

Transmit Buffer transistor. It installs

in the same way as Q3, which was installed in step DR19. Go back and

re-read the steps required when installing a transistor of this style. You

must make sure it is seated snugly against the board before soldering.

At this point, all transceiving functions except final transmitter output power

may be tested and aligned. Q10 has plenty of RF output (10 milliwatts) for a

signal that can be heard in a nearby receiver or scanner. You may test and

align the transceiver now or do so after installing the remaining transmitter

parts.

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Ramsey Electronics FZ-146 Specifications Page 131