Ramsey Electronics FZ-146 Specifications download pdf (Page 127)

FX-146 • 127

6. Press the microphone button: the TX LED should light, and the

receiver should be silenced.

7. Touch a wire from ground to pin 3 of the Packet I/O jack. Do the

same with any resistor that is 47K or lower. Either way, you should

get the same results as in Step 6.

8. Disconnect the DC Power.

OPTIONAL:

Interested builders might wish to verify microphone amplifier operation at PC

board point "PL" before proceeding, but such a test is not essential at this

point. Simply connect a utility test amp to "PL", press the mike button and

talk!

Assembly Stage "TC": Transmitter Coil & RF Choke Preparation

A few parts need handmade preparation before installation in the transmitter

RF stages of your transceiver. We recommend that you get them ready for

installation before wiring the Driver and Final stages. If you prefer to proceed

with those stages, winding coils as you go, that's fine, too, as long as you

realize that all coil making details are provided in this section.

The wire used for L9 and L19 is the smaller gauge tinned "bus" wire supplied

with your kit. If you mess up, you can get a whole 50' spool of it from Radio

Shack (278-1341).

 TC1: RF CHOKES (two identical units required for L9 and L19):

Examine the two cylindrical ferrite cores provided in the kit. Notice that

there are six holes at either end of these cylinder shaped units,

arranged in two groups of three. Cut 6" of bus wire and following the

2.5 TURN

1.5 TURN

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Ramsey Electronics FZ-146 Specifications Page 127