Ramsey Electronics FX Series Manual page 126

TX51. Press (key) the transmit button and alternately adjust C82, C84 and
C74 with a non-metallic alignment tool for maximum RF output indicated on
the meter. If you are using a voltmeter connected to the resistor test point,
you will typically see about 12 to 15 volts when connected to a good 50 ohm
load. Keep these key-down tests as brief as possible.
TX52. If you are observing at least 3 watts of RF output, transmitter tuneup
is completed. Spread coils L13 and L16 on the main board and L12 and L22
on the low pass board for maximum RF output. These coils are purposefully
wound with a little too much inductance, so that they can be easily "peaked"
by some spreading. This is probably one of the most important steps to get
the most RF out of your rig.
TX53. Adjust Modulation control R46 by listening on another receiver or
scanner and simply adjust for best sounding audio. See Test Procedure,
Step 8, regarding FM Deviation.
Remember that indicated RF output also depends on the accuracy of the
wattmeter and correct DC supply voltage. Our lab measurements
consistently show 3 watts or better. If your application demands significantly
more RF output, your FX-223 transceiver will drive the Ramsey PA-220
booster amp (factory assembled with receiver pre-amp) to its maximum
rated outputs in the 25 to 30 watt range.
TX54. Replace the dummy load with a well designed 220 MHz antenna and
start enjoying the FM transceiver that you built yourself!
IMPORTANT:
It is your responsibility to know what band privileges are granted by
your Amateur Radio License and how to program the frequency
synthesizer correctly within the 222.00 to 225.00 MHz operating range
of the 2 Meter Amateur Band. A proper license is required for
transmitting in this band. Other FCC licensing is required for operation
of this equipment on frequencies outside the Amateur Band. It is illegal
for licensed amateurs or other persons to transmit on frequencies for
which they are not properly licensed.
RAMSEY ELECTRONICS, INC.