Icom IC-735 Common Questions page 4

Remarks:
Symptom:
Probable
Cause:
Cure:
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�1997 ICOM America, Inc. The ICOM logo is a registered trademark of ICOM, Inc. All ICOM radios significantly exceed FCC
regulations limiting spurious emissions. All stated specifications are subject to change without notice or obligation.
Some filters are better than others so some test selection may be
needed to satisfactorily alleviate the problem. The better-performing
(but more expensive) FL-80 filter can be substituted for the FL-30.
"Chirp" in CW operation.
1) Low power supply voltage in TX. 2) Astron power supply needs
additional RF decoupling. 3) Early production IC-735 needs factory
update.
Check power supply voltage at pin 7 of either accessory jack in TX
mode. It should not vary excessively from RX standby voltage or
drop below 12 volts. If an Astron power supply is being used with
radio, install additional RF decoupling capacitors to its output
terminals. If the IC-735 is an early production unit, it may need a
factory update to prevent chirp. Call Icom Technical Support for
update information.
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