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(DC-DC converter oscillators, CMOS RF switches). In the unlikely event that a birdie interferes with operation,
try CW reverse (MENU:ALT MD), or auto-notch (APF- AN switch, SSB mode only).
§ Opposite-sideband images heard: Opposite-sideband suppression is typically 50-60 dB. If images appear too
high in amplitude, Receive Opposite Sideband suppression may have to be adjusted (normally done at the
factory; see pg. 39).
§ “Frying pan” or buzzing sound in headphones: Headphones may not be plugged in all the way.
§ Mobile installation noise: If the 12 V DC accessory jack in a vehicle causes interference to the KX2’s
receiver, improve filtering of the DC supply.
§ Low-level signals are heard that don’t change as the VFO is rotated: It’s possible for extremely strong
signals to create audible artifacts, due to AM detection at the mixer, that are not affected by tuning the VFO. If
this occurs, first try turning off the preamp. If that doesn’t suffice, turn on the attenuator. If the source of such
signals is a nearby transmitter (such as at Field Day), reorient or move antennas, or use an external band-pass
filter.
§ KX2 VFO signal is heard in a nearby receiver: A receiver whose antenna is in very close proximity to the
KX2’s may pick up the KX2’s VFO signal when both are set to about the same frequency (+/- 8 kHz). Try
separating or reorienting the antennas. If that isn’t possible, try turning on the preamp and/or attenuator at each
radio. This will often improve isolation between the local oscillator and the antenna jack.
§ Internal speaker distortion at high volume: The KX2’s small internal speaker is not intended for use in high-
noise environments, such as in a noisy vehicle or outdoors in high winds. If audible artifacts occur, reduce AF
gain or switch to headphones or an external speaker. (Stereo headphones or dual external speakers will allow
the use of audio effects and dual watch.)
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