: Thursday, April 09, 2009 5:17 AM
Subject: Re: [Elecraft] K2 U10C Oscillating
David,
The LMC660 op amp can have a tendency to oscillate when driving a
capacitive load (see the LMC660 datasheet) although it is normally
stable in the K2.
Before replacing it, try the following steps - check
David,
The LMC660 op amp can have a tendency to oscillate when driving a
capacitive load (see the LMC660 datasheet) although it is normally
stable in the K2.
Before replacing it, try the following steps - check after each one and
stop if no oscillation.
1) Flush trim the leads of U10 and the
On my K2 (#3014) I hear signals and noises while tuning across 160m with the
antenna disconnected. The worst is a strong but unstable signal that moves from
about 1850 kHz to about 1910 kHz during about 15 minutes after I switch on the
radio. I accidentally traced the signal to U10C on the
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