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During this days on my K2 with the KSB2 and KNB2 options installed a strange fault appear some time.
I am on LSB (or USB) with the FL1 OP1 filter engaged and when I switch to FL2 FL3 FL4 the receiver became mute ...
Cicling again to FL1 the receiver return to life.
To make the FL2 - FL3 - FL4 work I have to give a little shock to the radio.
I have already cheched a a big quantity of solder joint without success ... maybe a Xtal shortned to ground ?
Any idea ??
Thank you and 73,
Lorenzo IK5WWP.
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