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Originally Posted by jbeary
Hello All,
anything weak or weird. Don't know why this would sync up after it's warm but not when cold.. sync's up but barely and the AGC knocks if out when fiddled with or the channel is changed. Generally this is a resistor or capacitor issue, but like I said, I have no idea because they all test good when cold.
Thanks,
Jeff
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Could be a capacitor in the horizontal oscillator circuit. One that's drifting in value as it warms up. DO NOT use a ceramic cap as a replacement, as those do drift too much for the oscillator circuit. Use an orange drop cap or such.