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If the VCO voltage is too high or too low; it will allow the PLL to unlock.
There is an alignment page for this radio on CB Tricks. Look up where it says 'VCO voltage'. It will tell you where to connect your voltmeter/DVM to and what channel to put the radio on for the test.

http://www.cbtricks.com/radios/realistic/trc_448/graphics/realistic_trc_448_sm.pdf

[QUOTE="Robb, post: 379312, member: 8446"] If the VCO voltage is too high or too low; it will allow the PLL to unlock. There is an alignment page for this radio on CB Tricks. Look up where it says 'VCO voltage'. It will tell you where to connect your voltmeter/DVM to and what channel to put the radio on for the test. [url]http://www.cbtricks.com/radios/realistic/trc_448/graphics/realistic_trc_448_sm.pdf[/url] [/QUOTE]

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