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Just for the record did you happen to turn the RF Power all the way clockwise? If so you may want to turn it all the way counterclockwise as this would be a better place to make measurements as long as there is at least a couple of watts on the meter and it would also let all of us know if the power control even controls power?

The channels or frequency bouncing around is most likely the infamous " Switch contact bounce " RCI could make that go away with higher quality switches but it has been an issue with the 2900 series radios for as long as I can remember, you do get lucky and find 2900 series radio that doesn't exhibit that issue but it is common it may also be that it's not switch contact bounce?. Sometimes if you just slow down how fast twirl the channel knob it's not so bad I have worked on literally hundreds of these and have found this issue in at least half of the radios it's one of the first things I check for to see if it's an issue. Now if your problem persists you may have issues in the regulator/modulator circuit and it was not exactly clear, did you say you tried to hear the radio on your mobile outside but didn't really elaborate on what the results of that did you see signal on the meter in the car when you wife keyed 2990 up and didn't hear her talk or was there some sign of audio coming from her talking it would help to know. There is much that could cause you issues we just need some test

<blockquote data-quote="OldTech03" data-source="post: 621672" data-attributes="member: 51291">Just for the record did you happen to turn the RF Power all the way clockwise? If so you may want to turn it all the way counterclockwise as this would be a better place to make measurements as long as there is at least a couple of watts on the meter and it would also let all of us know if the power control even controls power?The channels or frequency bouncing around is most likely the infamous &quot; Switch contact bounce &quot; RCI could make that go away with higher quality switches but it has been an issue with the 2900 series radios for as long as I can remember, you do get lucky and find 2900 series radio that doesn&#039;t exhibit that issue but it is common it may also be that it&#039;s not switch contact bounce?. Sometimes if you just slow down how fast twirl the channel knob it&#039;s not so bad I have worked on literally hundreds of these and have found this issue in at least half of the radios it&#039;s one of the first things I check for to see if it&#039;s an issue. Now if your problem persists you may have issues in the regulator/modulator circuit and it was not exactly clear, did you say you tried to hear the radio on your mobile outside but didn&#039;t really elaborate on what the results of that did you see signal on the meter in the car when you wife keyed 2990 up and didn&#039;t hear her talk or was there some sign of audio coming from her talking it would help to know. There is much that could cause you issues we just need some test</blockquote>

[QUOTE="OldTech03, post: 621672, member: 51291"] Just for the record did you happen to turn the RF Power all the way clockwise? If so you may want to turn it all the way counterclockwise as this would be a better place to make measurements as long as there is at least a couple of watts on the meter and it would also let all of us know if the power control even controls power? The channels or frequency bouncing around is most likely the infamous " Switch contact bounce " RCI could make that go away with higher quality switches but it has been an issue with the 2900 series radios for as long as I can remember, you do get lucky and find 2900 series radio that doesn't exhibit that issue but it is common it may also be that it's not switch contact bounce?. Sometimes if you just slow down how fast twirl the channel knob it's not so bad I have worked on literally hundreds of these and have found this issue in at least half of the radios it's one of the first things I check for to see if it's an issue. Now if your problem persists you may have issues in the regulator/modulator circuit and it was not exactly clear, did you say you tried to hear the radio on your mobile outside but didn't really elaborate on what the results of that did you see signal on the meter in the car when you wife keyed 2990 up and didn't hear her talk or was there some sign of audio coming from her talking it would help to know. There is much that could cause you issues we just need some test [/QUOTE]

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