The recieve is great, transmit was great also, now its not getting out at all. im using a "hg m84w" cobra mike and some work was done at a local shop. whats the best way to work out the componant at fault. the mikes wiring is tight still. My father used it in his dump truck for a year. he never got a great match swr so it may be a final trans burnt out. a erf2030/ekl/0930e. anything i should check out first?

I noticed finals are mosfet they will take alot of punishment from a bad antenna system match "high SWRs If the meter is moving at all on keyup i would not suspect finals. Finals seldom degrade in power they just quit. The driver for the Final transistor another transistor can produce low transmit power with a failed Final.

You say it is in a Dumptruck lots of vibration and dust. It could be cold solder joints..cracks in solder and corrsion in cracks reducing voltage to components. Dust or dirt in trimmer pots which are varible resistors.

Open case on solder side (top of radio)and tighten phillips head screws dont over tighten these boards can be fragile. After opening that side you will understand the dust issue.

I suggest checking the easy stuff first.

1. check power leads
2. Swap mic.
3. check coax connections.
4. check coax for damage.
5. swap antenna they can have broken wires.
6. make sure the plastic insulator on top that antenna is inserted in is on top and coax side is contacting antenna mount for ground.