Radio Make and Model: Uniden PC78Elite
PCB Number: PA-371BA (?Only number on the board not assigned to a component?)
PLL Number: 823ACA or D2816CP (Not sure which is the number needed)
Test gear available: Anything and everything but only readily available is a DVM and Agilent N5230C Network Analyzer
Symptoms: No RX at all. No static. Has loud audio as verified through WX stations and even some interference of a local radio station 1240AM while testing Q9 and surrounding components.
What is working: Everything else works. External speaker, PA, WX, TX, lighting, etc.
What has been tried: Tested microphone, tested some voltage along the RX path but not sure what all voltages should be. Tested voltages of audio amp, all good. Tried a few different antenna as well as co-ax.
Did it suddenly happen ?: Not sure, radio was set on very low volume for a few months. Tried to use CB and all was gone!
Anything else that may be of help?: Everything works great except RX. I bought a new one for my rig and was less than 20 ft away and couldn't get any RX in the Uniden. Wife spoke into Uniden and I can RX on my Galaxy 959 in my vehicle. So the Uniden transmits just fine. Again, no static. FET1 measures 13V across the two outer legs and FET2 measures around 8V. I have a Cobra 29 LTD service manual and schematics and some of the voltages in the service manual don't match 100% with what I've been reading, which is why I am here now.