Many thanks to Radio Tech and others with their help. I'm looking to learn more on the subject of troubleshooting the audio chain. Their post have help me bring a couple of cobras back to life that had no receive.
Now I'm stuck on a couple (cobra 25's) with no carrier no modulation. The radio receives well but no carrier on the scope or wattmeter. However when you key the mic. the bench radio gets quiet and the tx/rx light changes.
I have 10.240 on the crystal and frequency on the so-239...
Trouble shooting help
Now I'm stuck on a couple (cobra 25's) with no carrier no modulation. The radio receives well but no carrier on the scope or wattmeter. However when you key the mic. the bench radio gets quiet and the tx/rx light changes.
I have 10.240 on the crystal and frequency on the so-239...
Trouble shooting help