Alan Strawinski wrote:
Radioman wrote in :


You've just determined you have no 10.24 MHz. Make it oscillate and
try it again. I toss Cobra 19's in the trash, working or not.


I tried something else. I probed pin 13 of the PLL (Vss, ground) and found
10.17MHz present. That seems odd to me. Why would I see 10.17MHz THERE of
all places? And why is it 10.17MHz as opposed to 10.25MHz?

As far as making it oscillate goes, I tried injecting a 10.24MHz signal at
the Reference Oscilator Input (RI) and got nothing. There isn't even a
measurable output at the Reference Oscillator Output (RO) pin of the PLL
while I'm injecting one at the RI pin. I would expect there to be one
there, but I could be wrong.

I know that alot of people don't like Cobra 19's, but I still want to get
this thing working. I'm not sure why people don't like them, they're
perfectly fine radios. I don't want to give up.

lift pin 13 and see if the pll is supplying the freq....