Yaesu FT-8800 Problem

[Chris Nuttall]

I've got about a 7-year old FT-8800. Whenever I key the mic on 2m, it stays open. It operates normally on 70cm. I originally thought that maybe it was the button on the mic, since I've spilled Dr. Pepper on it before. However, that doesn't explain why it only happens on 2m. Has anyone ever experienced or heard of this problem?

 

[Rob Wadsworth]

Are you saying that it stays keyed down after you release the push-to-talk switch? Or; do you mean that it doesn't transmit at all on 2m - and all you hear is no change in the receive?

These radios don't use relays - I believe.
Their TX function is controlled by a diode switching circuit instead.

 

[Chris Nuttall]

Are you saying that it stays keyed down after you release the push-to-talk switch?

^ This. What is puzzling me is the fact that it is occurring only on 2m but not on 70cm. If it's not raining too badly tomorrow, I plan to do some more testing. It's bugging the crap out of me that I can't figure this out.

 

[Kris Hair]

I had a 7800 that did that when it was nearly brand new. I finally figured out that the voltage was high enough to run the radio, but low enough it was causing some issues. You might want to check your voltage and ground. Might find your problem there.

Good luck.