transponder not working

"buttman" wrote in message
ups.com...

ident light was not blinking, but some of these planes have a real dim
ident light and the sun was behind us.

Also, we were at about 3000 feet and just south of Modesto. I don't
think radar coverage was the issue.

Remember that the light should respond to calls made from other
TCAS-equipped aircraft. If you think there should have been sufficient
airline traffic ovehead to trigger the light, you might want to check the
transponder.

I just upgraded to a solid state transponder after years of troubleshooting
intermittent problems in my KT-76A (including bench checks, antenna
cleaning, mode-c replacements) and the transition to solid state seemed to
have fixed the problem. To answer the original post, during all this time, I
called various ATC facilities to check my mode C with no pushback from them.

Marco