"james" wrote in message
...
On Thu, 05 Apr 2007 19:57:47 +0200, Giulia
wrote:

+++Hi ,
+++i have a problem with a president jackson cb ,
+++in tx there is about 100hz noise (i tx with car battery no PSU),
+++the noise there is even if carrier is unmodulted (fm and am mode)....
+++Can someone halp me ?
+++Schemtics are aviable and i can use an oscilloscope.........
+++
+++Giulia
*************

100Hz?????

That is a subaudible frequency.
How could anyone detect it without a scope?

james

The range of "normal" human hearing is 20-20,000 Hz. How is 100 Hz
"subaudible"?