[Kenwood] RF Damaged Radio

Thu Jul 1 00:08:59 EDT 2004

During field day, a fellow ham turned his transmitter on at full power on 
the same band I was on , the radio I was using was on a 3 element beam 
aimed right at the offending transmitters antenna. Since then the radio 
doesn't work quite right.
The radio is a Kenwood TS-450 SAT, and the problem is that after one 
transmits with the radio even at low power settings, the AGC on the radio 
on switching back to receive mode is at maximum level. The radio is 
therefore totally deaf for several seconds every time you transmit.
I suspect that a diode that is part of the TR switching in the radio is 
damaged and leaking RF from the transmitter into the receiver.
I do have a schematic available, but before I start hunting for a blown 
component, I wanted to know if there are other known issues with this radio 
such as relays that get damaged or stuck easily..etc.
Any clues would be appreciated.
Cecil
KD5NWA 