As posted by Amsat-UK:

ARISS Switches to Ericsson Radio After experiencing Problems with the Kenwood D700

After experiencing issues with the Kenwood D700 on two consecutive school contacts, ARISS will use the Ericsson Radio on the Columbus module for ARISS contacts until problems with D700 are resolved.

According to Frank Bauer, KA3HDO, AMSAT's Vice President for Human Spaceflight Programs, "...for some reason, our signals from the Service Module Kenwood D700 radio are much diminished. Our contact

After experiencing issues with the Kenwood D700 on two consecutive
school contacts, ARISS will use the Ericsson radio on the Columbus
module for ARISS contacts until problems with the D700 are resolved.

how active is ISS on voice these days... it's been a long time since I have heard anything on 145.800
73
Terry
VE7UP