What is a common repeater frequency offset in the 70 cm band?

In the 70 cm band, which ranges from 420 to 450 MHz, a common repeater frequency offset is typically plus or minus 600 kHz. This means that when you’re transmitting to a repeater for the purpose of communicating, your signal will be on a frequency that is either 600 kHz higher or 600 kHz lower than the frequency at which the repeater is receiving.

Most repeaters in the 70 cm band use a standard offset to separate the input (user) frequency from the output (repeater) frequency, which helps to avoid interference between different communications. The 600 kHz offset is practical because it provides enough spacing to allow effective operation without encroaching on adjacent channels.

While other offsets may exist or be permitted in certain circumstances, the 600 kHz offset is widely recognized as the standard for the 70 cm band and is crucial for maintaining clear and effective communications among amateur radio operators.