Freq. is 15.60000  Mhz

TCXO unit voor de TS-480/590sg

It all depends on your style of operating, frequency bands and modes you use. If you are a casual CW or SSB operator you would probably gain nothing from installing the SO-3 TCXO (or equivalent). My main operating modes are digital and I prefer the added stability. It all depends on your operational requirements.

Here are the specs for the TS-590SG. In most cases the rig surpasses these specs.

Out of the box, the specs for the TS-590SG frequency stability are +/- 5 ppm
@3.5 MHz +/-17.5 Hz
@7 MHz +/- 35 Hz
@14 MHz +/- 70 Hz
@28 MHz +/- 140 Hz
@54 MHz +/- 270 Hz

With the SO-3 the specs for frequency stability are +/- 0.5 ppm
@3.5 MHz +/- 1.75 Hz
@7 MHz +/- 3.5 Hz
@14 MHz +/- 7 Hz
@28 MHz +/- 14 Hz
@54 MHz +/- 27 Hz