[Elecraft] [KX3] Question: KX3 and K3 Exclusive-Or ?

[Holger Schurig]

Using the menu entry PREAMP, you can actually select 10 dB, 20 dB or
30 dB. According to the manual, 30 dB is the default for 6m.

The 10 dB preamp is also the isolation amp.

The 20 dB preamp has a better noise figure than the 20 dB one. The "30
db" preamp is just the concatenation of the two preamps.

If you select either the 10 dB preamp directly (or implicitly via the
30 dB menu setting), then the drawn current increases a bit.