[Elecraft] BPF Bypass

[Devin Butterfield]

Hi,

I have a KX3 and so far I’m very pleased. Very nice design and good build.

I would like to use this radio for ALE, which requires cross-band scanning. This mode is used only for initial detection. If I use the KX3 as is, when changing bands I can clearly hear relays switching, which I think is in the BPF circuit (please correct me if I’m wrong).

Looking at the schematic it appears the BPF can be bypassed by asserting the BPF_BYPASS signal, but it isn’t clear from the user manual or CAT programming manual what mode in the KX3 achieves this effect.

Any ideas how to get the KX3 to bypass the BPFs?

Thanks, Devin / KD6DRS