Bias fixed to mode

Steve London

I am using a (new) PGXL with a non-Flex radio, using CAT control. The bias (AB/AAB) seems to be locked to the radio mode, and can not be changed from the utility or the touch screen. Is this the correct operation ?

73,

Steve, N2IC

David Decoons, wo2x

Yes. AAB on voice modes sets VDD at 52 volts and bias to 4 amps. This gives better IMD performance.

For single tone modes (CW, FT8, etc) you can enable MEffA. This will set bias to 2 amps and adjust VDD on the fly to maximize efficiency and reduce heat.

73

Dave wo2x

Mike-VA3MW

Steve, just curious, what OEM radio are you using ?

(this is not related to your question, just curious)

Steve London

FTDX101D and TS-590S

Mike-VA3MW

@Steve London

Would you mind answering the questions on this thread please.

It would really help out others.

73

https://community.flexradio.com/discussion/8028820/pgxl-and-tgxl-being-used-with-oem-hf-non-flex-radios