I have made some rough measurments and found the filter to be about 1600 to 1700 Hz wide.? If one wants to just the digital then the BFO frequency can be moved about 200 to 300 Hz to get the power up at the? higher audio frequencies.
On Thu, May 24, 2018 at 5:23 PM, Tim Gorman <tgorman2@...> wrote:
This is because of how narrow the SSB filter is. Once you begin to move
out of the passband your power output will drop. The filter in the
ubitx is pretty narrow. It's not surprising you see a drop-off after
1600hz.
tim ab0wr
On Thu, 24 May 2018 10:57:27 -0700
"Robbie Robertson" <robbie.robertson@...> wrote:
> I'm new to uBITX, but used to operating digital modes (including
> FT8), but I'm not sure if what I'm seeing is a fault, or normal for
> the uBITX... I'm using WSJT-X, and when I TX on the lower end of the
> 'spectrum' I get a much higher power output that the higher end
> (sorry I haven't got a power meter, but I can see the current being
> drawn from the power supply changing, and also the signal meter on my
> FT767 with no antenna attached). This is strangely, the complete
> opposite I get when operating using the FT767 (i.e. high power at the
> higher end of the audio range).
>
> Has anyone else experienced this,, or has a view on how to address it?
>
