$.02:
I am fighting my own urban QRM issues. For me, 20dB was Too Much, 10dB
seems to work. Haven't recently tried less.
I do have to make sure to turn RF Gain down enough that I can use the
AF Vol to keep the input in the expected range of my laptop/wsjtx
Good luck!
Scott
AD6YT
On Thu, Feb 20, 2020 at 9:24 AM John Newgas wrote:
>
> Setting up the KX3 Pre-Amp for FT8/JS8Call when receiving ?
> I use my KX3 mainly for JS8Call and FT8 on 20 and 40m.Because I live in
> London, I have a poor antenna and quite a lot of QRM around me.
>
> I had thought that my KX3 might be a bit deaf on receive as my 10W signal can
> be heard by many stations which I can’t hear. Before making and erecting a
> new antenna, I thought I would re-check all the settings I use … Attenuator
> OFF, RF Gain set to 0 etc.
>
> I then started to think about the receive pre-amp which is normally OFF.
> Setting ti to 10 db Gain and turning it on, did seem to improve things.
>
> I was wondering how with Digimodes to work out the best level for Pre-Amp
> gain. The traditional "listening for signals in noise" doesn’t really work
> as the detection levels are below hearing. Any good suggestions for setting
> this optimally when you have a short and poor antenna ?
>
> John G7LTQ
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