Higher highs and lower lows on MW TX antenna

[OgreVorbis]

Compared with a MW broadcasting station, my antenna produces higher peaks and lower troughs at all times and all listening locations. Why is this? Does this have to do with angle of radiation? It is interesting that during the peaks, it's actually better than a number of MW stations at the same distance, but it dips so deep that it can't be heard sometimes. Would making the vertical section longer improve this? I always thought that angle of radiation simply has to do with the distance covered, but maybe it's more than that. If it's not angle of radiation then what is it?

[Stretchyman]

Via Groundwave or Skywave? Day or night? What antenna type and dimensions?

Str.

[Brian]

Too little information.
Are you comparing SW with MW?

[OgreVorbis]

Via Groundwave or Skywave? Day or night? What antenna type and dimensions?

Str.

Skywave only. Night. Antenna is 1/4 wave inverted L 60-70 ft tall, the rest horizontal.

Too little information.
Are you comparing SW with MW?

No, I'm comparing MW with MW. I wouldn't compare with SW cause that would be different.

Either way, it's not really a problem, but I find it very interesting. It's not what I would expect.

[Josh]

Perhaps modulation schemes are different per station?

[Stretchyman]

As the fades are due to fluctuations in the D layer I'm surmising that a shallower angle of inclination may help as the signal is going to spend less time in the layer? Just guessing but a worthwhile experiment. This is what those online SDRs are for! Maybe try NVIS to see the difference too...

I now have a local SDR at 30 miles to the west on the far side of a hill and want to see how I can improve my ground wave on 1.5 MHz. Fortunately no ionosphere to deal with!

What kind of distance are you getting on  a single hop at night? What's your power?

Str.