In article , Drifter
wrote:

I understand that the 1530 must be used with a rotor,to get the best
results, correct me if i'm wrong. I have not much room over here, so
i'm curious how it performs under the roof?

It has more to do with the incoming signal to the antenna. The lower
frequencies look more like a signal point source so then the antenna
pattern has an appreciable effect on the received signal strength.
Certainly you will see the loop null on a AMBCB daytime signal and
chances are you will also at night depending on where the signal is
coming from because at that time you could have either or both sky wave
and ground wave.

The smaller the loop size relative to the received wavelength the
better defined the directional pattern.

For SW the higher the frequency the more the signal energy is scattered
by the ionosphere so again the antenna pattern is effectively less
defined. Some people report small loop directional characteristics are
evident up to around 5 MHz. I have had a small loop of 20 foot
circumference showing a null at 5 MHz myself. I expect that a smaller 1
meter loop might show a null up to 10 MHz but a null in the pattern is
a lot less likely higher in frequency than that.

Well, I keep talking about nulls because the loop pattern response is
very broad and you are only likely to notice the null in the pattern.

--
Telamon
Ventura, California