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help ID'ing midday AM from past couple days?

P

pianoplayer88key

Hi all...

I noticed the AM band has been active in the middle of the day recently. Therefore, I recorded clips from several signals the last couple days, and would appreciate help in identifying them. I am within 1/2 mile of 32°45'40"N 116°56'50"W, so hopefully that info as well as programming in the recordings should be able to aid in identification.
There are a few stations that I already know what they are, and there are a couple others that have callsigns listed but on those I'm trying to find out what's underneath. The frequencies I'm interested in this time are 1680, 1660, 1590, 1550 (there is a semi-local XEBG but I'm trying to figure out what else is there), 1520 (nulling KVTA), 1510 (nulling KSPA), 1490, 1400, 1380 and 1340.
Times are given in UTC zone in 24-hour format, dates are 8 digits, year month day, without hyphens. All of these were recorded with the Tecsun PL-380, and I believe all with the Select-A-Tenna. With a few of them I placed the radio on a chain-link fence which boosted the signal a little. The filenames should be mostly self-explanatory, I hope.
 
AM gets better in the winter. You can take advantage of snow, but you can take advantage of shorter days which makes skywave better and last longer.
 
KNBR and KALL sound even better than your last daytime recordings of them but they don't sound like skywaves either.

The higher frequencies sound like almost nighttime reception.

This time of year, there's always some skywave all day on the X band but it's limited in distance.

I'll try to listen more to the ones you want to ID when I get the chance.
 
Effective conductivity goes up with declining temperature, even without snow. In my area of SE Michigan, there are 30-40 miles paths where groundwave at -15 degrees is a good four times the summer value as measured with a field strength meter. As I recall, there was minimal snow cover when the -15 degree temperature occurred. Over the same path in less extreme conditions, many in the winter are three times the summer values. These are also reflected in signal stregth meter readings and scan distances as well as overall coverage.
 
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