[IRCA] Possible TP/DU on 738 yesterday AM near San Diego?

[Stephen Airy <pianoplayer88key@xxxxxxxxx>]

Hi all...
 
I decided on a whim to check around a little bit with my Tecsun PL-606 and Select-A-Tenna.  When I got to 738, I heard a loud het mixing with 740-KCBS.  Upon attempting to null KCBS (which is basically northwest of me), I thought I caught snippets of audio in between KCBS's splatter, and recorded a few minutes...
http://www.mediafire.com/?r7n3t9y91sl8mm7
I did trim the recording some so it mostly has spots where I thought I heard audio, but I had a hard time making anything out.  Maybe some of you experts could lend some insight? :)  This was heard near 32 45 40 N 116 56 50 W with the PL-606 & SAT aimed primarily west/southwest or southwest, approximately.
 
Also I heard a het on 702, but that signal was considerably weaker.  I did record it for a little bit, but I don't remember hearing much if any audio pop up.  Just in case, though... what might be some possibilities on that frequency?
 
I also heard hints of carriers on 1116, 567, 657 (I've logged Pyongyang in the winter here), but not enough audio for me to turn on the recorder.  (I used a tunable external oscillator(*1) to beat with the carriers to determine their presence, or lack thereof.)
(*1) an Eico Model 710 grid dip meter, which I had to keep several feet from the radio (testing my armspan cause I was tuning/turning the radio+sat and tuning the oscillator at the same time and turning it off to monitor a frequency) because up close (within a couple inches) it pins the RSSI meter at 98 dBu, which usually only happens within about a hundred meters or so of a 50kW transmitter, for example
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