Hi all... I took my PL-380, SAT & Zoom H2 outside this past week and
recorded a few stations. Most were recorded yesterday (2010-03-17) at
around 3pm, but one was recorded a little over a week ago (2010-03-08),
also at around 3pm.
All the ones recorded yesterday were in the 1 kHz bandwidth
distance = 116.371 mi, heading = 315.08° (reference (from my location):
360°,0° = north, 180° = south)
distance = 445.415 mi, heading = 319.41°
QRM was from a local - 690 XEWW (may be listed as XETRA), 77kW
directional day, distance 32.355 mi, heading 188.75°, barefoot PL-380
signal usually 63dBu RSSI (btw what does that stand for?), 25dB S/N
distance = 439.377 mi, heading = 319.97°
QRM is from 800 XESPN, listed as 1kW, distance 17.532 mi, heading
distance = 81.117 mi, heading = 88.87°
QRM is from 1240 KNSN, 1kW non-directional, distance 11.188 mi, heading
distance = 84.973 mi, heading = 342.30°
distance = 14.373 mi, heading = 209.25°
This was recorded with the SAT, but can be heard fairly well barefoot (a
little above the soft mute threshold if I remember correctly, although it's
night right now and the QRM prevents me from checking)
The one recorded on the 8th was mostly in the 1kHz, but I did attempt to
switch to 2kHz and tune 2kHz off in an attempt to get away from local QRM.
Also I'm not sure I have positively ID'd it, though. I attempted
to DX it today and couldn't get any trace of it.
distance = 625.882 mi, heading = 24.76°
heavy QRM from 690 XEWW (or is it still XETRA?) - 77kW directional
day, distance 32.355 mi, heading 188.75°, barefoot PL-380 signal usually
63dBu RSSI, 25dB S/N.
Listening post is close enough to 32°45'40"N 116°56'50"W so that a legal
part-15 FM station transmitting at that spot (although there is none that I'm
aware of) would be receivable barefoot at my actual location. As
mentioned before, equipment used was:
radio: PL-380, unmodded (except for repair of a broken tuning knob which,
after a few hiccups, was successful, although it did require repairing a trace
on the PCB)
recorder: Samson Zoom H2, using direct audio cable connection
In many cases, in spite of using the 1kHz bandwidth and tuning 1kHz away
from the QRM on the far side of the desired station, local stations 10 (or 11)
kHz away were all but wiping out the stations I was trying to receive.
Is there anything that can be done to help alleviate that, short of
Also, I'm having some difficulty around the middle of the band.
There's a 50kW local (1170 KCBQ) that's 9.354 miles away at a heading of
7.28°, with a directional
antenna pattern basically aimed toward me
. For about a few
hundred kHz either way, the RSSI is about 30dBu in "blank spots" on the dial.
(In more rural areas it's more like about 15dBu or so.) Can
anything be done (for example, rewinding or replacing the internal loopstick)
to alleviate that? The apparent desensitization makes it difficult, if
not impossible, to receive a few stations I would like to be able to listen to
- 1110 KDIS Pasadena, CA (would possibly almost be strong enough to stop on
while scanning, but with the desensitization is somewhat below the soft mute
threshold), 1150 KTLK Los Angeles, CA, 1180 KERI Wasco-Greenacres, CA, and, if
possible, 1160 KSL Salt Lake City (hey, if 700 from north of there can be
heard here, why not 1160, even if it requires a SAT)? Also, 10kW 1130
KSDO, 6.337 mi, directional
350.28°, isn't making things any easier.
And, even if I am able to fix some of the barefoot deficiencies, there
are times when I will want the extra boost of a larger loop antenna than the
SAT, which just isn't cutting it anymore. How much of an improvement
would a 5.5" PVC loop be (or is the 4' one the largest that can be built
without requiring a jumper to enable tuning the entire band) over the SAT?
(I mainly would like to, as much as possible, improve the barefoot
performance, as I will not be able to use any type of external antenna for the
vast majority of my casual listening (for example, walking / biking
around town, walking into a local mall, yogurt shop, etc).) Anyone know
of a way to put a loopstick in the battery compartment, and somehow figure out
another way to get a 3.6V supply, while maintaining the barefoot appearance?
I don't really care about LW all that much, as I am unable to detect any
LW stations near me. It seems there should be plenty of room for a
semi-decent stick there (I thought a month or two ago someone mentioned that
they wanted to experiment with that, but I haven't heard anything since then),
and I'd be willing to deal with somewhat of a reduction of battery life (I
have plenty of Sanyo Eneloop 2000mAh AAs.) Also I would be interested in
learning more about sdwillingham's method of defeating soft mute
(although I do want to retain an internal speaker).
P.S. anyone know how to embed images in a group message using the web