Re: Tecsun PL-360 7.5" Plug-in Loopstick Project Update


--- In ultralightdx@..., D1028Gary@... wrote:

Hi Stephen (and Tony),

As Tony related, it would be tough to receive 1134-Croatia on the west
coast if they are not transmitting :-) Their new hours (1600-2245 Z) certainly
don't sound good for west coast DXers!

As far as your chances to receive DX on 1134 kHz with your pest 1130-KSDO
only 6 miles away, unfortunately it's probably a long shot at best. Unless
you are able to null the station and still face the bearing of 300 degrees
(for TP's) or about 040 (for TA's), you are probably out of luck.
Yeah, 1134 would be tough, with 1134's 50+dBu splatter coming from a 350 deg heading.

Trying to receive TA's on the west coast using ULR's is not easy, except
for the super-stations like 1134-Croatia (previously), 1575-Farda and
I wonder if 1215 may be possible? KPRZ San Marcos-Poway's ~48-52dBu signal on 1210 is about 25.71 mi away, heading 326.09 degrees.
As for 1575, that may be tougher, even though their pest is farther away. KMIK Tempe, AZ's 50kW IBOC signal often touches 55-58dBu here, and it's 299.64 mi, heading 79.39 degrees.

Trying to receive any other TA's on the west coast with Ultralight
radios is really going "against the grain," and requires some serious
external antenna help. I was able to receive 675-Radio Maria (Holland), 693-BBC
and 756-DLF (Germany) last fall using the 9' PVC loop in the back yard,
but signals were typically like this 693-BBC recording on Oct.21:
_ ( On
the other hand, TA super-stations like 1134-Croatia would really boom in at
times, like on this recording of Oct. 15:
_ ( .
Would 675 be possible with the Select-A-Tenna? KIRN 670 Simi Valley isn't exactly a blowtorch, rarely topping 40dBu, but KNBR 680 San Fran, at sometimes 48dBu, may be a bit of a pest.
As for 756, am I out of luck even WITH the SAT? KFMB's 50kW hails from 7.3 mi, 320.65 deg, and is around 40-42dBu on 747 and 774, and probably 54-63dBu on 756.

As tough as it is to receive TA's on Ultralights on the west coast, it is
even tougher to receive TP's on Ultralights on the east coast. The only DXer
I know who has accomplished this was Brent Taylor during a DXpedition on
Canada's Prince Edward Island, receiving several Japanese "big guns" (747
and 774 kHz?) using a humble Sony SRF-59, inductively coupled to a Radio
Shack loop.

73, Gary
Speaking of dBu on local blowtorches, Gary, what do you typically indicate on some of your local pests on their channel with the stock antenna, and off, but nearby? For example, I get around 63dBu (max scale) on 600 24/7, 690 day, 760 fulltime, 910 night, 1130 fulltime, 1170 day and 1360 day. Daytime I get ~45dBu on 1155 and 1185 (around 1170, my strongest daytime signal), and ~40dBu on 747 and 774 (around 760, my strongest nighttime signal). For you, with 1450 KSUH a mile or so away, do you get any 50,00 readings 15-20kHz away, for example?

In a message dated 5/16/2010 4:54:47 A.M. Pacific Daylight Time,
pianoplayer88key@... writes:

Do I have any chance here in San Diego to get that station on 1134? I have
a local 10kW on 1130 (KSDO) that's 6.33 miles away at a heading of 350.03°,
so that may pose a bit of a challenge. A few barefoot signal readings in
1kHz BW, while facing KSDO's transmitter, are: 1130-1131=63dBu, 1132~50-54,
1133-1135~38-51, 1140~38-51, at which point the chatter starts to quiet
down. On 1141 it's 37-39dBu with some chatter but not nearly as much as on
1140, on 1142 there's little bits of chirps here and there at 37dBu, 1143 is
fairly quiet with about 35dBu.
Also what about the TPs on 747 and 774? I have a local 50kW nighttime KFMB
on 760 7.3 mi away, heading 320.65°, which is giving me readings of 39dBu
on those frequencies. I also have yet to log the TP on 594, thanks in part
to 600 KOGO, whose 5kW IBOC signal, 7.72 mi @ hdg 249.21°, is 34dBu.
Are there any TPs or TAs I should try for barefoot with the somewhat high
RF here? Before I got the PL-380 and was trying a couple other radios, I
remember I had the G8, and some of the local signals were indicating upwards
of 75-80dBu on their assigned frequencies. I kinda wish the PL-380 wasn't
limited to indicating 63dBu, as I have several stations that indicate that

--- In _ultralightdx@... (mailto:ultralightdx@...)
, D1028Gary@ wrote:

Thanks Tony,

Your 7.5" plug-in loopstick package is traveling faster than expected,
considering that it's a weekend with NHL playoff distractions :-) A
arrival would be great.

Yes, 1134-Croatia made a few booming appearances even right here in
Washington last fall, and it's too bad they cut their hours. On peak
evenings they would fade in around 5 PM here in October, and stick
around until
about 8:30 PM. I was able to receive it barefoot on a stock PL-310 (the
only TA ever received barefoot here), and boost up its signal to a very
healthy level with the 6' PVC tuned passive loop in the back yard.

Tony, I hope you will have as much fun with your 7.5" plug-in loopstick
I've had making them (and sending them out). There is something weirdly
about boosting up the AM sensitivity of this "Clark Kent" radio, and
making it a super DX performer!

73, Gary

In a message dated 5/15/2010 12:41:59 P.M. Pacific Daylight Time,
tonyward@ writes:

Mine is sitting in Mississauga Postal Centre (the other side of
where it arrived at 3 am this morning, according to tracking. I am
forward to plugging it in when it finishes the final 65 miles of its
journey Gary, possibly as early as Monday as it is through Customs
already. I am
also warming up a few of my classic Sonys --- like the 2010 --- and hope
to have time to play with this little beauty on other, less elaborate
circuits. No doubt I will have to prod it to resonate it off the 360.
Now if only
1134 Croatia hadn't chopped their evening hours a couple of months ago
I was hearing that barefoot nightly on the PL380 not so vry long ago ...

Your efforts, and contribution to the hobby, is very much appreciated by
me, and all others whose opposing thumbs are opposed mostly (it seems)
fine work Gary, and I thank you on behalf of Klutzes everywhere!

Tony (VE3NO) ComputerViz, NYAA Starfest On-Line

_http://www.nyaa.ca_ (

Now spending the BBQ Season channelling the Inner Carbon of Cows...

From: "D1028Gary@" <D1028Gary@>
To: _ultralightdx@... (mailto:ultralightdx@...)
Sent: Sat, May 15, 2010 3:12:29 PM
Subject: [ultralightdx] Tecsun PL-360 7.5" Plug-in Loopstick Project

Hello All,

Thanks to Richard and Kevin for their initial DXing reports on these
PL-360 7.5" upgrade loopsticks. The concept of plugging in a highly
loopstick to this DSP model appears to be very popular, and serious
orders hav
e been placed with Amidon (and other suppliers) to keep up with the

7.5" Loopsticks have already been shipped to Richard, Kevin, Tony, Greg,
and Barry. Phil's package will go out today, and John's should go out
Monday. Many more loopsticks are currently being constructed for
deserving DXers,
and the "mini-factory" here should be in operation for at least another
month. Those DXers who have expressed interest in the loopsticks may
them a little sooner than expected, due to improvements in the

Since the project offers a rare opportunity for non-technical DXers to
receive a huge AM (or LW) sensitivity boost without any radio
these 7.5" plug-in loopsticks are being offered at cost only, with
only for material and shipping ($31 total, for North American DXers).
over 20 orders already, however, a maximum of 25 loopsticks for the
project is planned, to provide time for other upcoming hobby and family

Initial work has also started on a new project to modify Tecsun PL-380
units (with their awesome 1 kHz DSP selectivity) to accept these 7.5"
loopsticks, designed for the PL-360. The electrical modification is very
simple, and only a few more mechanical refinements in the design will be
necessary. Those who have purchased these monster plug-in loopsticks for
PL-360 may have yet another transoceanic DX-chasing option, just in time
the Fall TA and TP-chasing season :-)

73, Gary DeBock (in Puyallup, WA, USA)

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