Re: [IRCA] Puyallup, WA Ultralight TP's for 10-10

[Walter Salmaniw <canswl@xxxxxxxxx>]

Bruce and Gary, over the years I've collected a number of screen catches of
these buzzes, and they are usually from North Korea.  Interesting to see the
multiple waterfalls all around the carrier frequency.  As for 738, I don't
often get much from them, being bothered by lots of 740 splatter.  You
definitely seem to have a pipeline........Walt

On Wed, Oct 12, 2011 at 4:56 AM, <d1028gary@xxxxxxx> wrote:

> Hi Bruce,
>
> Thanks for your very interesting comments on the 738 kHz spurious
> signal issues that you observed at Grayland.
>
> While you, Chuck and Tom were heading to Grayland I was able to get a
> fairly good recording of 738-BEL2's throbbing hum here in Puyallup on
> October 7th (Friday morning) on the PL-380 Ultralight. For some strange
> reason 738-Taiwan seems to propagate here quite well, and the station
> has had these transmitter issues continually since our TP season began
> last month http://www.mediafire.com/?**xyhx16mgq7s9brr<http://www.mediafire.com/?xyhx16mgq7s9brr>
>
> Taiwan is a relatively wealthy country, so it's a mystery why these
> transmitter issues have continued for so long. Ironically, 657-Pyongyang
> (the ultimate cash-strapped state) seems to have finally corrected its
> long-term buzzing carrier. Thanks  for the Grayland DXpedition logs-- very
> informative!
>
> 73, Gary
>
>
>
> -----Original Message-----
> From: Bruce Portzer <bportzer@xxxxxxxxxxx>
> To: Mailing list for the International Radio Club of America
> <irca@xxxxxxxxxxxxxxxx>
> Sent: Tue, Oct 11, 2011 8:21 pm
> Subject: Re: [IRCA] Puyallup, WA Ultralight TP's for 10-10
>
>
>
> On 10/10/2011 07:58, d1028gary@xxxxxxx wrote:
>
>> Hello All,
>>
>>
>>
>>
>> 738- BEL2  Penghu, Taiwan  Fair with undermodulated audio and
>>                           throbbing hum 1402
>>
> Gary
>
> I checked 738 several times at Grayland last weekend using the
> Winradio's spectral display.  Someone (presumably Taiwan) is putting
> out
> spurious carriers at approximately +/- 45, 90, 135, 180, and 225 Hz,
> each one slightly weaker than the next closest carrier.  There were
> probably others more than 225 Hz from 738, but they were lost in the
> noise.
>
> That would certainly explain the hum you've been hearing.  The radio's
> audio filter does a nice job of filtering out the hum if you set the
> cutoff to 250 Hz.   I also noticed something similar on 1098 and maybe
> 1-2 other frequencies.   I'm amazed that it hasn't been fixed after all
> these months.
>
> Bruce
>
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