Re: Cape Perpetua (Oregon Cliff) DXpedition- Top Ten Signals from the South Pacific
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Richard,
Thanks very much for your comments on the recent DXpeditions.
<<< I still hope to hear audio from a DU someday. No hets have been heard from that direction since the spring equinox. Because of the QRM from KRMG and others on 740 kHz, I've given up on hearing Polynesia on 738. KRMG switches to daytime 50 kW a few minutes before local sunrise here, swamping anyone else on the frequency. I am unable to null it after that. >>>
738-Radio Polynesie (Tahiti) is not always a blowtorch on the west coast, and it goes through weak days, like every other DU. During last week's trip it didn't even make the "Top Ten," managing only a moderate mix with the Aussie 2NR on most days. Keep trying, though, Richard, and you will probably find it potent enough to get a weak audio signal through KRMG splatter sooner or later.
<<< How do you get around the internally generated noise on all the Tecsun ULR's around 890 kHz. I finally figured out this was what I was hearing most of the time on 891 kHz rather than a het from 4RN. It ran too late past sunrise to be from the Aussie. Checks at other times found the noise. >>>
Well, my PL-380 has the same internally-generated heterodynes as your PL-310 on 890 and other frequencies, Richard. The main difference is that when you have a large FSL antenna greatly boosting up the signal level of DU's like 890-5AN, the resulting DU signals completely overpower and swamp out the ULR's internally-generated heterodynes. It's kind of similar to the situation when a weak DU (738-Tahiti, for example) has a signal right next to a common west coast pest, 740-KCBS. There is a loud 2 kHz heterodyne generated, which sounds pretty irritating in MP3 recordings. But when 738-Tahiti rises up to a monster level and completely buries 740-KCBS' signal, the 2 kHz heterodyne is long gone.
Anyway, keep trying with persistence on the DU signals, Richard, and I'm pretty sure that you will track down some audio sooner or later.
73, Gary DeBock (in Puyallup, WA, USA)
-----Original Message----- From: RichardA To: ultralightdx Sent: Thu, Aug 22, 2013 10:52 am Subject: [ultralightdx] Re: Cape Perpetua (Oregon Cliff) DXpedition- Top Ten Signals from the South Pacific Gary:
Thank you for the reports and recordings from your most recent DXpedition. It must have been fun. I still hope to hear audio from a DU someday. No hets have been heard from that direction since the spring equinox. Because of the QRM from KRMG and others on 740 kHz, I've given up on hearing Polynesia on 738. KRMG switches to daytime 50 kW a few minutes before local sunrise here, swamping anyone else on the frequency. I am unable to null it after that. I'm thinking about setting up a double KAZ aerial to see if it helps. I have the space. How do you get around the internally generated noise on all the Tecsun ULR's around 890 kHz. I finally figured out this was what I was hearing most of the time on 891 kHz rather than a het from 4RN. It ran too late past sunrise to be from the Aussie. Checks at other times found the noise. You have a good fall DXing season. Give my best to the family. Richard. Richard Allen, near Perry OK USA. |
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