Re: [IRCA] 729 Southeast Asian Language at 1541 UTC

[Chuck Hutton <charlesh3@xxxxxxx>]

Gary -


We're well aware of the cause of the ULR audio rolloff.

I was trying to point out something that can be done post facto to improve your audio.

If you are saying you set a highpass filter to 321 Hertz, my vote is that  321 Hz is a very extreme value. Half that at most seems normal.

And as for ULR audio not matching perseus, of course it doesn't. But the goal here is to make the ULR audio better, not to compare it with perseus.


Chuck



________________________________
From: Gary DeBock <d1028gary@xxxxxxxxxxx>
Sent: Sunday, November 4, 2018 10:11 PM
To: Chuck Hutton; Mailing list for the International Radio Club of America
Subject: Re: [IRCA] 729 Southeast Asian Language at 1541 UTC

Chuck,

Thanks for your assessment on the 729 UnID TP recording from this morning.

<<< There's English in your recording. At :04 she says "this approach in the next summer". At :09, I think she says Myanmar.
Some Myanmar stations have carried English in this time period. >>>

Wow, her accent is so heavy that I never could have pulled out that English-- but now that you mention it, the "Myanmar" at 9 seconds stands out pretty clearly (even without any wishful thinking).

<<< The audio was difficult to understand. After correcting for the terrible rolloff above 1000 Hz and also removing everything below 150 Hertz, it was better. I can't attach the file due to list limits on attachments. >>>

The clipped-off audio above 1000 Hz is a congenital issue of the Ultralight radios in their 1 kHz DSP filtering selection, which is usually the only effective option when chasing split-frequency DX like this. In most of the recent recordings I've attempted to compensate somewhat by using Audacity's 321 Hz High Pass filter, but the resulting audio will still have rough edges in comparison to that of the Perseus-SDR and other SDR's.

In any case, thanks again for your assessment.

Gary (in Poipu, Hawaii)

On November 4, 2018 at 12:18 PM Chuck Hutton <charlesh3@xxxxxxx> wrote:


Gary:


There's English in your recording. At :04 she says "this approach in the next summer". At :09, I think she says Myanmar.

Some Myanmar stations have carried English in this time period.


The audio was difficult to understand. After correcting for the terrible rolloff above 1000 Hz and also removing everything below 150 Hertz, it was better. I can't attach the file due to list limits on attachments.


Chuck



________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Gary DeBock <d1028gary@xxxxxxxxxxx>
Sent: Sunday, November 4, 2018 11:30 AM
To: America, Mailing
Subject: [IRCA] 729 Southeast Asian Language at 1541 UTC

Despite unfavorable solar predictions the morning session in Poipu, Hawaii was actually quite good today. This female speaker in an apparent Southeast Asian language was received at 1541 this morning during a fade in JOCK, but the Myanmar parallels on 576 and 594 are totally wiped out by Hawaiian local splatter  https://dreamcrafts.box.com/s/8223u80ejoorrd2raxoebdiogn0kbfra

I know that Bill W., Chuck and Bruce have all received this station in Grayland, so it seems like I'm the last to track it down :-)


Gary DeBock (DXing in Poipu, Kauai, Hawaii)

7.5" loopstick CC Skywave SSB Ultralight +

5" Frequent Flyer FSL antenna



_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx



_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx