Re: [IRCA] 621-Pyongyang BS/ VoK-- Audio Situation Becoming Critical

[Nick Hall-Patch <nhp@xxxxxxxx>]

Didn't the discussion also cover whether the hum increases in 
intensity as  Chongjin fades down, and decreases as it dominates the 
frequency?   I believe that increasing hum with increasing Chongjin 
signal strength would indicate that the hum is part of Chongjin's 
signal, rather than due to the heterodyne with other signal(s).

best wishes,

nick



At 20:46 2018-11-06, Mauno Ritola wrote:
> Or could the hum be just heterodyne caused by 50 Hz difference 
> between Chongjin tx and Heilongjiang? I checked via a Japanese 
> receiver and I don't see strong side carriers, which would be 
> typical for mains hum otherwise.
>
> Mauno
>
>
> Gary DeBock kirjoitti 6.11.2018 klo 9:25:
> > A few months back there was a discussion on the list about the 
> > transmitted audio from the 621-Pyongyang BS/ Voice of Korea station 
> > in Chongjin, N. Korea-- specifically, whether there was audio hum 
> > on the frequency from a bad transmitter, or whether the bad audio 
> > was caused by a drifting frequency.
> >
> >       Yesterday morning a recording was made of 621-Pyongyang BS 
> > mixing with 621-China (Heilongjiang) at the 1500 TOH, with the two 
> > sets of pips loudly overlapping at the 39 second 
> > point  https://dreamcrafts.box.com/s/612kbk25hqqlxh1r4qfzaxzeuuwktbeo
> >
> > The throbbing hum from Chongjin's transmitter is pretty obvious, 
> > distorting not only the Pyongyang BS audio but also covering 
> > Heilongjiang's clean signal. The overlapping time pips from the two 
> > are in the same bizarre league as the "Cuckoo Clock" overlapping 
> > pips from 918-Shandong and RNZ at 1700 UTC in the Cook Islands.
> >
> >
> > Gary DeBock (DXing in Poipu, Hawaii)
> >
> >
> >
> > _______________________________________________
> > 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

Nick Hall-Patch
Victoria, BC
Canada 

_______________________________________________
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