HFU HF Underground

Loggings => Utility => Topic started by: ka1iic on November 08, 2017, 1522 UTC

Title: OTHR on 6810khz and 7810khz 50khz wide
Post by: ka1iic on November 08, 2017, 1522 UTC

OTHR  6810 khz 1519utc 08 Nov 2017  50 khz wide 
OTHR  7810 khz 1519utc 08 Nov 2017  50 Khz wide

Very strong signal into Troy Ohio moderate selective fading.

Title: Re: OTHR on 6810khz and 7810khz 50khz wide
Post by: kingfisher on February 08, 2018, 2227 UTC

Good lord look at it tonight

(http://i65.tinypic.com/2nrof36.png)

(http://i65.tinypic.com/fegxg8.png)

Title: Re: OTHR on 6810khz and 7810khz 50khz wide
Post by: Josh on February 10, 2018, 1833 UTC

Shame they don't send waterfall pics for us to enjoy.

Title: Re: OTHR on 6810khz and 7810khz 50khz wide
Post by: Token on February 11, 2018, 1348 UTC

These are probably Chinese sky wave OTHRs (without a recording I cannot be sure).  I don't know how often ya'll hear them there, but here on the west coast they are a curse every morning.

In the following picture there are at least 11 active, and maybe as many as 13, from about 5100 kHz to about 9150 kHz.  These guys change frequency as needed, with no real "channels" as such, but they have typical ranges they fall in, for example 6800 to 7000 kHz is hammered most mornings.  Note that there are 3 different waveforms in use by the ones in this picture, that is why they all do not look quite the same.

(https://a4.pbase.com/o10/50/78250/1/166993028.3bjCwOH5.Chinese_OTHRs.jpg)

T!