We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: XLA/XLB ALE who are they?  (Read 1143 times)

Offline AlanC

  • Jr. Member
  • **
  • Posts: 27
  • Sheffield UK
    • View Profile
XLA/XLB ALE who are they?
« on: November 18, 2016, 1259 UTC »
Anyone know who these are?

XLA and XLB net
5106.2, 5210.2, 6393.0, 7505.7 ALE USB

Every 2-3 minutes on each frequency yesterday 17th November 2016, always XLB calling XLA:

[2016-11-17 20:07:03] [NORMAL MODE][TO][XLA][TO][XLA][EOM]
[2016-11-17 20:07:04]
[2016-11-17 20:07:04] [NORMAL MODE][TO][XLA][EOM]
[2016-11-17 20:07:05]
[2016-11-17 20:07:05] [NORMAL MODE][TO][XLA][EOM]
[2016-11-17 20:07:05]
[2016-11-17 20:07:05] [NORMAL MODE][TO][XLA][TO][XLA][EOM]
[2016-11-17 20:07:07]
[2016-11-17 20:07:07] [NORMAL MODE][TO][XLA][CMD USER UNIQUE WORD][TIS][XLB][EOM]

Suddenly went QRT at 22:00 utc.

Cheers
Alan
Cheers
Alan

Offline Cornel

  • Full Member
  • ***
  • Posts: 149
  • FF79QF
    • View Profile
Re: XLA/XLB ALE who are they?
« Reply #1 on: November 18, 2016, 2020 UTC »
Hi Alan
It's unknown i guess. http://www.ominous-valve.com/ale-list.txt

What antenna and radio did you use, signal strength, direction?

Historical ICAO Callsign
Expo   XLA   JN   XL Airways UK Limited - United Kingdom

If i had to guess i'd say it's chinese or mexican. Who knows...

Edit: it could be XLA US DoD loc: unknown

73
C.


« Last Edit: November 18, 2016, 2033 UTC by Cornel »
Cordoba, Argentina.
JRC NRD-545, JRC NRD-525, FRT-7700, RTLSDR F0013, 40m of wire @ 8m, vertical whip on @ 7m

Offline AlanC

  • Jr. Member
  • **
  • Posts: 27
  • Sheffield UK
    • View Profile
Re: XLA/XLB ALE who are they?
« Reply #2 on: November 19, 2016, 1132 UTC »
Hi Cornel,

Many thanks for this.

I was using the Twente SDR, my long wire antenna blew down earlier this year and I've not put it back up yet!

The only thing I noted was that as the evening wore on, the signals were stronger on the higher frequency channels- in fact I stopped hearing them altogether on the two 5MHz channels after about 21:00. I thought this odd as it is the reverse of what you would expect if they were 'local' i.e. European. But it could also indicate a source far to the east (in the daylight zone) I guess.

Best 73
Alan
« Last Edit: November 19, 2016, 1141 UTC by AlanC »
Cheers
Alan