[Lowfer] VLF Tacamo RTTY

[David L. Wilson]

Keep in mind it is actually 50 Hz shift not 85 Hz but 85 Hz shift will 
usually decode it and Channel One is a soft channel not a frequency.

One of the TACAMO passed near me today going out and back with it 
running WFM mux on UHF>

On 8/31/2020 10:51 PM, Garry wrote:
> TACAMO has been active recently on 17.8, 22.7, and 27.2 kHz, but not 
> knowing exactly when the transmissions start it's difficult to have RTTY 
> software ready to decode the initial signals. Finally decided to launch 
> MMTTY and MultiPSK in advance on 2 different setups, one tuned to 17.8 
> kHz and the other tuned to 27.2 kHz. The former paid off earlier today 
> with the following RTTY decodes:
> 
> CHANNEL ONE
>   CHANNEL ONE
>   CHANNEL ONE
>   CHANNDL ONE
>   CHANNEL ONE
>   CHANNEL ONE
>   CHANNEL ONE
>   CHANNEL ONE
>   CHANNEL ONE
>   CHANNELKKKKKZCZCZCZXLLXLLXLL
> ZZ
> BT
> FOURMA NOVMBSC
> VICOR SIX
> LFA SIX
> GOLF GOLFQ
> HOTEL SEVD
> THGEE HOWEL
> XRAX CHARLIE
> ALSA FOXTRGT
> XRAY DELTA
> XRAY UNINBRM
> SIX UNIFOU YANKEE PA ALFA
> 
> .
> 
> .
> 
> .
> 
> FOUR XRA
> VICTHOTEL
> XRAY CHARLIE
> ALFA FOXTROT
> XRAY DELTA
> XRAY UNIFORM
> SIX UNIFORM
> INDIAYTH
> EE
> ZULU YANKEE
> PAIA ALHO
> BT
> NNN
> NNN
> NNNN CHANNEL ONE
> CHANNEL ONE
> 
> CHANNEL NZH
> 
> This was using MultiPSK 4.31.4 set for 50 baud, Mark/Space 957/1042 (85 
> Hz shift), reverse reception. MMTTY using a 50 Hz shift rather than 85 
> Hz produced no decodes. The signal wasn't strong, as evidenced by the 
> numerous decoding errors, but it was strong enough something should have 
> resulted. One of these days I'll be present when the RTTY appears and 
> will try 85 Hz shift for MMTTY to see if that works.
> 
> 73, Garry, K3SIW, EN52ta, Elgin, IL
> 
> 
> 
> 
> 
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-- 
David L. Wilson