LF: M0BMU test transmission on sunday evening.

[DL4YHF@aol.com]

Hello Jim and group,

Fine copy on Jim's PSK08 transmission at 137.500 through the local 50Hz QRM (received with an indoor ferrite antenna and a TS850, the signal was not audible but decodable).

Unfortunately I could not join the fun, but observing the QSO between Markus DF6NM and M0BMU was rewarding. Hope there will be some more reports for you.

One observation: The "squelch-killing" postamble tone used in PSK31 seemed to be missing in Jim's over, in contrast to DF6NM's transmission. 
(PSK08 is based on the PSK31 implementation by AE4JY in WinPSK, which itself is based on the brilliant work by G3PLX).
The decoder clears the accumulated squelch voltage when it detects the postable tone, avoiding garbage on the screen when the squelch slowly falls after a 'strong' signal.

Thanks for the demonstration !

Regards,
  Wolf DL4YHF.