Re: LF: 74.550kHz Sep 29/30

[Hartmut Wolff <h-wolff@gmx.de>]

Hi Bob, Markus and all,

what about using a frequency around 72.250 in the future? It looks free 
on the screenshot.
73
Hartmut

Am 01.10.2013 08:35, schrieb Markus Vester:
> Here are clearer shots of the DCF77 sidebands from the morning:
> http://dl.dropboxusercontent.com/u/26404526/dcf77_prn_sidebands_131001_0605.png
> http://dl.dropboxusercontent.com/u/26404526/74k_131001_0600.png
> Notes:
> - the RX antenna is resonant around 75 kHz, which emphasizes the PRN
> sidebands below the DCF77 carrier. The fifth and sixth lobe are still
> visible. In reality, the upper sidebands are slightly stronger. This is
> probably due to an offset (or a 75 kHz notch) in the transmitter antenna
> matching, which happens to help us now.
> - the Swiss time signal HBG on 75 kHz is no longer on air.
> - there is an RTTY signal at 73.6 kHz which could be CFH.
> - the 1 Hz lines are surrounded by a somewhat regular fine structure,
> consisting of 16.6 mHz spaced sub-lines. This is probably due to parts
> of the BCD timecode and weather information data which are repeating or
> similar in consecutive minutes.
> Best 73,
> Markus (DF6NM)