Hello Wolf,
Nice email ;-)
Well, no it is a benzine car, an almost 22 years old VW Golf II !! ;-)
You could know it from the VLF pictures, HI :-) So there is no internal
electric bus! And i have a car radio (ALDI!) that receives on VHF/MF/LF
and i do not have QRM by the ignition coil! Once i made holidays at the
Nordsee (JO33) i drove with the car and listened to DLF/153 kHz during
the whole tour without problems. Only HV transmission lines above 110 kV
cause QRM.
So maybe i have a little better situation to receive DF6NM on LF /m.
Otherwise i have to drive on the highway, lets say 180 km/h (the maximum
of this car) and have to switch off the engine during Markus'
transmission that must be short then until i have to accelerate again at
90 km/h :-)). If this will not work i have to drive to a highway near
Nürnberg :-)
The magnet foot antenna is already ordered and i am curious about the
results ;-) Mostly i need it for receiving LF during the VLF
experiments, e.g. to the xband QSO 9/137 with DF6NM, and maybe DF0WD? :-)
73, Stefan
Am 30.12.2010 12:03, schrieb wolf_dl4yhf:
Hi Stefan,
you wrote:
> This should allow me to easily receive 137 kHz while driving the car!
> Hopefully there is not to much QRM during engine is running.
> So maybe i can try a crossband QSO with DF6NM TXing on 137 and me
answering on 30m while beeing on the highway :-)
Maybe, it's a Diesel engine, and the alternator properly low-pass
filtered. I tried this years ago, and the QRM from the ignition coil,
and / or the alternator was horrible. No big surprise that car radios
with AM LF broadcast receivers have disappeared. And weak-signal
reception "LF mobile" is even more a challenge.
In my Corolla, I would even have to disconnect the battery (!) if I
was to receive VLF (and, most likely, LF too) because some internal
digital bus (most likely CAN or LIN) remains active, with the ignition
and everything else turned off. For temporary V(!)LF operation on a
remote site, I use a simple FM oscillator at the transmitter now, and
listen to the VLF signals in the car's radio, using a distance of 10 m
or so.
Cheers and a happy new year,
Wolf DL4YHF .
|
