Re: LF: Which effect is this?

[DL4YHF@aol.com]

Hello Geri and group,

Maybe one reason why the MW car radio can be easily obstructed by highway bridges is this:

Think of the telescopic car antenna as a purely capacitive "E-field-probe". The E-field of a "low-frequency" signal can easily be shorted by the steel construction of the bridge (in the near field zone). 
I guess if the car had a ferrite antenna like many of the old tabletop radios, things would be very different.

Just a quick thought...

73 Wolf.

Btw: The best time to be received at CT1DRP seems to be late night, when the DCF39 is also strong in CT. My 80mw got through quite well around (local) midnight but that was another season. I transmitted 5-minute long pulses at the beginning of every hour between 20:00 and 02:00 UTC.