Marcin, 

My experience is that a few earth rods work much better than 
electrically short radials on 136kHz. 

But when I operate on 160m, radials are much better than the earth 
rods.

My soil is 1m of clay over chalk.

Mike, G3XDV
===========

> I'd like to design a ground for 136kHz/472kHz. I have a few hundred
> metres of steel tape at my disposal for this. I'd like to find out how
> deep into ground 136kHz and 472kHz respectively can go? How deep do I
> have to dig the tape for 136kHz and for 472kHz, or what would suit
> both frequencies?
> 
> Thanks in advance.
> 73! Marcin SQ2BXI
> 
> 
> 
> 
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