Re: LF: VLF Small magnetic antenna for Tx

[Jacek Lipkowski <sq5bpf@lipkowski.org>]

On Sat, 3 Feb 2018, VIGILANT Luis Fernández wrote:

> Jacek, you mentioned what I was midnight oiling here
> " If you want some semi-DX in the H-field, then try coupling into some long
> conductors (pipes, power lines, railway tracks etc)"
And i forgot phone lines :)

Actually there has been a 700m phone line, that was well grounded at the 
phone exchange (old exchange, no local modules were used, so the wire went 
all the way there). This makes a nice ground dipole when a 
transmitter is placed between the local ground and the grounded 
wire from the phone line. Putting abt.  30mA at 8.97kHz (this was when 
9kHz was the ITU limit) gave a very nice signal 600-700m from the phone 
line.
> What about coupling the loop to my 90m vertical ?
> Adding another transformer from loop to vertical or just winding some coils of 
> the vertical over the
> small loop ring would work ?
No, because the amount of current induced in the mast would be very small.

BTW i wish i had a 90m vertical.

VY 73

Jacek / SQ5BPF