[Fwd: LF: Re: "RF Design" magazine article]
Wed, 19 May 1999 17:35:36 -0400
> Good morning from ZL where the QRN is reducing as winter approaches.
> Walter G3JKV mentioned the RF Design article on low power LF propagation.
> Nat ZL3VN and myself have regular QSOs using backyard sized antennas and
> QRP over a 300km (mostly sea) path on 181.4kHz. We find that 1 watt
> transmitter output is sufficient for R5 regular CW most of the time.
> Dropping to 0.5 watts output makes readability marginal. However, the
> signals are regular CW in a 500 hz bandwidth so there is certainly scope
> for extending the distance or reducing the power greatly.
> Mike ZL4OL