[Lf] [Fwd: LF: Re: Coils and amplifiers]

[Andre' Kesteloot]

Peter Dodd wrote:

> Andy said:
>
> > Some of us don't have such large antennas as you, Peter.  For 1 Watt ERP
> > I would need approx 4kW RF.
>
> Yes, I am well aware of that - and that is why I mentioned I5TGC's LF
> antenna, which must be the smallest of the LF antennas in the LF group.
> However, the subject was loading coil cooling - and was it necessary.
> I only quoted my transmitter power and antenna current because that
> was the only experience I had of using higher power at LF
>
> While on the subject of power amplifiers the only successful design
> that I have seen is the one by G3LNP, see 'The LF Experimenter's
> Source Book', second edition.
> I have seen solid state amplifiers that use many separate amplifiers
> with the outputs combined using a ferrite transformer. This might be
> the way to go in the construction of a less lethal design.
> The Decca transmitters were designed with safety (and reliability) in mind.
>
> --
> Regards, Peter, G3LDO
>
> <g3ldo at zetnet.co.uk>