On Sun, 4 Nov 2007 12:28:05 -0000
"hamilton mal" <[email protected]> wrote:
> Hi all
> Class D and E amplifiers are supposed to give around 80/90 %
> efficiency. Has anyone actually achieved these figures. It seems
> anything above 60% is hard to arrive at using normal coils/capacitors.
>
> 73 de Mal/G3KEV
>
>
Hello Mal & LF,
The best I've acheived with Class-E has been about 70-75%. I understand
that you're supposed to select values of components and tune the o/p
stage for best efficiency at your chosen DC supply volts and target
power. Away from these points the efficiency won't be optimum.
70% is easily acheived by careful tuning. 80% and better has eluded me
so far.
Cheers,
John
--
John GM4SLV
IP90gg
Clousta, Shetland
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