I run voltage-mode class D amplifiers (400 watts) on 137 and 505 as well as PDM
modulated
current-mode class D AM transmitters on 160 and 75 meters (375 watt carrier).
Efficiency in all
cases is in the low 90s. The best I've been able to achieve on 40 meters is 90%.
Jay W1VD WD2XNS WE2XGR/2
----- Original Message -----
From: "hamilton mal" <[email protected]>
To: "rsgb" <[email protected]>
Sent: Sunday, November 04, 2007 7:28 AM
Subject: LF: CLASS D and E
> 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
>
>
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