LF: Re: CLASS D and E

To:	<[email protected]>
Subject:	LF: Re: CLASS D and E
From:	"Jay Rusgrove" <[email protected]>
Date:	Sun, 4 Nov 2007 15:35:24 -0500
References:	<000701c81ede$3af050e0$1ae4fc3e@g3kev>
Reply-to:	[email protected]
Sender:	[email protected]

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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