[AMRadio] 4-1000A Grounded Grid Class-C


Bernie Doran qedconsultants at embarqmail.com
Thu Oct 3 19:01:33 EDT 2013


The legal limit is 1500 out, why else use a 4-1000. he asked about class C, 
a far larger grid swing. if he wanted linear for AM. then the 4-1000 makes 
sense, but why fool with that unless designed for legal output.   And you 
just proved the drive point on your amp. 30 watts for 375 out and on peaks 
it takes 140 watts.   Bernie W8RPW
----- Original Message ----- 
From: "Paul Baldock" <paul at paulbaldock.com>
To: <amradio at mailman.qth.net>
Sent: Thursday, October 03, 2013 2:25 PM
Subject: Re: [AMRadio] 4-1000A Grounded Grid Class-C


> At 10:31 AM 10/3/2013, you wrote:
>
>
>> >It would also need about 150 to 200
>> > Watts of drive.
>
> My grounded grid Class-B 4-1000A (zero bias) amp with around 4KV on it 
> takes about 30W to get 375W out (the legal limit at 100% mod). Biased for 
> Class-C I would think that it would be similar.
>
> - Paul
>
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